/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/array-eq-symm.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2abb09bbbae98a04ae2fcc735832bfdba44f6fbc-2abb09b [2021-06-05 21:02:27,928 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 21:02:27,931 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 21:02:27,967 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 21:02:28,024 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 [2021-06-05 21:02:28,057 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 21:02:28,057 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 21:02:28,058 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 21:02:28,058 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 21:02:28,060 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 21:02:28,060 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 21:02:28,060 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 21:02:28,060 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 21:02:28,061 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 21:02:28,061 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 21:02:28,061 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 21:02:28,062 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 21:02:28,062 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 21:02:28,062 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 21:02:28,062 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 21:02:28,062 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 21:02:28,062 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 21:02:28,062 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 21:02:28,063 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 21:02:28,063 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 21:02:28,063 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 21:02:28,063 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 21:02:28,063 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 21:02:28,063 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 21:02:28,064 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 21:02:28,064 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 21:02:28,064 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 21:02:28,064 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 21:02:28,064 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 21:02:28,064 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 21:02:28,064 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 21:02:28,065 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 21:02:28,374 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 21:02:28,391 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 21:02:28,393 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 21:02:28,394 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 21:02:28,395 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 21:02:28,396 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/array-eq-symm.wvr.bpl [2021-06-05 21:02:28,405 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/array-eq-symm.wvr.bpl' [2021-06-05 21:02:28,439 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 21:02:28,441 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 21:02:28,442 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 21:02:28,442 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 21:02:28,442 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 21:02:28,453 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:02:28" (1/1) ... [2021-06-05 21:02:28,461 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:02:28" (1/1) ... [2021-06-05 21:02:28,467 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 21:02:28,468 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 21:02:28,469 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 21:02:28,470 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 21:02:28,476 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:02:28" (1/1) ... [2021-06-05 21:02:28,477 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:02:28" (1/1) ... [2021-06-05 21:02:28,478 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:02:28" (1/1) ... [2021-06-05 21:02:28,478 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:02:28" (1/1) ... [2021-06-05 21:02:28,481 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:02:28" (1/1) ... [2021-06-05 21:02:28,484 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:02:28" (1/1) ... [2021-06-05 21:02:28,485 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:02:28" (1/1) ... [2021-06-05 21:02:28,486 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 21:02:28,487 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 21:02:28,487 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 21:02:28,488 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 21:02:28,489 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:02:28" (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 [2021-06-05 21:02:28,565 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 21:02:28,565 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 21:02:28,566 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 21:02:28,566 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 21:02:28,566 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 21:02:28,566 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 21:02:28,567 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 21:02:28,567 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 21:02:28,567 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 21:02:28,568 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 21:02:28,765 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 21:02:28,765 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 21:02:28,767 INFO L202 PluginConnector]: Adding new model array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 09:02:28 BoogieIcfgContainer [2021-06-05 21:02:28,767 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 21:02:28,768 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 21:02:28,768 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 21:02:28,771 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 21:02:28,771 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:02:28" (1/2) ... [2021-06-05 21:02:28,772 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b400315 and model type array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 09:02:28, skipping insertion in model container [2021-06-05 21:02:28,772 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 09:02:28" (2/2) ... [2021-06-05 21:02:28,773 INFO L111 eAbstractionObserver]: Analyzing ICFG array-eq-symm.wvr.bpl [2021-06-05 21:02:28,777 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 21:02:28,778 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 21:02:28,778 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 21:02:28,779 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 21:02:28,804 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-05 21:02:28,822 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-05 21:02:28,837 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 21:02:28,837 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 21:02:28,838 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 21:02:28,838 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 21:02:28,838 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 21:02:28,838 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 21:02:28,838 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 21:02:28,838 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-05 21:02:28,845 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 28 places, 25 transitions, 66 flow [2021-06-05 21:02:28,855 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 55 states, 53 states have (on average 2.207547169811321) internal successors, (117), 54 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:28,857 INFO L276 IsEmpty]: Start isEmpty. Operand has 55 states, 53 states have (on average 2.207547169811321) internal successors, (117), 54 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:28,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-05 21:02:28,869 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:02:28,870 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:02:28,870 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:02:28,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:02:28,874 INFO L82 PathProgramCache]: Analyzing trace with hash -169700611, now seen corresponding path program 1 times [2021-06-05 21:02:28,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:02:28,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160755844] [2021-06-05 21:02:28,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:02:28,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:02:28,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:02:28,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:02:28,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160755844] [2021-06-05 21:02:28,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160755844] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:02:28,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:02:28,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 21:02:29,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723265647] [2021-06-05 21:02:29,003 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 21:02:29,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:02:29,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 21:02:29,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 21:02:29,016 INFO L87 Difference]: Start difference. First operand has 55 states, 53 states have (on average 2.207547169811321) internal successors, (117), 54 states have internal predecessors, (117), 0 states have call successors, (0), 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) [2021-06-05 21:02:29,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:02:29,072 INFO L93 Difference]: Finished difference Result 102 states and 226 transitions. [2021-06-05 21:02:29,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 21:02:29,074 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 [2021-06-05 21:02:29,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:02:29,082 INFO L225 Difference]: With dead ends: 102 [2021-06-05 21:02:29,082 INFO L226 Difference]: Without dead ends: 95 [2021-06-05 21:02:29,083 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 21:02:29,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-06-05 21:02:29,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 82. [2021-06-05 21:02:29,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.2839506172839505) internal successors, (185), 81 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:29,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 185 transitions. [2021-06-05 21:02:29,118 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 185 transitions. Word has length 11 [2021-06-05 21:02:29,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:02:29,118 INFO L482 AbstractCegarLoop]: Abstraction has 82 states and 185 transitions. [2021-06-05 21:02:29,118 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) [2021-06-05 21:02:29,119 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 185 transitions. [2021-06-05 21:02:29,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 21:02:29,120 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:02:29,120 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:02:29,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 21:02:29,120 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:02:29,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:02:29,121 INFO L82 PathProgramCache]: Analyzing trace with hash -214361416, now seen corresponding path program 1 times [2021-06-05 21:02:29,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:02:29,122 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436923986] [2021-06-05 21:02:29,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:02:29,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:02:29,170 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:02:29,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:02:29,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436923986] [2021-06-05 21:02:29,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436923986] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:02:29,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:02:29,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 21:02:29,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932911029] [2021-06-05 21:02:29,173 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 21:02:29,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:02:29,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 21:02:29,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 21:02:29,174 INFO L87 Difference]: Start difference. First operand 82 states and 185 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:29,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:02:29,239 INFO L93 Difference]: Finished difference Result 160 states and 352 transitions. [2021-06-05 21:02:29,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 21:02:29,240 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 21:02:29,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:02:29,242 INFO L225 Difference]: With dead ends: 160 [2021-06-05 21:02:29,242 INFO L226 Difference]: Without dead ends: 160 [2021-06-05 21:02:29,242 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 21:02:29,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-06-05 21:02:29,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 94. [2021-06-05 21:02:29,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.3118279569892475) internal successors, (215), 93 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:29,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 215 transitions. [2021-06-05 21:02:29,259 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 215 transitions. Word has length 14 [2021-06-05 21:02:29,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:02:29,260 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 215 transitions. [2021-06-05 21:02:29,260 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:29,260 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 215 transitions. [2021-06-05 21:02:29,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 21:02:29,261 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:02:29,261 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:02:29,261 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 21:02:29,261 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:02:29,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:02:29,262 INFO L82 PathProgramCache]: Analyzing trace with hash -632263843, now seen corresponding path program 1 times [2021-06-05 21:02:29,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:02:29,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286261968] [2021-06-05 21:02:29,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:02:29,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:02:29,334 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:02:29,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:02:29,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286261968] [2021-06-05 21:02:29,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286261968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:02:29,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626067629] [2021-06-05 21:02:29,336 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 [2021-06-05 21:02:29,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:02:29,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 21:02:29,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:02:29,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:02:29,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626067629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:02:29,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:02:29,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-06-05 21:02:29,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637851269] [2021-06-05 21:02:29,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 21:02:29,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:02:29,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 21:02:29,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 21:02:29,483 INFO L87 Difference]: Start difference. First operand 94 states and 215 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:29,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:02:29,565 INFO L93 Difference]: Finished difference Result 176 states and 390 transitions. [2021-06-05 21:02:29,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 21:02:29,567 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 21:02:29,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:02:29,570 INFO L225 Difference]: With dead ends: 176 [2021-06-05 21:02:29,575 INFO L226 Difference]: Without dead ends: 176 [2021-06-05 21:02:29,576 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 21:02:29,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-06-05 21:02:29,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 103. [2021-06-05 21:02:29,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.3137254901960786) internal successors, (236), 102 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:29,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 236 transitions. [2021-06-05 21:02:29,589 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 236 transitions. Word has length 14 [2021-06-05 21:02:29,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:02:29,589 INFO L482 AbstractCegarLoop]: Abstraction has 103 states and 236 transitions. [2021-06-05 21:02:29,589 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:29,589 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 236 transitions. [2021-06-05 21:02:29,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 21:02:29,590 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:02:29,591 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:02:29,805 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-06-05 21:02:29,805 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:02:29,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:02:29,806 INFO L82 PathProgramCache]: Analyzing trace with hash -1209640048, now seen corresponding path program 2 times [2021-06-05 21:02:29,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:02:29,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501358400] [2021-06-05 21:02:29,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:02:29,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:02:29,873 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:02:29,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:02:29,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501358400] [2021-06-05 21:02:29,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501358400] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:02:29,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:02:29,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 21:02:29,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037712939] [2021-06-05 21:02:29,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 21:02:29,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:02:29,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 21:02:29,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 21:02:29,880 INFO L87 Difference]: Start difference. First operand 103 states and 236 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:29,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:02:29,957 INFO L93 Difference]: Finished difference Result 144 states and 333 transitions. [2021-06-05 21:02:29,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 21:02:29,958 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 21:02:29,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:02:29,960 INFO L225 Difference]: With dead ends: 144 [2021-06-05 21:02:29,960 INFO L226 Difference]: Without dead ends: 142 [2021-06-05 21:02:29,960 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 21:02:29,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-06-05 21:02:29,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 103. [2021-06-05 21:02:29,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.303921568627451) internal successors, (235), 102 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:29,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 235 transitions. [2021-06-05 21:02:29,982 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 235 transitions. Word has length 14 [2021-06-05 21:02:29,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:02:29,983 INFO L482 AbstractCegarLoop]: Abstraction has 103 states and 235 transitions. [2021-06-05 21:02:29,983 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:29,983 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 235 transitions. [2021-06-05 21:02:29,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 21:02:29,984 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:02:29,984 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:02:29,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 21:02:29,984 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:02:29,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:02:29,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1531630391, now seen corresponding path program 2 times [2021-06-05 21:02:29,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:02:29,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339031306] [2021-06-05 21:02:29,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:02:29,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:02:30,034 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:02:30,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:02:30,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339031306] [2021-06-05 21:02:30,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339031306] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:02:30,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:02:30,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 21:02:30,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849672285] [2021-06-05 21:02:30,035 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 21:02:30,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:02:30,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 21:02:30,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 21:02:30,036 INFO L87 Difference]: Start difference. First operand 103 states and 235 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:30,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:02:30,080 INFO L93 Difference]: Finished difference Result 144 states and 329 transitions. [2021-06-05 21:02:30,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 21:02:30,080 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 21:02:30,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:02:30,081 INFO L225 Difference]: With dead ends: 144 [2021-06-05 21:02:30,081 INFO L226 Difference]: Without dead ends: 139 [2021-06-05 21:02:30,083 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 21:02:30,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-06-05 21:02:30,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 103. [2021-06-05 21:02:30,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.284313725490196) internal successors, (233), 102 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:30,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 233 transitions. [2021-06-05 21:02:30,099 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 233 transitions. Word has length 14 [2021-06-05 21:02:30,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:02:30,099 INFO L482 AbstractCegarLoop]: Abstraction has 103 states and 233 transitions. [2021-06-05 21:02:30,099 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:30,099 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 233 transitions. [2021-06-05 21:02:30,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:02:30,104 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:02:30,104 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:02:30,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 21:02:30,104 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:02:30,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:02:30,105 INFO L82 PathProgramCache]: Analyzing trace with hash -10930008, now seen corresponding path program 1 times [2021-06-05 21:02:30,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:02:30,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927401849] [2021-06-05 21:02:30,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:02:30,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:02:30,158 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:02:30,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:02:30,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927401849] [2021-06-05 21:02:30,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927401849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:02:30,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541662184] [2021-06-05 21:02:30,159 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 [2021-06-05 21:02:30,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:02:30,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:02:30,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:02:30,248 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:02:30,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541662184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:02:30,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:02:30,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4] total 6 [2021-06-05 21:02:30,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399697013] [2021-06-05 21:02:30,249 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:02:30,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:02:30,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:02:30,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:02:30,250 INFO L87 Difference]: Start difference. First operand 103 states and 233 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:30,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:02:30,322 INFO L93 Difference]: Finished difference Result 300 states and 674 transitions. [2021-06-05 21:02:30,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:02:30,322 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:02:30,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:02:30,324 INFO L225 Difference]: With dead ends: 300 [2021-06-05 21:02:30,324 INFO L226 Difference]: Without dead ends: 286 [2021-06-05 21:02:30,324 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 34.2ms TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:02:30,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-06-05 21:02:30,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 143. [2021-06-05 21:02:30,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.352112676056338) internal successors, (334), 142 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:30,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 334 transitions. [2021-06-05 21:02:30,331 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 334 transitions. Word has length 17 [2021-06-05 21:02:30,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:02:30,331 INFO L482 AbstractCegarLoop]: Abstraction has 143 states and 334 transitions. [2021-06-05 21:02:30,331 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:30,331 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 334 transitions. [2021-06-05 21:02:30,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:02:30,332 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:02:30,332 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:02:30,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:02:30,548 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:02:30,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:02:30,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1675583288, now seen corresponding path program 1 times [2021-06-05 21:02:30,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:02:30,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566902603] [2021-06-05 21:02:30,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:02:30,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:02:30,626 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:02:30,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:02:30,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566902603] [2021-06-05 21:02:30,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566902603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:02:30,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448324328] [2021-06-05 21:02:30,627 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 [2021-06-05 21:02:30,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:02:30,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:02:30,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:02:30,696 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:02:30,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448324328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:02:30,696 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:02:30,696 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 6 [2021-06-05 21:02:30,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927171031] [2021-06-05 21:02:30,697 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:02:30,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:02:30,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:02:30,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:02:30,698 INFO L87 Difference]: Start difference. First operand 143 states and 334 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:30,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:02:30,752 INFO L93 Difference]: Finished difference Result 248 states and 569 transitions. [2021-06-05 21:02:30,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 21:02:30,753 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:02:30,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:02:30,754 INFO L225 Difference]: With dead ends: 248 [2021-06-05 21:02:30,755 INFO L226 Difference]: Without dead ends: 248 [2021-06-05 21:02:30,755 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 39.3ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:02:30,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-06-05 21:02:30,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 194. [2021-06-05 21:02:30,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.4248704663212437) internal successors, (468), 193 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:30,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 468 transitions. [2021-06-05 21:02:30,763 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 468 transitions. Word has length 17 [2021-06-05 21:02:30,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:02:30,763 INFO L482 AbstractCegarLoop]: Abstraction has 194 states and 468 transitions. [2021-06-05 21:02:30,763 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:30,763 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 468 transitions. [2021-06-05 21:02:30,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:02:30,764 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:02:30,764 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:02:30,986 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:02:30,987 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:02:30,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:02:30,987 INFO L82 PathProgramCache]: Analyzing trace with hash -1837184638, now seen corresponding path program 2 times [2021-06-05 21:02:30,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:02:30,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932653166] [2021-06-05 21:02:30,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:02:30,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:02:31,055 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:02:31,056 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:02:31,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932653166] [2021-06-05 21:02:31,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932653166] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:02:31,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:02:31,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 21:02:31,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801365501] [2021-06-05 21:02:31,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 21:02:31,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:02:31,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 21:02:31,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 21:02:31,057 INFO L87 Difference]: Start difference. First operand 194 states and 468 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:31,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:02:31,105 INFO L93 Difference]: Finished difference Result 311 states and 725 transitions. [2021-06-05 21:02:31,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 21:02:31,105 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:02:31,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:02:31,108 INFO L225 Difference]: With dead ends: 311 [2021-06-05 21:02:31,108 INFO L226 Difference]: Without dead ends: 304 [2021-06-05 21:02:31,108 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.7ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 21:02:31,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-06-05 21:02:31,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 252. [2021-06-05 21:02:31,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 2.4701195219123506) internal successors, (620), 251 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:31,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 620 transitions. [2021-06-05 21:02:31,117 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 620 transitions. Word has length 17 [2021-06-05 21:02:31,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:02:31,118 INFO L482 AbstractCegarLoop]: Abstraction has 252 states and 620 transitions. [2021-06-05 21:02:31,118 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:31,118 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 620 transitions. [2021-06-05 21:02:31,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:02:31,119 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:02:31,119 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:02:31,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-06-05 21:02:31,120 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:02:31,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:02:31,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1678798648, now seen corresponding path program 1 times [2021-06-05 21:02:31,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:02:31,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572539668] [2021-06-05 21:02:31,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:02:31,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:02:31,184 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:02:31,184 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:02:31,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572539668] [2021-06-05 21:02:31,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572539668] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:02:31,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:02:31,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 21:02:31,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041887801] [2021-06-05 21:02:31,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 21:02:31,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:02:31,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 21:02:31,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 21:02:31,188 INFO L87 Difference]: Start difference. First operand 252 states and 620 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:31,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:02:31,219 INFO L93 Difference]: Finished difference Result 243 states and 574 transitions. [2021-06-05 21:02:31,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 21:02:31,220 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:02:31,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:02:31,221 INFO L225 Difference]: With dead ends: 243 [2021-06-05 21:02:31,221 INFO L226 Difference]: Without dead ends: 208 [2021-06-05 21:02:31,222 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.6ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 21:02:31,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-06-05 21:02:31,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 208. [2021-06-05 21:02:31,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.4009661835748792) internal successors, (497), 207 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:31,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 497 transitions. [2021-06-05 21:02:31,227 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 497 transitions. Word has length 17 [2021-06-05 21:02:31,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:02:31,227 INFO L482 AbstractCegarLoop]: Abstraction has 208 states and 497 transitions. [2021-06-05 21:02:31,227 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:31,227 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 497 transitions. [2021-06-05 21:02:31,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:02:31,234 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:02:31,234 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:02:31,234 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-06-05 21:02:31,235 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:02:31,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:02:31,235 INFO L82 PathProgramCache]: Analyzing trace with hash 1963262152, now seen corresponding path program 2 times [2021-06-05 21:02:31,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:02:31,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943724557] [2021-06-05 21:02:31,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:02:31,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:02:31,285 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:02:31,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:02:31,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943724557] [2021-06-05 21:02:31,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943724557] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:02:31,288 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:02:31,288 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 21:02:31,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115890438] [2021-06-05 21:02:31,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 21:02:31,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:02:31,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 21:02:31,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 21:02:31,291 INFO L87 Difference]: Start difference. First operand 208 states and 497 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:31,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:02:31,331 INFO L93 Difference]: Finished difference Result 222 states and 527 transitions. [2021-06-05 21:02:31,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 21:02:31,332 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:02:31,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:02:31,333 INFO L225 Difference]: With dead ends: 222 [2021-06-05 21:02:31,333 INFO L226 Difference]: Without dead ends: 222 [2021-06-05 21:02:31,333 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 15.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 21:02:31,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-06-05 21:02:31,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 222. [2021-06-05 21:02:31,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 2.3846153846153846) internal successors, (527), 221 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:31,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 527 transitions. [2021-06-05 21:02:31,339 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 527 transitions. Word has length 17 [2021-06-05 21:02:31,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:02:31,339 INFO L482 AbstractCegarLoop]: Abstraction has 222 states and 527 transitions. [2021-06-05 21:02:31,339 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:31,339 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 527 transitions. [2021-06-05 21:02:31,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:02:31,340 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:02:31,340 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:02:31,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-06-05 21:02:31,340 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:02:31,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:02:31,340 INFO L82 PathProgramCache]: Analyzing trace with hash 215291064, now seen corresponding path program 3 times [2021-06-05 21:02:31,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:02:31,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173446832] [2021-06-05 21:02:31,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:02:31,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:02:31,398 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:02:31,399 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:02:31,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173446832] [2021-06-05 21:02:31,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173446832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:02:31,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300570] [2021-06-05 21:02:31,399 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:02:31,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:02:31,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:02:31,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:02:31,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:02:31,715 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:02:31,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300570] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:02:31,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 21:02:31,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [5] total 12 [2021-06-05 21:02:31,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096874029] [2021-06-05 21:02:31,716 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:02:31,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:02:31,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:02:31,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:02:31,717 INFO L87 Difference]: Start difference. First operand 222 states and 527 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:31,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:02:31,901 INFO L93 Difference]: Finished difference Result 421 states and 987 transitions. [2021-06-05 21:02:31,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:02:31,902 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:02:31,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:02:31,904 INFO L225 Difference]: With dead ends: 421 [2021-06-05 21:02:31,904 INFO L226 Difference]: Without dead ends: 414 [2021-06-05 21:02:31,904 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 247.3ms TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:02:31,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-06-05 21:02:31,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 278. [2021-06-05 21:02:31,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 2.4151624548736463) internal successors, (669), 277 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:31,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 669 transitions. [2021-06-05 21:02:31,913 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 669 transitions. Word has length 20 [2021-06-05 21:02:31,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:02:31,913 INFO L482 AbstractCegarLoop]: Abstraction has 278 states and 669 transitions. [2021-06-05 21:02:31,913 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:31,913 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 669 transitions. [2021-06-05 21:02:31,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:02:31,914 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:02:31,914 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:02:32,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:02:32,129 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:02:32,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:02:32,129 INFO L82 PathProgramCache]: Analyzing trace with hash -2043788104, now seen corresponding path program 4 times [2021-06-05 21:02:32,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:02:32,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759074344] [2021-06-05 21:02:32,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:02:32,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:02:32,190 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:02:32,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:02:32,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759074344] [2021-06-05 21:02:32,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759074344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:02:32,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486556144] [2021-06-05 21:02:32,190 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:02:32,225 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:02:32,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:02:32,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:02:32,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:02:32,334 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:02:32,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486556144] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:02:32,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 21:02:32,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 8 [2021-06-05 21:02:32,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535997063] [2021-06-05 21:02:32,337 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:02:32,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:02:32,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:02:32,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:02:32,338 INFO L87 Difference]: Start difference. First operand 278 states and 669 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:32,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:02:32,469 INFO L93 Difference]: Finished difference Result 592 states and 1376 transitions. [2021-06-05 21:02:32,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 21:02:32,469 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:02:32,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:02:32,472 INFO L225 Difference]: With dead ends: 592 [2021-06-05 21:02:32,472 INFO L226 Difference]: Without dead ends: 592 [2021-06-05 21:02:32,472 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 86.4ms TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:02:32,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2021-06-05 21:02:32,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 376. [2021-06-05 21:02:32,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 375 states have (on average 2.541333333333333) internal successors, (953), 375 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:32,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 953 transitions. [2021-06-05 21:02:32,485 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 953 transitions. Word has length 20 [2021-06-05 21:02:32,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:02:32,485 INFO L482 AbstractCegarLoop]: Abstraction has 376 states and 953 transitions. [2021-06-05 21:02:32,486 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:32,486 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 953 transitions. [2021-06-05 21:02:32,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:02:32,487 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:02:32,487 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:02:32,709 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 21:02:32,709 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:02:32,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:02:32,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1610963566, now seen corresponding path program 5 times [2021-06-05 21:02:32,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:02:32,710 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685493121] [2021-06-05 21:02:32,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:02:32,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:02:32,763 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:02:32,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:02:32,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685493121] [2021-06-05 21:02:32,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685493121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:02:32,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260015393] [2021-06-05 21:02:32,764 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:02:32,805 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:02:32,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:02:32,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:02:32,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:02:32,878 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:02:32,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260015393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:02:32,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:02:32,879 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 6 [2021-06-05 21:02:32,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599007677] [2021-06-05 21:02:32,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:02:32,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:02:32,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:02:32,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:02:32,881 INFO L87 Difference]: Start difference. First operand 376 states and 953 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:33,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:02:33,009 INFO L93 Difference]: Finished difference Result 751 states and 1816 transitions. [2021-06-05 21:02:33,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:02:33,010 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:02:33,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:02:33,013 INFO L225 Difference]: With dead ends: 751 [2021-06-05 21:02:33,013 INFO L226 Difference]: Without dead ends: 751 [2021-06-05 21:02:33,013 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 72.0ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:02:33,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2021-06-05 21:02:33,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 527. [2021-06-05 21:02:33,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 527 states, 526 states have (on average 2.659695817490494) internal successors, (1399), 526 states have internal predecessors, (1399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:33,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 1399 transitions. [2021-06-05 21:02:33,031 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 1399 transitions. Word has length 20 [2021-06-05 21:02:33,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:02:33,031 INFO L482 AbstractCegarLoop]: Abstraction has 527 states and 1399 transitions. [2021-06-05 21:02:33,031 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:33,031 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 1399 transitions. [2021-06-05 21:02:33,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:02:33,033 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:02:33,033 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:02:33,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:02:33,249 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:02:33,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:02:33,249 INFO L82 PathProgramCache]: Analyzing trace with hash 1876435461, now seen corresponding path program 6 times [2021-06-05 21:02:33,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:02:33,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875116853] [2021-06-05 21:02:33,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:02:33,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:02:33,289 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:02:33,289 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:02:33,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875116853] [2021-06-05 21:02:33,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875116853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:02:33,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176357604] [2021-06-05 21:02:33,290 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:02:33,322 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:02:33,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:02:33,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:02:33,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:02:33,376 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:02:33,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176357604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:02:33,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:02:33,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 5 [2021-06-05 21:02:33,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171048663] [2021-06-05 21:02:33,377 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 21:02:33,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:02:33,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 21:02:33,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 21:02:33,378 INFO L87 Difference]: Start difference. First operand 527 states and 1399 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:33,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:02:33,452 INFO L93 Difference]: Finished difference Result 960 states and 2485 transitions. [2021-06-05 21:02:33,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 21:02:33,452 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:02:33,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:02:33,457 INFO L225 Difference]: With dead ends: 960 [2021-06-05 21:02:33,457 INFO L226 Difference]: Without dead ends: 956 [2021-06-05 21:02:33,457 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 28.2ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:02:33,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 956 states. [2021-06-05 21:02:33,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 956 to 785. [2021-06-05 21:02:33,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 785 states, 784 states have (on average 2.752551020408163) internal successors, (2158), 784 states have internal predecessors, (2158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:33,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 2158 transitions. [2021-06-05 21:02:33,482 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 2158 transitions. Word has length 20 [2021-06-05 21:02:33,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:02:33,482 INFO L482 AbstractCegarLoop]: Abstraction has 785 states and 2158 transitions. [2021-06-05 21:02:33,482 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:33,482 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 2158 transitions. [2021-06-05 21:02:33,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:02:33,484 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:02:33,484 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:02:33,706 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:02:33,708 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:02:33,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:02:33,708 INFO L82 PathProgramCache]: Analyzing trace with hash 1254555051, now seen corresponding path program 7 times [2021-06-05 21:02:33,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:02:33,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482462022] [2021-06-05 21:02:33,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:02:33,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:02:33,752 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:02:33,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:02:33,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482462022] [2021-06-05 21:02:33,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482462022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:02:33,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044082129] [2021-06-05 21:02:33,752 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:02:33,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:02:33,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:02:33,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:02:33,839 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:02:33,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044082129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:02:33,839 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:02:33,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 5 [2021-06-05 21:02:33,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387149276] [2021-06-05 21:02:33,840 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 21:02:33,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:02:33,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 21:02:33,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 21:02:33,841 INFO L87 Difference]: Start difference. First operand 785 states and 2158 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:33,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:02:33,937 INFO L93 Difference]: Finished difference Result 966 states and 2482 transitions. [2021-06-05 21:02:33,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 21:02:33,938 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:02:33,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:02:33,942 INFO L225 Difference]: With dead ends: 966 [2021-06-05 21:02:33,942 INFO L226 Difference]: Without dead ends: 966 [2021-06-05 21:02:33,943 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 39.8ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:02:33,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 966 states. [2021-06-05 21:02:33,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 966 to 785. [2021-06-05 21:02:33,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 785 states, 784 states have (on average 2.739795918367347) internal successors, (2148), 784 states have internal predecessors, (2148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:33,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 2148 transitions. [2021-06-05 21:02:33,965 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 2148 transitions. Word has length 20 [2021-06-05 21:02:33,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:02:33,965 INFO L482 AbstractCegarLoop]: Abstraction has 785 states and 2148 transitions. [2021-06-05 21:02:33,965 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:33,965 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 2148 transitions. [2021-06-05 21:02:33,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:02:33,968 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:02:33,968 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:02:34,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-05 21:02:34,177 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:02:34,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:02:34,177 INFO L82 PathProgramCache]: Analyzing trace with hash 322738604, now seen corresponding path program 8 times [2021-06-05 21:02:34,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:02:34,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545714410] [2021-06-05 21:02:34,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:02:34,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:02:34,207 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:02:34,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:02:34,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545714410] [2021-06-05 21:02:34,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545714410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:02:34,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535019506] [2021-06-05 21:02:34,208 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 [2021-06-05 21:02:34,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:02:34,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:02:34,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:02:34,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:02:34,306 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:02:34,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535019506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:02:34,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:02:34,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-05 21:02:34,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736650886] [2021-06-05 21:02:34,307 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 21:02:34,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:02:34,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 21:02:34,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 21:02:34,308 INFO L87 Difference]: Start difference. First operand 785 states and 2148 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:34,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:02:34,362 INFO L93 Difference]: Finished difference Result 861 states and 2300 transitions. [2021-06-05 21:02:34,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 21:02:34,363 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:02:34,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:02:34,368 INFO L225 Difference]: With dead ends: 861 [2021-06-05 21:02:34,368 INFO L226 Difference]: Without dead ends: 858 [2021-06-05 21:02:34,368 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 22.4ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 21:02:34,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 858 states. [2021-06-05 21:02:34,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 858 to 781. [2021-06-05 21:02:34,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 781 states, 780 states have (on average 2.7346153846153847) internal successors, (2133), 780 states have internal predecessors, (2133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:34,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 781 states to 781 states and 2133 transitions. [2021-06-05 21:02:34,387 INFO L78 Accepts]: Start accepts. Automaton has 781 states and 2133 transitions. Word has length 20 [2021-06-05 21:02:34,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:02:34,387 INFO L482 AbstractCegarLoop]: Abstraction has 781 states and 2133 transitions. [2021-06-05 21:02:34,387 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:34,387 INFO L276 IsEmpty]: Start isEmpty. Operand 781 states and 2133 transitions. [2021-06-05 21:02:34,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:02:34,388 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:02:34,388 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:02:34,611 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:02:34,611 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:02:34,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:02:34,611 INFO L82 PathProgramCache]: Analyzing trace with hash -1057166664, now seen corresponding path program 9 times [2021-06-05 21:02:34,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:02:34,612 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630106383] [2021-06-05 21:02:34,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:02:34,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:02:34,653 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:02:34,653 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:02:34,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630106383] [2021-06-05 21:02:34,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630106383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:02:34,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566790133] [2021-06-05 21:02:34,654 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 [2021-06-05 21:02:34,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:02:34,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:02:34,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:02:34,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:02:34,732 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:02:34,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566790133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:02:34,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:02:34,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-05 21:02:34,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137275741] [2021-06-05 21:02:34,733 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 21:02:34,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:02:34,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 21:02:34,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 21:02:34,734 INFO L87 Difference]: Start difference. First operand 781 states and 2133 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:34,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:02:34,814 INFO L93 Difference]: Finished difference Result 1114 states and 2914 transitions. [2021-06-05 21:02:34,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:02:34,814 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:02:34,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:02:34,819 INFO L225 Difference]: With dead ends: 1114 [2021-06-05 21:02:34,819 INFO L226 Difference]: Without dead ends: 1114 [2021-06-05 21:02:34,819 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 32.2ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:02:34,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114 states. [2021-06-05 21:02:34,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114 to 899. [2021-06-05 21:02:34,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 899 states, 898 states have (on average 2.771714922048998) internal successors, (2489), 898 states have internal predecessors, (2489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:34,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 2489 transitions. [2021-06-05 21:02:34,844 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 2489 transitions. Word has length 20 [2021-06-05 21:02:34,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:02:34,844 INFO L482 AbstractCegarLoop]: Abstraction has 899 states and 2489 transitions. [2021-06-05 21:02:34,844 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:34,844 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 2489 transitions. [2021-06-05 21:02:34,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:02:34,846 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:02:34,846 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:02:35,069 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-05 21:02:35,069 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:02:35,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:02:35,070 INFO L82 PathProgramCache]: Analyzing trace with hash -1634542869, now seen corresponding path program 10 times [2021-06-05 21:02:35,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:02:35,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207100236] [2021-06-05 21:02:35,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:02:35,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:02:35,106 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:02:35,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:02:35,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207100236] [2021-06-05 21:02:35,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207100236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:02:35,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112962265] [2021-06-05 21:02:35,107 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 [2021-06-05 21:02:35,134 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:02:35,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:02:35,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:02:35,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:02:35,182 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:02:35,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112962265] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:02:35,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:02:35,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 5 [2021-06-05 21:02:35,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936579232] [2021-06-05 21:02:35,183 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 21:02:35,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:02:35,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 21:02:35,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 21:02:35,184 INFO L87 Difference]: Start difference. First operand 899 states and 2489 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:35,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:02:35,270 INFO L93 Difference]: Finished difference Result 1380 states and 3776 transitions. [2021-06-05 21:02:35,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:02:35,270 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:02:35,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:02:35,276 INFO L225 Difference]: With dead ends: 1380 [2021-06-05 21:02:35,276 INFO L226 Difference]: Without dead ends: 1370 [2021-06-05 21:02:35,276 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 35.3ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:02:35,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1370 states. [2021-06-05 21:02:35,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1370 to 1228. [2021-06-05 21:02:35,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1228 states, 1227 states have (on average 2.8247758761206194) internal successors, (3466), 1227 states have internal predecessors, (3466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:35,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1228 states to 1228 states and 3466 transitions. [2021-06-05 21:02:35,306 INFO L78 Accepts]: Start accepts. Automaton has 1228 states and 3466 transitions. Word has length 20 [2021-06-05 21:02:35,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:02:35,306 INFO L482 AbstractCegarLoop]: Abstraction has 1228 states and 3466 transitions. [2021-06-05 21:02:35,306 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:35,306 INFO L276 IsEmpty]: Start isEmpty. Operand 1228 states and 3466 transitions. [2021-06-05 21:02:35,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:02:35,308 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:02:35,308 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:02:35,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-05 21:02:35,529 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:02:35,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:02:35,529 INFO L82 PathProgramCache]: Analyzing trace with hash 2038544017, now seen corresponding path program 11 times [2021-06-05 21:02:35,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:02:35,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057895890] [2021-06-05 21:02:35,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:02:35,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:02:35,556 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:02:35,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:02:35,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057895890] [2021-06-05 21:02:35,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057895890] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:02:35,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062988476] [2021-06-05 21:02:35,557 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 [2021-06-05 21:02:35,581 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:02:35,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:02:35,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:02:35,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:02:35,624 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:02:35,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062988476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:02:35,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:02:35,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 5 [2021-06-05 21:02:35,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437142742] [2021-06-05 21:02:35,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 21:02:35,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:02:35,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 21:02:35,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 21:02:35,626 INFO L87 Difference]: Start difference. First operand 1228 states and 3466 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:35,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:02:35,715 INFO L93 Difference]: Finished difference Result 1400 states and 3809 transitions. [2021-06-05 21:02:35,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 21:02:35,715 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:02:35,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:02:35,721 INFO L225 Difference]: With dead ends: 1400 [2021-06-05 21:02:35,721 INFO L226 Difference]: Without dead ends: 1400 [2021-06-05 21:02:35,721 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 38.7ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:02:35,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1400 states. [2021-06-05 21:02:35,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1400 to 1248. [2021-06-05 21:02:35,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1248 states, 1247 states have (on average 2.814755412991179) internal successors, (3510), 1247 states have internal predecessors, (3510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:35,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1248 states to 1248 states and 3510 transitions. [2021-06-05 21:02:35,751 INFO L78 Accepts]: Start accepts. Automaton has 1248 states and 3510 transitions. Word has length 20 [2021-06-05 21:02:35,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:02:35,751 INFO L482 AbstractCegarLoop]: Abstraction has 1248 states and 3510 transitions. [2021-06-05 21:02:35,751 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:35,751 INFO L276 IsEmpty]: Start isEmpty. Operand 1248 states and 3510 transitions. [2021-06-05 21:02:35,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:02:35,753 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:02:35,753 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:02:35,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-05 21:02:35,976 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:02:35,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:02:35,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1106727570, now seen corresponding path program 12 times [2021-06-05 21:02:35,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:02:35,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452258137] [2021-06-05 21:02:35,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:02:35,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:02:36,002 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:02:36,002 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:02:36,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452258137] [2021-06-05 21:02:36,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452258137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:02:36,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139757610] [2021-06-05 21:02:36,002 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 21:02:36,045 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 21:02:36,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:02:36,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:02:36,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:02:36,084 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:02:36,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139757610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:02:36,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:02:36,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-05 21:02:36,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390123470] [2021-06-05 21:02:36,084 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 21:02:36,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:02:36,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 21:02:36,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 21:02:36,085 INFO L87 Difference]: Start difference. First operand 1248 states and 3510 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:36,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:02:36,148 INFO L93 Difference]: Finished difference Result 1485 states and 3980 transitions. [2021-06-05 21:02:36,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 21:02:36,149 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:02:36,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:02:36,154 INFO L225 Difference]: With dead ends: 1485 [2021-06-05 21:02:36,154 INFO L226 Difference]: Without dead ends: 1482 [2021-06-05 21:02:36,154 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 21.0ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 21:02:36,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1482 states. [2021-06-05 21:02:36,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1482 to 1250. [2021-06-05 21:02:36,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1250 states, 1249 states have (on average 2.8086469175340274) internal successors, (3508), 1249 states have internal predecessors, (3508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:36,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1250 states to 1250 states and 3508 transitions. [2021-06-05 21:02:36,186 INFO L78 Accepts]: Start accepts. Automaton has 1250 states and 3508 transitions. Word has length 20 [2021-06-05 21:02:36,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:02:36,186 INFO L482 AbstractCegarLoop]: Abstraction has 1250 states and 3508 transitions. [2021-06-05 21:02:36,186 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:36,186 INFO L276 IsEmpty]: Start isEmpty. Operand 1250 states and 3508 transitions. [2021-06-05 21:02:36,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:02:36,188 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:02:36,188 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:02:36,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:02:36,393 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:02:36,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:02:36,393 INFO L82 PathProgramCache]: Analyzing trace with hash 400971561, now seen corresponding path program 13 times [2021-06-05 21:02:36,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:02:36,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685012583] [2021-06-05 21:02:36,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:02:36,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:02:36,431 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:02:36,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:02:36,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685012583] [2021-06-05 21:02:36,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685012583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:02:36,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692307732] [2021-06-05 21:02:36,432 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 [2021-06-05 21:02:36,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:02:36,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:02:36,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:02:36,520 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:02:36,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692307732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:02:36,521 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:02:36,521 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 6 [2021-06-05 21:02:36,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184624515] [2021-06-05 21:02:36,521 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:02:36,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:02:36,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:02:36,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:02:36,522 INFO L87 Difference]: Start difference. First operand 1250 states and 3508 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:36,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:02:36,642 INFO L93 Difference]: Finished difference Result 1426 states and 3852 transitions. [2021-06-05 21:02:36,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:02:36,643 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:02:36,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:02:36,648 INFO L225 Difference]: With dead ends: 1426 [2021-06-05 21:02:36,649 INFO L226 Difference]: Without dead ends: 1426 [2021-06-05 21:02:36,649 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 57.5ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:02:36,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1426 states. [2021-06-05 21:02:36,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1426 to 1193. [2021-06-05 21:02:36,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1193 states, 1192 states have (on average 2.8003355704697985) internal successors, (3338), 1192 states have internal predecessors, (3338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:36,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1193 states to 1193 states and 3338 transitions. [2021-06-05 21:02:36,702 INFO L78 Accepts]: Start accepts. Automaton has 1193 states and 3338 transitions. Word has length 20 [2021-06-05 21:02:36,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:02:36,702 INFO L482 AbstractCegarLoop]: Abstraction has 1193 states and 3338 transitions. [2021-06-05 21:02:36,702 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:36,702 INFO L276 IsEmpty]: Start isEmpty. Operand 1193 states and 3338 transitions. [2021-06-05 21:02:36,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:02:36,704 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:02:36,704 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:02:36,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:02:36,928 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:02:36,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:02:36,928 INFO L82 PathProgramCache]: Analyzing trace with hash 1313790136, now seen corresponding path program 14 times [2021-06-05 21:02:36,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:02:36,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558816916] [2021-06-05 21:02:36,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:02:36,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:02:36,967 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:02:36,968 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:02:36,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558816916] [2021-06-05 21:02:36,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558816916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:02:36,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169251936] [2021-06-05 21:02:36,968 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 [2021-06-05 21:02:37,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:02:37,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:02:37,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:02:37,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:02:37,055 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:02:37,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169251936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:02:37,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:02:37,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 21:02:37,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800630511] [2021-06-05 21:02:37,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 21:02:37,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:02:37,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 21:02:37,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 21:02:37,056 INFO L87 Difference]: Start difference. First operand 1193 states and 3338 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:37,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:02:37,127 INFO L93 Difference]: Finished difference Result 1396 states and 3748 transitions. [2021-06-05 21:02:37,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 21:02:37,128 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:02:37,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:02:37,133 INFO L225 Difference]: With dead ends: 1396 [2021-06-05 21:02:37,133 INFO L226 Difference]: Without dead ends: 1382 [2021-06-05 21:02:37,134 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 37.0ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:02:37,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1382 states. [2021-06-05 21:02:37,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1382 to 1217. [2021-06-05 21:02:37,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1217 states, 1216 states have (on average 2.7779605263157894) internal successors, (3378), 1216 states have internal predecessors, (3378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:37,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1217 states to 1217 states and 3378 transitions. [2021-06-05 21:02:37,159 INFO L78 Accepts]: Start accepts. Automaton has 1217 states and 3378 transitions. Word has length 20 [2021-06-05 21:02:37,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:02:37,160 INFO L482 AbstractCegarLoop]: Abstraction has 1217 states and 3378 transitions. [2021-06-05 21:02:37,160 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:37,160 INFO L276 IsEmpty]: Start isEmpty. Operand 1217 states and 3378 transitions. [2021-06-05 21:02:37,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 21:02:37,162 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:02:37,162 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:02:37,385 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-06-05 21:02:37,385 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:02:37,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:02:37,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1149983723, now seen corresponding path program 1 times [2021-06-05 21:02:37,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:02:37,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494592349] [2021-06-05 21:02:37,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:02:37,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:02:37,435 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:02:37,435 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:02:37,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494592349] [2021-06-05 21:02:37,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494592349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:02:37,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130768503] [2021-06-05 21:02:37,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:02:37,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:02:37,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:02:37,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:02:37,550 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:02:37,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130768503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:02:37,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:02:37,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-05 21:02:37,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425852555] [2021-06-05 21:02:37,551 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:02:37,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:02:37,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:02:37,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:02:37,551 INFO L87 Difference]: Start difference. First operand 1217 states and 3378 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:37,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:02:37,878 INFO L93 Difference]: Finished difference Result 1620 states and 4189 transitions. [2021-06-05 21:02:37,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:02:37,878 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 21:02:37,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:02:37,884 INFO L225 Difference]: With dead ends: 1620 [2021-06-05 21:02:37,885 INFO L226 Difference]: Without dead ends: 1620 [2021-06-05 21:02:37,885 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 178.1ms TimeCoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:02:37,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1620 states. [2021-06-05 21:02:37,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1620 to 1363. [2021-06-05 21:02:37,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1363 states, 1362 states have (on average 2.6908957415565347) internal successors, (3665), 1362 states have internal predecessors, (3665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:37,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1363 states to 1363 states and 3665 transitions. [2021-06-05 21:02:37,915 INFO L78 Accepts]: Start accepts. Automaton has 1363 states and 3665 transitions. Word has length 23 [2021-06-05 21:02:37,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:02:37,915 INFO L482 AbstractCegarLoop]: Abstraction has 1363 states and 3665 transitions. [2021-06-05 21:02:37,916 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:37,916 INFO L276 IsEmpty]: Start isEmpty. Operand 1363 states and 3665 transitions. [2021-06-05 21:02:37,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 21:02:37,918 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:02:37,918 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:02:38,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:02:38,141 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:02:38,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:02:38,141 INFO L82 PathProgramCache]: Analyzing trace with hash -1870263307, now seen corresponding path program 15 times [2021-06-05 21:02:38,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:02:38,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990453541] [2021-06-05 21:02:38,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:02:38,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:02:38,184 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:02:38,185 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:02:38,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990453541] [2021-06-05 21:02:38,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990453541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:02:38,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649665931] [2021-06-05 21:02:38,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:02:38,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:02:38,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:02:38,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:02:38,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:02:38,267 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:02:38,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649665931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:02:38,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:02:38,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-05 21:02:38,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528692947] [2021-06-05 21:02:38,267 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 21:02:38,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:02:38,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 21:02:38,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 21:02:38,268 INFO L87 Difference]: Start difference. First operand 1363 states and 3665 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:38,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:02:38,341 INFO L93 Difference]: Finished difference Result 1903 states and 5027 transitions. [2021-06-05 21:02:38,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 21:02:38,341 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 21:02:38,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:02:38,349 INFO L225 Difference]: With dead ends: 1903 [2021-06-05 21:02:38,349 INFO L226 Difference]: Without dead ends: 1896 [2021-06-05 21:02:38,349 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.5ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 21:02:38,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1896 states. [2021-06-05 21:02:38,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1896 to 1797. [2021-06-05 21:02:38,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1797 states, 1796 states have (on average 2.693207126948775) internal successors, (4837), 1796 states have internal predecessors, (4837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:38,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1797 states to 1797 states and 4837 transitions. [2021-06-05 21:02:38,388 INFO L78 Accepts]: Start accepts. Automaton has 1797 states and 4837 transitions. Word has length 23 [2021-06-05 21:02:38,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:02:38,388 INFO L482 AbstractCegarLoop]: Abstraction has 1797 states and 4837 transitions. [2021-06-05 21:02:38,388 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:38,388 INFO L276 IsEmpty]: Start isEmpty. Operand 1797 states and 4837 transitions. [2021-06-05 21:02:38,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 21:02:38,391 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:02:38,391 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:02:38,614 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-05 21:02:38,614 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:02:38,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:02:38,614 INFO L82 PathProgramCache]: Analyzing trace with hash -877014541, now seen corresponding path program 16 times [2021-06-05 21:02:38,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:02:38,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750771413] [2021-06-05 21:02:38,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:02:38,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:02:38,646 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 21:02:38,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:02:38,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750771413] [2021-06-05 21:02:38,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750771413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:02:38,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783909408] [2021-06-05 21:02:38,647 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:02:38,674 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:02:38,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:02:38,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:02:38,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:02:38,742 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 21:02:38,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783909408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:02:38,742 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:02:38,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-05 21:02:38,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929173532] [2021-06-05 21:02:38,743 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 21:02:38,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:02:38,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 21:02:38,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 21:02:38,744 INFO L87 Difference]: Start difference. First operand 1797 states and 4837 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:38,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:02:38,818 INFO L93 Difference]: Finished difference Result 2099 states and 5565 transitions. [2021-06-05 21:02:38,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 21:02:38,818 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 21:02:38,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:02:38,825 INFO L225 Difference]: With dead ends: 2099 [2021-06-05 21:02:38,825 INFO L226 Difference]: Without dead ends: 2092 [2021-06-05 21:02:38,825 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.9ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 21:02:38,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2092 states. [2021-06-05 21:02:38,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2092 to 1863. [2021-06-05 21:02:38,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1863 states, 1862 states have (on average 2.700859291084855) internal successors, (5029), 1862 states have internal predecessors, (5029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:38,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1863 states to 1863 states and 5029 transitions. [2021-06-05 21:02:38,866 INFO L78 Accepts]: Start accepts. Automaton has 1863 states and 5029 transitions. Word has length 23 [2021-06-05 21:02:38,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:02:38,866 INFO L482 AbstractCegarLoop]: Abstraction has 1863 states and 5029 transitions. [2021-06-05 21:02:38,866 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:38,866 INFO L276 IsEmpty]: Start isEmpty. Operand 1863 states and 5029 transitions. [2021-06-05 21:02:38,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 21:02:38,869 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:02:38,869 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:02:39,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-05 21:02:39,093 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:02:39,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:02:39,093 INFO L82 PathProgramCache]: Analyzing trace with hash 1516662741, now seen corresponding path program 1 times [2021-06-05 21:02:39,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:02:39,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519472170] [2021-06-05 21:02:39,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:02:39,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:02:39,145 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:02:39,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:02:39,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519472170] [2021-06-05 21:02:39,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519472170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:02:39,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415775514] [2021-06-05 21:02:39,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:02:39,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:02:39,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:02:39,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:02:39,252 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:02:39,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415775514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:02:39,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:02:39,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-06-05 21:02:39,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434104005] [2021-06-05 21:02:39,252 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:02:39,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:02:39,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:02:39,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:02:39,253 INFO L87 Difference]: Start difference. First operand 1863 states and 5029 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:39,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:02:39,404 INFO L93 Difference]: Finished difference Result 1530 states and 4049 transitions. [2021-06-05 21:02:39,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:02:39,405 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 21:02:39,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:02:39,408 INFO L225 Difference]: With dead ends: 1530 [2021-06-05 21:02:39,408 INFO L226 Difference]: Without dead ends: 1391 [2021-06-05 21:02:39,409 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 91.0ms TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:02:39,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1391 states. [2021-06-05 21:02:39,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1391 to 1357. [2021-06-05 21:02:39,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1357 states, 1356 states have (on average 2.7109144542772863) internal successors, (3676), 1356 states have internal predecessors, (3676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:39,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1357 states to 1357 states and 3676 transitions. [2021-06-05 21:02:39,435 INFO L78 Accepts]: Start accepts. Automaton has 1357 states and 3676 transitions. Word has length 23 [2021-06-05 21:02:39,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:02:39,435 INFO L482 AbstractCegarLoop]: Abstraction has 1357 states and 3676 transitions. [2021-06-05 21:02:39,435 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:39,435 INFO L276 IsEmpty]: Start isEmpty. Operand 1357 states and 3676 transitions. [2021-06-05 21:02:39,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 21:02:39,438 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:02:39,438 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:02:39,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-05 21:02:39,653 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:02:39,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:02:39,653 INFO L82 PathProgramCache]: Analyzing trace with hash 2072587809, now seen corresponding path program 2 times [2021-06-05 21:02:39,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:02:39,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788529672] [2021-06-05 21:02:39,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:02:39,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:02:39,714 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:02:39,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:02:39,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788529672] [2021-06-05 21:02:39,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788529672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:02:39,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328164039] [2021-06-05 21:02:39,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:02:39,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:02:39,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:02:39,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:02:39,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:02:39,813 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:02:39,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328164039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:02:39,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:02:39,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-06-05 21:02:39,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559934942] [2021-06-05 21:02:39,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:02:39,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:02:39,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:02:39,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:02:39,815 INFO L87 Difference]: Start difference. First operand 1357 states and 3676 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:39,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:02:39,976 INFO L93 Difference]: Finished difference Result 1538 states and 4021 transitions. [2021-06-05 21:02:39,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:02:39,977 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 21:02:39,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:02:39,980 INFO L225 Difference]: With dead ends: 1538 [2021-06-05 21:02:39,980 INFO L226 Difference]: Without dead ends: 1538 [2021-06-05 21:02:39,980 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 93.8ms TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:02:39,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1538 states. [2021-06-05 21:02:40,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1538 to 1383. [2021-06-05 21:02:40,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1383 states, 1382 states have (on average 2.703328509406657) internal successors, (3736), 1382 states have internal predecessors, (3736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:40,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1383 states to 1383 states and 3736 transitions. [2021-06-05 21:02:40,006 INFO L78 Accepts]: Start accepts. Automaton has 1383 states and 3736 transitions. Word has length 23 [2021-06-05 21:02:40,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:02:40,006 INFO L482 AbstractCegarLoop]: Abstraction has 1383 states and 3736 transitions. [2021-06-05 21:02:40,006 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:40,006 INFO L276 IsEmpty]: Start isEmpty. Operand 1383 states and 3736 transitions. [2021-06-05 21:02:40,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 21:02:40,008 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:02:40,008 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:02:40,231 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-05 21:02:40,232 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:02:40,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:02:40,232 INFO L82 PathProgramCache]: Analyzing trace with hash 1575503784, now seen corresponding path program 2 times [2021-06-05 21:02:40,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:02:40,232 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664607425] [2021-06-05 21:02:40,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:02:40,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:02:40,272 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:02:40,272 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:02:40,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664607425] [2021-06-05 21:02:40,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664607425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:02:40,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430650366] [2021-06-05 21:02:40,272 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 [2021-06-05 21:02:40,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:02:40,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:02:40,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 21:02:40,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:02:40,355 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:02:40,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430650366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:02:40,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:02:40,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 7 [2021-06-05 21:02:40,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449983210] [2021-06-05 21:02:40,355 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:02:40,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:02:40,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:02:40,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:02:40,356 INFO L87 Difference]: Start difference. First operand 1383 states and 3736 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:40,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:02:40,467 INFO L93 Difference]: Finished difference Result 1546 states and 4028 transitions. [2021-06-05 21:02:40,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:02:40,467 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 21:02:40,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:02:40,471 INFO L225 Difference]: With dead ends: 1546 [2021-06-05 21:02:40,471 INFO L226 Difference]: Without dead ends: 1526 [2021-06-05 21:02:40,471 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 51.2ms TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:02:40,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1526 states. [2021-06-05 21:02:40,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1526 to 1395. [2021-06-05 21:02:40,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1395 states, 1394 states have (on average 2.6886657101865135) internal successors, (3748), 1394 states have internal predecessors, (3748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:40,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1395 states to 1395 states and 3748 transitions. [2021-06-05 21:02:40,520 INFO L78 Accepts]: Start accepts. Automaton has 1395 states and 3748 transitions. Word has length 23 [2021-06-05 21:02:40,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:02:40,521 INFO L482 AbstractCegarLoop]: Abstraction has 1395 states and 3748 transitions. [2021-06-05 21:02:40,521 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:40,521 INFO L276 IsEmpty]: Start isEmpty. Operand 1395 states and 3748 transitions. [2021-06-05 21:02:40,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 21:02:40,523 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:02:40,523 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:02:40,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:02:40,737 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:02:40,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:02:40,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1556804075, now seen corresponding path program 3 times [2021-06-05 21:02:40,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:02:40,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105500284] [2021-06-05 21:02:40,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:02:40,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:02:40,787 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:02:40,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:02:40,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105500284] [2021-06-05 21:02:40,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105500284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:02:40,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186188013] [2021-06-05 21:02:40,788 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 [2021-06-05 21:02:40,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:02:40,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:02:40,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:02:40,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:02:40,893 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:02:40,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186188013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:02:40,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:02:40,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-06-05 21:02:40,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198929553] [2021-06-05 21:02:40,894 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:02:40,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:02:40,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:02:40,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:02:40,895 INFO L87 Difference]: Start difference. First operand 1395 states and 3748 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:41,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:02:41,132 INFO L93 Difference]: Finished difference Result 1913 states and 4928 transitions. [2021-06-05 21:02:41,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:02:41,133 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 21:02:41,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:02:41,137 INFO L225 Difference]: With dead ends: 1913 [2021-06-05 21:02:41,137 INFO L226 Difference]: Without dead ends: 1913 [2021-06-05 21:02:41,137 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 96.6ms TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:02:41,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1913 states. [2021-06-05 21:02:41,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1913 to 1544. [2021-06-05 21:02:41,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1544 states, 1543 states have (on average 2.6824368114063515) internal successors, (4139), 1543 states have internal predecessors, (4139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:41,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 4139 transitions. [2021-06-05 21:02:41,166 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 4139 transitions. Word has length 23 [2021-06-05 21:02:41,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:02:41,166 INFO L482 AbstractCegarLoop]: Abstraction has 1544 states and 4139 transitions. [2021-06-05 21:02:41,166 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:41,166 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 4139 transitions. [2021-06-05 21:02:41,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 21:02:41,169 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:02:41,169 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:02:41,391 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:02:41,391 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:02:41,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:02:41,392 INFO L82 PathProgramCache]: Analyzing trace with hash -56471083, now seen corresponding path program 3 times [2021-06-05 21:02:41,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:02:41,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598505521] [2021-06-05 21:02:41,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:02:41,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:02:41,437 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:02:41,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:02:41,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598505521] [2021-06-05 21:02:41,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598505521] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:02:41,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:02:41,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 21:02:41,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749883032] [2021-06-05 21:02:41,437 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 21:02:41,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:02:41,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 21:02:41,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 21:02:41,438 INFO L87 Difference]: Start difference. First operand 1544 states and 4139 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:41,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:02:41,488 INFO L93 Difference]: Finished difference Result 1492 states and 3879 transitions. [2021-06-05 21:02:41,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 21:02:41,489 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 21:02:41,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:02:41,492 INFO L225 Difference]: With dead ends: 1492 [2021-06-05 21:02:41,492 INFO L226 Difference]: Without dead ends: 1411 [2021-06-05 21:02:41,492 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.0ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 21:02:41,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1411 states. [2021-06-05 21:02:41,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1411 to 1381. [2021-06-05 21:02:41,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1381 states, 1380 states have (on average 2.6231884057971016) internal successors, (3620), 1380 states have internal predecessors, (3620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:41,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1381 states to 1381 states and 3620 transitions. [2021-06-05 21:02:41,515 INFO L78 Accepts]: Start accepts. Automaton has 1381 states and 3620 transitions. Word has length 23 [2021-06-05 21:02:41,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:02:41,515 INFO L482 AbstractCegarLoop]: Abstraction has 1381 states and 3620 transitions. [2021-06-05 21:02:41,515 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:41,515 INFO L276 IsEmpty]: Start isEmpty. Operand 1381 states and 3620 transitions. [2021-06-05 21:02:41,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 21:02:41,517 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:02:41,517 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:02:41,517 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-06-05 21:02:41,518 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:02:41,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:02:41,518 INFO L82 PathProgramCache]: Analyzing trace with hash -670007263, now seen corresponding path program 4 times [2021-06-05 21:02:41,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:02:41,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179603401] [2021-06-05 21:02:41,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:02:41,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:02:41,564 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:02:41,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:02:41,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179603401] [2021-06-05 21:02:41,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179603401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:02:41,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953180719] [2021-06-05 21:02:41,565 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 [2021-06-05 21:02:41,596 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:02:41,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:02:41,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:02:41,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:02:41,650 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:02:41,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953180719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:02:41,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:02:41,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-06-05 21:02:41,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797929370] [2021-06-05 21:02:41,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:02:41,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:02:41,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:02:41,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:02:41,652 INFO L87 Difference]: Start difference. First operand 1381 states and 3620 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:41,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:02:41,872 INFO L93 Difference]: Finished difference Result 1624 states and 4116 transitions. [2021-06-05 21:02:41,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:02:41,872 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 21:02:41,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:02:41,875 INFO L225 Difference]: With dead ends: 1624 [2021-06-05 21:02:41,875 INFO L226 Difference]: Without dead ends: 1612 [2021-06-05 21:02:41,876 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 102.5ms TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:02:41,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1612 states. [2021-06-05 21:02:41,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1612 to 1413. [2021-06-05 21:02:41,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1413 states, 1412 states have (on average 2.6203966005665724) internal successors, (3700), 1412 states have internal predecessors, (3700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:41,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1413 states to 1413 states and 3700 transitions. [2021-06-05 21:02:41,898 INFO L78 Accepts]: Start accepts. Automaton has 1413 states and 3700 transitions. Word has length 23 [2021-06-05 21:02:41,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:02:41,898 INFO L482 AbstractCegarLoop]: Abstraction has 1413 states and 3700 transitions. [2021-06-05 21:02:41,899 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:41,899 INFO L276 IsEmpty]: Start isEmpty. Operand 1413 states and 3700 transitions. [2021-06-05 21:02:41,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 21:02:41,901 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:02:41,901 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:02:42,123 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-06-05 21:02:42,124 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:02:42,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:02:42,124 INFO L82 PathProgramCache]: Analyzing trace with hash -819089257, now seen corresponding path program 17 times [2021-06-05 21:02:42,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:02:42,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131087125] [2021-06-05 21:02:42,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:02:42,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:02:42,156 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:02:42,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:02:42,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131087125] [2021-06-05 21:02:42,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131087125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:02:42,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218404559] [2021-06-05 21:02:42,157 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 21:02:42,193 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:02:42,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:02:42,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:02:42,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:02:42,314 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:02:42,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218404559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:02:42,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:02:42,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 9] total 11 [2021-06-05 21:02:42,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123398810] [2021-06-05 21:02:42,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:02:42,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:02:42,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:02:42,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:02:42,316 INFO L87 Difference]: Start difference. First operand 1413 states and 3700 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:42,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:02:42,836 INFO L93 Difference]: Finished difference Result 2940 states and 7390 transitions. [2021-06-05 21:02:42,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:02:42,836 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 21:02:42,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:02:42,841 INFO L225 Difference]: With dead ends: 2940 [2021-06-05 21:02:42,841 INFO L226 Difference]: Without dead ends: 2926 [2021-06-05 21:02:42,842 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 275.0ms TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:02:42,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2926 states. [2021-06-05 21:02:42,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2926 to 1583. [2021-06-05 21:02:42,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1583 states, 1582 states have (on average 2.618204804045512) internal successors, (4142), 1582 states have internal predecessors, (4142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:42,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1583 states to 1583 states and 4142 transitions. [2021-06-05 21:02:42,875 INFO L78 Accepts]: Start accepts. Automaton has 1583 states and 4142 transitions. Word has length 23 [2021-06-05 21:02:42,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:02:42,875 INFO L482 AbstractCegarLoop]: Abstraction has 1583 states and 4142 transitions. [2021-06-05 21:02:42,875 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:42,875 INFO L276 IsEmpty]: Start isEmpty. Operand 1583 states and 4142 transitions. [2021-06-05 21:02:42,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 21:02:42,877 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:02:42,877 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:02:43,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:02:43,100 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:02:43,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:02:43,100 INFO L82 PathProgramCache]: Analyzing trace with hash 1471910071, now seen corresponding path program 5 times [2021-06-05 21:02:43,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:02:43,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717729004] [2021-06-05 21:02:43,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:02:43,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:02:43,143 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:02:43,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:02:43,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717729004] [2021-06-05 21:02:43,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717729004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:02:43,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526741239] [2021-06-05 21:02:43,143 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:02:43,174 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:02:43,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:02:43,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:02:43,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:02:43,238 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:02:43,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526741239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:02:43,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:02:43,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-05 21:02:43,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583427042] [2021-06-05 21:02:43,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:02:43,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:02:43,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:02:43,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:02:43,239 INFO L87 Difference]: Start difference. First operand 1583 states and 4142 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:43,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:02:43,491 INFO L93 Difference]: Finished difference Result 1758 states and 4409 transitions. [2021-06-05 21:02:43,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:02:43,491 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 21:02:43,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:02:43,494 INFO L225 Difference]: With dead ends: 1758 [2021-06-05 21:02:43,495 INFO L226 Difference]: Without dead ends: 1746 [2021-06-05 21:02:43,495 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 152.2ms TimeCoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:02:43,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1746 states. [2021-06-05 21:02:43,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1746 to 1437. [2021-06-05 21:02:43,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1437 states, 1436 states have (on average 2.597493036211699) internal successors, (3730), 1436 states have internal predecessors, (3730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:43,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1437 states to 1437 states and 3730 transitions. [2021-06-05 21:02:43,518 INFO L78 Accepts]: Start accepts. Automaton has 1437 states and 3730 transitions. Word has length 23 [2021-06-05 21:02:43,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:02:43,518 INFO L482 AbstractCegarLoop]: Abstraction has 1437 states and 3730 transitions. [2021-06-05 21:02:43,519 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:43,519 INFO L276 IsEmpty]: Start isEmpty. Operand 1437 states and 3730 transitions. [2021-06-05 21:02:43,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 21:02:43,520 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:02:43,521 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:02:43,743 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-06-05 21:02:43,744 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:02:43,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:02:43,744 INFO L82 PathProgramCache]: Analyzing trace with hash -1618050889, now seen corresponding path program 4 times [2021-06-05 21:02:43,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:02:43,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286698288] [2021-06-05 21:02:43,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:02:43,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:02:43,805 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:02:43,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:02:43,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286698288] [2021-06-05 21:02:43,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286698288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:02:43,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549946513] [2021-06-05 21:02:43,806 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:02:43,835 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:02:43,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:02:43,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:02:43,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:02:43,907 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:02:43,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549946513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:02:43,907 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:02:43,907 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-06-05 21:02:43,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583258116] [2021-06-05 21:02:43,908 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:02:43,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:02:43,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:02:43,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:02:43,908 INFO L87 Difference]: Start difference. First operand 1437 states and 3730 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:44,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:02:44,037 INFO L93 Difference]: Finished difference Result 1432 states and 3672 transitions. [2021-06-05 21:02:44,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:02:44,038 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 21:02:44,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:02:44,041 INFO L225 Difference]: With dead ends: 1432 [2021-06-05 21:02:44,041 INFO L226 Difference]: Without dead ends: 1365 [2021-06-05 21:02:44,041 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 100.5ms TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:02:44,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1365 states. [2021-06-05 21:02:44,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1365 to 1356. [2021-06-05 21:02:44,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1356 states, 1355 states have (on average 2.607380073800738) internal successors, (3533), 1355 states have internal predecessors, (3533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:44,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1356 states to 1356 states and 3533 transitions. [2021-06-05 21:02:44,060 INFO L78 Accepts]: Start accepts. Automaton has 1356 states and 3533 transitions. Word has length 23 [2021-06-05 21:02:44,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:02:44,060 INFO L482 AbstractCegarLoop]: Abstraction has 1356 states and 3533 transitions. [2021-06-05 21:02:44,060 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:44,060 INFO L276 IsEmpty]: Start isEmpty. Operand 1356 states and 3533 transitions. [2021-06-05 21:02:44,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 21:02:44,062 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:02:44,062 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:02:44,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:02:44,284 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:02:44,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:02:44,284 INFO L82 PathProgramCache]: Analyzing trace with hash 2131794949, now seen corresponding path program 18 times [2021-06-05 21:02:44,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:02:44,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490916277] [2021-06-05 21:02:44,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:02:44,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:02:44,347 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:02:44,347 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:02:44,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490916277] [2021-06-05 21:02:44,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490916277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:02:44,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691822011] [2021-06-05 21:02:44,347 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:02:44,373 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:02:44,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:02:44,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:02:44,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:02:44,425 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:02:44,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691822011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:02:44,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:02:44,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 21:02:44,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033855979] [2021-06-05 21:02:44,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:02:44,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:02:44,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:02:44,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:02:44,427 INFO L87 Difference]: Start difference. First operand 1356 states and 3533 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:44,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:02:44,595 INFO L93 Difference]: Finished difference Result 1715 states and 4244 transitions. [2021-06-05 21:02:44,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:02:44,595 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 21:02:44,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:02:44,599 INFO L225 Difference]: With dead ends: 1715 [2021-06-05 21:02:44,599 INFO L226 Difference]: Without dead ends: 1715 [2021-06-05 21:02:44,599 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 96.7ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:02:44,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1715 states. [2021-06-05 21:02:44,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1715 to 1404. [2021-06-05 21:02:44,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1404 states, 1403 states have (on average 2.6129722024233786) internal successors, (3666), 1403 states have internal predecessors, (3666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:44,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1404 states to 1404 states and 3666 transitions. [2021-06-05 21:02:44,622 INFO L78 Accepts]: Start accepts. Automaton has 1404 states and 3666 transitions. Word has length 26 [2021-06-05 21:02:44,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:02:44,622 INFO L482 AbstractCegarLoop]: Abstraction has 1404 states and 3666 transitions. [2021-06-05 21:02:44,622 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:44,622 INFO L276 IsEmpty]: Start isEmpty. Operand 1404 states and 3666 transitions. [2021-06-05 21:02:44,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 21:02:44,624 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:02:44,624 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:02:44,843 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-06-05 21:02:44,843 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:02:44,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:02:44,843 INFO L82 PathProgramCache]: Analyzing trace with hash 761307032, now seen corresponding path program 19 times [2021-06-05 21:02:44,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:02:44,844 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879536581] [2021-06-05 21:02:44,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:02:44,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:02:44,895 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:02:44,895 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:02:44,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879536581] [2021-06-05 21:02:44,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879536581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:02:44,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578584739] [2021-06-05 21:02:44,896 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:02:44,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:02:44,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:02:44,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:02:44,986 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:02:44,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578584739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:02:44,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:02:44,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 7 [2021-06-05 21:02:44,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415894262] [2021-06-05 21:02:44,987 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:02:44,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:02:44,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:02:44,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:02:44,988 INFO L87 Difference]: Start difference. First operand 1404 states and 3666 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:45,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:02:45,092 INFO L93 Difference]: Finished difference Result 2473 states and 6334 transitions. [2021-06-05 21:02:45,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 21:02:45,092 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 21:02:45,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:02:45,095 INFO L225 Difference]: With dead ends: 2473 [2021-06-05 21:02:45,095 INFO L226 Difference]: Without dead ends: 2455 [2021-06-05 21:02:45,095 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 51.8ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:02:45,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2455 states. [2021-06-05 21:02:45,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2455 to 2018. [2021-06-05 21:02:45,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2018 states, 2017 states have (on average 2.707982151710461) internal successors, (5462), 2017 states have internal predecessors, (5462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:45,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2018 states to 2018 states and 5462 transitions. [2021-06-05 21:02:45,128 INFO L78 Accepts]: Start accepts. Automaton has 2018 states and 5462 transitions. Word has length 26 [2021-06-05 21:02:45,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:02:45,129 INFO L482 AbstractCegarLoop]: Abstraction has 2018 states and 5462 transitions. [2021-06-05 21:02:45,129 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:45,129 INFO L276 IsEmpty]: Start isEmpty. Operand 2018 states and 5462 transitions. [2021-06-05 21:02:45,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 21:02:45,132 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:02:45,132 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:02:45,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:02:45,345 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:02:45,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:02:45,345 INFO L82 PathProgramCache]: Analyzing trace with hash -195885608, now seen corresponding path program 20 times [2021-06-05 21:02:45,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:02:45,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907757068] [2021-06-05 21:02:45,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:02:45,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:02:45,376 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:02:45,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:02:45,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907757068] [2021-06-05 21:02:45,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907757068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:02:45,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160893524] [2021-06-05 21:02:45,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 21:02:45,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:02:45,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:02:45,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:02:45,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:02:45,453 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:02:45,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160893524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:02:45,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:02:45,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 6 [2021-06-05 21:02:45,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885995593] [2021-06-05 21:02:45,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:02:45,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:02:45,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:02:45,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:02:45,455 INFO L87 Difference]: Start difference. First operand 2018 states and 5462 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:45,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:02:45,580 INFO L93 Difference]: Finished difference Result 2447 states and 6260 transitions. [2021-06-05 21:02:45,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:02:45,580 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 21:02:45,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:02:45,582 INFO L225 Difference]: With dead ends: 2447 [2021-06-05 21:02:45,583 INFO L226 Difference]: Without dead ends: 2447 [2021-06-05 21:02:45,583 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 54.2ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:02:45,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2447 states. [2021-06-05 21:02:45,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2447 to 1914. [2021-06-05 21:02:45,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1914 states, 1913 states have (on average 2.6905384213277577) internal successors, (5147), 1913 states have internal predecessors, (5147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:45,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1914 states to 1914 states and 5147 transitions. [2021-06-05 21:02:45,616 INFO L78 Accepts]: Start accepts. Automaton has 1914 states and 5147 transitions. Word has length 26 [2021-06-05 21:02:45,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:02:45,616 INFO L482 AbstractCegarLoop]: Abstraction has 1914 states and 5147 transitions. [2021-06-05 21:02:45,616 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:45,616 INFO L276 IsEmpty]: Start isEmpty. Operand 1914 states and 5147 transitions. [2021-06-05 21:02:45,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 21:02:45,619 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:02:45,619 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:02:45,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-06-05 21:02:45,842 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:02:45,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:02:45,842 INFO L82 PathProgramCache]: Analyzing trace with hash -1127702055, now seen corresponding path program 21 times [2021-06-05 21:02:45,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:02:45,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800017570] [2021-06-05 21:02:45,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:02:45,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:02:45,880 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:02:45,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:02:45,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800017570] [2021-06-05 21:02:45,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800017570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:02:45,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914182606] [2021-06-05 21:02:45,881 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:02:45,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:02:45,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:02:45,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:02:45,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:02:45,967 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:02:45,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914182606] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:02:45,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:02:45,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 21:02:45,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336003089] [2021-06-05 21:02:45,970 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 21:02:45,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:02:45,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 21:02:45,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 21:02:45,971 INFO L87 Difference]: Start difference. First operand 1914 states and 5147 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:46,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:02:46,056 INFO L93 Difference]: Finished difference Result 2092 states and 5497 transitions. [2021-06-05 21:02:46,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:02:46,056 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 [2021-06-05 21:02:46,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:02:46,059 INFO L225 Difference]: With dead ends: 2092 [2021-06-05 21:02:46,059 INFO L226 Difference]: Without dead ends: 2089 [2021-06-05 21:02:46,059 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 36.6ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:02:46,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2089 states. [2021-06-05 21:02:46,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2089 to 1899. [2021-06-05 21:02:46,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1899 states, 1898 states have (on average 2.684931506849315) internal successors, (5096), 1898 states have internal predecessors, (5096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:46,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1899 states to 1899 states and 5096 transitions. [2021-06-05 21:02:46,088 INFO L78 Accepts]: Start accepts. Automaton has 1899 states and 5096 transitions. Word has length 26 [2021-06-05 21:02:46,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:02:46,088 INFO L482 AbstractCegarLoop]: Abstraction has 1899 states and 5096 transitions. [2021-06-05 21:02:46,088 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) [2021-06-05 21:02:46,088 INFO L276 IsEmpty]: Start isEmpty. Operand 1899 states and 5096 transitions. [2021-06-05 21:02:46,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 21:02:46,091 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:02:46,091 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:02:46,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:02:46,301 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:02:46,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:02:46,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1111998297, now seen corresponding path program 22 times [2021-06-05 21:02:46,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:02:46,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051636535] [2021-06-05 21:02:46,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:02:46,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:02:46,335 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:02:46,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:02:46,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051636535] [2021-06-05 21:02:46,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051636535] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:02:46,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978189380] [2021-06-05 21:02:46,336 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:02:46,375 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:02:46,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:02:46,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:02:46,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:02:46,425 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:02:46,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978189380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:02:46,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:02:46,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 21:02:46,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346540215] [2021-06-05 21:02:46,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 21:02:46,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:02:46,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 21:02:46,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 21:02:46,426 INFO L87 Difference]: Start difference. First operand 1899 states and 5096 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:46,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:02:46,552 INFO L93 Difference]: Finished difference Result 2552 states and 6599 transitions. [2021-06-05 21:02:46,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:02:46,552 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 21:02:46,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:02:46,555 INFO L225 Difference]: With dead ends: 2552 [2021-06-05 21:02:46,556 INFO L226 Difference]: Without dead ends: 2552 [2021-06-05 21:02:46,556 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 46.2ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:02:46,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2552 states. [2021-06-05 21:02:46,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2552 to 2092. [2021-06-05 21:02:46,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2092 states, 2091 states have (on average 2.713534194165471) internal successors, (5674), 2091 states have internal predecessors, (5674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:46,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2092 states to 2092 states and 5674 transitions. [2021-06-05 21:02:46,589 INFO L78 Accepts]: Start accepts. Automaton has 2092 states and 5674 transitions. Word has length 26 [2021-06-05 21:02:46,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:02:46,589 INFO L482 AbstractCegarLoop]: Abstraction has 2092 states and 5674 transitions. [2021-06-05 21:02:46,589 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:46,589 INFO L276 IsEmpty]: Start isEmpty. Operand 2092 states and 5674 transitions. [2021-06-05 21:02:46,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 21:02:46,592 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:02:46,592 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:02:46,809 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-06-05 21:02:46,809 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:02:46,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:02:46,810 INFO L82 PathProgramCache]: Analyzing trace with hash -1689374502, now seen corresponding path program 23 times [2021-06-05 21:02:46,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:02:46,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617973758] [2021-06-05 21:02:46,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:02:46,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:02:46,849 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:02:46,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:02:46,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617973758] [2021-06-05 21:02:46,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617973758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:02:46,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96904003] [2021-06-05 21:02:46,849 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:02:46,879 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:02:46,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:02:46,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:02:46,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:02:46,930 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:02:46,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96904003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:02:46,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:02:46,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 7 [2021-06-05 21:02:46,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606242714] [2021-06-05 21:02:46,931 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:02:46,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:02:46,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:02:46,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:02:46,932 INFO L87 Difference]: Start difference. First operand 2092 states and 5674 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:47,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:02:47,038 INFO L93 Difference]: Finished difference Result 3728 states and 10027 transitions. [2021-06-05 21:02:47,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:02:47,039 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 21:02:47,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:02:47,044 INFO L225 Difference]: With dead ends: 3728 [2021-06-05 21:02:47,044 INFO L226 Difference]: Without dead ends: 3712 [2021-06-05 21:02:47,044 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 43.5ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:02:47,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3712 states. [2021-06-05 21:02:47,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3712 to 3201. [2021-06-05 21:02:47,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3201 states, 3200 states have (on average 2.8134375) internal successors, (9003), 3200 states have internal predecessors, (9003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:47,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3201 states to 3201 states and 9003 transitions. [2021-06-05 21:02:47,103 INFO L78 Accepts]: Start accepts. Automaton has 3201 states and 9003 transitions. Word has length 26 [2021-06-05 21:02:47,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:02:47,103 INFO L482 AbstractCegarLoop]: Abstraction has 3201 states and 9003 transitions. [2021-06-05 21:02:47,104 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:47,104 INFO L276 IsEmpty]: Start isEmpty. Operand 3201 states and 9003 transitions. [2021-06-05 21:02:47,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 21:02:47,107 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:02:47,107 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:02:47,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-06-05 21:02:47,329 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:02:47,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:02:47,329 INFO L82 PathProgramCache]: Analyzing trace with hash 1983712384, now seen corresponding path program 24 times [2021-06-05 21:02:47,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:02:47,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910045754] [2021-06-05 21:02:47,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:02:47,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:02:47,379 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:02:47,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:02:47,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910045754] [2021-06-05 21:02:47,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910045754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:02:47,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389628850] [2021-06-05 21:02:47,379 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:02:47,419 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:02:47,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:02:47,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:02:47,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:02:47,474 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:02:47,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389628850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:02:47,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:02:47,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 7 [2021-06-05 21:02:47,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001507772] [2021-06-05 21:02:47,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:02:47,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:02:47,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:02:47,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:02:47,475 INFO L87 Difference]: Start difference. First operand 3201 states and 9003 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:47,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:02:47,610 INFO L93 Difference]: Finished difference Result 3830 states and 10240 transitions. [2021-06-05 21:02:47,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:02:47,611 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 21:02:47,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:02:47,615 INFO L225 Difference]: With dead ends: 3830 [2021-06-05 21:02:47,615 INFO L226 Difference]: Without dead ends: 3830 [2021-06-05 21:02:47,615 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 57.1ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:02:47,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3830 states. [2021-06-05 21:02:47,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3830 to 3216. [2021-06-05 21:02:47,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3216 states, 3215 states have (on average 2.805909797822706) internal successors, (9021), 3215 states have internal predecessors, (9021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:47,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3216 states to 3216 states and 9021 transitions. [2021-06-05 21:02:47,662 INFO L78 Accepts]: Start accepts. Automaton has 3216 states and 9021 transitions. Word has length 26 [2021-06-05 21:02:47,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:02:47,662 INFO L482 AbstractCegarLoop]: Abstraction has 3216 states and 9021 transitions. [2021-06-05 21:02:47,662 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:47,662 INFO L276 IsEmpty]: Start isEmpty. Operand 3216 states and 9021 transitions. [2021-06-05 21:02:47,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 21:02:47,665 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:02:47,666 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:02:47,887 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:02:47,887 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:02:47,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:02:47,887 INFO L82 PathProgramCache]: Analyzing trace with hash 1051895937, now seen corresponding path program 25 times [2021-06-05 21:02:47,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:02:47,888 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086121140] [2021-06-05 21:02:47,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:02:47,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:02:47,929 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:02:47,929 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:02:47,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086121140] [2021-06-05 21:02:47,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086121140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:02:47,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399144353] [2021-06-05 21:02:47,930 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:02:47,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:02:47,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:02:47,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:02:48,019 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:02:48,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399144353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:02:48,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:02:48,020 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 21:02:48,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601528767] [2021-06-05 21:02:48,020 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 21:02:48,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:02:48,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 21:02:48,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 21:02:48,020 INFO L87 Difference]: Start difference. First operand 3216 states and 9021 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:48,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:02:48,119 INFO L93 Difference]: Finished difference Result 3629 states and 9839 transitions. [2021-06-05 21:02:48,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:02:48,120 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 21:02:48,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:02:48,126 INFO L225 Difference]: With dead ends: 3629 [2021-06-05 21:02:48,126 INFO L226 Difference]: Without dead ends: 3617 [2021-06-05 21:02:48,126 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 40.3ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:02:48,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3617 states. [2021-06-05 21:02:48,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3617 to 3079. [2021-06-05 21:02:48,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3079 states, 3078 states have (on average 2.7979207277452893) internal successors, (8612), 3078 states have internal predecessors, (8612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:48,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3079 states to 3079 states and 8612 transitions. [2021-06-05 21:02:48,187 INFO L78 Accepts]: Start accepts. Automaton has 3079 states and 8612 transitions. Word has length 26 [2021-06-05 21:02:48,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:02:48,187 INFO L482 AbstractCegarLoop]: Abstraction has 3079 states and 8612 transitions. [2021-06-05 21:02:48,188 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:48,188 INFO L276 IsEmpty]: Start isEmpty. Operand 3079 states and 8612 transitions. [2021-06-05 21:02:48,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 21:02:48,190 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:02:48,190 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:02:48,391 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-06-05 21:02:48,391 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:02:48,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:02:48,391 INFO L82 PathProgramCache]: Analyzing trace with hash 346139928, now seen corresponding path program 26 times [2021-06-05 21:02:48,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:02:48,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279744142] [2021-06-05 21:02:48,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:02:48,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:02:48,434 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:02:48,435 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:02:48,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279744142] [2021-06-05 21:02:48,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279744142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:02:48,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977154305] [2021-06-05 21:02:48,435 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:02:48,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:02:48,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:02:48,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:02:48,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:02:48,511 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:02:48,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977154305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:02:48,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:02:48,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 7 [2021-06-05 21:02:48,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626254415] [2021-06-05 21:02:48,512 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:02:48,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:02:48,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:02:48,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:02:48,513 INFO L87 Difference]: Start difference. First operand 3079 states and 8612 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:48,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:02:48,678 INFO L93 Difference]: Finished difference Result 4208 states and 11364 transitions. [2021-06-05 21:02:48,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:02:48,678 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 21:02:48,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:02:48,684 INFO L225 Difference]: With dead ends: 4208 [2021-06-05 21:02:48,684 INFO L226 Difference]: Without dead ends: 4208 [2021-06-05 21:02:48,684 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 67.5ms TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:02:48,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4208 states. [2021-06-05 21:02:48,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4208 to 3506. [2021-06-05 21:02:48,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3506 states, 3505 states have (on average 2.8185449358059915) internal successors, (9879), 3505 states have internal predecessors, (9879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:48,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3506 states to 3506 states and 9879 transitions. [2021-06-05 21:02:48,743 INFO L78 Accepts]: Start accepts. Automaton has 3506 states and 9879 transitions. Word has length 26 [2021-06-05 21:02:48,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:02:48,743 INFO L482 AbstractCegarLoop]: Abstraction has 3506 states and 9879 transitions. [2021-06-05 21:02:48,743 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:48,743 INFO L276 IsEmpty]: Start isEmpty. Operand 3506 states and 9879 transitions. [2021-06-05 21:02:48,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 21:02:48,747 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:02:48,747 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:02:48,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:02:48,961 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:02:48,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:02:48,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1258958503, now seen corresponding path program 27 times [2021-06-05 21:02:48,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:02:48,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156003613] [2021-06-05 21:02:48,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:02:48,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:02:48,998 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:02:48,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:02:48,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156003613] [2021-06-05 21:02:48,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156003613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:02:48,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495125532] [2021-06-05 21:02:48,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:02:49,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:02:49,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:02:49,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:02:49,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:02:49,065 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:02:49,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495125532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:02:49,065 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:02:49,065 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-05 21:02:49,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445000273] [2021-06-05 21:02:49,066 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:02:49,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:02:49,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:02:49,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:02:49,067 INFO L87 Difference]: Start difference. First operand 3506 states and 9879 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:49,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:02:49,177 INFO L93 Difference]: Finished difference Result 3876 states and 10634 transitions. [2021-06-05 21:02:49,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 21:02:49,177 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 21:02:49,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:02:49,182 INFO L225 Difference]: With dead ends: 3876 [2021-06-05 21:02:49,182 INFO L226 Difference]: Without dead ends: 3864 [2021-06-05 21:02:49,182 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 45.1ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:02:49,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3864 states. [2021-06-05 21:02:49,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3864 to 3527. [2021-06-05 21:02:49,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3527 states, 3526 states have (on average 2.811401020986954) internal successors, (9913), 3526 states have internal predecessors, (9913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:49,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3527 states to 3527 states and 9913 transitions. [2021-06-05 21:02:49,228 INFO L78 Accepts]: Start accepts. Automaton has 3527 states and 9913 transitions. Word has length 26 [2021-06-05 21:02:49,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:02:49,228 INFO L482 AbstractCegarLoop]: Abstraction has 3527 states and 9913 transitions. [2021-06-05 21:02:49,228 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:49,228 INFO L276 IsEmpty]: Start isEmpty. Operand 3527 states and 9913 transitions. [2021-06-05 21:02:49,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 21:02:49,230 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:02:49,230 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:02:49,431 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-06-05 21:02:49,431 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:02:49,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:02:49,431 INFO L82 PathProgramCache]: Analyzing trace with hash -1264613717, now seen corresponding path program 28 times [2021-06-05 21:02:49,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:02:49,431 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178682197] [2021-06-05 21:02:49,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:02:49,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:02:49,474 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:02:49,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:02:49,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178682197] [2021-06-05 21:02:49,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178682197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:02:49,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621738086] [2021-06-05 21:02:49,474 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:02:49,497 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:02:49,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:02:49,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:02:49,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:02:49,575 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:02:49,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621738086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:02:49,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:02:49,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-06-05 21:02:49,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521243520] [2021-06-05 21:02:49,576 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:02:49,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:02:49,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:02:49,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:02:49,576 INFO L87 Difference]: Start difference. First operand 3527 states and 9913 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:49,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:02:49,778 INFO L93 Difference]: Finished difference Result 4288 states and 11605 transitions. [2021-06-05 21:02:49,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:02:49,778 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 21:02:49,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:02:49,783 INFO L225 Difference]: With dead ends: 4288 [2021-06-05 21:02:49,783 INFO L226 Difference]: Without dead ends: 4288 [2021-06-05 21:02:49,783 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 93.5ms TimeCoverageRelationStatistics Valid=77, Invalid=105, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:02:49,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4288 states. [2021-06-05 21:02:49,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4288 to 3636. [2021-06-05 21:02:49,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3636 states, 3635 states have (on average 2.817881705639615) internal successors, (10243), 3635 states have internal predecessors, (10243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:49,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3636 states to 3636 states and 10243 transitions. [2021-06-05 21:02:49,859 INFO L78 Accepts]: Start accepts. Automaton has 3636 states and 10243 transitions. Word has length 26 [2021-06-05 21:02:49,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:02:49,859 INFO L482 AbstractCegarLoop]: Abstraction has 3636 states and 10243 transitions. [2021-06-05 21:02:49,859 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) [2021-06-05 21:02:49,860 INFO L276 IsEmpty]: Start isEmpty. Operand 3636 states and 10243 transitions. [2021-06-05 21:02:49,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 21:02:49,862 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:02:49,862 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:02:50,063 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-06-05 21:02:50,063 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:02:50,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:02:50,063 INFO L82 PathProgramCache]: Analyzing trace with hash -535116392, now seen corresponding path program 29 times [2021-06-05 21:02:50,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:02:50,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410095462] [2021-06-05 21:02:50,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:02:50,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:02:50,097 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:02:50,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:02:50,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410095462] [2021-06-05 21:02:50,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410095462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:02:50,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082972731] [2021-06-05 21:02:50,098 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:02:50,122 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:02:50,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:02:50,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:02:50,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:02:50,189 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:02:50,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082972731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:02:50,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:02:50,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 8 [2021-06-05 21:02:50,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077581603] [2021-06-05 21:02:50,190 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:02:50,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:02:50,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:02:50,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:02:50,191 INFO L87 Difference]: Start difference. First operand 3636 states and 10243 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:50,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:02:50,335 INFO L93 Difference]: Finished difference Result 4890 states and 13623 transitions. [2021-06-05 21:02:50,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:02:50,336 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 21:02:50,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:02:50,341 INFO L225 Difference]: With dead ends: 4890 [2021-06-05 21:02:50,341 INFO L226 Difference]: Without dead ends: 4858 [2021-06-05 21:02:50,342 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 58.6ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:02:50,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4858 states. [2021-06-05 21:02:50,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4858 to 4449. [2021-06-05 21:02:50,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4449 states, 4448 states have (on average 2.8424010791366907) internal successors, (12643), 4448 states have internal predecessors, (12643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:50,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4449 states to 4449 states and 12643 transitions. [2021-06-05 21:02:50,400 INFO L78 Accepts]: Start accepts. Automaton has 4449 states and 12643 transitions. Word has length 26 [2021-06-05 21:02:50,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:02:50,400 INFO L482 AbstractCegarLoop]: Abstraction has 4449 states and 12643 transitions. [2021-06-05 21:02:50,400 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:50,400 INFO L276 IsEmpty]: Start isEmpty. Operand 4449 states and 12643 transitions. [2021-06-05 21:02:50,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 21:02:50,403 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:02:50,403 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:02:50,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:02:50,605 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:02:50,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:02:50,605 INFO L82 PathProgramCache]: Analyzing trace with hash -2036715645, now seen corresponding path program 30 times [2021-06-05 21:02:50,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:02:50,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494664623] [2021-06-05 21:02:50,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:02:50,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:02:50,640 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:02:50,640 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:02:50,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494664623] [2021-06-05 21:02:50,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494664623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:02:50,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739009103] [2021-06-05 21:02:50,640 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:02:50,668 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:02:50,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:02:50,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:02:50,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:02:50,711 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:02:50,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739009103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:02:50,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:02:50,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 21:02:50,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9630155] [2021-06-05 21:02:50,712 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 21:02:50,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:02:50,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 21:02:50,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 21:02:50,712 INFO L87 Difference]: Start difference. First operand 4449 states and 12643 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:50,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:02:50,802 INFO L93 Difference]: Finished difference Result 5697 states and 15817 transitions. [2021-06-05 21:02:50,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:02:50,808 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 [2021-06-05 21:02:50,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:02:50,817 INFO L225 Difference]: With dead ends: 5697 [2021-06-05 21:02:50,817 INFO L226 Difference]: Without dead ends: 5697 [2021-06-05 21:02:50,817 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 41.9ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:02:50,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5697 states. [2021-06-05 21:02:50,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5697 to 5030. [2021-06-05 21:02:50,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5030 states, 5029 states have (on average 2.8657784847882284) internal successors, (14412), 5029 states have internal predecessors, (14412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:50,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5030 states to 5030 states and 14412 transitions. [2021-06-05 21:02:50,881 INFO L78 Accepts]: Start accepts. Automaton has 5030 states and 14412 transitions. Word has length 26 [2021-06-05 21:02:50,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:02:50,881 INFO L482 AbstractCegarLoop]: Abstraction has 5030 states and 14412 transitions. [2021-06-05 21:02:50,881 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) [2021-06-05 21:02:50,881 INFO L276 IsEmpty]: Start isEmpty. Operand 5030 states and 14412 transitions. [2021-06-05 21:02:50,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 21:02:50,884 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:02:50,884 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:02:51,085 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:02:51,085 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:02:51,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:02:51,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1680875446, now seen corresponding path program 31 times [2021-06-05 21:02:51,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:02:51,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576613693] [2021-06-05 21:02:51,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:02:51,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:02:51,115 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:02:51,115 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:02:51,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576613693] [2021-06-05 21:02:51,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576613693] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:02:51,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623751188] [2021-06-05 21:02:51,115 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:02:51,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:02:51,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:02:51,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:02:51,176 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:02:51,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623751188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:02:51,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:02:51,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 6 [2021-06-05 21:02:51,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986975739] [2021-06-05 21:02:51,176 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:02:51,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:02:51,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:02:51,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:02:51,177 INFO L87 Difference]: Start difference. First operand 5030 states and 14412 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:51,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:02:51,290 INFO L93 Difference]: Finished difference Result 6176 states and 17476 transitions. [2021-06-05 21:02:51,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:02:51,290 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 21:02:51,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:02:51,297 INFO L225 Difference]: With dead ends: 6176 [2021-06-05 21:02:51,297 INFO L226 Difference]: Without dead ends: 6160 [2021-06-05 21:02:51,297 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 42.9ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:02:51,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6160 states. [2021-06-05 21:02:51,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6160 to 5779. [2021-06-05 21:02:51,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5779 states, 5778 states have (on average 2.8816199376947043) internal successors, (16650), 5778 states have internal predecessors, (16650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:51,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5779 states to 5779 states and 16650 transitions. [2021-06-05 21:02:51,388 INFO L78 Accepts]: Start accepts. Automaton has 5779 states and 16650 transitions. Word has length 26 [2021-06-05 21:02:51,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:02:51,388 INFO L482 AbstractCegarLoop]: Abstraction has 5779 states and 16650 transitions. [2021-06-05 21:02:51,388 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:51,388 INFO L276 IsEmpty]: Start isEmpty. Operand 5779 states and 16650 transitions. [2021-06-05 21:02:51,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 21:02:51,392 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:02:51,392 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:02:51,597 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:02:51,597 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:02:51,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:02:51,598 INFO L82 PathProgramCache]: Analyzing trace with hash 1058995036, now seen corresponding path program 32 times [2021-06-05 21:02:51,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:02:51,598 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582743818] [2021-06-05 21:02:51,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:02:51,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:02:51,628 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:02:51,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:02:51,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582743818] [2021-06-05 21:02:51,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582743818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:02:51,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358924948] [2021-06-05 21:02:51,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:02:51,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:02:51,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:02:51,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:02:51,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:02:51,716 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:02:51,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358924948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:02:51,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:02:51,717 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 6 [2021-06-05 21:02:51,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178050353] [2021-06-05 21:02:51,717 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:02:51,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:02:51,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:02:51,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:02:51,717 INFO L87 Difference]: Start difference. First operand 5779 states and 16650 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:51,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:02:51,837 INFO L93 Difference]: Finished difference Result 6311 states and 17791 transitions. [2021-06-05 21:02:51,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:02:51,837 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 21:02:51,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:02:51,844 INFO L225 Difference]: With dead ends: 6311 [2021-06-05 21:02:51,845 INFO L226 Difference]: Without dead ends: 6311 [2021-06-05 21:02:51,845 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 47.4ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:02:51,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6311 states. [2021-06-05 21:02:51,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6311 to 5796. [2021-06-05 21:02:51,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5796 states, 5795 states have (on average 2.8807592752372737) internal successors, (16694), 5795 states have internal predecessors, (16694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:51,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5796 states to 5796 states and 16694 transitions. [2021-06-05 21:02:51,917 INFO L78 Accepts]: Start accepts. Automaton has 5796 states and 16694 transitions. Word has length 26 [2021-06-05 21:02:51,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:02:51,917 INFO L482 AbstractCegarLoop]: Abstraction has 5796 states and 16694 transitions. [2021-06-05 21:02:51,918 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:51,918 INFO L276 IsEmpty]: Start isEmpty. Operand 5796 states and 16694 transitions. [2021-06-05 21:02:51,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 21:02:51,920 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:02:51,920 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:02:52,121 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-06-05 21:02:52,121 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:02:52,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:02:52,121 INFO L82 PathProgramCache]: Analyzing trace with hash 127178589, now seen corresponding path program 33 times [2021-06-05 21:02:52,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:02:52,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371806280] [2021-06-05 21:02:52,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:02:52,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:02:52,151 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:02:52,152 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:02:52,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371806280] [2021-06-05 21:02:52,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371806280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:02:52,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879046377] [2021-06-05 21:02:52,152 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:02:52,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:02:52,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:02:52,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:02:52,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:02:52,228 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:02:52,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879046377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:02:52,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:02:52,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 21:02:52,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846198851] [2021-06-05 21:02:52,228 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 21:02:52,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:02:52,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 21:02:52,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 21:02:52,229 INFO L87 Difference]: Start difference. First operand 5796 states and 16694 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:52,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:02:52,311 INFO L93 Difference]: Finished difference Result 6492 states and 18169 transitions. [2021-06-05 21:02:52,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 21:02:52,312 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 [2021-06-05 21:02:52,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:02:52,322 INFO L225 Difference]: With dead ends: 6492 [2021-06-05 21:02:52,322 INFO L226 Difference]: Without dead ends: 6489 [2021-06-05 21:02:52,323 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 26.1ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:02:52,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6489 states. [2021-06-05 21:02:52,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6489 to 5795. [2021-06-05 21:02:52,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5795 states, 5794 states have (on average 2.8795305488436314) internal successors, (16684), 5794 states have internal predecessors, (16684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:52,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5795 states to 5795 states and 16684 transitions. [2021-06-05 21:02:52,437 INFO L78 Accepts]: Start accepts. Automaton has 5795 states and 16684 transitions. Word has length 26 [2021-06-05 21:02:52,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:02:52,437 INFO L482 AbstractCegarLoop]: Abstraction has 5795 states and 16684 transitions. [2021-06-05 21:02:52,437 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) [2021-06-05 21:02:52,437 INFO L276 IsEmpty]: Start isEmpty. Operand 5795 states and 16684 transitions. [2021-06-05 21:02:52,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 21:02:52,441 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:02:52,441 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:02:52,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:02:52,645 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:02:52,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:02:52,645 INFO L82 PathProgramCache]: Analyzing trace with hash -578577420, now seen corresponding path program 34 times [2021-06-05 21:02:52,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:02:52,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060774595] [2021-06-05 21:02:52,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:02:52,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:02:52,679 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:02:52,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:02:52,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060774595] [2021-06-05 21:02:52,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060774595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:02:52,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58190063] [2021-06-05 21:02:52,680 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:02:52,701 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:02:52,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:02:52,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:02:52,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:02:52,742 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:02:52,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58190063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:02:52,742 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:02:52,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 7 [2021-06-05 21:02:52,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287597746] [2021-06-05 21:02:52,743 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:02:52,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:02:52,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:02:52,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:02:52,743 INFO L87 Difference]: Start difference. First operand 5795 states and 16684 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:52,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:02:52,890 INFO L93 Difference]: Finished difference Result 6497 states and 18243 transitions. [2021-06-05 21:02:52,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:02:52,890 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 21:02:52,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:02:52,929 INFO L225 Difference]: With dead ends: 6497 [2021-06-05 21:02:52,929 INFO L226 Difference]: Without dead ends: 6497 [2021-06-05 21:02:52,929 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 65.6ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:02:52,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6497 states. [2021-06-05 21:02:52,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6497 to 5692. [2021-06-05 21:02:52,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5692 states, 5691 states have (on average 2.870848708487085) internal successors, (16338), 5691 states have internal predecessors, (16338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:52,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5692 states to 5692 states and 16338 transitions. [2021-06-05 21:02:52,992 INFO L78 Accepts]: Start accepts. Automaton has 5692 states and 16338 transitions. Word has length 26 [2021-06-05 21:02:52,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:02:52,992 INFO L482 AbstractCegarLoop]: Abstraction has 5692 states and 16338 transitions. [2021-06-05 21:02:52,992 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:52,992 INFO L276 IsEmpty]: Start isEmpty. Operand 5692 states and 16338 transitions. [2021-06-05 21:02:52,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 21:02:52,995 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:02:52,995 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:02:53,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:02:53,196 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:02:53,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:02:53,196 INFO L82 PathProgramCache]: Analyzing trace with hash 334241155, now seen corresponding path program 35 times [2021-06-05 21:02:53,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:02:53,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790186694] [2021-06-05 21:02:53,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:02:53,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:02:53,235 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:02:53,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:02:53,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790186694] [2021-06-05 21:02:53,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790186694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:02:53,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996909746] [2021-06-05 21:02:53,236 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:02:53,264 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:02:53,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:02:53,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:02:53,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:02:53,317 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:02:53,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996909746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:02:53,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:02:53,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 8 [2021-06-05 21:02:53,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384178782] [2021-06-05 21:02:53,318 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:02:53,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:02:53,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:02:53,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:02:53,319 INFO L87 Difference]: Start difference. First operand 5692 states and 16338 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:53,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:02:53,443 INFO L93 Difference]: Finished difference Result 8010 states and 22671 transitions. [2021-06-05 21:02:53,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:02:53,443 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 21:02:53,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:02:53,452 INFO L225 Difference]: With dead ends: 8010 [2021-06-05 21:02:53,452 INFO L226 Difference]: Without dead ends: 7995 [2021-06-05 21:02:53,453 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 54.0ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:02:53,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7995 states. [2021-06-05 21:02:53,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7995 to 7490. [2021-06-05 21:02:53,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7490 states, 7489 states have (on average 2.8919748965148884) internal successors, (21658), 7489 states have internal predecessors, (21658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:53,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7490 states to 7490 states and 21658 transitions. [2021-06-05 21:02:53,586 INFO L78 Accepts]: Start accepts. Automaton has 7490 states and 21658 transitions. Word has length 26 [2021-06-05 21:02:53,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:02:53,586 INFO L482 AbstractCegarLoop]: Abstraction has 7490 states and 21658 transitions. [2021-06-05 21:02:53,586 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:53,586 INFO L276 IsEmpty]: Start isEmpty. Operand 7490 states and 21658 transitions. [2021-06-05 21:02:53,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 21:02:53,591 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:02:53,591 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:02:53,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable82 [2021-06-05 21:02:53,797 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:02:53,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:02:53,797 INFO L82 PathProgramCache]: Analyzing trace with hash -232684456, now seen corresponding path program 36 times [2021-06-05 21:02:53,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:02:53,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914584080] [2021-06-05 21:02:53,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:02:53,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:02:53,849 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:02:53,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:02:53,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914584080] [2021-06-05 21:02:53,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914584080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:02:53,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176664201] [2021-06-05 21:02:53,850 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:02:53,890 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:02:53,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:02:53,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:02:53,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:02:53,970 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:02:53,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176664201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:02:53,970 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:02:53,970 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2021-06-05 21:02:53,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882880290] [2021-06-05 21:02:53,970 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:02:53,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:02:53,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:02:53,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:02:53,972 INFO L87 Difference]: Start difference. First operand 7490 states and 21658 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:54,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:02:54,237 INFO L93 Difference]: Finished difference Result 8305 states and 23489 transitions. [2021-06-05 21:02:54,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:02:54,237 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 21:02:54,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:02:54,247 INFO L225 Difference]: With dead ends: 8305 [2021-06-05 21:02:54,247 INFO L226 Difference]: Without dead ends: 8305 [2021-06-05 21:02:54,248 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 150.2ms TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:02:54,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8305 states. [2021-06-05 21:02:54,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8305 to 5349. [2021-06-05 21:02:54,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5349 states, 5348 states have (on average 2.863874345549738) internal successors, (15316), 5348 states have internal predecessors, (15316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:54,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5349 states to 5349 states and 15316 transitions. [2021-06-05 21:02:54,384 INFO L78 Accepts]: Start accepts. Automaton has 5349 states and 15316 transitions. Word has length 26 [2021-06-05 21:02:54,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:02:54,384 INFO L482 AbstractCegarLoop]: Abstraction has 5349 states and 15316 transitions. [2021-06-05 21:02:54,384 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:54,384 INFO L276 IsEmpty]: Start isEmpty. Operand 5349 states and 15316 transitions. [2021-06-05 21:02:54,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 21:02:54,388 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:02:54,388 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:02:54,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:02:54,593 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:02:54,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:02:54,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1947181405, now seen corresponding path program 37 times [2021-06-05 21:02:54,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:02:54,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932851242] [2021-06-05 21:02:54,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:02:54,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:02:54,640 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:02:54,640 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:02:54,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932851242] [2021-06-05 21:02:54,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932851242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:02:54,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897627860] [2021-06-05 21:02:54,640 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:02:54,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:02:54,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:02:54,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:02:54,722 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:02:54,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897627860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:02:54,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:02:54,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 21:02:54,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429112714] [2021-06-05 21:02:54,722 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:02:54,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:02:54,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:02:54,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:02:54,723 INFO L87 Difference]: Start difference. First operand 5349 states and 15316 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:54,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:02:54,831 INFO L93 Difference]: Finished difference Result 5938 states and 16533 transitions. [2021-06-05 21:02:54,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 21:02:54,832 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 21:02:54,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:02:54,837 INFO L225 Difference]: With dead ends: 5938 [2021-06-05 21:02:54,837 INFO L226 Difference]: Without dead ends: 5915 [2021-06-05 21:02:54,838 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 55.4ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:02:54,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5915 states. [2021-06-05 21:02:54,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5915 to 5382. [2021-06-05 21:02:54,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5382 states, 5381 states have (on average 2.858018955584464) internal successors, (15379), 5381 states have internal predecessors, (15379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:54,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5382 states to 5382 states and 15379 transitions. [2021-06-05 21:02:54,906 INFO L78 Accepts]: Start accepts. Automaton has 5382 states and 15379 transitions. Word has length 26 [2021-06-05 21:02:54,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:02:54,906 INFO L482 AbstractCegarLoop]: Abstraction has 5382 states and 15379 transitions. [2021-06-05 21:02:54,906 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:54,906 INFO L276 IsEmpty]: Start isEmpty. Operand 5382 states and 15379 transitions. [2021-06-05 21:02:54,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 21:02:54,910 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:02:54,910 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:02:55,111 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-06-05 21:02:55,111 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:02:55,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:02:55,111 INFO L82 PathProgramCache]: Analyzing trace with hash -1692037720, now seen corresponding path program 5 times [2021-06-05 21:02:55,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:02:55,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069372939] [2021-06-05 21:02:55,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:02:55,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:02:55,162 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:02:55,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:02:55,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069372939] [2021-06-05 21:02:55,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069372939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:02:55,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151679466] [2021-06-05 21:02:55,163 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:02:55,194 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:02:55,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:02:55,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:02:55,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:02:55,264 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:02:55,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151679466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:02:55,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:02:55,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 21:02:55,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775716328] [2021-06-05 21:02:55,265 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:02:55,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:02:55,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:02:55,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:02:55,265 INFO L87 Difference]: Start difference. First operand 5382 states and 15379 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:55,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:02:55,509 INFO L93 Difference]: Finished difference Result 5894 states and 16303 transitions. [2021-06-05 21:02:55,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:02:55,510 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 21:02:55,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:02:55,516 INFO L225 Difference]: With dead ends: 5894 [2021-06-05 21:02:55,516 INFO L226 Difference]: Without dead ends: 5890 [2021-06-05 21:02:55,517 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 114.8ms TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:02:55,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5890 states. [2021-06-05 21:02:55,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5890 to 5478. [2021-06-05 21:02:55,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5478 states, 5477 states have (on average 2.823808654372832) internal successors, (15466), 5477 states have internal predecessors, (15466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:55,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5478 states to 5478 states and 15466 transitions. [2021-06-05 21:02:55,595 INFO L78 Accepts]: Start accepts. Automaton has 5478 states and 15466 transitions. Word has length 29 [2021-06-05 21:02:55,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:02:55,595 INFO L482 AbstractCegarLoop]: Abstraction has 5478 states and 15466 transitions. [2021-06-05 21:02:55,595 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:55,595 INFO L276 IsEmpty]: Start isEmpty. Operand 5478 states and 15466 transitions. [2021-06-05 21:02:55,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 21:02:55,599 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:02:55,599 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:02:55,807 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:02:55,807 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:02:55,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:02:55,807 INFO L82 PathProgramCache]: Analyzing trace with hash 2081641864, now seen corresponding path program 38 times [2021-06-05 21:02:55,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:02:55,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557060035] [2021-06-05 21:02:55,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:02:55,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:02:55,848 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:02:55,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:02:55,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557060035] [2021-06-05 21:02:55,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557060035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:02:55,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150943372] [2021-06-05 21:02:55,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:02:55,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:02:55,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:02:55,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:02:55,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:02:55,925 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:02:55,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150943372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:02:55,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:02:55,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 21:02:55,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516521761] [2021-06-05 21:02:55,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 21:02:55,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:02:55,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 21:02:55,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 21:02:55,956 INFO L87 Difference]: Start difference. First operand 5478 states and 15466 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:56,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:02:56,079 INFO L93 Difference]: Finished difference Result 6571 states and 18236 transitions. [2021-06-05 21:02:56,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 21:02:56,079 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 21:02:56,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:02:56,086 INFO L225 Difference]: With dead ends: 6571 [2021-06-05 21:02:56,086 INFO L226 Difference]: Without dead ends: 6564 [2021-06-05 21:02:56,087 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.8ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 21:02:56,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6564 states. [2021-06-05 21:02:56,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6564 to 6354. [2021-06-05 21:02:56,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6354 states, 6353 states have (on average 2.808279552967102) internal successors, (17841), 6353 states have internal predecessors, (17841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:56,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6354 states to 6354 states and 17841 transitions. [2021-06-05 21:02:56,191 INFO L78 Accepts]: Start accepts. Automaton has 6354 states and 17841 transitions. Word has length 29 [2021-06-05 21:02:56,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:02:56,192 INFO L482 AbstractCegarLoop]: Abstraction has 6354 states and 17841 transitions. [2021-06-05 21:02:56,192 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:56,192 INFO L276 IsEmpty]: Start isEmpty. Operand 6354 states and 17841 transitions. [2021-06-05 21:02:56,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 21:02:56,196 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:02:56,196 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:02:56,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:02:56,396 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:02:56,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:02:56,397 INFO L82 PathProgramCache]: Analyzing trace with hash -159779870, now seen corresponding path program 39 times [2021-06-05 21:02:56,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:02:56,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009646915] [2021-06-05 21:02:56,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:02:56,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:02:56,435 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 21:02:56,435 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:02:56,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009646915] [2021-06-05 21:02:56,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009646915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:02:56,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773726973] [2021-06-05 21:02:56,436 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:02:56,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:02:56,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:02:56,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:02:56,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:02:56,613 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 21:02:56,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773726973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:02:56,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:02:56,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9] total 12 [2021-06-05 21:02:56,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978107730] [2021-06-05 21:02:56,613 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:02:56,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:02:56,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:02:56,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:02:56,614 INFO L87 Difference]: Start difference. First operand 6354 states and 17841 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:57,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:02:57,412 INFO L93 Difference]: Finished difference Result 14438 states and 39075 transitions. [2021-06-05 21:02:57,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 21:02:57,412 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 21:02:57,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:02:57,432 INFO L225 Difference]: With dead ends: 14438 [2021-06-05 21:02:57,432 INFO L226 Difference]: Without dead ends: 14355 [2021-06-05 21:02:57,432 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 443.3ms TimeCoverageRelationStatistics Valid=181, Invalid=749, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:02:57,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14355 states. [2021-06-05 21:02:57,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14355 to 8796. [2021-06-05 21:02:57,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8796 states, 8795 states have (on average 2.8627629334849347) internal successors, (25178), 8795 states have internal predecessors, (25178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:57,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8796 states to 8796 states and 25178 transitions. [2021-06-05 21:02:57,624 INFO L78 Accepts]: Start accepts. Automaton has 8796 states and 25178 transitions. Word has length 29 [2021-06-05 21:02:57,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:02:57,624 INFO L482 AbstractCegarLoop]: Abstraction has 8796 states and 25178 transitions. [2021-06-05 21:02:57,625 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:57,625 INFO L276 IsEmpty]: Start isEmpty. Operand 8796 states and 25178 transitions. [2021-06-05 21:02:57,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 21:02:57,630 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:02:57,630 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:02:57,830 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:02:57,830 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:02:57,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:02:57,831 INFO L82 PathProgramCache]: Analyzing trace with hash 328852904, now seen corresponding path program 6 times [2021-06-05 21:02:57,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:02:57,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327991720] [2021-06-05 21:02:57,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:02:57,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:02:57,897 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:02:57,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:02:57,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327991720] [2021-06-05 21:02:57,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327991720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:02:57,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828991987] [2021-06-05 21:02:57,898 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:02:57,943 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:02:57,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:02:57,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:02:57,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:02:58,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:02:58,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:02:58,092 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:02:58,094 INFO L628 ElimStorePlain]: treesize reduction 14, result has 6.7 percent of original size [2021-06-05 21:02:58,094 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-06-05 21:02:58,094 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:02:58,094 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:22, output treesize:1 [2021-06-05 21:02:58,100 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:02:58,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828991987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:02:58,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:02:58,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 21:02:58,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510588456] [2021-06-05 21:02:58,101 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:02:58,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:02:58,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:02:58,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:02:58,102 INFO L87 Difference]: Start difference. First operand 8796 states and 25178 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:58,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:02:58,407 INFO L93 Difference]: Finished difference Result 6002 states and 16256 transitions. [2021-06-05 21:02:58,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:02:58,408 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 21:02:58,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:02:58,415 INFO L225 Difference]: With dead ends: 6002 [2021-06-05 21:02:58,415 INFO L226 Difference]: Without dead ends: 5857 [2021-06-05 21:02:58,415 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 85.9ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:02:58,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5857 states. [2021-06-05 21:02:58,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5857 to 3330. [2021-06-05 21:02:58,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3330 states, 3329 states have (on average 2.7981375788525082) internal successors, (9315), 3329 states have internal predecessors, (9315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:58,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3330 states to 3330 states and 9315 transitions. [2021-06-05 21:02:58,462 INFO L78 Accepts]: Start accepts. Automaton has 3330 states and 9315 transitions. Word has length 29 [2021-06-05 21:02:58,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:02:58,462 INFO L482 AbstractCegarLoop]: Abstraction has 3330 states and 9315 transitions. [2021-06-05 21:02:58,462 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:58,462 INFO L276 IsEmpty]: Start isEmpty. Operand 3330 states and 9315 transitions. [2021-06-05 21:02:58,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 21:02:58,464 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:02:58,464 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:02:58,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:02:58,665 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:02:58,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:02:58,665 INFO L82 PathProgramCache]: Analyzing trace with hash -114875864, now seen corresponding path program 7 times [2021-06-05 21:02:58,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:02:58,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552444320] [2021-06-05 21:02:58,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:02:58,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:02:58,716 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:02:58,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:02:58,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552444320] [2021-06-05 21:02:58,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552444320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:02:58,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089443255] [2021-06-05 21:02:58,716 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 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 [2021-06-05 21:02:58,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:02:58,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:02:58,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:02:58,784 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:02:58,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089443255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:02:58,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:02:58,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 21:02:58,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906234671] [2021-06-05 21:02:58,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:02:58,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:02:58,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:02:58,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:02:58,784 INFO L87 Difference]: Start difference. First operand 3330 states and 9315 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:58,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:02:58,889 INFO L93 Difference]: Finished difference Result 3434 states and 9538 transitions. [2021-06-05 21:02:58,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:02:58,889 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 21:02:58,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:02:58,892 INFO L225 Difference]: With dead ends: 3434 [2021-06-05 21:02:58,892 INFO L226 Difference]: Without dead ends: 3434 [2021-06-05 21:02:58,892 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 59.0ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:02:58,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3434 states. [2021-06-05 21:02:58,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3434 to 3356. [2021-06-05 21:02:58,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3356 states, 3355 states have (on average 2.794634873323398) internal successors, (9376), 3355 states have internal predecessors, (9376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:58,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3356 states to 3356 states and 9376 transitions. [2021-06-05 21:02:58,927 INFO L78 Accepts]: Start accepts. Automaton has 3356 states and 9376 transitions. Word has length 29 [2021-06-05 21:02:58,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:02:58,927 INFO L482 AbstractCegarLoop]: Abstraction has 3356 states and 9376 transitions. [2021-06-05 21:02:58,927 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:58,927 INFO L276 IsEmpty]: Start isEmpty. Operand 3356 states and 9376 transitions. [2021-06-05 21:02:58,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 21:02:58,929 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:02:58,929 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:02:59,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-06-05 21:02:59,133 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:02:59,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:02:59,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1336556998, now seen corresponding path program 6 times [2021-06-05 21:02:59,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:02:59,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984642106] [2021-06-05 21:02:59,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:02:59,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:02:59,189 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:02:59,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:02:59,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984642106] [2021-06-05 21:02:59,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984642106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:02:59,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107818898] [2021-06-05 21:02:59,189 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:02:59,212 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 21:02:59,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:02:59,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:02:59,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:02:59,263 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:02:59,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107818898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:02:59,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:02:59,263 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 21:02:59,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614941980] [2021-06-05 21:02:59,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:02:59,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:02:59,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:02:59,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:02:59,264 INFO L87 Difference]: Start difference. First operand 3356 states and 9376 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:59,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:02:59,373 INFO L93 Difference]: Finished difference Result 3792 states and 10255 transitions. [2021-06-05 21:02:59,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:02:59,374 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 21:02:59,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:02:59,377 INFO L225 Difference]: With dead ends: 3792 [2021-06-05 21:02:59,377 INFO L226 Difference]: Without dead ends: 3777 [2021-06-05 21:02:59,378 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 52.5ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:02:59,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3777 states. [2021-06-05 21:02:59,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3777 to 3443. [2021-06-05 21:02:59,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3443 states, 3442 states have (on average 2.779779198140616) internal successors, (9568), 3442 states have internal predecessors, (9568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:59,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3443 states to 3443 states and 9568 transitions. [2021-06-05 21:02:59,414 INFO L78 Accepts]: Start accepts. Automaton has 3443 states and 9568 transitions. Word has length 29 [2021-06-05 21:02:59,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:02:59,414 INFO L482 AbstractCegarLoop]: Abstraction has 3443 states and 9568 transitions. [2021-06-05 21:02:59,414 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:59,414 INFO L276 IsEmpty]: Start isEmpty. Operand 3443 states and 9568 transitions. [2021-06-05 21:02:59,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 21:02:59,416 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:02:59,416 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:02:59,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-06-05 21:02:59,616 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:02:59,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:02:59,617 INFO L82 PathProgramCache]: Analyzing trace with hash -1458077306, now seen corresponding path program 8 times [2021-06-05 21:02:59,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:02:59,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835363570] [2021-06-05 21:02:59,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:02:59,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:02:59,666 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:02:59,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:02:59,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835363570] [2021-06-05 21:02:59,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835363570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:02:59,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539032543] [2021-06-05 21:02:59,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:02:59,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:02:59,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:02:59,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:02:59,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:02:59,773 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:02:59,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539032543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:02:59,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:02:59,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 21:02:59,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803037349] [2021-06-05 21:02:59,773 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:02:59,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:02:59,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:02:59,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:02:59,774 INFO L87 Difference]: Start difference. First operand 3443 states and 9568 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:59,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:02:59,922 INFO L93 Difference]: Finished difference Result 3707 states and 10003 transitions. [2021-06-05 21:02:59,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:02:59,923 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 21:02:59,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:02:59,926 INFO L225 Difference]: With dead ends: 3707 [2021-06-05 21:02:59,926 INFO L226 Difference]: Without dead ends: 3623 [2021-06-05 21:02:59,926 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 48.9ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:02:59,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3623 states. [2021-06-05 21:02:59,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3623 to 3361. [2021-06-05 21:02:59,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3361 states, 3360 states have (on average 2.7607142857142857) internal successors, (9276), 3360 states have internal predecessors, (9276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:59,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3361 states to 3361 states and 9276 transitions. [2021-06-05 21:02:59,958 INFO L78 Accepts]: Start accepts. Automaton has 3361 states and 9276 transitions. Word has length 29 [2021-06-05 21:02:59,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:02:59,958 INFO L482 AbstractCegarLoop]: Abstraction has 3361 states and 9276 transitions. [2021-06-05 21:02:59,958 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:02:59,958 INFO L276 IsEmpty]: Start isEmpty. Operand 3361 states and 9276 transitions. [2021-06-05 21:02:59,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 21:02:59,960 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:02:59,960 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:03:00,161 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-06-05 21:03:00,161 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:00,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:00,161 INFO L82 PathProgramCache]: Analyzing trace with hash -2071613486, now seen corresponding path program 9 times [2021-06-05 21:03:00,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:00,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769863765] [2021-06-05 21:03:00,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:00,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:00,215 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:03:00,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:00,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769863765] [2021-06-05 21:03:00,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769863765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:00,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208498648] [2021-06-05 21:03:00,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 21:03:00,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 21:03:00,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:03:00,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:03:00,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:03:00,316 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:03:00,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208498648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:00,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:03:00,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 21:03:00,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826466715] [2021-06-05 21:03:00,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:03:00,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:00,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:03:00,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:03:00,317 INFO L87 Difference]: Start difference. First operand 3361 states and 9276 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:00,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:00,422 INFO L93 Difference]: Finished difference Result 3919 states and 10560 transitions. [2021-06-05 21:03:00,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:03:00,423 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 21:03:00,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:00,427 INFO L225 Difference]: With dead ends: 3919 [2021-06-05 21:03:00,427 INFO L226 Difference]: Without dead ends: 3907 [2021-06-05 21:03:00,427 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 57.1ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:03:00,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3907 states. [2021-06-05 21:03:00,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3907 to 3641. [2021-06-05 21:03:00,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3641 states, 3640 states have (on average 2.745879120879121) internal successors, (9995), 3640 states have internal predecessors, (9995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:00,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3641 states to 3641 states and 9995 transitions. [2021-06-05 21:03:00,472 INFO L78 Accepts]: Start accepts. Automaton has 3641 states and 9995 transitions. Word has length 29 [2021-06-05 21:03:00,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:00,472 INFO L482 AbstractCegarLoop]: Abstraction has 3641 states and 9995 transitions. [2021-06-05 21:03:00,472 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:00,473 INFO L276 IsEmpty]: Start isEmpty. Operand 3641 states and 9995 transitions. [2021-06-05 21:03:00,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 21:03:00,475 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:00,475 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:03:00,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-06-05 21:03:00,677 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:00,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:00,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1048811592, now seen corresponding path program 40 times [2021-06-05 21:03:00,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:00,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80432629] [2021-06-05 21:03:00,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:00,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:00,716 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 21:03:00,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:00,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80432629] [2021-06-05 21:03:00,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80432629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:00,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513731958] [2021-06-05 21:03:00,717 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:00,745 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:03:00,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:03:00,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:03:00,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:03:00,797 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 21:03:00,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513731958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:00,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:03:00,798 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 21:03:00,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085017457] [2021-06-05 21:03:00,798 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 21:03:00,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:00,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 21:03:00,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 21:03:00,799 INFO L87 Difference]: Start difference. First operand 3641 states and 9995 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:00,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:00,898 INFO L93 Difference]: Finished difference Result 4879 states and 13397 transitions. [2021-06-05 21:03:00,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 21:03:00,898 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 21:03:00,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:00,903 INFO L225 Difference]: With dead ends: 4879 [2021-06-05 21:03:00,903 INFO L226 Difference]: Without dead ends: 4866 [2021-06-05 21:03:00,903 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.6ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 21:03:00,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4866 states. [2021-06-05 21:03:00,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4866 to 4554. [2021-06-05 21:03:00,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4554 states, 4553 states have (on average 2.7981550625960905) internal successors, (12740), 4553 states have internal predecessors, (12740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:00,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4554 states to 4554 states and 12740 transitions. [2021-06-05 21:03:00,950 INFO L78 Accepts]: Start accepts. Automaton has 4554 states and 12740 transitions. Word has length 29 [2021-06-05 21:03:00,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:00,950 INFO L482 AbstractCegarLoop]: Abstraction has 4554 states and 12740 transitions. [2021-06-05 21:03:00,950 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:00,950 INFO L276 IsEmpty]: Start isEmpty. Operand 4554 states and 12740 transitions. [2021-06-05 21:03:00,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 21:03:00,952 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:00,952 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:03:01,153 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-06-05 21:03:01,153 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:01,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:01,153 INFO L82 PathProgramCache]: Analyzing trace with hash 70303848, now seen corresponding path program 10 times [2021-06-05 21:03:01,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:01,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533105542] [2021-06-05 21:03:01,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:01,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:01,203 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:03:01,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:01,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533105542] [2021-06-05 21:03:01,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533105542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:01,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925825119] [2021-06-05 21:03:01,203 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:01,229 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:03:01,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:03:01,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 21:03:01,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:03:01,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:03:01,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2021-06-05 21:03:01,288 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:03:01,290 INFO L628 ElimStorePlain]: treesize reduction 20, result has 4.8 percent of original size [2021-06-05 21:03:01,290 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-06-05 21:03:01,290 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:03:01,290 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:1 [2021-06-05 21:03:01,297 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:03:01,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925825119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:01,297 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:03:01,297 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 21:03:01,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899861944] [2021-06-05 21:03:01,297 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:03:01,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:01,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:03:01,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:03:01,298 INFO L87 Difference]: Start difference. First operand 4554 states and 12740 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:01,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:01,503 INFO L93 Difference]: Finished difference Result 7716 states and 21017 transitions. [2021-06-05 21:03:01,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:03:01,504 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 21:03:01,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:01,513 INFO L225 Difference]: With dead ends: 7716 [2021-06-05 21:03:01,513 INFO L226 Difference]: Without dead ends: 7689 [2021-06-05 21:03:01,513 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 86.7ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:03:01,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7689 states. [2021-06-05 21:03:01,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7689 to 6612. [2021-06-05 21:03:01,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6612 states, 6611 states have (on average 2.8100136136741796) internal successors, (18577), 6611 states have internal predecessors, (18577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:01,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6612 states to 6612 states and 18577 transitions. [2021-06-05 21:03:01,625 INFO L78 Accepts]: Start accepts. Automaton has 6612 states and 18577 transitions. Word has length 29 [2021-06-05 21:03:01,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:01,625 INFO L482 AbstractCegarLoop]: Abstraction has 6612 states and 18577 transitions. [2021-06-05 21:03:01,625 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:01,625 INFO L276 IsEmpty]: Start isEmpty. Operand 6612 states and 18577 transitions. [2021-06-05 21:03:01,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 21:03:01,628 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:01,629 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:03:01,831 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-06-05 21:03:01,831 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:01,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:01,831 INFO L82 PathProgramCache]: Analyzing trace with hash -1154021054, now seen corresponding path program 7 times [2021-06-05 21:03:01,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:01,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201749837] [2021-06-05 21:03:01,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:01,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:01,877 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:03:01,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:01,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201749837] [2021-06-05 21:03:01,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201749837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:01,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127784204] [2021-06-05 21:03:01,878 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:01,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:01,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 21:03:01,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:03:01,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:03:01,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2021-06-05 21:03:01,974 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:03:01,977 INFO L628 ElimStorePlain]: treesize reduction 20, result has 4.8 percent of original size [2021-06-05 21:03:01,977 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-06-05 21:03:01,978 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:03:01,978 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:1 [2021-06-05 21:03:01,984 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:03:01,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127784204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:01,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:03:01,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 21:03:01,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893915567] [2021-06-05 21:03:01,985 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:03:01,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:01,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:03:01,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:03:01,985 INFO L87 Difference]: Start difference. First operand 6612 states and 18577 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:02,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:02,245 INFO L93 Difference]: Finished difference Result 7693 states and 20980 transitions. [2021-06-05 21:03:02,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:03:02,246 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 21:03:02,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:02,258 INFO L225 Difference]: With dead ends: 7693 [2021-06-05 21:03:02,258 INFO L226 Difference]: Without dead ends: 7662 [2021-06-05 21:03:02,259 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 93.9ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:03:02,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7662 states. [2021-06-05 21:03:02,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7662 to 6972. [2021-06-05 21:03:02,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6972 states, 6971 states have (on average 2.7987376273131543) internal successors, (19510), 6971 states have internal predecessors, (19510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:02,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6972 states to 6972 states and 19510 transitions. [2021-06-05 21:03:02,382 INFO L78 Accepts]: Start accepts. Automaton has 6972 states and 19510 transitions. Word has length 29 [2021-06-05 21:03:02,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:02,383 INFO L482 AbstractCegarLoop]: Abstraction has 6972 states and 19510 transitions. [2021-06-05 21:03:02,383 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:02,383 INFO L276 IsEmpty]: Start isEmpty. Operand 6972 states and 19510 transitions. [2021-06-05 21:03:02,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 21:03:02,387 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:02,388 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:03:02,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:02,601 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:02,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:02,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1507649858, now seen corresponding path program 11 times [2021-06-05 21:03:02,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:02,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076878380] [2021-06-05 21:03:02,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:02,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:02,661 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:03:02,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:02,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076878380] [2021-06-05 21:03:02,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076878380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:02,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746738292] [2021-06-05 21:03:02,662 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:02,691 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:03:02,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:03:02,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:03:02,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:03:02,787 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:03:02,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746738292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:02,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:03:02,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-05 21:03:02,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585448607] [2021-06-05 21:03:02,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:03:02,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:02,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:03:02,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:03:02,789 INFO L87 Difference]: Start difference. First operand 6972 states and 19510 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:02,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:02,968 INFO L93 Difference]: Finished difference Result 6857 states and 19119 transitions. [2021-06-05 21:03:02,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 21:03:02,968 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 21:03:02,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:02,980 INFO L225 Difference]: With dead ends: 6857 [2021-06-05 21:03:02,980 INFO L226 Difference]: Without dead ends: 6823 [2021-06-05 21:03:02,980 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 62.6ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:03:02,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6823 states. [2021-06-05 21:03:03,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6823 to 6569. [2021-06-05 21:03:03,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6569 states, 6568 states have (on average 2.82673568818514) internal successors, (18566), 6568 states have internal predecessors, (18566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:03,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6569 states to 6569 states and 18566 transitions. [2021-06-05 21:03:03,091 INFO L78 Accepts]: Start accepts. Automaton has 6569 states and 18566 transitions. Word has length 29 [2021-06-05 21:03:03,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:03,091 INFO L482 AbstractCegarLoop]: Abstraction has 6569 states and 18566 transitions. [2021-06-05 21:03:03,091 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:03,091 INFO L276 IsEmpty]: Start isEmpty. Operand 6569 states and 18566 transitions. [2021-06-05 21:03:03,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 21:03:03,094 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:03,094 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:03:03,294 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-06-05 21:03:03,295 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:03,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:03,295 INFO L82 PathProgramCache]: Analyzing trace with hash 1002279274, now seen corresponding path program 8 times [2021-06-05 21:03:03,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:03,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833922007] [2021-06-05 21:03:03,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:03,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:03,341 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:03:03,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:03,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833922007] [2021-06-05 21:03:03,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833922007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:03,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712061898] [2021-06-05 21:03:03,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:03,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:03:03,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:03:03,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:03:03,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:03:03,412 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:03:03,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712061898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:03,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:03:03,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 21:03:03,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583604603] [2021-06-05 21:03:03,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:03:03,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:03,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:03:03,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:03:03,413 INFO L87 Difference]: Start difference. First operand 6569 states and 18566 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:03,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:03,592 INFO L93 Difference]: Finished difference Result 6936 states and 19307 transitions. [2021-06-05 21:03:03,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:03:03,592 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 21:03:03,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:03,602 INFO L225 Difference]: With dead ends: 6936 [2021-06-05 21:03:03,602 INFO L226 Difference]: Without dead ends: 6928 [2021-06-05 21:03:03,602 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 53.3ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:03:03,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6928 states. [2021-06-05 21:03:03,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6928 to 6620. [2021-06-05 21:03:03,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6620 states, 6619 states have (on average 2.8214231757063) internal successors, (18675), 6619 states have internal predecessors, (18675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:03,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6620 states to 6620 states and 18675 transitions. [2021-06-05 21:03:03,734 INFO L78 Accepts]: Start accepts. Automaton has 6620 states and 18675 transitions. Word has length 29 [2021-06-05 21:03:03,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:03,734 INFO L482 AbstractCegarLoop]: Abstraction has 6620 states and 18675 transitions. [2021-06-05 21:03:03,735 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:03,735 INFO L276 IsEmpty]: Start isEmpty. Operand 6620 states and 18675 transitions. [2021-06-05 21:03:03,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 21:03:03,738 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:03,739 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:03:03,957 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:03,958 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:03,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:03,958 INFO L82 PathProgramCache]: Analyzing trace with hash -1792355030, now seen corresponding path program 12 times [2021-06-05 21:03:03,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:03,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411754904] [2021-06-05 21:03:03,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:03,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:04,030 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:03:04,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:04,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411754904] [2021-06-05 21:03:04,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411754904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:04,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175650569] [2021-06-05 21:03:04,031 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:04,056 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:03:04,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:03:04,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:03:04,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:03:04,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:03:04,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:03:04,142 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:03:04,144 INFO L628 ElimStorePlain]: treesize reduction 14, result has 6.7 percent of original size [2021-06-05 21:03:04,144 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-06-05 21:03:04,145 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:03:04,145 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:22, output treesize:1 [2021-06-05 21:03:04,151 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:03:04,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175650569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:04,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:03:04,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 21:03:04,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499694577] [2021-06-05 21:03:04,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:03:04,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:04,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:03:04,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:03:04,152 INFO L87 Difference]: Start difference. First operand 6620 states and 18675 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:04,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:04,312 INFO L93 Difference]: Finished difference Result 6433 states and 17744 transitions. [2021-06-05 21:03:04,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:03:04,312 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 21:03:04,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:04,318 INFO L225 Difference]: With dead ends: 6433 [2021-06-05 21:03:04,319 INFO L226 Difference]: Without dead ends: 6334 [2021-06-05 21:03:04,319 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 61.1ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:03:04,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6334 states. [2021-06-05 21:03:04,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6334 to 5949. [2021-06-05 21:03:04,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5949 states, 5948 states have (on average 2.8169132481506387) internal successors, (16755), 5948 states have internal predecessors, (16755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:04,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5949 states to 5949 states and 16755 transitions. [2021-06-05 21:03:04,390 INFO L78 Accepts]: Start accepts. Automaton has 5949 states and 16755 transitions. Word has length 29 [2021-06-05 21:03:04,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:04,390 INFO L482 AbstractCegarLoop]: Abstraction has 5949 states and 16755 transitions. [2021-06-05 21:03:04,390 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) [2021-06-05 21:03:04,390 INFO L276 IsEmpty]: Start isEmpty. Operand 5949 states and 16755 transitions. [2021-06-05 21:03:04,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 21:03:04,394 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:04,394 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:03:04,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2021-06-05 21:03:04,609 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:04,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:04,609 INFO L82 PathProgramCache]: Analyzing trace with hash 869370402, now seen corresponding path program 41 times [2021-06-05 21:03:04,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:04,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601907433] [2021-06-05 21:03:04,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:04,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:04,644 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:03:04,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:04,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601907433] [2021-06-05 21:03:04,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601907433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:04,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238306453] [2021-06-05 21:03:04,645 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 21:03:04,673 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 21:03:04,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:03:04,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:03:04,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:03:04,719 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:03:04,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238306453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:04,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:03:04,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 21:03:04,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476576650] [2021-06-05 21:03:04,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 21:03:04,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:04,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 21:03:04,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 21:03:04,721 INFO L87 Difference]: Start difference. First operand 5949 states and 16755 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:04,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:04,844 INFO L93 Difference]: Finished difference Result 6991 states and 19595 transitions. [2021-06-05 21:03:04,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 21:03:04,844 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 21:03:04,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:04,855 INFO L225 Difference]: With dead ends: 6991 [2021-06-05 21:03:04,856 INFO L226 Difference]: Without dead ends: 6978 [2021-06-05 21:03:04,856 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.8ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 21:03:04,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6978 states. [2021-06-05 21:03:04,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6978 to 6732. [2021-06-05 21:03:04,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6732 states, 6731 states have (on average 2.834794235626207) internal successors, (19081), 6731 states have internal predecessors, (19081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:04,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6732 states to 6732 states and 19081 transitions. [2021-06-05 21:03:04,979 INFO L78 Accepts]: Start accepts. Automaton has 6732 states and 19081 transitions. Word has length 29 [2021-06-05 21:03:04,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:04,981 INFO L482 AbstractCegarLoop]: Abstraction has 6732 states and 19081 transitions. [2021-06-05 21:03:04,981 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:04,981 INFO L276 IsEmpty]: Start isEmpty. Operand 6732 states and 19081 transitions. [2021-06-05 21:03:04,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 21:03:04,985 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:04,985 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:03:05,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:05,197 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:05,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:05,197 INFO L82 PathProgramCache]: Analyzing trace with hash -109137342, now seen corresponding path program 13 times [2021-06-05 21:03:05,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:05,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103374301] [2021-06-05 21:03:05,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:05,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:05,243 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:03:05,243 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:05,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103374301] [2021-06-05 21:03:05,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103374301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:05,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112159550] [2021-06-05 21:03:05,244 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 [2021-06-05 21:03:05,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:05,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:03:05,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:03:05,317 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:03:05,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112159550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:05,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:03:05,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 21:03:05,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636328135] [2021-06-05 21:03:05,318 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:03:05,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:05,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:03:05,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:03:05,318 INFO L87 Difference]: Start difference. First operand 6732 states and 19081 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:05,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:05,489 INFO L93 Difference]: Finished difference Result 6655 states and 18587 transitions. [2021-06-05 21:03:05,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:03:05,490 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 21:03:05,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:05,498 INFO L225 Difference]: With dead ends: 6655 [2021-06-05 21:03:05,498 INFO L226 Difference]: Without dead ends: 6601 [2021-06-05 21:03:05,498 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 93.3ms TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:03:05,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6601 states. [2021-06-05 21:03:05,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6601 to 6248. [2021-06-05 21:03:05,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6248 states, 6247 states have (on average 2.8304786297422764) internal successors, (17682), 6247 states have internal predecessors, (17682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:05,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6248 states to 6248 states and 17682 transitions. [2021-06-05 21:03:05,598 INFO L78 Accepts]: Start accepts. Automaton has 6248 states and 17682 transitions. Word has length 29 [2021-06-05 21:03:05,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:05,599 INFO L482 AbstractCegarLoop]: Abstraction has 6248 states and 17682 transitions. [2021-06-05 21:03:05,599 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:05,599 INFO L276 IsEmpty]: Start isEmpty. Operand 6248 states and 17682 transitions. [2021-06-05 21:03:05,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 21:03:05,602 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:05,602 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:03:05,802 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:05,803 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:05,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:05,803 INFO L82 PathProgramCache]: Analyzing trace with hash -1428842088, now seen corresponding path program 42 times [2021-06-05 21:03:05,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:05,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257417232] [2021-06-05 21:03:05,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:05,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:05,871 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:03:05,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:05,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257417232] [2021-06-05 21:03:05,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257417232] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:05,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851486637] [2021-06-05 21:03:05,871 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:05,895 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 21:03:05,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:03:05,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:03:05,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:03:05,947 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:03:05,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851486637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:05,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:03:05,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 21:03:05,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375447681] [2021-06-05 21:03:05,947 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:03:05,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:05,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:03:05,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:03:05,948 INFO L87 Difference]: Start difference. First operand 6248 states and 17682 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:06,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:06,144 INFO L93 Difference]: Finished difference Result 6779 states and 18724 transitions. [2021-06-05 21:03:06,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:03:06,145 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 21:03:06,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:06,152 INFO L225 Difference]: With dead ends: 6779 [2021-06-05 21:03:06,152 INFO L226 Difference]: Without dead ends: 6779 [2021-06-05 21:03:06,152 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 113.7ms TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:03:06,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6779 states. [2021-06-05 21:03:06,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6779 to 6214. [2021-06-05 21:03:06,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6214 states, 6213 states have (on average 2.829550941574119) internal successors, (17580), 6213 states have internal predecessors, (17580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:06,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6214 states to 6214 states and 17580 transitions. [2021-06-05 21:03:06,225 INFO L78 Accepts]: Start accepts. Automaton has 6214 states and 17580 transitions. Word has length 32 [2021-06-05 21:03:06,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:06,225 INFO L482 AbstractCegarLoop]: Abstraction has 6214 states and 17580 transitions. [2021-06-05 21:03:06,225 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:06,225 INFO L276 IsEmpty]: Start isEmpty. Operand 6214 states and 17580 transitions. [2021-06-05 21:03:06,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 21:03:06,229 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:06,229 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:03:06,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:06,449 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:06,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:06,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1675261659, now seen corresponding path program 43 times [2021-06-05 21:03:06,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:06,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182871561] [2021-06-05 21:03:06,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:06,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:06,504 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:03:06,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:06,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182871561] [2021-06-05 21:03:06,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182871561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:06,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879605153] [2021-06-05 21:03:06,505 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:06,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:06,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:03:06,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:03:06,611 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:03:06,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879605153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:06,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:03:06,612 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 9 [2021-06-05 21:03:06,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769173407] [2021-06-05 21:03:06,612 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:03:06,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:06,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:03:06,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:03:06,613 INFO L87 Difference]: Start difference. First operand 6214 states and 17580 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:06,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:06,785 INFO L93 Difference]: Finished difference Result 9059 states and 24818 transitions. [2021-06-05 21:03:06,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:03:06,786 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 21:03:06,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:06,801 INFO L225 Difference]: With dead ends: 9059 [2021-06-05 21:03:06,801 INFO L226 Difference]: Without dead ends: 9035 [2021-06-05 21:03:06,801 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 75.9ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:03:06,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9035 states. [2021-06-05 21:03:06,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9035 to 7541. [2021-06-05 21:03:06,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7541 states, 7540 states have (on average 2.8545092838196284) internal successors, (21523), 7540 states have internal predecessors, (21523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:06,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7541 states to 7541 states and 21523 transitions. [2021-06-05 21:03:06,958 INFO L78 Accepts]: Start accepts. Automaton has 7541 states and 21523 transitions. Word has length 32 [2021-06-05 21:03:06,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:06,958 INFO L482 AbstractCegarLoop]: Abstraction has 7541 states and 21523 transitions. [2021-06-05 21:03:06,958 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:06,958 INFO L276 IsEmpty]: Start isEmpty. Operand 7541 states and 21523 transitions. [2021-06-05 21:03:06,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 21:03:06,963 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:06,963 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:03:07,186 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-06-05 21:03:07,186 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:07,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:07,187 INFO L82 PathProgramCache]: Analyzing trace with hash -1825167733, now seen corresponding path program 44 times [2021-06-05 21:03:07,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:07,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905464582] [2021-06-05 21:03:07,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:07,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:07,227 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 19 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:03:07,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:07,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905464582] [2021-06-05 21:03:07,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905464582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:07,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814144835] [2021-06-05 21:03:07,227 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:07,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:03:07,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:03:07,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:03:07,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:03:07,314 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:03:07,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814144835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:07,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:03:07,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 7 [2021-06-05 21:03:07,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575647679] [2021-06-05 21:03:07,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:03:07,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:07,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:03:07,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:03:07,315 INFO L87 Difference]: Start difference. First operand 7541 states and 21523 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:07,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:07,459 INFO L93 Difference]: Finished difference Result 9025 states and 24686 transitions. [2021-06-05 21:03:07,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:03:07,460 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 21:03:07,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:07,470 INFO L225 Difference]: With dead ends: 9025 [2021-06-05 21:03:07,470 INFO L226 Difference]: Without dead ends: 9025 [2021-06-05 21:03:07,470 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 66.8ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:03:07,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9025 states. [2021-06-05 21:03:07,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9025 to 7365. [2021-06-05 21:03:07,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7365 states, 7364 states have (on average 2.8473655621944594) internal successors, (20968), 7364 states have internal predecessors, (20968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:07,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7365 states to 7365 states and 20968 transitions. [2021-06-05 21:03:07,612 INFO L78 Accepts]: Start accepts. Automaton has 7365 states and 20968 transitions. Word has length 32 [2021-06-05 21:03:07,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:07,612 INFO L482 AbstractCegarLoop]: Abstraction has 7365 states and 20968 transitions. [2021-06-05 21:03:07,612 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:07,612 INFO L276 IsEmpty]: Start isEmpty. Operand 7365 states and 20968 transitions. [2021-06-05 21:03:07,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 21:03:07,616 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:07,616 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:03:07,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-06-05 21:03:07,817 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:07,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:07,818 INFO L82 PathProgramCache]: Analyzing trace with hash 1537983116, now seen corresponding path program 45 times [2021-06-05 21:03:07,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:07,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687773299] [2021-06-05 21:03:07,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:07,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:07,855 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 21 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:03:07,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:07,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687773299] [2021-06-05 21:03:07,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687773299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:07,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462078726] [2021-06-05 21:03:07,856 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:07,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:03:07,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:03:07,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:03:07,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:03:08,036 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-06-05 21:03:08,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462078726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:08,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:03:08,036 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 13 [2021-06-05 21:03:08,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416402453] [2021-06-05 21:03:08,037 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:03:08,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:08,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:03:08,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:03:08,037 INFO L87 Difference]: Start difference. First operand 7365 states and 20968 transitions. Second operand has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:08,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:08,509 INFO L93 Difference]: Finished difference Result 8303 states and 22757 transitions. [2021-06-05 21:03:08,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:03:08,509 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 21:03:08,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:08,522 INFO L225 Difference]: With dead ends: 8303 [2021-06-05 21:03:08,522 INFO L226 Difference]: Without dead ends: 8260 [2021-06-05 21:03:08,523 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 365.7ms TimeCoverageRelationStatistics Valid=190, Invalid=680, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:03:08,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8260 states. [2021-06-05 21:03:08,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8260 to 7571. [2021-06-05 21:03:08,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7571 states, 7570 states have (on average 2.81664464993395) internal successors, (21322), 7570 states have internal predecessors, (21322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:08,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7571 states to 7571 states and 21322 transitions. [2021-06-05 21:03:08,641 INFO L78 Accepts]: Start accepts. Automaton has 7571 states and 21322 transitions. Word has length 32 [2021-06-05 21:03:08,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:08,641 INFO L482 AbstractCegarLoop]: Abstraction has 7571 states and 21322 transitions. [2021-06-05 21:03:08,642 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:08,642 INFO L276 IsEmpty]: Start isEmpty. Operand 7571 states and 21322 transitions. [2021-06-05 21:03:08,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 21:03:08,645 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:08,645 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:03:08,845 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-06-05 21:03:08,846 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:08,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:08,846 INFO L82 PathProgramCache]: Analyzing trace with hash 1465178531, now seen corresponding path program 46 times [2021-06-05 21:03:08,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:08,846 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558094705] [2021-06-05 21:03:08,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:08,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:08,892 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:03:08,893 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:08,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558094705] [2021-06-05 21:03:08,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558094705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:08,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198868871] [2021-06-05 21:03:08,893 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:08,921 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:03:08,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:03:08,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:03:08,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:03:08,999 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:03:09,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198868871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:09,000 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:03:09,000 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 8 [2021-06-05 21:03:09,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816246421] [2021-06-05 21:03:09,000 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:03:09,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:09,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:03:09,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:03:09,001 INFO L87 Difference]: Start difference. First operand 7571 states and 21322 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:09,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:09,229 INFO L93 Difference]: Finished difference Result 13088 states and 35868 transitions. [2021-06-05 21:03:09,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:03:09,229 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 21:03:09,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:09,249 INFO L225 Difference]: With dead ends: 13088 [2021-06-05 21:03:09,249 INFO L226 Difference]: Without dead ends: 13088 [2021-06-05 21:03:09,249 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 86.8ms TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:03:09,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13088 states. [2021-06-05 21:03:09,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13088 to 10587. [2021-06-05 21:03:09,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10587 states, 10586 states have (on average 2.8707727186850556) internal successors, (30390), 10586 states have internal predecessors, (30390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:09,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10587 states to 10587 states and 30390 transitions. [2021-06-05 21:03:09,404 INFO L78 Accepts]: Start accepts. Automaton has 10587 states and 30390 transitions. Word has length 32 [2021-06-05 21:03:09,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:09,404 INFO L482 AbstractCegarLoop]: Abstraction has 10587 states and 30390 transitions. [2021-06-05 21:03:09,404 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:09,404 INFO L276 IsEmpty]: Start isEmpty. Operand 10587 states and 30390 transitions. [2021-06-05 21:03:09,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 21:03:09,408 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:09,408 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:03:09,609 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:09,609 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:09,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:09,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1653853746, now seen corresponding path program 47 times [2021-06-05 21:03:09,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:09,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119739948] [2021-06-05 21:03:09,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:09,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:09,640 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:03:09,640 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:09,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119739948] [2021-06-05 21:03:09,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119739948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:09,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525177757] [2021-06-05 21:03:09,641 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:09,716 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 21:03:09,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:03:09,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:03:09,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:03:09,775 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:03:09,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525177757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:09,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:03:09,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 8 [2021-06-05 21:03:09,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160703347] [2021-06-05 21:03:09,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:03:09,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:09,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:03:09,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:03:09,777 INFO L87 Difference]: Start difference. First operand 10587 states and 30390 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:09,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:09,942 INFO L93 Difference]: Finished difference Result 11705 states and 32668 transitions. [2021-06-05 21:03:09,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:03:09,942 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 21:03:09,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:09,956 INFO L225 Difference]: With dead ends: 11705 [2021-06-05 21:03:09,956 INFO L226 Difference]: Without dead ends: 11705 [2021-06-05 21:03:09,956 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 67.9ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:03:09,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11705 states. [2021-06-05 21:03:10,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11705 to 10573. [2021-06-05 21:03:10,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10573 states, 10572 states have (on average 2.8569807037457435) internal successors, (30204), 10572 states have internal predecessors, (30204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:10,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10573 states to 10573 states and 30204 transitions. [2021-06-05 21:03:10,100 INFO L78 Accepts]: Start accepts. Automaton has 10573 states and 30204 transitions. Word has length 32 [2021-06-05 21:03:10,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:10,100 INFO L482 AbstractCegarLoop]: Abstraction has 10573 states and 30204 transitions. [2021-06-05 21:03:10,100 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:10,100 INFO L276 IsEmpty]: Start isEmpty. Operand 10573 states and 30204 transitions. [2021-06-05 21:03:10,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 21:03:10,104 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:10,104 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:03:10,305 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-06-05 21:03:10,305 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:10,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:10,305 INFO L82 PathProgramCache]: Analyzing trace with hash 2101937765, now seen corresponding path program 48 times [2021-06-05 21:03:10,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:10,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927375385] [2021-06-05 21:03:10,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:10,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:10,344 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 25 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:03:10,345 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:10,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927375385] [2021-06-05 21:03:10,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927375385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:10,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800877350] [2021-06-05 21:03:10,345 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:10,388 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 21:03:10,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:03:10,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:03:10,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:03:10,444 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 27 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:03:10,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800877350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:10,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:03:10,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 7 [2021-06-05 21:03:10,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265668763] [2021-06-05 21:03:10,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:03:10,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:10,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:03:10,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:03:10,445 INFO L87 Difference]: Start difference. First operand 10573 states and 30204 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:10,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:10,621 INFO L93 Difference]: Finished difference Result 17407 states and 48712 transitions. [2021-06-05 21:03:10,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:03:10,621 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 21:03:10,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:10,647 INFO L225 Difference]: With dead ends: 17407 [2021-06-05 21:03:10,647 INFO L226 Difference]: Without dead ends: 17375 [2021-06-05 21:03:10,647 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 51.3ms TimeCoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:03:10,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17375 states. [2021-06-05 21:03:10,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17375 to 13902. [2021-06-05 21:03:10,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13902 states, 13901 states have (on average 2.8969138910869723) internal successors, (40270), 13901 states have internal predecessors, (40270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:10,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13902 states to 13902 states and 40270 transitions. [2021-06-05 21:03:10,873 INFO L78 Accepts]: Start accepts. Automaton has 13902 states and 40270 transitions. Word has length 32 [2021-06-05 21:03:10,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:10,874 INFO L482 AbstractCegarLoop]: Abstraction has 13902 states and 40270 transitions. [2021-06-05 21:03:10,874 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) [2021-06-05 21:03:10,874 INFO L276 IsEmpty]: Start isEmpty. Operand 13902 states and 40270 transitions. [2021-06-05 21:03:10,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 21:03:10,878 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:10,878 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:03:11,078 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-06-05 21:03:11,079 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:11,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:11,079 INFO L82 PathProgramCache]: Analyzing trace with hash 1480057355, now seen corresponding path program 49 times [2021-06-05 21:03:11,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:11,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892889485] [2021-06-05 21:03:11,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:11,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:11,117 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:03:11,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:11,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892889485] [2021-06-05 21:03:11,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892889485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:11,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466810073] [2021-06-05 21:03:11,118 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:11,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:11,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:03:11,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:03:11,256 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 26 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:03:11,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466810073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:11,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:03:11,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 7 [2021-06-05 21:03:11,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389529292] [2021-06-05 21:03:11,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:03:11,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:11,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:03:11,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:03:11,257 INFO L87 Difference]: Start difference. First operand 13902 states and 40270 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:11,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:11,440 INFO L93 Difference]: Finished difference Result 17229 states and 47592 transitions. [2021-06-05 21:03:11,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:03:11,441 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 21:03:11,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:11,463 INFO L225 Difference]: With dead ends: 17229 [2021-06-05 21:03:11,463 INFO L226 Difference]: Without dead ends: 17226 [2021-06-05 21:03:11,463 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 58.6ms TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:03:11,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17226 states. [2021-06-05 21:03:11,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17226 to 13921. [2021-06-05 21:03:11,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13921 states, 13920 states have (on average 2.8902298850574715) internal successors, (40232), 13920 states have internal predecessors, (40232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:11,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13921 states to 13921 states and 40232 transitions. [2021-06-05 21:03:11,683 INFO L78 Accepts]: Start accepts. Automaton has 13921 states and 40232 transitions. Word has length 32 [2021-06-05 21:03:11,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:11,683 INFO L482 AbstractCegarLoop]: Abstraction has 13921 states and 40232 transitions. [2021-06-05 21:03:11,683 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) [2021-06-05 21:03:11,683 INFO L276 IsEmpty]: Start isEmpty. Operand 13921 states and 40232 transitions. [2021-06-05 21:03:11,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 21:03:11,688 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:11,688 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:03:11,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2021-06-05 21:03:11,888 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:11,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:11,889 INFO L82 PathProgramCache]: Analyzing trace with hash -157515101, now seen corresponding path program 50 times [2021-06-05 21:03:11,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:11,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811164119] [2021-06-05 21:03:11,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:11,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:11,940 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 25 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:03:11,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:11,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811164119] [2021-06-05 21:03:11,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811164119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:11,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148324033] [2021-06-05 21:03:11,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:11,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:03:11,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:03:11,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:03:11,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:03:12,039 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 26 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:03:12,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148324033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:12,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:03:12,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 8 [2021-06-05 21:03:12,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869781263] [2021-06-05 21:03:12,039 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:03:12,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:12,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:03:12,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:03:12,040 INFO L87 Difference]: Start difference. First operand 13921 states and 40232 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:12,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:12,282 INFO L93 Difference]: Finished difference Result 17332 states and 47741 transitions. [2021-06-05 21:03:12,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:03:12,283 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 21:03:12,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:12,305 INFO L225 Difference]: With dead ends: 17332 [2021-06-05 21:03:12,306 INFO L226 Difference]: Without dead ends: 17329 [2021-06-05 21:03:12,306 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 92.0ms TimeCoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:03:12,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17329 states. [2021-06-05 21:03:12,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17329 to 13802. [2021-06-05 21:03:12,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13802 states, 13801 states have (on average 2.883124411274545) internal successors, (39790), 13801 states have internal predecessors, (39790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:12,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13802 states to 13802 states and 39790 transitions. [2021-06-05 21:03:12,590 INFO L78 Accepts]: Start accepts. Automaton has 13802 states and 39790 transitions. Word has length 32 [2021-06-05 21:03:12,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:12,590 INFO L482 AbstractCegarLoop]: Abstraction has 13802 states and 39790 transitions. [2021-06-05 21:03:12,590 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:12,590 INFO L276 IsEmpty]: Start isEmpty. Operand 13802 states and 39790 transitions. [2021-06-05 21:03:12,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 21:03:12,596 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:12,596 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:03:12,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-06-05 21:03:12,797 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:12,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:12,797 INFO L82 PathProgramCache]: Analyzing trace with hash 188377863, now seen corresponding path program 51 times [2021-06-05 21:03:12,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:12,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902782956] [2021-06-05 21:03:12,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:12,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:12,858 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:03:12,858 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:12,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902782956] [2021-06-05 21:03:12,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902782956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:12,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428811090] [2021-06-05 21:03:12,859 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:12,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:03:12,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:03:12,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:03:12,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:03:13,090 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-06-05 21:03:13,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428811090] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:13,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:03:13,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2021-06-05 21:03:13,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808482593] [2021-06-05 21:03:13,091 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:03:13,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:13,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:03:13,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:03:13,092 INFO L87 Difference]: Start difference. First operand 13802 states and 39790 transitions. Second operand has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:14,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:14,102 INFO L93 Difference]: Finished difference Result 22708 states and 63895 transitions. [2021-06-05 21:03:14,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 21:03:14,102 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 21:03:14,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:14,141 INFO L225 Difference]: With dead ends: 22708 [2021-06-05 21:03:14,141 INFO L226 Difference]: Without dead ends: 22654 [2021-06-05 21:03:14,141 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 728 ImplicationChecksByTransitivity, 767.7ms TimeCoverageRelationStatistics Valid=535, Invalid=1817, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 21:03:14,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22654 states. [2021-06-05 21:03:14,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22654 to 15246. [2021-06-05 21:03:14,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15246 states, 15245 states have (on average 2.8751065923253525) internal successors, (43831), 15245 states have internal predecessors, (43831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:14,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15246 states to 15246 states and 43831 transitions. [2021-06-05 21:03:14,409 INFO L78 Accepts]: Start accepts. Automaton has 15246 states and 43831 transitions. Word has length 32 [2021-06-05 21:03:14,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:14,409 INFO L482 AbstractCegarLoop]: Abstraction has 15246 states and 43831 transitions. [2021-06-05 21:03:14,409 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:14,409 INFO L276 IsEmpty]: Start isEmpty. Operand 15246 states and 43831 transitions. [2021-06-05 21:03:14,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 21:03:14,415 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:14,415 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:03:14,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-06-05 21:03:14,616 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:14,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:14,616 INFO L82 PathProgramCache]: Analyzing trace with hash -639720651, now seen corresponding path program 9 times [2021-06-05 21:03:14,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:14,616 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98567155] [2021-06-05 21:03:14,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:14,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:14,683 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:03:14,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:14,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98567155] [2021-06-05 21:03:14,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98567155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:14,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180531351] [2021-06-05 21:03:14,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:14,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 21:03:14,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:03:14,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:03:14,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:03:14,774 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:03:14,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180531351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:14,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:03:14,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 21:03:14,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557305780] [2021-06-05 21:03:14,774 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:03:14,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:14,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:03:14,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:03:14,775 INFO L87 Difference]: Start difference. First operand 15246 states and 43831 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:15,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:15,236 INFO L93 Difference]: Finished difference Result 15940 states and 45262 transitions. [2021-06-05 21:03:15,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:03:15,236 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 21:03:15,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:15,265 INFO L225 Difference]: With dead ends: 15940 [2021-06-05 21:03:15,265 INFO L226 Difference]: Without dead ends: 15903 [2021-06-05 21:03:15,265 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 217.5ms TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:03:15,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15903 states. [2021-06-05 21:03:15,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15903 to 15141. [2021-06-05 21:03:15,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15141 states, 15140 states have (on average 2.8762879788639366) internal successors, (43547), 15140 states have internal predecessors, (43547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:15,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15141 states to 15141 states and 43547 transitions. [2021-06-05 21:03:15,491 INFO L78 Accepts]: Start accepts. Automaton has 15141 states and 43547 transitions. Word has length 35 [2021-06-05 21:03:15,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:15,492 INFO L482 AbstractCegarLoop]: Abstraction has 15141 states and 43547 transitions. [2021-06-05 21:03:15,492 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:15,492 INFO L276 IsEmpty]: Start isEmpty. Operand 15141 states and 43547 transitions. [2021-06-05 21:03:15,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 21:03:15,498 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:15,498 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:03:15,698 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:15,698 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:15,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:15,699 INFO L82 PathProgramCache]: Analyzing trace with hash 827459317, now seen corresponding path program 14 times [2021-06-05 21:03:15,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:15,699 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324591846] [2021-06-05 21:03:15,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:15,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:15,785 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:03:15,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:15,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324591846] [2021-06-05 21:03:15,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324591846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:15,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680557459] [2021-06-05 21:03:15,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 21:03:15,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:03:15,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:03:15,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:03:15,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:03:15,971 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:03:15,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680557459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:15,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:03:15,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 21:03:15,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379301906] [2021-06-05 21:03:15,972 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:03:15,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:15,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:03:15,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:03:15,972 INFO L87 Difference]: Start difference. First operand 15141 states and 43547 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:16,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:16,412 INFO L93 Difference]: Finished difference Result 15119 states and 43386 transitions. [2021-06-05 21:03:16,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:03:16,412 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 21:03:16,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:16,433 INFO L225 Difference]: With dead ends: 15119 [2021-06-05 21:03:16,434 INFO L226 Difference]: Without dead ends: 15016 [2021-06-05 21:03:16,434 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 129.3ms TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:03:16,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15016 states. [2021-06-05 21:03:16,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15016 to 14977. [2021-06-05 21:03:16,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14977 states, 14976 states have (on average 2.878605769230769) internal successors, (43110), 14976 states have internal predecessors, (43110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:16,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14977 states to 14977 states and 43110 transitions. [2021-06-05 21:03:16,638 INFO L78 Accepts]: Start accepts. Automaton has 14977 states and 43110 transitions. Word has length 35 [2021-06-05 21:03:16,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:16,638 INFO L482 AbstractCegarLoop]: Abstraction has 14977 states and 43110 transitions. [2021-06-05 21:03:16,638 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:16,638 INFO L276 IsEmpty]: Start isEmpty. Operand 14977 states and 43110 transitions. [2021-06-05 21:03:16,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 21:03:16,645 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:16,645 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:03:16,846 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-06-05 21:03:16,847 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:16,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:16,847 INFO L82 PathProgramCache]: Analyzing trace with hash 999532737, now seen corresponding path program 15 times [2021-06-05 21:03:16,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:16,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433812796] [2021-06-05 21:03:16,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:16,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:16,911 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:03:16,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:16,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433812796] [2021-06-05 21:03:16,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433812796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:16,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962897331] [2021-06-05 21:03:16,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:16,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 21:03:16,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:03:16,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:03:16,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:03:17,072 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:03:17,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962897331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:17,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:03:17,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 21:03:17,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082806321] [2021-06-05 21:03:17,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:03:17,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:17,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:03:17,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:03:17,073 INFO L87 Difference]: Start difference. First operand 14977 states and 43110 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:17,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:17,232 INFO L93 Difference]: Finished difference Result 15202 states and 43548 transitions. [2021-06-05 21:03:17,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:03:17,233 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 21:03:17,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:17,253 INFO L225 Difference]: With dead ends: 15202 [2021-06-05 21:03:17,253 INFO L226 Difference]: Without dead ends: 15202 [2021-06-05 21:03:17,254 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 153.8ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:03:17,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15202 states. [2021-06-05 21:03:17,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15202 to 14977. [2021-06-05 21:03:17,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14977 states, 14976 states have (on average 2.878605769230769) internal successors, (43110), 14976 states have internal predecessors, (43110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:17,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14977 states to 14977 states and 43110 transitions. [2021-06-05 21:03:17,459 INFO L78 Accepts]: Start accepts. Automaton has 14977 states and 43110 transitions. Word has length 35 [2021-06-05 21:03:17,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:17,459 INFO L482 AbstractCegarLoop]: Abstraction has 14977 states and 43110 transitions. [2021-06-05 21:03:17,459 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) [2021-06-05 21:03:17,459 INFO L276 IsEmpty]: Start isEmpty. Operand 14977 states and 43110 transitions. [2021-06-05 21:03:17,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 21:03:17,464 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:17,464 INFO L554 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:03:17,665 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:17,665 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:17,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:17,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1845490552, now seen corresponding path program 10 times [2021-06-05 21:03:17,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:17,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545876909] [2021-06-05 21:03:17,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:17,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:17,739 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 27 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:03:17,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:17,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545876909] [2021-06-05 21:03:17,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545876909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:17,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512642486] [2021-06-05 21:03:17,740 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 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 [2021-06-05 21:03:17,763 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:03:17,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:03:17,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:03:17,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:03:17,828 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 27 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:03:17,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512642486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:17,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:03:17,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 11 [2021-06-05 21:03:17,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754489550] [2021-06-05 21:03:17,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:03:17,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:17,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:03:17,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:03:17,830 INFO L87 Difference]: Start difference. First operand 14977 states and 43110 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:18,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:18,057 INFO L93 Difference]: Finished difference Result 16718 states and 46945 transitions. [2021-06-05 21:03:18,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:03:18,058 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 21:03:18,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:18,093 INFO L225 Difference]: With dead ends: 16718 [2021-06-05 21:03:18,094 INFO L226 Difference]: Without dead ends: 16694 [2021-06-05 21:03:18,094 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 107.1ms TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:03:18,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16694 states. [2021-06-05 21:03:18,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16694 to 15013. [2021-06-05 21:03:18,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15013 states, 15012 states have (on average 2.8758326671995738) internal successors, (43172), 15012 states have internal predecessors, (43172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:18,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15013 states to 15013 states and 43172 transitions. [2021-06-05 21:03:18,335 INFO L78 Accepts]: Start accepts. Automaton has 15013 states and 43172 transitions. Word has length 35 [2021-06-05 21:03:18,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:18,335 INFO L482 AbstractCegarLoop]: Abstraction has 15013 states and 43172 transitions. [2021-06-05 21:03:18,335 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:18,335 INFO L276 IsEmpty]: Start isEmpty. Operand 15013 states and 43172 transitions. [2021-06-05 21:03:18,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 21:03:18,341 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:18,341 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:03:18,542 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:18,543 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:18,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:18,554 INFO L82 PathProgramCache]: Analyzing trace with hash -731106251, now seen corresponding path program 16 times [2021-06-05 21:03:18,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:18,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134257831] [2021-06-05 21:03:18,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:18,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:18,690 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:03:18,691 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:18,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134257831] [2021-06-05 21:03:18,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134257831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:18,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554334355] [2021-06-05 21:03:18,691 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 [2021-06-05 21:03:18,720 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:03:18,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:03:18,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:03:18,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:03:18,861 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:03:18,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554334355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:18,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:03:18,861 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-06-05 21:03:18,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891639261] [2021-06-05 21:03:18,861 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:03:18,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:18,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:03:18,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:03:18,862 INFO L87 Difference]: Start difference. First operand 15013 states and 43172 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:19,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:19,290 INFO L93 Difference]: Finished difference Result 15432 states and 43972 transitions. [2021-06-05 21:03:19,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:03:19,291 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 21:03:19,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:19,322 INFO L225 Difference]: With dead ends: 15432 [2021-06-05 21:03:19,323 INFO L226 Difference]: Without dead ends: 15289 [2021-06-05 21:03:19,323 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 86.2ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:03:19,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15289 states. [2021-06-05 21:03:19,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15289 to 14996. [2021-06-05 21:03:19,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14996 states, 14995 states have (on average 2.8635545181727244) internal successors, (42939), 14995 states have internal predecessors, (42939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:19,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14996 states to 14996 states and 42939 transitions. [2021-06-05 21:03:19,571 INFO L78 Accepts]: Start accepts. Automaton has 14996 states and 42939 transitions. Word has length 35 [2021-06-05 21:03:19,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:19,571 INFO L482 AbstractCegarLoop]: Abstraction has 14996 states and 42939 transitions. [2021-06-05 21:03:19,571 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:19,571 INFO L276 IsEmpty]: Start isEmpty. Operand 14996 states and 42939 transitions. [2021-06-05 21:03:19,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 21:03:19,577 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:19,578 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:03:19,778 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-06-05 21:03:19,778 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:19,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:19,778 INFO L82 PathProgramCache]: Analyzing trace with hash -1344642431, now seen corresponding path program 17 times [2021-06-05 21:03:19,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:19,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143519710] [2021-06-05 21:03:19,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:19,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:19,839 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 27 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:03:19,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:19,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143519710] [2021-06-05 21:03:19,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143519710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:19,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248559707] [2021-06-05 21:03:19,839 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 [2021-06-05 21:03:19,880 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 21:03:19,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:03:19,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:03:19,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:03:19,947 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:03:19,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248559707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:19,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:03:19,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 21:03:19,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227831629] [2021-06-05 21:03:19,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:03:19,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:19,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:03:19,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:03:19,948 INFO L87 Difference]: Start difference. First operand 14996 states and 42939 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:20,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:20,142 INFO L93 Difference]: Finished difference Result 15805 states and 44721 transitions. [2021-06-05 21:03:20,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:03:20,143 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 21:03:20,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:20,163 INFO L225 Difference]: With dead ends: 15805 [2021-06-05 21:03:20,163 INFO L226 Difference]: Without dead ends: 15793 [2021-06-05 21:03:20,163 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 75.3ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:03:20,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15793 states. [2021-06-05 21:03:20,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15793 to 15263. [2021-06-05 21:03:20,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15263 states, 15262 states have (on average 2.8567029222906566) internal successors, (43599), 15262 states have internal predecessors, (43599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:20,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15263 states to 15263 states and 43599 transitions. [2021-06-05 21:03:20,381 INFO L78 Accepts]: Start accepts. Automaton has 15263 states and 43599 transitions. Word has length 35 [2021-06-05 21:03:20,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:20,381 INFO L482 AbstractCegarLoop]: Abstraction has 15263 states and 43599 transitions. [2021-06-05 21:03:20,381 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:20,382 INFO L276 IsEmpty]: Start isEmpty. Operand 15263 states and 43599 transitions. [2021-06-05 21:03:20,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 21:03:20,388 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:20,388 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:03:20,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-06-05 21:03:20,588 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:20,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:20,589 INFO L82 PathProgramCache]: Analyzing trace with hash 797274903, now seen corresponding path program 18 times [2021-06-05 21:03:20,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:20,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14420296] [2021-06-05 21:03:20,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:20,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:20,645 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:03:20,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:20,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14420296] [2021-06-05 21:03:20,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14420296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:20,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144224083] [2021-06-05 21:03:20,645 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 [2021-06-05 21:03:20,687 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 21:03:20,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:03:20,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:03:20,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:03:20,750 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:03:20,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144224083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:20,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:03:20,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 21:03:20,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212760478] [2021-06-05 21:03:20,750 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:03:20,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:20,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:03:20,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:03:20,751 INFO L87 Difference]: Start difference. First operand 15263 states and 43599 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:21,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:21,078 INFO L93 Difference]: Finished difference Result 16259 states and 45639 transitions. [2021-06-05 21:03:21,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:03:21,079 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 21:03:21,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:21,099 INFO L225 Difference]: With dead ends: 16259 [2021-06-05 21:03:21,099 INFO L226 Difference]: Without dead ends: 16247 [2021-06-05 21:03:21,099 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 94.2ms TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:03:21,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16247 states. [2021-06-05 21:03:21,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16247 to 14972. [2021-06-05 21:03:21,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14972 states, 14971 states have (on average 2.854652327833812) internal successors, (42737), 14971 states have internal predecessors, (42737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:21,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14972 states to 14972 states and 42737 transitions. [2021-06-05 21:03:21,352 INFO L78 Accepts]: Start accepts. Automaton has 14972 states and 42737 transitions. Word has length 35 [2021-06-05 21:03:21,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:21,353 INFO L482 AbstractCegarLoop]: Abstraction has 14972 states and 42737 transitions. [2021-06-05 21:03:21,353 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:21,353 INFO L276 IsEmpty]: Start isEmpty. Operand 14972 states and 42737 transitions. [2021-06-05 21:03:21,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 21:03:21,360 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:21,361 INFO L554 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:03:21,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:21,577 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:21,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:21,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1965133284, now seen corresponding path program 19 times [2021-06-05 21:03:21,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:21,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228731252] [2021-06-05 21:03:21,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:21,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:21,633 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 19 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:03:21,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:21,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228731252] [2021-06-05 21:03:21,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228731252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:21,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408761026] [2021-06-05 21:03:21,634 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 21:03:21,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:21,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:03:21,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:03:21,732 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 19 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:03:21,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408761026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:21,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:03:21,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 21:03:21,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689063743] [2021-06-05 21:03:21,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:03:21,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:21,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:03:21,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:03:21,734 INFO L87 Difference]: Start difference. First operand 14972 states and 42737 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:21,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:21,928 INFO L93 Difference]: Finished difference Result 15256 states and 43217 transitions. [2021-06-05 21:03:21,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:03:21,928 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 21:03:21,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:21,952 INFO L225 Difference]: With dead ends: 15256 [2021-06-05 21:03:21,952 INFO L226 Difference]: Without dead ends: 15235 [2021-06-05 21:03:21,952 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 70.0ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:03:21,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15235 states. [2021-06-05 21:03:22,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15235 to 14340. [2021-06-05 21:03:22,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14340 states, 14339 states have (on average 2.861078178394588) internal successors, (41025), 14339 states have internal predecessors, (41025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:22,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14340 states to 14340 states and 41025 transitions. [2021-06-05 21:03:22,163 INFO L78 Accepts]: Start accepts. Automaton has 14340 states and 41025 transitions. Word has length 35 [2021-06-05 21:03:22,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:22,163 INFO L482 AbstractCegarLoop]: Abstraction has 14340 states and 41025 transitions. [2021-06-05 21:03:22,163 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:22,164 INFO L276 IsEmpty]: Start isEmpty. Operand 14340 states and 41025 transitions. [2021-06-05 21:03:22,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 21:03:22,169 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:22,169 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:03:22,369 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-06-05 21:03:22,370 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:22,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:22,370 INFO L82 PathProgramCache]: Analyzing trace with hash -729647013, now seen corresponding path program 11 times [2021-06-05 21:03:22,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:22,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758690936] [2021-06-05 21:03:22,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:22,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:22,431 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 33 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:03:22,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:22,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758690936] [2021-06-05 21:03:22,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758690936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:22,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746684952] [2021-06-05 21:03:22,431 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:22,458 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 21:03:22,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:03:22,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:03:22,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:03:22,509 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:03:22,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746684952] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:22,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:03:22,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 21:03:22,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001758537] [2021-06-05 21:03:22,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:03:22,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:22,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:03:22,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:03:22,510 INFO L87 Difference]: Start difference. First operand 14340 states and 41025 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:22,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:22,707 INFO L93 Difference]: Finished difference Result 15289 states and 42956 transitions. [2021-06-05 21:03:22,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:03:22,707 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 21:03:22,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:22,726 INFO L225 Difference]: With dead ends: 15289 [2021-06-05 21:03:22,726 INFO L226 Difference]: Without dead ends: 15273 [2021-06-05 21:03:22,726 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 68.6ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:03:22,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15273 states. [2021-06-05 21:03:22,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15273 to 14606. [2021-06-05 21:03:22,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14606 states, 14605 states have (on average 2.8478603218076) internal successors, (41593), 14605 states have internal predecessors, (41593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:22,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14606 states to 14606 states and 41593 transitions. [2021-06-05 21:03:22,926 INFO L78 Accepts]: Start accepts. Automaton has 14606 states and 41593 transitions. Word has length 35 [2021-06-05 21:03:22,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:22,926 INFO L482 AbstractCegarLoop]: Abstraction has 14606 states and 41593 transitions. [2021-06-05 21:03:22,926 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:22,926 INFO L276 IsEmpty]: Start isEmpty. Operand 14606 states and 41593 transitions. [2021-06-05 21:03:22,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 21:03:22,931 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:22,931 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:03:23,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:23,132 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:23,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:23,132 INFO L82 PathProgramCache]: Analyzing trace with hash 770685979, now seen corresponding path program 20 times [2021-06-05 21:03:23,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:23,132 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256466175] [2021-06-05 21:03:23,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:23,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:23,181 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:03:23,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:23,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256466175] [2021-06-05 21:03:23,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256466175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:23,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66686474] [2021-06-05 21:03:23,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:23,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:03:23,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:03:23,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:03:23,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:03:23,273 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:03:23,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66686474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:23,273 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:03:23,273 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-06-05 21:03:23,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006510532] [2021-06-05 21:03:23,274 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:03:23,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:23,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:03:23,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:03:23,274 INFO L87 Difference]: Start difference. First operand 14606 states and 41593 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:23,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:23,589 INFO L93 Difference]: Finished difference Result 14012 states and 39306 transitions. [2021-06-05 21:03:23,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:03:23,589 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 21:03:23,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:23,607 INFO L225 Difference]: With dead ends: 14012 [2021-06-05 21:03:23,608 INFO L226 Difference]: Without dead ends: 13783 [2021-06-05 21:03:23,608 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 73.3ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:03:23,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13783 states. [2021-06-05 21:03:23,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13783 to 13424. [2021-06-05 21:03:23,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13424 states, 13423 states have (on average 2.8016091782760935) internal successors, (37606), 13423 states have internal predecessors, (37606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:23,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13424 states to 13424 states and 37606 transitions. [2021-06-05 21:03:23,799 INFO L78 Accepts]: Start accepts. Automaton has 13424 states and 37606 transitions. Word has length 35 [2021-06-05 21:03:23,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:23,799 INFO L482 AbstractCegarLoop]: Abstraction has 13424 states and 37606 transitions. [2021-06-05 21:03:23,799 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:23,799 INFO L276 IsEmpty]: Start isEmpty. Operand 13424 states and 37606 transitions. [2021-06-05 21:03:23,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 21:03:23,804 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:23,804 INFO L554 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:03:24,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:24,005 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:24,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:24,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1491207704, now seen corresponding path program 21 times [2021-06-05 21:03:24,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:24,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165540596] [2021-06-05 21:03:24,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:24,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:24,040 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 14 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:03:24,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:24,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165540596] [2021-06-05 21:03:24,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165540596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:24,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649139155] [2021-06-05 21:03:24,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:24,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:03:24,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:03:24,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:03:24,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:03:24,127 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 14 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:03:24,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649139155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:24,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:03:24,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 21:03:24,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465489706] [2021-06-05 21:03:24,128 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:03:24,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:24,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:03:24,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:03:24,129 INFO L87 Difference]: Start difference. First operand 13424 states and 37606 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:24,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:24,275 INFO L93 Difference]: Finished difference Result 14007 states and 38649 transitions. [2021-06-05 21:03:24,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:03:24,276 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 21:03:24,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:24,294 INFO L225 Difference]: With dead ends: 14007 [2021-06-05 21:03:24,295 INFO L226 Difference]: Without dead ends: 13986 [2021-06-05 21:03:24,295 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 47.7ms TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:03:24,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13986 states. [2021-06-05 21:03:24,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13986 to 13395. [2021-06-05 21:03:24,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13395 states, 13394 states have (on average 2.7938629236971777) internal successors, (37421), 13394 states have internal predecessors, (37421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:24,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13395 states to 13395 states and 37421 transitions. [2021-06-05 21:03:24,482 INFO L78 Accepts]: Start accepts. Automaton has 13395 states and 37421 transitions. Word has length 35 [2021-06-05 21:03:24,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:24,483 INFO L482 AbstractCegarLoop]: Abstraction has 13395 states and 37421 transitions. [2021-06-05 21:03:24,483 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:24,483 INFO L276 IsEmpty]: Start isEmpty. Operand 13395 states and 37421 transitions. [2021-06-05 21:03:24,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 21:03:24,487 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:24,488 INFO L554 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:03:24,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:24,688 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:24,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:24,688 INFO L82 PathProgramCache]: Analyzing trace with hash -463341054, now seen corresponding path program 22 times [2021-06-05 21:03:24,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:24,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167158565] [2021-06-05 21:03:24,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:24,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:24,738 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 13 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:03:24,738 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:24,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167158565] [2021-06-05 21:03:24,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167158565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:24,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392353611] [2021-06-05 21:03:24,739 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:24,762 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:03:24,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:03:24,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:03:24,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:03:24,831 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 13 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:03:24,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392353611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:24,831 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:03:24,831 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 21:03:24,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206579189] [2021-06-05 21:03:24,831 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:03:24,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:24,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:03:24,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:03:24,832 INFO L87 Difference]: Start difference. First operand 13395 states and 37421 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:25,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:25,000 INFO L93 Difference]: Finished difference Result 13987 states and 38480 transitions. [2021-06-05 21:03:25,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:03:25,001 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 21:03:25,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:25,019 INFO L225 Difference]: With dead ends: 13987 [2021-06-05 21:03:25,019 INFO L226 Difference]: Without dead ends: 13963 [2021-06-05 21:03:25,019 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 70.1ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:03:25,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13963 states. [2021-06-05 21:03:25,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13963 to 12486. [2021-06-05 21:03:25,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12486 states, 12485 states have (on average 2.7947937525030038) internal successors, (34893), 12485 states have internal predecessors, (34893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:25,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12486 states to 12486 states and 34893 transitions. [2021-06-05 21:03:25,192 INFO L78 Accepts]: Start accepts. Automaton has 12486 states and 34893 transitions. Word has length 35 [2021-06-05 21:03:25,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:25,192 INFO L482 AbstractCegarLoop]: Abstraction has 12486 states and 34893 transitions. [2021-06-05 21:03:25,192 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:25,192 INFO L276 IsEmpty]: Start isEmpty. Operand 12486 states and 34893 transitions. [2021-06-05 21:03:25,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 21:03:25,197 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:25,197 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:03:25,397 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-06-05 21:03:25,397 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:25,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:25,398 INFO L82 PathProgramCache]: Analyzing trace with hash -1841063629, now seen corresponding path program 23 times [2021-06-05 21:03:25,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:25,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133036980] [2021-06-05 21:03:25,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:25,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:25,461 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:03:25,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:25,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133036980] [2021-06-05 21:03:25,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133036980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:25,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703275390] [2021-06-05 21:03:25,462 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 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 [2021-06-05 21:03:25,494 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 21:03:25,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:03:25,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:03:25,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:03:25,554 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:03:25,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703275390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:25,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:03:25,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 21:03:25,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360012250] [2021-06-05 21:03:25,554 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:03:25,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:25,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:03:25,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:03:25,554 INFO L87 Difference]: Start difference. First operand 12486 states and 34893 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:25,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:25,851 INFO L93 Difference]: Finished difference Result 12918 states and 35022 transitions. [2021-06-05 21:03:25,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:03:25,851 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 21:03:25,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:25,866 INFO L225 Difference]: With dead ends: 12918 [2021-06-05 21:03:25,866 INFO L226 Difference]: Without dead ends: 12852 [2021-06-05 21:03:25,866 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 120.1ms TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:03:25,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12852 states. [2021-06-05 21:03:25,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12852 to 9736. [2021-06-05 21:03:25,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9736 states, 9735 states have (on average 2.787057010785824) internal successors, (27132), 9735 states have internal predecessors, (27132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:26,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9736 states to 9736 states and 27132 transitions. [2021-06-05 21:03:26,014 INFO L78 Accepts]: Start accepts. Automaton has 9736 states and 27132 transitions. Word has length 35 [2021-06-05 21:03:26,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:26,014 INFO L482 AbstractCegarLoop]: Abstraction has 9736 states and 27132 transitions. [2021-06-05 21:03:26,014 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:26,014 INFO L276 IsEmpty]: Start isEmpty. Operand 9736 states and 27132 transitions. [2021-06-05 21:03:26,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 21:03:26,018 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:26,018 INFO L554 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:03:26,218 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:26,218 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:26,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:26,218 INFO L82 PathProgramCache]: Analyzing trace with hash -1454460952, now seen corresponding path program 24 times [2021-06-05 21:03:26,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:26,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712688072] [2021-06-05 21:03:26,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:26,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:26,280 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:03:26,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:26,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712688072] [2021-06-05 21:03:26,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712688072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:26,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141836817] [2021-06-05 21:03:26,281 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:26,326 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:03:26,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:03:26,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:03:26,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:03:26,381 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:03:26,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141836817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:26,381 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:03:26,381 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 21:03:26,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286097689] [2021-06-05 21:03:26,381 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:03:26,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:26,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:03:26,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:03:26,382 INFO L87 Difference]: Start difference. First operand 9736 states and 27132 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:26,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:26,552 INFO L93 Difference]: Finished difference Result 10128 states and 27807 transitions. [2021-06-05 21:03:26,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:03:26,552 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 21:03:26,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:26,563 INFO L225 Difference]: With dead ends: 10128 [2021-06-05 21:03:26,564 INFO L226 Difference]: Without dead ends: 10101 [2021-06-05 21:03:26,564 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 86.2ms TimeCoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:03:26,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10101 states. [2021-06-05 21:03:26,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10101 to 9757. [2021-06-05 21:03:26,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9757 states, 9756 states have (on average 2.7809553095530957) internal successors, (27131), 9756 states have internal predecessors, (27131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:26,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9757 states to 9757 states and 27131 transitions. [2021-06-05 21:03:26,691 INFO L78 Accepts]: Start accepts. Automaton has 9757 states and 27131 transitions. Word has length 35 [2021-06-05 21:03:26,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:26,691 INFO L482 AbstractCegarLoop]: Abstraction has 9757 states and 27131 transitions. [2021-06-05 21:03:26,691 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:26,691 INFO L276 IsEmpty]: Start isEmpty. Operand 9757 states and 27131 transitions. [2021-06-05 21:03:26,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 21:03:26,695 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:26,695 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:03:26,895 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2021-06-05 21:03:26,896 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:26,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:26,896 INFO L82 PathProgramCache]: Analyzing trace with hash -208710795, now seen corresponding path program 12 times [2021-06-05 21:03:26,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:26,896 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270579730] [2021-06-05 21:03:26,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:26,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:26,953 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:03:26,953 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:26,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270579730] [2021-06-05 21:03:26,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270579730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:26,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351688081] [2021-06-05 21:03:26,953 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:26,978 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 21:03:26,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:03:26,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:03:26,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:03:27,026 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:03:27,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351688081] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:27,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:03:27,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 21:03:27,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970681117] [2021-06-05 21:03:27,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:03:27,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:27,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:03:27,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:03:27,027 INFO L87 Difference]: Start difference. First operand 9757 states and 27131 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:27,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:27,276 INFO L93 Difference]: Finished difference Result 10449 states and 28483 transitions. [2021-06-05 21:03:27,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:03:27,277 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 21:03:27,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:27,290 INFO L225 Difference]: With dead ends: 10449 [2021-06-05 21:03:27,291 INFO L226 Difference]: Without dead ends: 10431 [2021-06-05 21:03:27,291 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 109.1ms TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:03:27,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10431 states. [2021-06-05 21:03:27,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10431 to 9155. [2021-06-05 21:03:27,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9155 states, 9154 states have (on average 2.7968101376447456) internal successors, (25602), 9154 states have internal predecessors, (25602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:27,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9155 states to 9155 states and 25602 transitions. [2021-06-05 21:03:27,414 INFO L78 Accepts]: Start accepts. Automaton has 9155 states and 25602 transitions. Word has length 35 [2021-06-05 21:03:27,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:27,414 INFO L482 AbstractCegarLoop]: Abstraction has 9155 states and 25602 transitions. [2021-06-05 21:03:27,414 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:27,414 INFO L276 IsEmpty]: Start isEmpty. Operand 9155 states and 25602 transitions. [2021-06-05 21:03:27,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 21:03:27,418 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:27,418 INFO L554 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:03:27,618 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-06-05 21:03:27,619 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:27,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:27,619 INFO L82 PathProgramCache]: Analyzing trace with hash -305893054, now seen corresponding path program 25 times [2021-06-05 21:03:27,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:27,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950416588] [2021-06-05 21:03:27,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:27,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:27,642 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-06-05 21:03:27,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:27,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950416588] [2021-06-05 21:03:27,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950416588] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:03:27,642 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:03:27,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 21:03:27,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486578500] [2021-06-05 21:03:27,643 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 21:03:27,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:27,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 21:03:27,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 21:03:27,643 INFO L87 Difference]: Start difference. First operand 9155 states and 25602 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:27,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:27,665 INFO L93 Difference]: Finished difference Result 2349 states and 5506 transitions. [2021-06-05 21:03:27,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 21:03:27,665 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 21:03:27,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:27,667 INFO L225 Difference]: With dead ends: 2349 [2021-06-05 21:03:27,668 INFO L226 Difference]: Without dead ends: 2331 [2021-06-05 21:03:27,668 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 21:03:27,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2331 states. [2021-06-05 21:03:27,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2331 to 1380. [2021-06-05 21:03:27,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1380 states, 1379 states have (on average 2.3343002175489485) internal successors, (3219), 1379 states have internal predecessors, (3219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:27,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1380 states to 1380 states and 3219 transitions. [2021-06-05 21:03:27,688 INFO L78 Accepts]: Start accepts. Automaton has 1380 states and 3219 transitions. Word has length 35 [2021-06-05 21:03:27,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:27,688 INFO L482 AbstractCegarLoop]: Abstraction has 1380 states and 3219 transitions. [2021-06-05 21:03:27,688 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:27,688 INFO L276 IsEmpty]: Start isEmpty. Operand 1380 states and 3219 transitions. [2021-06-05 21:03:27,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 21:03:27,689 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:27,689 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:03:27,690 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2021-06-05 21:03:27,690 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:27,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:27,690 INFO L82 PathProgramCache]: Analyzing trace with hash -385601739, now seen corresponding path program 26 times [2021-06-05 21:03:27,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:27,690 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606211040] [2021-06-05 21:03:27,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:27,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:27,777 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:03:27,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:27,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606211040] [2021-06-05 21:03:27,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606211040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:27,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362222438] [2021-06-05 21:03:27,777 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:27,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:03:27,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:03:27,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:03:27,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:03:27,925 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:03:27,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362222438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:27,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:03:27,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 21:03:27,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606311190] [2021-06-05 21:03:27,925 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:03:27,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:27,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:03:27,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:03:27,926 INFO L87 Difference]: Start difference. First operand 1380 states and 3219 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:28,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:28,118 INFO L93 Difference]: Finished difference Result 1429 states and 3294 transitions. [2021-06-05 21:03:28,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:03:28,119 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 21:03:28,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:28,120 INFO L225 Difference]: With dead ends: 1429 [2021-06-05 21:03:28,120 INFO L226 Difference]: Without dead ends: 1397 [2021-06-05 21:03:28,120 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 93.0ms TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:03:28,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1397 states. [2021-06-05 21:03:28,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1397 to 1380. [2021-06-05 21:03:28,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1380 states, 1379 states have (on average 2.3299492385786804) internal successors, (3213), 1379 states have internal predecessors, (3213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:28,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1380 states to 1380 states and 3213 transitions. [2021-06-05 21:03:28,130 INFO L78 Accepts]: Start accepts. Automaton has 1380 states and 3213 transitions. Word has length 35 [2021-06-05 21:03:28,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:28,131 INFO L482 AbstractCegarLoop]: Abstraction has 1380 states and 3213 transitions. [2021-06-05 21:03:28,131 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:28,131 INFO L276 IsEmpty]: Start isEmpty. Operand 1380 states and 3213 transitions. [2021-06-05 21:03:28,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 21:03:28,132 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:28,132 INFO L554 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:03:28,341 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-06-05 21:03:28,341 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:28,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:28,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1551170986, now seen corresponding path program 27 times [2021-06-05 21:03:28,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:28,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403850271] [2021-06-05 21:03:28,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:28,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:28,391 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:03:28,391 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:28,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403850271] [2021-06-05 21:03:28,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403850271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:28,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773739307] [2021-06-05 21:03:28,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:28,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 21:03:28,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:03:28,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:03:28,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:03:28,472 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:03:28,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773739307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:28,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:03:28,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 21:03:28,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167687539] [2021-06-05 21:03:28,472 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:03:28,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:28,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:03:28,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:03:28,473 INFO L87 Difference]: Start difference. First operand 1380 states and 3213 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:28,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:28,602 INFO L93 Difference]: Finished difference Result 2071 states and 4706 transitions. [2021-06-05 21:03:28,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:03:28,602 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 21:03:28,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:28,604 INFO L225 Difference]: With dead ends: 2071 [2021-06-05 21:03:28,604 INFO L226 Difference]: Without dead ends: 2071 [2021-06-05 21:03:28,604 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 64.1ms TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:03:28,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2071 states. [2021-06-05 21:03:28,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2071 to 1527. [2021-06-05 21:03:28,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1527 states, 1526 states have (on average 2.4023591087811274) internal successors, (3666), 1526 states have internal predecessors, (3666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:28,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1527 states to 1527 states and 3666 transitions. [2021-06-05 21:03:28,618 INFO L78 Accepts]: Start accepts. Automaton has 1527 states and 3666 transitions. Word has length 35 [2021-06-05 21:03:28,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:28,618 INFO L482 AbstractCegarLoop]: Abstraction has 1527 states and 3666 transitions. [2021-06-05 21:03:28,618 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:28,618 INFO L276 IsEmpty]: Start isEmpty. Operand 1527 states and 3666 transitions. [2021-06-05 21:03:28,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 21:03:28,619 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:28,619 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:03:28,819 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:28,820 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:28,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:28,820 INFO L82 PathProgramCache]: Analyzing trace with hash 780335319, now seen corresponding path program 13 times [2021-06-05 21:03:28,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:28,820 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441784036] [2021-06-05 21:03:28,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:28,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:28,890 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:03:28,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:28,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441784036] [2021-06-05 21:03:28,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441784036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:28,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238685890] [2021-06-05 21:03:28,891 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:28,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:28,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:03:28,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:03:28,964 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:03:28,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238685890] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:28,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:03:28,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 21:03:28,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497108097] [2021-06-05 21:03:28,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:03:28,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:28,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:03:28,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:03:28,965 INFO L87 Difference]: Start difference. First operand 1527 states and 3666 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:29,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:29,143 INFO L93 Difference]: Finished difference Result 1909 states and 4411 transitions. [2021-06-05 21:03:29,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:03:29,144 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 21:03:29,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:29,145 INFO L225 Difference]: With dead ends: 1909 [2021-06-05 21:03:29,145 INFO L226 Difference]: Without dead ends: 1905 [2021-06-05 21:03:29,145 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 85.2ms TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:03:29,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1905 states. [2021-06-05 21:03:29,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1905 to 1526. [2021-06-05 21:03:29,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1526 states, 1525 states have (on average 2.40327868852459) internal successors, (3665), 1525 states have internal predecessors, (3665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:29,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1526 states to 1526 states and 3665 transitions. [2021-06-05 21:03:29,159 INFO L78 Accepts]: Start accepts. Automaton has 1526 states and 3665 transitions. Word has length 35 [2021-06-05 21:03:29,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:29,159 INFO L482 AbstractCegarLoop]: Abstraction has 1526 states and 3665 transitions. [2021-06-05 21:03:29,159 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:29,159 INFO L276 IsEmpty]: Start isEmpty. Operand 1526 states and 3665 transitions. [2021-06-05 21:03:29,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 21:03:29,160 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:29,160 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:03:29,361 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:29,361 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:29,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:29,361 INFO L82 PathProgramCache]: Analyzing trace with hash -852961065, now seen corresponding path program 28 times [2021-06-05 21:03:29,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:29,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109071712] [2021-06-05 21:03:29,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:29,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:29,426 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:03:29,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:29,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109071712] [2021-06-05 21:03:29,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109071712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:29,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776326070] [2021-06-05 21:03:29,427 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:29,464 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:03:29,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:03:29,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:03:29,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:03:29,573 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:03:29,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776326070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:29,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:03:29,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 21:03:29,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541005420] [2021-06-05 21:03:29,573 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:03:29,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:29,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:03:29,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:03:29,574 INFO L87 Difference]: Start difference. First operand 1526 states and 3665 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:29,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:29,720 INFO L93 Difference]: Finished difference Result 1563 states and 3719 transitions. [2021-06-05 21:03:29,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:03:29,721 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 21:03:29,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:29,722 INFO L225 Difference]: With dead ends: 1563 [2021-06-05 21:03:29,722 INFO L226 Difference]: Without dead ends: 1543 [2021-06-05 21:03:29,722 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 67.5ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:03:29,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1543 states. [2021-06-05 21:03:29,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1543 to 1526. [2021-06-05 21:03:29,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1526 states, 1525 states have (on average 2.401311475409836) internal successors, (3662), 1525 states have internal predecessors, (3662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:29,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1526 states to 1526 states and 3662 transitions. [2021-06-05 21:03:29,734 INFO L78 Accepts]: Start accepts. Automaton has 1526 states and 3662 transitions. Word has length 35 [2021-06-05 21:03:29,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:29,734 INFO L482 AbstractCegarLoop]: Abstraction has 1526 states and 3662 transitions. [2021-06-05 21:03:29,734 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:29,734 INFO L276 IsEmpty]: Start isEmpty. Operand 1526 states and 3662 transitions. [2021-06-05 21:03:29,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 21:03:29,735 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:29,736 INFO L554 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:03:29,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable171 [2021-06-05 21:03:29,936 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:29,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:29,936 INFO L82 PathProgramCache]: Analyzing trace with hash -1273583998, now seen corresponding path program 29 times [2021-06-05 21:03:29,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:29,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841564118] [2021-06-05 21:03:29,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:29,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:29,978 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:03:29,978 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:29,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841564118] [2021-06-05 21:03:29,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841564118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:29,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255217289] [2021-06-05 21:03:29,978 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:30,004 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 21:03:30,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:03:30,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:03:30,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:03:30,063 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 18 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:03:30,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255217289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:30,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:03:30,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 9 [2021-06-05 21:03:30,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124466804] [2021-06-05 21:03:30,064 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:03:30,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:30,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:03:30,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:03:30,065 INFO L87 Difference]: Start difference. First operand 1526 states and 3662 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:30,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:30,185 INFO L93 Difference]: Finished difference Result 2415 states and 5508 transitions. [2021-06-05 21:03:30,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:03:30,185 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 21:03:30,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:30,187 INFO L225 Difference]: With dead ends: 2415 [2021-06-05 21:03:30,187 INFO L226 Difference]: Without dead ends: 2415 [2021-06-05 21:03:30,187 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 47.8ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:03:30,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2415 states. [2021-06-05 21:03:30,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2415 to 1653. [2021-06-05 21:03:30,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1653 states, 1652 states have (on average 2.4473365617433416) internal successors, (4043), 1652 states have internal predecessors, (4043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:30,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1653 states to 1653 states and 4043 transitions. [2021-06-05 21:03:30,203 INFO L78 Accepts]: Start accepts. Automaton has 1653 states and 4043 transitions. Word has length 35 [2021-06-05 21:03:30,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:30,203 INFO L482 AbstractCegarLoop]: Abstraction has 1653 states and 4043 transitions. [2021-06-05 21:03:30,203 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:30,203 INFO L276 IsEmpty]: Start isEmpty. Operand 1653 states and 4043 transitions. [2021-06-05 21:03:30,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 21:03:30,204 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:30,204 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:03:30,405 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:30,405 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:30,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:30,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1511645515, now seen corresponding path program 14 times [2021-06-05 21:03:30,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:30,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220379650] [2021-06-05 21:03:30,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:30,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:30,461 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:03:30,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:30,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220379650] [2021-06-05 21:03:30,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220379650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:30,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945569201] [2021-06-05 21:03:30,461 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 [2021-06-05 21:03:30,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:03:30,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:03:30,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:03:30,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:03:30,552 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:03:30,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945569201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:30,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:03:30,552 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 21:03:30,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889597797] [2021-06-05 21:03:30,552 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:03:30,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:30,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:03:30,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:03:30,553 INFO L87 Difference]: Start difference. First operand 1653 states and 4043 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:30,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:30,760 INFO L93 Difference]: Finished difference Result 2638 states and 6132 transitions. [2021-06-05 21:03:30,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:03:30,760 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 21:03:30,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:30,762 INFO L225 Difference]: With dead ends: 2638 [2021-06-05 21:03:30,762 INFO L226 Difference]: Without dead ends: 2596 [2021-06-05 21:03:30,762 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 73.5ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:03:30,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2596 states. [2021-06-05 21:03:30,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2596 to 1819. [2021-06-05 21:03:30,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1819 states, 1818 states have (on average 2.4592959295929595) internal successors, (4471), 1818 states have internal predecessors, (4471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:30,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1819 states to 1819 states and 4471 transitions. [2021-06-05 21:03:30,781 INFO L78 Accepts]: Start accepts. Automaton has 1819 states and 4471 transitions. Word has length 35 [2021-06-05 21:03:30,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:30,781 INFO L482 AbstractCegarLoop]: Abstraction has 1819 states and 4471 transitions. [2021-06-05 21:03:30,781 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:30,781 INFO L276 IsEmpty]: Start isEmpty. Operand 1819 states and 4471 transitions. [2021-06-05 21:03:30,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 21:03:30,782 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:30,782 INFO L554 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:03:31,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:31,005 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:31,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:31,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1229624924, now seen corresponding path program 30 times [2021-06-05 21:03:31,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:31,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500127644] [2021-06-05 21:03:31,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:31,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:31,046 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 24 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:03:31,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:31,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500127644] [2021-06-05 21:03:31,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500127644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:31,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304435073] [2021-06-05 21:03:31,047 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:31,090 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 21:03:31,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:03:31,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:03:31,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:03:31,144 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 24 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:03:31,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304435073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:31,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:03:31,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 21:03:31,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729425157] [2021-06-05 21:03:31,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:03:31,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:31,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:03:31,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:03:31,145 INFO L87 Difference]: Start difference. First operand 1819 states and 4471 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:31,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:31,240 INFO L93 Difference]: Finished difference Result 2408 states and 5562 transitions. [2021-06-05 21:03:31,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 21:03:31,241 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 21:03:31,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:31,244 INFO L225 Difference]: With dead ends: 2408 [2021-06-05 21:03:31,244 INFO L226 Difference]: Without dead ends: 2405 [2021-06-05 21:03:31,244 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 38.8ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:03:31,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2405 states. [2021-06-05 21:03:31,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2405 to 1818. [2021-06-05 21:03:31,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1818 states, 1817 states have (on average 2.45789763346175) internal successors, (4466), 1817 states have internal predecessors, (4466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:31,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1818 states to 1818 states and 4466 transitions. [2021-06-05 21:03:31,266 INFO L78 Accepts]: Start accepts. Automaton has 1818 states and 4466 transitions. Word has length 35 [2021-06-05 21:03:31,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:31,266 INFO L482 AbstractCegarLoop]: Abstraction has 1818 states and 4466 transitions. [2021-06-05 21:03:31,266 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:31,266 INFO L276 IsEmpty]: Start isEmpty. Operand 1818 states and 4466 transitions. [2021-06-05 21:03:31,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 21:03:31,267 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:31,267 INFO L554 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:03:31,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:31,468 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:31,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:31,468 INFO L82 PathProgramCache]: Analyzing trace with hash 1436687490, now seen corresponding path program 31 times [2021-06-05 21:03:31,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:31,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471064378] [2021-06-05 21:03:31,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:31,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:31,513 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 20 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:03:31,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:31,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471064378] [2021-06-05 21:03:31,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471064378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:31,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462508580] [2021-06-05 21:03:31,514 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:31,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:31,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:03:31,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:03:31,584 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 20 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:03:31,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462508580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:31,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:03:31,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 21:03:31,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469492502] [2021-06-05 21:03:31,585 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:03:31,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:31,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:03:31,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:03:31,585 INFO L87 Difference]: Start difference. First operand 1818 states and 4466 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:31,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:31,689 INFO L93 Difference]: Finished difference Result 2608 states and 6106 transitions. [2021-06-05 21:03:31,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 21:03:31,690 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 21:03:31,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:31,692 INFO L225 Difference]: With dead ends: 2608 [2021-06-05 21:03:31,692 INFO L226 Difference]: Without dead ends: 2596 [2021-06-05 21:03:31,692 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 46.7ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:03:31,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2596 states. [2021-06-05 21:03:31,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2596 to 1953. [2021-06-05 21:03:31,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1953 states, 1952 states have (on average 2.4574795081967213) internal successors, (4797), 1952 states have internal predecessors, (4797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:31,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1953 states to 1953 states and 4797 transitions. [2021-06-05 21:03:31,712 INFO L78 Accepts]: Start accepts. Automaton has 1953 states and 4797 transitions. Word has length 35 [2021-06-05 21:03:31,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:31,712 INFO L482 AbstractCegarLoop]: Abstraction has 1953 states and 4797 transitions. [2021-06-05 21:03:31,712 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:31,712 INFO L276 IsEmpty]: Start isEmpty. Operand 1953 states and 4797 transitions. [2021-06-05 21:03:31,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 21:03:31,714 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:31,714 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:03:31,914 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:31,914 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:31,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:31,915 INFO L82 PathProgramCache]: Analyzing trace with hash -11312523, now seen corresponding path program 32 times [2021-06-05 21:03:31,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:31,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039074293] [2021-06-05 21:03:31,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:31,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:31,971 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 11 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:03:31,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:31,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039074293] [2021-06-05 21:03:31,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039074293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:31,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740485673] [2021-06-05 21:03:31,971 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:32,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:03:32,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:03:32,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:03:32,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:03:32,073 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:03:32,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740485673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:32,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:03:32,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-06-05 21:03:32,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101060868] [2021-06-05 21:03:32,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:03:32,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:32,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:03:32,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:03:32,075 INFO L87 Difference]: Start difference. First operand 1953 states and 4797 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:32,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:32,331 INFO L93 Difference]: Finished difference Result 2377 states and 5580 transitions. [2021-06-05 21:03:32,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:03:32,332 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 21:03:32,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:32,335 INFO L225 Difference]: With dead ends: 2377 [2021-06-05 21:03:32,335 INFO L226 Difference]: Without dead ends: 2298 [2021-06-05 21:03:32,335 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 79.9ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:03:32,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2298 states. [2021-06-05 21:03:32,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2298 to 2023. [2021-06-05 21:03:32,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2023 states, 2022 states have (on average 2.4416419386745796) internal successors, (4937), 2022 states have internal predecessors, (4937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:32,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2023 states to 2023 states and 4937 transitions. [2021-06-05 21:03:32,359 INFO L78 Accepts]: Start accepts. Automaton has 2023 states and 4937 transitions. Word has length 35 [2021-06-05 21:03:32,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:32,360 INFO L482 AbstractCegarLoop]: Abstraction has 2023 states and 4937 transitions. [2021-06-05 21:03:32,360 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:32,360 INFO L276 IsEmpty]: Start isEmpty. Operand 2023 states and 4937 transitions. [2021-06-05 21:03:32,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 21:03:32,362 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:32,362 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:03:32,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-06-05 21:03:32,581 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:32,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:32,581 INFO L82 PathProgramCache]: Analyzing trace with hash -624848703, now seen corresponding path program 33 times [2021-06-05 21:03:32,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:32,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987402118] [2021-06-05 21:03:32,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:32,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:32,644 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 29 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:03:32,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:32,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987402118] [2021-06-05 21:03:32,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987402118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:32,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756061294] [2021-06-05 21:03:32,645 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:32,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 21:03:32,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:03:32,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:03:32,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:03:32,723 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:03:32,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756061294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:32,723 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:03:32,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 21:03:32,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289322471] [2021-06-05 21:03:32,724 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:03:32,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:32,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:03:32,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:03:32,724 INFO L87 Difference]: Start difference. First operand 2023 states and 4937 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:32,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:32,877 INFO L93 Difference]: Finished difference Result 2392 states and 5647 transitions. [2021-06-05 21:03:32,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:03:32,877 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 21:03:32,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:32,879 INFO L225 Difference]: With dead ends: 2392 [2021-06-05 21:03:32,879 INFO L226 Difference]: Without dead ends: 2380 [2021-06-05 21:03:32,879 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 76.1ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:03:32,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2380 states. [2021-06-05 21:03:32,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2380 to 2025. [2021-06-05 21:03:32,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2025 states, 2024 states have (on average 2.441205533596838) internal successors, (4941), 2024 states have internal predecessors, (4941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:32,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2025 states to 2025 states and 4941 transitions. [2021-06-05 21:03:32,897 INFO L78 Accepts]: Start accepts. Automaton has 2025 states and 4941 transitions. Word has length 35 [2021-06-05 21:03:32,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:32,897 INFO L482 AbstractCegarLoop]: Abstraction has 2025 states and 4941 transitions. [2021-06-05 21:03:32,897 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:32,897 INFO L276 IsEmpty]: Start isEmpty. Operand 2025 states and 4941 transitions. [2021-06-05 21:03:32,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 21:03:32,898 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:32,898 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:03:33,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:33,101 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:33,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:33,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1517068631, now seen corresponding path program 34 times [2021-06-05 21:03:33,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:33,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397975259] [2021-06-05 21:03:33,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:33,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:33,154 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:03:33,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:33,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397975259] [2021-06-05 21:03:33,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397975259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:33,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801479397] [2021-06-05 21:03:33,155 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:33,201 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:03:33,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:03:33,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:03:33,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:03:33,261 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:03:33,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801479397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:33,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:03:33,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 21:03:33,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000297530] [2021-06-05 21:03:33,262 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:03:33,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:33,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:03:33,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:03:33,263 INFO L87 Difference]: Start difference. First operand 2025 states and 4941 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:33,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:33,510 INFO L93 Difference]: Finished difference Result 3056 states and 7043 transitions. [2021-06-05 21:03:33,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:03:33,511 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 21:03:33,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:33,513 INFO L225 Difference]: With dead ends: 3056 [2021-06-05 21:03:33,513 INFO L226 Difference]: Without dead ends: 3002 [2021-06-05 21:03:33,514 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 130.3ms TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:03:33,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3002 states. [2021-06-05 21:03:33,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3002 to 2084. [2021-06-05 21:03:33,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2084 states, 2083 states have (on average 2.4459913586173787) internal successors, (5095), 2083 states have internal predecessors, (5095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:33,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2084 states to 2084 states and 5095 transitions. [2021-06-05 21:03:33,535 INFO L78 Accepts]: Start accepts. Automaton has 2084 states and 5095 transitions. Word has length 35 [2021-06-05 21:03:33,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:33,536 INFO L482 AbstractCegarLoop]: Abstraction has 2084 states and 5095 transitions. [2021-06-05 21:03:33,536 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:33,536 INFO L276 IsEmpty]: Start isEmpty. Operand 2084 states and 5095 transitions. [2021-06-05 21:03:33,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 21:03:33,537 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:33,537 INFO L554 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:03:33,737 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:33,738 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:33,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:33,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1245339556, now seen corresponding path program 35 times [2021-06-05 21:03:33,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:33,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267885535] [2021-06-05 21:03:33,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:33,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:33,782 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:03:33,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:33,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267885535] [2021-06-05 21:03:33,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267885535] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:33,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630207151] [2021-06-05 21:03:33,783 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:33,806 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 21:03:33,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:03:33,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:03:33,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:03:33,864 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 16 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:03:33,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630207151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:33,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:03:33,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 10 [2021-06-05 21:03:33,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285391271] [2021-06-05 21:03:33,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:03:33,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:33,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:03:33,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:03:33,865 INFO L87 Difference]: Start difference. First operand 2084 states and 5095 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:33,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:33,985 INFO L93 Difference]: Finished difference Result 2889 states and 6691 transitions. [2021-06-05 21:03:33,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:03:33,985 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 21:03:33,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:33,987 INFO L225 Difference]: With dead ends: 2889 [2021-06-05 21:03:33,987 INFO L226 Difference]: Without dead ends: 2865 [2021-06-05 21:03:33,988 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 61.4ms TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:03:33,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2865 states. [2021-06-05 21:03:34,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2865 to 2164. [2021-06-05 21:03:34,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2164 states, 2163 states have (on average 2.4678687008784097) internal successors, (5338), 2163 states have internal predecessors, (5338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:34,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2164 states to 2164 states and 5338 transitions. [2021-06-05 21:03:34,008 INFO L78 Accepts]: Start accepts. Automaton has 2164 states and 5338 transitions. Word has length 35 [2021-06-05 21:03:34,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:34,008 INFO L482 AbstractCegarLoop]: Abstraction has 2164 states and 5338 transitions. [2021-06-05 21:03:34,008 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:34,008 INFO L276 IsEmpty]: Start isEmpty. Operand 2164 states and 5338 transitions. [2021-06-05 21:03:34,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 21:03:34,009 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:34,009 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:03:34,221 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2021-06-05 21:03:34,221 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:34,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:34,222 INFO L82 PathProgramCache]: Analyzing trace with hash 1671905165, now seen corresponding path program 36 times [2021-06-05 21:03:34,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:34,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454044194] [2021-06-05 21:03:34,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:34,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:34,275 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:03:34,275 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:34,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454044194] [2021-06-05 21:03:34,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454044194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:34,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327477367] [2021-06-05 21:03:34,275 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:34,300 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 21:03:34,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:03:34,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:03:34,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:03:34,350 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:03:34,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327477367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:34,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:03:34,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 21:03:34,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243780580] [2021-06-05 21:03:34,351 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:03:34,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:34,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:03:34,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:03:34,351 INFO L87 Difference]: Start difference. First operand 2164 states and 5338 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:34,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:34,723 INFO L93 Difference]: Finished difference Result 3794 states and 8733 transitions. [2021-06-05 21:03:34,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 21:03:34,723 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 21:03:34,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:34,726 INFO L225 Difference]: With dead ends: 3794 [2021-06-05 21:03:34,726 INFO L226 Difference]: Without dead ends: 3680 [2021-06-05 21:03:34,727 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 217.4ms TimeCoverageRelationStatistics Valid=159, Invalid=771, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:03:34,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3680 states. [2021-06-05 21:03:34,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3680 to 2276. [2021-06-05 21:03:34,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2276 states, 2275 states have (on average 2.474285714285714) internal successors, (5629), 2275 states have internal predecessors, (5629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:34,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2276 states to 2276 states and 5629 transitions. [2021-06-05 21:03:34,750 INFO L78 Accepts]: Start accepts. Automaton has 2276 states and 5629 transitions. Word has length 35 [2021-06-05 21:03:34,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:34,750 INFO L482 AbstractCegarLoop]: Abstraction has 2276 states and 5629 transitions. [2021-06-05 21:03:34,750 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:34,750 INFO L276 IsEmpty]: Start isEmpty. Operand 2276 states and 5629 transitions. [2021-06-05 21:03:34,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 21:03:34,752 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:34,752 INFO L554 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:03:34,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:34,953 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:34,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:34,953 INFO L82 PathProgramCache]: Analyzing trace with hash 2058507842, now seen corresponding path program 37 times [2021-06-05 21:03:34,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:34,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559531345] [2021-06-05 21:03:34,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:34,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:35,008 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 16 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:03:35,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:35,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559531345] [2021-06-05 21:03:35,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559531345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:35,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824857275] [2021-06-05 21:03:35,008 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:35,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:35,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:03:35,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:03:35,086 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 16 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:03:35,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824857275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:35,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:03:35,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 21:03:35,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978948918] [2021-06-05 21:03:35,087 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:03:35,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:35,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:03:35,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:03:35,087 INFO L87 Difference]: Start difference. First operand 2276 states and 5629 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:35,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:35,195 INFO L93 Difference]: Finished difference Result 2985 states and 6922 transitions. [2021-06-05 21:03:35,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:03:35,195 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 21:03:35,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:35,198 INFO L225 Difference]: With dead ends: 2985 [2021-06-05 21:03:35,198 INFO L226 Difference]: Without dead ends: 2949 [2021-06-05 21:03:35,198 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 67.2ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:03:35,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2949 states. [2021-06-05 21:03:35,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2949 to 2276. [2021-06-05 21:03:35,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2276 states, 2275 states have (on average 2.4725274725274726) internal successors, (5625), 2275 states have internal predecessors, (5625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:35,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2276 states to 2276 states and 5625 transitions. [2021-06-05 21:03:35,219 INFO L78 Accepts]: Start accepts. Automaton has 2276 states and 5625 transitions. Word has length 35 [2021-06-05 21:03:35,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:35,219 INFO L482 AbstractCegarLoop]: Abstraction has 2276 states and 5625 transitions. [2021-06-05 21:03:35,219 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:35,219 INFO L276 IsEmpty]: Start isEmpty. Operand 2276 states and 5625 transitions. [2021-06-05 21:03:35,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 21:03:35,221 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:35,221 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:03:35,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:35,441 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:35,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:35,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1612213655, now seen corresponding path program 38 times [2021-06-05 21:03:35,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:35,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589469361] [2021-06-05 21:03:35,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:35,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:35,504 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:03:35,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:35,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589469361] [2021-06-05 21:03:35,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589469361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:35,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896006917] [2021-06-05 21:03:35,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:35,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:03:35,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:03:35,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:03:35,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:03:35,592 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:03:35,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896006917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:35,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:03:35,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 21:03:35,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847051650] [2021-06-05 21:03:35,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:03:35,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:35,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:03:35,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:03:35,593 INFO L87 Difference]: Start difference. First operand 2276 states and 5625 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:35,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:35,849 INFO L93 Difference]: Finished difference Result 3037 states and 7074 transitions. [2021-06-05 21:03:35,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:03:35,849 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 21:03:35,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:35,851 INFO L225 Difference]: With dead ends: 3037 [2021-06-05 21:03:35,851 INFO L226 Difference]: Without dead ends: 2881 [2021-06-05 21:03:35,852 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 147.4ms TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:03:35,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2881 states. [2021-06-05 21:03:35,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2881 to 2074. [2021-06-05 21:03:35,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2074 states, 2073 states have (on average 2.4582730342498795) internal successors, (5096), 2073 states have internal predecessors, (5096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:35,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2074 states to 2074 states and 5096 transitions. [2021-06-05 21:03:35,870 INFO L78 Accepts]: Start accepts. Automaton has 2074 states and 5096 transitions. Word has length 35 [2021-06-05 21:03:35,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:35,870 INFO L482 AbstractCegarLoop]: Abstraction has 2074 states and 5096 transitions. [2021-06-05 21:03:35,870 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:35,870 INFO L276 IsEmpty]: Start isEmpty. Operand 2074 states and 5096 transitions. [2021-06-05 21:03:35,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 21:03:35,872 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:35,872 INFO L554 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:03:36,073 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:36,073 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:36,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:36,074 INFO L82 PathProgramCache]: Analyzing trace with hash 1374152138, now seen corresponding path program 15 times [2021-06-05 21:03:36,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:36,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087834724] [2021-06-05 21:03:36,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:36,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:36,122 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 32 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:03:36,123 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:36,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087834724] [2021-06-05 21:03:36,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087834724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:36,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682904598] [2021-06-05 21:03:36,123 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:36,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 21:03:36,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:03:36,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:03:36,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:03:36,218 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 32 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:03:36,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682904598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:36,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:03:36,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 8 [2021-06-05 21:03:36,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297610019] [2021-06-05 21:03:36,220 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:03:36,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:36,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:03:36,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:03:36,221 INFO L87 Difference]: Start difference. First operand 2074 states and 5096 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:36,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:36,388 INFO L93 Difference]: Finished difference Result 2850 states and 6708 transitions. [2021-06-05 21:03:36,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:03:36,389 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 21:03:36,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:36,391 INFO L225 Difference]: With dead ends: 2850 [2021-06-05 21:03:36,391 INFO L226 Difference]: Without dead ends: 2832 [2021-06-05 21:03:36,391 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 67.6ms TimeCoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:03:36,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2832 states. [2021-06-05 21:03:36,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2832 to 2298. [2021-06-05 21:03:36,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2298 states, 2297 states have (on average 2.4902046147148456) internal successors, (5720), 2297 states have internal predecessors, (5720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:36,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2298 states to 2298 states and 5720 transitions. [2021-06-05 21:03:36,413 INFO L78 Accepts]: Start accepts. Automaton has 2298 states and 5720 transitions. Word has length 35 [2021-06-05 21:03:36,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:36,413 INFO L482 AbstractCegarLoop]: Abstraction has 2298 states and 5720 transitions. [2021-06-05 21:03:36,413 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:36,413 INFO L276 IsEmpty]: Start isEmpty. Operand 2298 states and 5720 transitions. [2021-06-05 21:03:36,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 21:03:36,415 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:36,415 INFO L554 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:03:36,615 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable193 [2021-06-05 21:03:36,616 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:36,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:36,616 INFO L82 PathProgramCache]: Analyzing trace with hash 752271728, now seen corresponding path program 16 times [2021-06-05 21:03:36,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:36,616 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852826416] [2021-06-05 21:03:36,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:36,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:36,669 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 32 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:03:36,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:36,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852826416] [2021-06-05 21:03:36,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852826416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:36,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605215725] [2021-06-05 21:03:36,669 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:36,699 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:03:36,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:03:36,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:03:36,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:03:36,763 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 33 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:03:36,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605215725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:36,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:03:36,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 9 [2021-06-05 21:03:36,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153812847] [2021-06-05 21:03:36,763 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:03:36,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:36,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:03:36,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:03:36,764 INFO L87 Difference]: Start difference. First operand 2298 states and 5720 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:36,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:36,965 INFO L93 Difference]: Finished difference Result 2847 states and 6724 transitions. [2021-06-05 21:03:36,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:03:36,966 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 21:03:36,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:36,969 INFO L225 Difference]: With dead ends: 2847 [2021-06-05 21:03:36,969 INFO L226 Difference]: Without dead ends: 2847 [2021-06-05 21:03:36,969 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 105.7ms TimeCoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:03:36,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2847 states. [2021-06-05 21:03:36,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2847 to 2179. [2021-06-05 21:03:36,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2179 states, 2178 states have (on average 2.4724517906336088) internal successors, (5385), 2178 states have internal predecessors, (5385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:37,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2179 states to 2179 states and 5385 transitions. [2021-06-05 21:03:37,003 INFO L78 Accepts]: Start accepts. Automaton has 2179 states and 5385 transitions. Word has length 35 [2021-06-05 21:03:37,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:37,003 INFO L482 AbstractCegarLoop]: Abstraction has 2179 states and 5385 transitions. [2021-06-05 21:03:37,003 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:37,004 INFO L276 IsEmpty]: Start isEmpty. Operand 2179 states and 5385 transitions. [2021-06-05 21:03:37,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 21:03:37,006 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:37,006 INFO L554 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:03:37,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,105 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:37,221 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:37,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:37,221 INFO L82 PathProgramCache]: Analyzing trace with hash -789180772, now seen corresponding path program 39 times [2021-06-05 21:03:37,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:37,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066990181] [2021-06-05 21:03:37,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:37,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:37,283 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 24 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:03:37,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:37,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066990181] [2021-06-05 21:03:37,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066990181] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:37,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639046177] [2021-06-05 21:03:37,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:37,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:03:37,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:03:37,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:03:37,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:03:37,371 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 24 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:03:37,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639046177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:37,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:03:37,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 21:03:37,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338479391] [2021-06-05 21:03:37,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:03:37,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:37,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:03:37,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:03:37,372 INFO L87 Difference]: Start difference. First operand 2179 states and 5385 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:37,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:37,529 INFO L93 Difference]: Finished difference Result 2663 states and 6272 transitions. [2021-06-05 21:03:37,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:03:37,529 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 21:03:37,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:37,531 INFO L225 Difference]: With dead ends: 2663 [2021-06-05 21:03:37,531 INFO L226 Difference]: Without dead ends: 2616 [2021-06-05 21:03:37,532 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 85.2ms TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:03:37,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2616 states. [2021-06-05 21:03:37,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2616 to 2188. [2021-06-05 21:03:37,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2188 states, 2187 states have (on average 2.4686785550983084) internal successors, (5399), 2187 states have internal predecessors, (5399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:37,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2188 states to 2188 states and 5399 transitions. [2021-06-05 21:03:37,552 INFO L78 Accepts]: Start accepts. Automaton has 2188 states and 5399 transitions. Word has length 35 [2021-06-05 21:03:37,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:37,552 INFO L482 AbstractCegarLoop]: Abstraction has 2188 states and 5399 transitions. [2021-06-05 21:03:37,552 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:37,552 INFO L276 IsEmpty]: Start isEmpty. Operand 2188 states and 5399 transitions. [2021-06-05 21:03:37,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 21:03:37,553 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:37,553 INFO L554 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:03:37,755 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:37,755 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:37,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:37,755 INFO L82 PathProgramCache]: Analyzing trace with hash 1018494725, now seen corresponding path program 40 times [2021-06-05 21:03:37,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:37,755 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534467103] [2021-06-05 21:03:37,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:37,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:37,798 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:03:37,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:37,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534467103] [2021-06-05 21:03:37,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534467103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:37,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946018596] [2021-06-05 21:03:37,798 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:37,822 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:03:37,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:03:37,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:03:37,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:03:38,001 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 22 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:03:38,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946018596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:38,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:03:38,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 11] total 16 [2021-06-05 21:03:38,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618559833] [2021-06-05 21:03:38,001 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:03:38,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:38,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:03:38,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:03:38,002 INFO L87 Difference]: Start difference. First operand 2188 states and 5399 transitions. Second operand has 17 states, 17 states have (on average 4.411764705882353) internal successors, (75), 16 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:38,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:38,708 INFO L93 Difference]: Finished difference Result 3588 states and 8244 transitions. [2021-06-05 21:03:38,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 21:03:38,708 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.411764705882353) internal successors, (75), 16 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 21:03:38,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:38,712 INFO L225 Difference]: With dead ends: 3588 [2021-06-05 21:03:38,712 INFO L226 Difference]: Without dead ends: 3550 [2021-06-05 21:03:38,712 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 415.1ms TimeCoverageRelationStatistics Valid=345, Invalid=1215, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 21:03:38,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3550 states. [2021-06-05 21:03:38,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3550 to 2578. [2021-06-05 21:03:38,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2578 states, 2577 states have (on average 2.43500194024059) internal successors, (6275), 2577 states have internal predecessors, (6275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:38,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2578 states to 2578 states and 6275 transitions. [2021-06-05 21:03:38,741 INFO L78 Accepts]: Start accepts. Automaton has 2578 states and 6275 transitions. Word has length 38 [2021-06-05 21:03:38,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:38,741 INFO L482 AbstractCegarLoop]: Abstraction has 2578 states and 6275 transitions. [2021-06-05 21:03:38,741 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.411764705882353) internal successors, (75), 16 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:38,741 INFO L276 IsEmpty]: Start isEmpty. Operand 2578 states and 6275 transitions. [2021-06-05 21:03:38,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 21:03:38,743 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:38,743 INFO L554 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:03:38,945 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:38,945 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:38,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:38,946 INFO L82 PathProgramCache]: Analyzing trace with hash 988310311, now seen corresponding path program 41 times [2021-06-05 21:03:38,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:38,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984771065] [2021-06-05 21:03:38,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:38,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:39,005 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 21:03:39,005 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:39,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984771065] [2021-06-05 21:03:39,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984771065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:39,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614079755] [2021-06-05 21:03:39,005 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:39,039 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 21:03:39,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:03:39,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:03:39,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:03:39,099 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 21:03:39,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614079755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:39,100 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:03:39,100 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-05 21:03:39,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862027946] [2021-06-05 21:03:39,100 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:03:39,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:39,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:03:39,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:03:39,100 INFO L87 Difference]: Start difference. First operand 2578 states and 6275 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:39,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:39,260 INFO L93 Difference]: Finished difference Result 3224 states and 7683 transitions. [2021-06-05 21:03:39,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:03:39,260 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 21:03:39,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:39,264 INFO L225 Difference]: With dead ends: 3224 [2021-06-05 21:03:39,264 INFO L226 Difference]: Without dead ends: 3189 [2021-06-05 21:03:39,265 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 47.7ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:03:39,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3189 states. [2021-06-05 21:03:39,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3189 to 2741. [2021-06-05 21:03:39,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2741 states, 2740 states have (on average 2.4572992700729928) internal successors, (6733), 2740 states have internal predecessors, (6733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:39,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2741 states to 2741 states and 6733 transitions. [2021-06-05 21:03:39,305 INFO L78 Accepts]: Start accepts. Automaton has 2741 states and 6733 transitions. Word has length 38 [2021-06-05 21:03:39,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:39,305 INFO L482 AbstractCegarLoop]: Abstraction has 2741 states and 6733 transitions. [2021-06-05 21:03:39,305 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) [2021-06-05 21:03:39,305 INFO L276 IsEmpty]: Start isEmpty. Operand 2741 states and 6733 transitions. [2021-06-05 21:03:39,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 21:03:39,308 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:39,309 INFO L554 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:03:39,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2021-06-05 21:03:39,524 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:39,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:39,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1650028221, now seen corresponding path program 42 times [2021-06-05 21:03:39,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:39,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564137846] [2021-06-05 21:03:39,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:39,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:39,568 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 21:03:39,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:39,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564137846] [2021-06-05 21:03:39,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564137846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:39,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476286934] [2021-06-05 21:03:39,568 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:39,603 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 21:03:39,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:03:39,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:03:39,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:03:39,736 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 10 proven. 41 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:03:39,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476286934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:39,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:03:39,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2021-06-05 21:03:39,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197642123] [2021-06-05 21:03:39,737 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:03:39,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:39,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:03:39,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:03:39,737 INFO L87 Difference]: Start difference. First operand 2741 states and 6733 transitions. Second operand has 13 states, 13 states have (on average 5.538461538461538) internal successors, (72), 12 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:40,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:40,258 INFO L93 Difference]: Finished difference Result 4464 states and 10129 transitions. [2021-06-05 21:03:40,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 21:03:40,258 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.538461538461538) internal successors, (72), 12 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 21:03:40,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:40,262 INFO L225 Difference]: With dead ends: 4464 [2021-06-05 21:03:40,262 INFO L226 Difference]: Without dead ends: 4401 [2021-06-05 21:03:40,262 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 244.9ms TimeCoverageRelationStatistics Valid=158, Invalid=598, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:03:40,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4401 states. [2021-06-05 21:03:40,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4401 to 2892. [2021-06-05 21:03:40,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2892 states, 2891 states have (on average 2.4787270840539604) internal successors, (7166), 2891 states have internal predecessors, (7166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:40,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2892 states to 2892 states and 7166 transitions. [2021-06-05 21:03:40,291 INFO L78 Accepts]: Start accepts. Automaton has 2892 states and 7166 transitions. Word has length 38 [2021-06-05 21:03:40,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:40,291 INFO L482 AbstractCegarLoop]: Abstraction has 2892 states and 7166 transitions. [2021-06-05 21:03:40,291 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.538461538461538) internal successors, (72), 12 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:40,291 INFO L276 IsEmpty]: Start isEmpty. Operand 2892 states and 7166 transitions. [2021-06-05 21:03:40,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 21:03:40,293 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:40,293 INFO L554 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:03:40,493 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:40,493 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:40,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:40,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1035175619, now seen corresponding path program 43 times [2021-06-05 21:03:40,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:40,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000326456] [2021-06-05 21:03:40,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:40,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:40,530 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:03:40,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:40,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000326456] [2021-06-05 21:03:40,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000326456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:40,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093770271] [2021-06-05 21:03:40,531 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:40,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:40,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:03:40,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:03:40,602 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:03:40,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093770271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:40,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:03:40,603 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-05 21:03:40,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210140230] [2021-06-05 21:03:40,603 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:03:40,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:40,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:03:40,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:03:40,603 INFO L87 Difference]: Start difference. First operand 2892 states and 7166 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:40,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:40,735 INFO L93 Difference]: Finished difference Result 3617 states and 8704 transitions. [2021-06-05 21:03:40,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:03:40,735 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 21:03:40,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:40,738 INFO L225 Difference]: With dead ends: 3617 [2021-06-05 21:03:40,738 INFO L226 Difference]: Without dead ends: 3592 [2021-06-05 21:03:40,739 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.2ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:03:40,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3592 states. [2021-06-05 21:03:40,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3592 to 3175. [2021-06-05 21:03:40,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3175 states, 3174 states have (on average 2.4697542533081287) internal successors, (7839), 3174 states have internal predecessors, (7839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:40,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3175 states to 3175 states and 7839 transitions. [2021-06-05 21:03:40,766 INFO L78 Accepts]: Start accepts. Automaton has 3175 states and 7839 transitions. Word has length 38 [2021-06-05 21:03:40,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:40,766 INFO L482 AbstractCegarLoop]: Abstraction has 3175 states and 7839 transitions. [2021-06-05 21:03:40,766 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:40,766 INFO L276 IsEmpty]: Start isEmpty. Operand 3175 states and 7839 transitions. [2021-06-05 21:03:40,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 21:03:40,768 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:40,768 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:03:40,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable207 [2021-06-05 21:03:40,969 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:40,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:40,969 INFO L82 PathProgramCache]: Analyzing trace with hash -1350282616, now seen corresponding path program 17 times [2021-06-05 21:03:40,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:40,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334323320] [2021-06-05 21:03:40,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:40,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:41,062 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:03:41,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:41,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334323320] [2021-06-05 21:03:41,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334323320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:41,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127031221] [2021-06-05 21:03:41,062 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:41,095 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 21:03:41,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:03:41,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:03:41,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:03:41,154 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:03:41,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127031221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:41,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:03:41,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:03:41,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922308393] [2021-06-05 21:03:41,154 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:03:41,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:41,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:03:41,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:03:41,155 INFO L87 Difference]: Start difference. First operand 3175 states and 7839 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:41,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:41,575 INFO L93 Difference]: Finished difference Result 4225 states and 9893 transitions. [2021-06-05 21:03:41,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:03:41,576 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 21:03:41,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:41,579 INFO L225 Difference]: With dead ends: 4225 [2021-06-05 21:03:41,579 INFO L226 Difference]: Without dead ends: 4189 [2021-06-05 21:03:41,579 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 220.7ms TimeCoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:03:41,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4189 states. [2021-06-05 21:03:41,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4189 to 3084. [2021-06-05 21:03:41,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3084 states, 3083 states have (on average 2.480051897502433) internal successors, (7646), 3083 states have internal predecessors, (7646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:41,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3084 states to 3084 states and 7646 transitions. [2021-06-05 21:03:41,607 INFO L78 Accepts]: Start accepts. Automaton has 3084 states and 7646 transitions. Word has length 41 [2021-06-05 21:03:41,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:41,607 INFO L482 AbstractCegarLoop]: Abstraction has 3084 states and 7646 transitions. [2021-06-05 21:03:41,607 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:41,607 INFO L276 IsEmpty]: Start isEmpty. Operand 3084 states and 7646 transitions. [2021-06-05 21:03:41,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 21:03:41,610 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:41,610 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:03:41,810 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:41,810 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:41,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:41,811 INFO L82 PathProgramCache]: Analyzing trace with hash 1492128392, now seen corresponding path program 44 times [2021-06-05 21:03:41,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:41,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877381629] [2021-06-05 21:03:41,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:41,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:41,922 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:03:41,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:41,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877381629] [2021-06-05 21:03:41,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877381629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:41,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219069027] [2021-06-05 21:03:41,923 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 [2021-06-05 21:03:41,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:03:41,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:03:41,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:03:41,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:03:42,135 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:03:42,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219069027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:42,136 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:03:42,136 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 21:03:42,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994239344] [2021-06-05 21:03:42,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:03:42,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:42,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:03:42,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:03:42,136 INFO L87 Difference]: Start difference. First operand 3084 states and 7646 transitions. Second operand has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:42,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:42,645 INFO L93 Difference]: Finished difference Result 3304 states and 7993 transitions. [2021-06-05 21:03:42,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:03:42,645 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 21:03:42,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:42,649 INFO L225 Difference]: With dead ends: 3304 [2021-06-05 21:03:42,649 INFO L226 Difference]: Without dead ends: 3236 [2021-06-05 21:03:42,649 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 178.4ms TimeCoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:03:42,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3236 states. [2021-06-05 21:03:42,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3236 to 3084. [2021-06-05 21:03:42,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3084 states, 3083 states have (on average 2.474862147259163) internal successors, (7630), 3083 states have internal predecessors, (7630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:42,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3084 states to 3084 states and 7630 transitions. [2021-06-05 21:03:42,676 INFO L78 Accepts]: Start accepts. Automaton has 3084 states and 7630 transitions. Word has length 41 [2021-06-05 21:03:42,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:42,676 INFO L482 AbstractCegarLoop]: Abstraction has 3084 states and 7630 transitions. [2021-06-05 21:03:42,676 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:42,676 INFO L276 IsEmpty]: Start isEmpty. Operand 3084 states and 7630 transitions. [2021-06-05 21:03:42,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 21:03:42,678 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:42,678 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:03:42,878 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable209 [2021-06-05 21:03:42,879 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:42,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:42,879 INFO L82 PathProgramCache]: Analyzing trace with hash -1073103992, now seen corresponding path program 45 times [2021-06-05 21:03:42,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:42,879 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261546166] [2021-06-05 21:03:42,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:42,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:42,997 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:03:42,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:42,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261546166] [2021-06-05 21:03:42,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261546166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:42,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888277289] [2021-06-05 21:03:42,997 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 [2021-06-05 21:03:43,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 21:03:43,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:03:43,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:03:43,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:03:43,099 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:03:43,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888277289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:43,100 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:03:43,100 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 21:03:43,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277523927] [2021-06-05 21:03:43,100 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:03:43,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:43,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:03:43,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:03:43,100 INFO L87 Difference]: Start difference. First operand 3084 states and 7630 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:43,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:43,326 INFO L93 Difference]: Finished difference Result 3450 states and 8325 transitions. [2021-06-05 21:03:43,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:03:43,327 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 21:03:43,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:43,330 INFO L225 Difference]: With dead ends: 3450 [2021-06-05 21:03:43,330 INFO L226 Difference]: Without dead ends: 3450 [2021-06-05 21:03:43,331 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 108.8ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:03:43,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3450 states. [2021-06-05 21:03:43,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3450 to 3096. [2021-06-05 21:03:43,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3096 states, 3095 states have (on average 2.477221324717286) internal successors, (7667), 3095 states have internal predecessors, (7667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:43,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3096 states to 3096 states and 7667 transitions. [2021-06-05 21:03:43,373 INFO L78 Accepts]: Start accepts. Automaton has 3096 states and 7667 transitions. Word has length 41 [2021-06-05 21:03:43,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:43,373 INFO L482 AbstractCegarLoop]: Abstraction has 3096 states and 7667 transitions. [2021-06-05 21:03:43,373 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:43,373 INFO L276 IsEmpty]: Start isEmpty. Operand 3096 states and 7667 transitions. [2021-06-05 21:03:43,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 21:03:43,376 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:43,376 INFO L554 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:03:43,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2021-06-05 21:03:43,592 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:43,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:43,593 INFO L82 PathProgramCache]: Analyzing trace with hash 665060437, now seen corresponding path program 18 times [2021-06-05 21:03:43,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:43,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413210694] [2021-06-05 21:03:43,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:43,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:43,708 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 41 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:03:43,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:43,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413210694] [2021-06-05 21:03:43,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413210694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:43,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000127786] [2021-06-05 21:03:43,708 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:43,741 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 21:03:43,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:03:43,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 21:03:43,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:03:43,833 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 41 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:03:43,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000127786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:43,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:03:43,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 14 [2021-06-05 21:03:43,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468297384] [2021-06-05 21:03:43,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:03:43,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:43,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:03:43,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:03:43,834 INFO L87 Difference]: Start difference. First operand 3096 states and 7667 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:44,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:44,111 INFO L93 Difference]: Finished difference Result 4321 states and 10236 transitions. [2021-06-05 21:03:44,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:03:44,111 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 21:03:44,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:44,117 INFO L225 Difference]: With dead ends: 4321 [2021-06-05 21:03:44,117 INFO L226 Difference]: Without dead ends: 4263 [2021-06-05 21:03:44,117 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 167.7ms TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:03:44,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4263 states. [2021-06-05 21:03:44,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4263 to 3240. [2021-06-05 21:03:44,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3240 states, 3239 states have (on average 2.4902747761654833) internal successors, (8066), 3239 states have internal predecessors, (8066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:44,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3240 states to 3240 states and 8066 transitions. [2021-06-05 21:03:44,167 INFO L78 Accepts]: Start accepts. Automaton has 3240 states and 8066 transitions. Word has length 41 [2021-06-05 21:03:44,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:44,167 INFO L482 AbstractCegarLoop]: Abstraction has 3240 states and 8066 transitions. [2021-06-05 21:03:44,168 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:44,168 INFO L276 IsEmpty]: Start isEmpty. Operand 3240 states and 8066 transitions. [2021-06-05 21:03:44,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 21:03:44,171 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:44,171 INFO L554 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:03:44,393 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2021-06-05 21:03:44,393 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:44,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:44,393 INFO L82 PathProgramCache]: Analyzing trace with hash 9364347, now seen corresponding path program 19 times [2021-06-05 21:03:44,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:44,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682366290] [2021-06-05 21:03:44,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:44,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:44,487 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 42 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:03:44,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:44,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682366290] [2021-06-05 21:03:44,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682366290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:44,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077622421] [2021-06-05 21:03:44,488 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:44,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:44,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 21:03:44,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:03:44,676 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 43 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:03:44,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077622421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:44,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:03:44,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 9 [2021-06-05 21:03:44,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071956275] [2021-06-05 21:03:44,677 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:03:44,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:44,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:03:44,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:03:44,677 INFO L87 Difference]: Start difference. First operand 3240 states and 8066 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:44,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:44,889 INFO L93 Difference]: Finished difference Result 4797 states and 11528 transitions. [2021-06-05 21:03:44,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:03:44,890 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 21:03:44,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:44,895 INFO L225 Difference]: With dead ends: 4797 [2021-06-05 21:03:44,895 INFO L226 Difference]: Without dead ends: 4797 [2021-06-05 21:03:44,895 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 91.4ms TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:03:44,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4797 states. [2021-06-05 21:03:44,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4797 to 3486. [2021-06-05 21:03:44,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3486 states, 3485 states have (on average 2.5265423242467717) internal successors, (8805), 3485 states have internal predecessors, (8805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:45,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3486 states to 3486 states and 8805 transitions. [2021-06-05 21:03:45,024 INFO L78 Accepts]: Start accepts. Automaton has 3486 states and 8805 transitions. Word has length 41 [2021-06-05 21:03:45,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:45,024 INFO L482 AbstractCegarLoop]: Abstraction has 3486 states and 8805 transitions. [2021-06-05 21:03:45,024 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:45,024 INFO L276 IsEmpty]: Start isEmpty. Operand 3486 states and 8805 transitions. [2021-06-05 21:03:45,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 21:03:45,029 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:45,029 INFO L554 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:03:45,250 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:45,251 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:45,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:45,251 INFO L82 PathProgramCache]: Analyzing trace with hash -524501029, now seen corresponding path program 46 times [2021-06-05 21:03:45,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:45,251 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027864841] [2021-06-05 21:03:45,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:45,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:45,326 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 33 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:03:45,326 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:45,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027864841] [2021-06-05 21:03:45,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027864841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:45,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895833503] [2021-06-05 21:03:45,327 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:45,396 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:03:45,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:03:45,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 21:03:45,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:03:45,481 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 33 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:03:45,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895833503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:45,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:03:45,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 21:03:45,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017001219] [2021-06-05 21:03:45,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:03:45,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:45,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:03:45,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:03:45,482 INFO L87 Difference]: Start difference. First operand 3486 states and 8805 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:45,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:45,619 INFO L93 Difference]: Finished difference Result 3733 states and 9242 transitions. [2021-06-05 21:03:45,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 21:03:45,620 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 21:03:45,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:45,624 INFO L225 Difference]: With dead ends: 3733 [2021-06-05 21:03:45,624 INFO L226 Difference]: Without dead ends: 3727 [2021-06-05 21:03:45,624 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 70.6ms TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:03:45,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3727 states. [2021-06-05 21:03:45,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3727 to 3447. [2021-06-05 21:03:45,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3447 states, 3446 states have (on average 2.5194428322692977) internal successors, (8682), 3446 states have internal predecessors, (8682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:45,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3447 states to 3447 states and 8682 transitions. [2021-06-05 21:03:45,674 INFO L78 Accepts]: Start accepts. Automaton has 3447 states and 8682 transitions. Word has length 41 [2021-06-05 21:03:45,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:45,674 INFO L482 AbstractCegarLoop]: Abstraction has 3447 states and 8682 transitions. [2021-06-05 21:03:45,674 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:45,674 INFO L276 IsEmpty]: Start isEmpty. Operand 3447 states and 8682 transitions. [2021-06-05 21:03:45,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 21:03:45,678 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:45,678 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:03:45,899 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable219 [2021-06-05 21:03:45,900 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:45,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:45,900 INFO L82 PathProgramCache]: Analyzing trace with hash -1583917210, now seen corresponding path program 20 times [2021-06-05 21:03:45,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:45,900 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934239751] [2021-06-05 21:03:45,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:45,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:46,020 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 6 proven. 57 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:03:46,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:46,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934239751] [2021-06-05 21:03:46,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934239751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:46,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524605416] [2021-06-05 21:03:46,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:46,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:03:46,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:03:46,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:03:46,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:03:46,132 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 58 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:03:46,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524605416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:46,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:03:46,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 21:03:46,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461077222] [2021-06-05 21:03:46,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:03:46,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:46,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:03:46,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:03:46,134 INFO L87 Difference]: Start difference. First operand 3447 states and 8682 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:46,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:46,405 INFO L93 Difference]: Finished difference Result 4309 states and 10396 transitions. [2021-06-05 21:03:46,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:03:46,406 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 21:03:46,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:46,410 INFO L225 Difference]: With dead ends: 4309 [2021-06-05 21:03:46,411 INFO L226 Difference]: Without dead ends: 4278 [2021-06-05 21:03:46,411 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 130.5ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:03:46,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4278 states. [2021-06-05 21:03:46,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4278 to 3497. [2021-06-05 21:03:46,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3497 states, 3496 states have (on average 2.5160183066361554) internal successors, (8796), 3496 states have internal predecessors, (8796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:46,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3497 states to 3497 states and 8796 transitions. [2021-06-05 21:03:46,462 INFO L78 Accepts]: Start accepts. Automaton has 3497 states and 8796 transitions. Word has length 41 [2021-06-05 21:03:46,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:46,463 INFO L482 AbstractCegarLoop]: Abstraction has 3497 states and 8796 transitions. [2021-06-05 21:03:46,463 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:46,463 INFO L276 IsEmpty]: Start isEmpty. Operand 3497 states and 8796 transitions. [2021-06-05 21:03:46,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 21:03:46,467 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:46,467 INFO L554 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:03:46,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable222,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:46,689 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:46,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:46,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1157353229, now seen corresponding path program 47 times [2021-06-05 21:03:46,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:46,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617199949] [2021-06-05 21:03:46,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:46,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:46,733 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 31 proven. 32 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:03:46,733 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:46,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617199949] [2021-06-05 21:03:46,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617199949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:46,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955682681] [2021-06-05 21:03:46,733 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:46,766 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 21:03:46,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:03:46,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 21:03:46,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:03:46,864 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 35 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:03:46,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955682681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:46,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:03:46,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 11 [2021-06-05 21:03:46,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299410506] [2021-06-05 21:03:46,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:03:46,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:46,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:03:46,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:03:46,866 INFO L87 Difference]: Start difference. First operand 3497 states and 8796 transitions. Second operand has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 11 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:47,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:47,114 INFO L93 Difference]: Finished difference Result 4421 states and 10653 transitions. [2021-06-05 21:03:47,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:03:47,115 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 11 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 21:03:47,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:47,120 INFO L225 Difference]: With dead ends: 4421 [2021-06-05 21:03:47,120 INFO L226 Difference]: Without dead ends: 4412 [2021-06-05 21:03:47,120 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 71.4ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:03:47,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4412 states. [2021-06-05 21:03:47,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4412 to 3587. [2021-06-05 21:03:47,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3587 states, 3586 states have (on average 2.5312325711098715) internal successors, (9077), 3586 states have internal predecessors, (9077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:47,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3587 states to 3587 states and 9077 transitions. [2021-06-05 21:03:47,290 INFO L78 Accepts]: Start accepts. Automaton has 3587 states and 9077 transitions. Word has length 41 [2021-06-05 21:03:47,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:47,290 INFO L482 AbstractCegarLoop]: Abstraction has 3587 states and 9077 transitions. [2021-06-05 21:03:47,290 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 11 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:47,290 INFO L276 IsEmpty]: Start isEmpty. Operand 3587 states and 9077 transitions. [2021-06-05 21:03:47,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 21:03:47,294 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:47,295 INFO L554 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:03:47,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2021-06-05 21:03:47,509 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:47,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:47,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1364415795, now seen corresponding path program 48 times [2021-06-05 21:03:47,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:47,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443685172] [2021-06-05 21:03:47,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:47,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:47,563 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 28 proven. 35 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:03:47,563 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:47,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443685172] [2021-06-05 21:03:47,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443685172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:47,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148749555] [2021-06-05 21:03:47,564 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:47,597 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 21:03:47,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:03:47,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 21:03:47,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:03:47,663 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 28 proven. 35 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:03:47,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148749555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:47,663 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:03:47,663 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 21:03:47,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771706442] [2021-06-05 21:03:47,664 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:03:47,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:47,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:03:47,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:03:47,664 INFO L87 Difference]: Start difference. First operand 3587 states and 9077 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:47,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:47,808 INFO L93 Difference]: Finished difference Result 4253 states and 10263 transitions. [2021-06-05 21:03:47,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:03:47,809 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 21:03:47,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:47,813 INFO L225 Difference]: With dead ends: 4253 [2021-06-05 21:03:47,813 INFO L226 Difference]: Without dead ends: 4235 [2021-06-05 21:03:47,813 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 67.2ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:03:47,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4235 states. [2021-06-05 21:03:47,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4235 to 3587. [2021-06-05 21:03:47,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3587 states, 3586 states have (on average 2.5284439486893473) internal successors, (9067), 3586 states have internal predecessors, (9067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:47,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3587 states to 3587 states and 9067 transitions. [2021-06-05 21:03:47,864 INFO L78 Accepts]: Start accepts. Automaton has 3587 states and 9067 transitions. Word has length 41 [2021-06-05 21:03:47,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:47,864 INFO L482 AbstractCegarLoop]: Abstraction has 3587 states and 9067 transitions. [2021-06-05 21:03:47,864 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:47,865 INFO L276 IsEmpty]: Start isEmpty. Operand 3587 states and 9067 transitions. [2021-06-05 21:03:47,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 21:03:47,869 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:47,869 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:03:48,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2021-06-05 21:03:48,085 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:48,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:48,085 INFO L82 PathProgramCache]: Analyzing trace with hash -83584218, now seen corresponding path program 49 times [2021-06-05 21:03:48,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:48,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050410025] [2021-06-05 21:03:48,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:48,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:48,208 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 14 proven. 49 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:03:48,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:48,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050410025] [2021-06-05 21:03:48,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050410025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:48,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151145962] [2021-06-05 21:03:48,210 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:48,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:48,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:03:48,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:03:48,404 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 54 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:03:48,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151145962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:48,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:03:48,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 21:03:48,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798028723] [2021-06-05 21:03:48,418 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:03:48,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:48,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:03:48,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:03:48,420 INFO L87 Difference]: Start difference. First operand 3587 states and 9067 transitions. Second operand has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:49,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:49,022 INFO L93 Difference]: Finished difference Result 4054 states and 9921 transitions. [2021-06-05 21:03:49,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:03:49,023 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 21:03:49,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:49,028 INFO L225 Difference]: With dead ends: 4054 [2021-06-05 21:03:49,029 INFO L226 Difference]: Without dead ends: 4016 [2021-06-05 21:03:49,030 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 154.5ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:03:49,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4016 states. [2021-06-05 21:03:49,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4016 to 3593. [2021-06-05 21:03:49,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3593 states, 3592 states have (on average 2.525055679287305) internal successors, (9070), 3592 states have internal predecessors, (9070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:49,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3593 states to 3593 states and 9070 transitions. [2021-06-05 21:03:49,085 INFO L78 Accepts]: Start accepts. Automaton has 3593 states and 9070 transitions. Word has length 41 [2021-06-05 21:03:49,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:49,085 INFO L482 AbstractCegarLoop]: Abstraction has 3593 states and 9070 transitions. [2021-06-05 21:03:49,085 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:49,085 INFO L276 IsEmpty]: Start isEmpty. Operand 3593 states and 9070 transitions. [2021-06-05 21:03:49,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 21:03:49,089 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:49,089 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:03:49,311 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2021-06-05 21:03:49,311 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:49,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:49,311 INFO L82 PathProgramCache]: Analyzing trace with hash -697120398, now seen corresponding path program 50 times [2021-06-05 21:03:49,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:49,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056486758] [2021-06-05 21:03:49,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:49,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:49,441 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:03:49,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:49,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056486758] [2021-06-05 21:03:49,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056486758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:49,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120506717] [2021-06-05 21:03:49,442 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:49,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:03:49,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:03:49,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:03:49,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:03:49,552 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:03:49,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120506717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:49,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:03:49,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 21:03:49,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829571392] [2021-06-05 21:03:49,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:03:49,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:49,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:03:49,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:03:49,554 INFO L87 Difference]: Start difference. First operand 3593 states and 9070 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:49,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:49,844 INFO L93 Difference]: Finished difference Result 4259 states and 10390 transitions. [2021-06-05 21:03:49,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:03:49,844 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 21:03:49,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:49,849 INFO L225 Difference]: With dead ends: 4259 [2021-06-05 21:03:49,850 INFO L226 Difference]: Without dead ends: 4247 [2021-06-05 21:03:49,850 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 119.9ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:03:49,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4247 states. [2021-06-05 21:03:49,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4247 to 3595. [2021-06-05 21:03:49,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3595 states, 3594 states have (on average 2.5242070116861437) internal successors, (9072), 3594 states have internal predecessors, (9072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:49,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3595 states to 3595 states and 9072 transitions. [2021-06-05 21:03:49,902 INFO L78 Accepts]: Start accepts. Automaton has 3595 states and 9072 transitions. Word has length 41 [2021-06-05 21:03:49,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:49,902 INFO L482 AbstractCegarLoop]: Abstraction has 3595 states and 9072 transitions. [2021-06-05 21:03:49,902 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:49,902 INFO L276 IsEmpty]: Start isEmpty. Operand 3595 states and 9072 transitions. [2021-06-05 21:03:49,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 21:03:49,906 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:49,906 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:03:50,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:50,120 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:50,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:50,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1444796936, now seen corresponding path program 51 times [2021-06-05 21:03:50,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:50,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972461308] [2021-06-05 21:03:50,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:50,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:50,189 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:03:50,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:50,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972461308] [2021-06-05 21:03:50,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972461308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:50,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84732903] [2021-06-05 21:03:50,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:50,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 21:03:50,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:03:50,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:03:50,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:03:50,327 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:03:50,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84732903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:50,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:03:50,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 21:03:50,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018240622] [2021-06-05 21:03:50,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:03:50,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:50,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:03:50,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:03:50,329 INFO L87 Difference]: Start difference. First operand 3595 states and 9072 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:50,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:50,696 INFO L93 Difference]: Finished difference Result 4613 states and 11146 transitions. [2021-06-05 21:03:50,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:03:50,697 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 21:03:50,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:50,702 INFO L225 Difference]: With dead ends: 4613 [2021-06-05 21:03:50,703 INFO L226 Difference]: Without dead ends: 4601 [2021-06-05 21:03:50,703 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 125.4ms TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:03:50,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4601 states. [2021-06-05 21:03:50,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4601 to 3620. [2021-06-05 21:03:50,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3620 states, 3619 states have (on average 2.5230726720088423) internal successors, (9131), 3619 states have internal predecessors, (9131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:50,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3620 states to 3620 states and 9131 transitions. [2021-06-05 21:03:50,758 INFO L78 Accepts]: Start accepts. Automaton has 3620 states and 9131 transitions. Word has length 41 [2021-06-05 21:03:50,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:50,758 INFO L482 AbstractCegarLoop]: Abstraction has 3620 states and 9131 transitions. [2021-06-05 21:03:50,759 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:50,759 INFO L276 IsEmpty]: Start isEmpty. Operand 3620 states and 9131 transitions. [2021-06-05 21:03:50,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 21:03:50,763 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:50,763 INFO L554 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:03:50,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:50,985 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:50,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:50,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1206735419, now seen corresponding path program 21 times [2021-06-05 21:03:50,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:50,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67993937] [2021-06-05 21:03:50,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:50,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:51,037 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 45 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:03:51,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:51,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67993937] [2021-06-05 21:03:51,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67993937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:51,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472341812] [2021-06-05 21:03:51,037 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:51,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 21:03:51,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:03:51,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 21:03:51,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:03:51,174 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 46 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:03:51,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472341812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:51,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:03:51,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 9 [2021-06-05 21:03:51,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487165994] [2021-06-05 21:03:51,174 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:03:51,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:51,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:03:51,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:03:51,175 INFO L87 Difference]: Start difference. First operand 3620 states and 9131 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:51,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:51,332 INFO L93 Difference]: Finished difference Result 4855 states and 11693 transitions. [2021-06-05 21:03:51,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:03:51,332 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 21:03:51,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:51,337 INFO L225 Difference]: With dead ends: 4855 [2021-06-05 21:03:51,337 INFO L226 Difference]: Without dead ends: 4847 [2021-06-05 21:03:51,338 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 59.4ms TimeCoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:03:51,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4847 states. [2021-06-05 21:03:51,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4847 to 3739. [2021-06-05 21:03:51,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3739 states, 3738 states have (on average 2.537720706260032) internal successors, (9486), 3738 states have internal predecessors, (9486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:51,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3739 states to 3739 states and 9486 transitions. [2021-06-05 21:03:51,395 INFO L78 Accepts]: Start accepts. Automaton has 3739 states and 9486 transitions. Word has length 41 [2021-06-05 21:03:51,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:51,395 INFO L482 AbstractCegarLoop]: Abstraction has 3739 states and 9486 transitions. [2021-06-05 21:03:51,395 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:51,395 INFO L276 IsEmpty]: Start isEmpty. Operand 3739 states and 9486 transitions. [2021-06-05 21:03:51,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 21:03:51,399 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:51,399 INFO L554 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:03:51,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:51,620 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:51,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:51,621 INFO L82 PathProgramCache]: Analyzing trace with hash 584855009, now seen corresponding path program 22 times [2021-06-05 21:03:51,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:51,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188100358] [2021-06-05 21:03:51,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:51,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:51,703 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 45 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:03:51,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:51,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188100358] [2021-06-05 21:03:51,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188100358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:51,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166940220] [2021-06-05 21:03:51,704 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:51,740 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:03:51,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:03:51,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 21:03:51,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:03:51,871 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 46 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:03:51,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166940220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:51,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:03:51,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 9 [2021-06-05 21:03:51,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470479244] [2021-06-05 21:03:51,872 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:03:51,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:51,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:03:51,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:03:51,872 INFO L87 Difference]: Start difference. First operand 3739 states and 9486 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:52,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:52,110 INFO L93 Difference]: Finished difference Result 5507 states and 13181 transitions. [2021-06-05 21:03:52,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:03:52,110 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 21:03:52,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:52,117 INFO L225 Difference]: With dead ends: 5507 [2021-06-05 21:03:52,117 INFO L226 Difference]: Without dead ends: 5507 [2021-06-05 21:03:52,125 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 68.4ms TimeCoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:03:52,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5507 states. [2021-06-05 21:03:52,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5507 to 3748. [2021-06-05 21:03:52,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3748 states, 3747 states have (on average 2.536962903656258) internal successors, (9506), 3747 states have internal predecessors, (9506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:52,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3748 states to 3748 states and 9506 transitions. [2021-06-05 21:03:52,210 INFO L78 Accepts]: Start accepts. Automaton has 3748 states and 9506 transitions. Word has length 41 [2021-06-05 21:03:52,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:52,210 INFO L482 AbstractCegarLoop]: Abstraction has 3748 states and 9506 transitions. [2021-06-05 21:03:52,210 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:52,210 INFO L276 IsEmpty]: Start isEmpty. Operand 3748 states and 9506 transitions. [2021-06-05 21:03:52,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 21:03:52,214 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:52,214 INFO L554 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:03:52,430 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2021-06-05 21:03:52,430 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:52,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:52,431 INFO L82 PathProgramCache]: Analyzing trace with hash -1052717447, now seen corresponding path program 23 times [2021-06-05 21:03:52,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:52,431 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262800100] [2021-06-05 21:03:52,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:52,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:52,496 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 43 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:03:52,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:52,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262800100] [2021-06-05 21:03:52,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262800100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:52,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916844499] [2021-06-05 21:03:52,502 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:52,538 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 21:03:52,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:03:52,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 21:03:52,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:03:52,660 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 44 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:03:52,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916844499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:52,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:03:52,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 15 [2021-06-05 21:03:52,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982672550] [2021-06-05 21:03:52,663 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:03:52,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:52,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:03:52,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:03:52,664 INFO L87 Difference]: Start difference. First operand 3748 states and 9506 transitions. Second operand has 16 states, 16 states have (on average 3.375) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:52,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:52,887 INFO L93 Difference]: Finished difference Result 5032 states and 12054 transitions. [2021-06-05 21:03:52,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:03:52,888 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 21:03:52,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:52,892 INFO L225 Difference]: With dead ends: 5032 [2021-06-05 21:03:52,892 INFO L226 Difference]: Without dead ends: 5032 [2021-06-05 21:03:52,892 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 163.2ms TimeCoverageRelationStatistics Valid=148, Invalid=272, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:03:52,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5032 states. [2021-06-05 21:03:52,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5032 to 3584. [2021-06-05 21:03:52,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3584 states, 3583 states have (on average 2.521629919062238) internal successors, (9035), 3583 states have internal predecessors, (9035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:52,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3584 states to 3584 states and 9035 transitions. [2021-06-05 21:03:52,934 INFO L78 Accepts]: Start accepts. Automaton has 3584 states and 9035 transitions. Word has length 41 [2021-06-05 21:03:52,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:52,934 INFO L482 AbstractCegarLoop]: Abstraction has 3584 states and 9035 transitions. [2021-06-05 21:03:52,934 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:52,934 INFO L276 IsEmpty]: Start isEmpty. Operand 3584 states and 9035 transitions. [2021-06-05 21:03:52,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 21:03:52,937 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:52,937 INFO L554 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:03:53,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2021-06-05 21:03:53,138 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:53,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:53,138 INFO L82 PathProgramCache]: Analyzing trace with hash -1317611251, now seen corresponding path program 52 times [2021-06-05 21:03:53,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:53,139 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090558235] [2021-06-05 21:03:53,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:53,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:53,191 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 30 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:03:53,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:53,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090558235] [2021-06-05 21:03:53,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090558235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:53,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145539845] [2021-06-05 21:03:53,191 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 [2021-06-05 21:03:53,214 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:03:53,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:03:53,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 21:03:53,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:03:53,272 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 30 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:03:53,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145539845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:53,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:03:53,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 21:03:53,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921705337] [2021-06-05 21:03:53,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:03:53,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:53,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:03:53,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:03:53,273 INFO L87 Difference]: Start difference. First operand 3584 states and 9035 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:53,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:53,410 INFO L93 Difference]: Finished difference Result 4100 states and 9963 transitions. [2021-06-05 21:03:53,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:03:53,410 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 21:03:53,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:53,414 INFO L225 Difference]: With dead ends: 4100 [2021-06-05 21:03:53,414 INFO L226 Difference]: Without dead ends: 4082 [2021-06-05 21:03:53,414 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 71.1ms TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:03:53,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4082 states. [2021-06-05 21:03:53,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4082 to 3584. [2021-06-05 21:03:53,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3584 states, 3583 states have (on average 2.520234440413062) internal successors, (9030), 3583 states have internal predecessors, (9030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:53,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3584 states to 3584 states and 9030 transitions. [2021-06-05 21:03:53,448 INFO L78 Accepts]: Start accepts. Automaton has 3584 states and 9030 transitions. Word has length 41 [2021-06-05 21:03:53,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:53,448 INFO L482 AbstractCegarLoop]: Abstraction has 3584 states and 9030 transitions. [2021-06-05 21:03:53,448 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:53,448 INFO L276 IsEmpty]: Start isEmpty. Operand 3584 states and 9030 transitions. [2021-06-05 21:03:53,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 21:03:53,450 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:53,451 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:03:53,651 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-06-05 21:03:53,651 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:53,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:53,651 INFO L82 PathProgramCache]: Analyzing trace with hash 1869360074, now seen corresponding path program 24 times [2021-06-05 21:03:53,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:53,651 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051438641] [2021-06-05 21:03:53,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:53,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:53,710 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 6 proven. 57 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:03:53,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:53,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051438641] [2021-06-05 21:03:53,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051438641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:53,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591417323] [2021-06-05 21:03:53,710 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:53,736 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 21:03:53,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:03:53,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:03:53,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:03:53,794 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 58 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:03:53,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591417323] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:53,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:03:53,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 21:03:53,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251041935] [2021-06-05 21:03:53,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:03:53,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:53,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:03:53,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:03:53,795 INFO L87 Difference]: Start difference. First operand 3584 states and 9030 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:54,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:54,029 INFO L93 Difference]: Finished difference Result 4419 states and 10697 transitions. [2021-06-05 21:03:54,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:03:54,029 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 21:03:54,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:54,034 INFO L225 Difference]: With dead ends: 4419 [2021-06-05 21:03:54,035 INFO L226 Difference]: Without dead ends: 4397 [2021-06-05 21:03:54,035 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 82.1ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:03:54,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4397 states. [2021-06-05 21:03:54,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4397 to 3612. [2021-06-05 21:03:54,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3612 states, 3611 states have (on average 2.5206314040432014) internal successors, (9102), 3611 states have internal predecessors, (9102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:54,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3612 states to 3612 states and 9102 transitions. [2021-06-05 21:03:54,076 INFO L78 Accepts]: Start accepts. Automaton has 3612 states and 9102 transitions. Word has length 41 [2021-06-05 21:03:54,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:54,076 INFO L482 AbstractCegarLoop]: Abstraction has 3612 states and 9102 transitions. [2021-06-05 21:03:54,076 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:54,076 INFO L276 IsEmpty]: Start isEmpty. Operand 3612 states and 9102 transitions. [2021-06-05 21:03:54,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 21:03:54,079 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:54,079 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:03:54,279 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable239 [2021-06-05 21:03:54,279 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:54,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:54,279 INFO L82 PathProgramCache]: Analyzing trace with hash -925274230, now seen corresponding path program 53 times [2021-06-05 21:03:54,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:54,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46731709] [2021-06-05 21:03:54,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:54,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:54,335 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 14 proven. 49 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:03:54,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:54,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46731709] [2021-06-05 21:03:54,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46731709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:54,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423722643] [2021-06-05 21:03:54,335 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:54,363 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 21:03:54,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:03:54,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:03:54,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:03:54,449 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 54 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:03:54,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423722643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:54,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:03:54,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 21:03:54,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731035319] [2021-06-05 21:03:54,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:03:54,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:54,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:03:54,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:03:54,450 INFO L87 Difference]: Start difference. First operand 3612 states and 9102 transitions. Second operand has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:54,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:54,808 INFO L93 Difference]: Finished difference Result 4113 states and 10023 transitions. [2021-06-05 21:03:54,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:03:54,808 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 21:03:54,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:54,812 INFO L225 Difference]: With dead ends: 4113 [2021-06-05 21:03:54,812 INFO L226 Difference]: Without dead ends: 4057 [2021-06-05 21:03:54,812 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 82.7ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:03:54,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4057 states. [2021-06-05 21:03:54,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4057 to 3639. [2021-06-05 21:03:54,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3639 states, 3638 states have (on average 2.51456844420011) internal successors, (9148), 3638 states have internal predecessors, (9148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:54,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3639 states to 3639 states and 9148 transitions. [2021-06-05 21:03:54,847 INFO L78 Accepts]: Start accepts. Automaton has 3639 states and 9148 transitions. Word has length 41 [2021-06-05 21:03:54,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:54,847 INFO L482 AbstractCegarLoop]: Abstraction has 3639 states and 9148 transitions. [2021-06-05 21:03:54,847 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:54,847 INFO L276 IsEmpty]: Start isEmpty. Operand 3639 states and 9148 transitions. [2021-06-05 21:03:54,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 21:03:54,875 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:54,875 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:03:55,075 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:55,075 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:55,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:55,076 INFO L82 PathProgramCache]: Analyzing trace with hash -1538810410, now seen corresponding path program 54 times [2021-06-05 21:03:55,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:55,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691643646] [2021-06-05 21:03:55,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:55,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:55,135 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:03:55,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:55,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691643646] [2021-06-05 21:03:55,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691643646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:55,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510093206] [2021-06-05 21:03:55,136 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:55,167 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 21:03:55,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:03:55,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:03:55,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:03:55,226 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:03:55,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510093206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:55,227 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:03:55,227 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 21:03:55,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873627490] [2021-06-05 21:03:55,227 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:03:55,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:55,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:03:55,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:03:55,227 INFO L87 Difference]: Start difference. First operand 3639 states and 9148 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:55,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:55,446 INFO L93 Difference]: Finished difference Result 4375 states and 10599 transitions. [2021-06-05 21:03:55,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:03:55,447 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 21:03:55,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:55,450 INFO L225 Difference]: With dead ends: 4375 [2021-06-05 21:03:55,450 INFO L226 Difference]: Without dead ends: 4363 [2021-06-05 21:03:55,451 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 81.7ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:03:55,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4363 states. [2021-06-05 21:03:55,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4363 to 3649. [2021-06-05 21:03:55,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3649 states, 3648 states have (on average 2.513157894736842) internal successors, (9168), 3648 states have internal predecessors, (9168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:55,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3649 states to 3649 states and 9168 transitions. [2021-06-05 21:03:55,485 INFO L78 Accepts]: Start accepts. Automaton has 3649 states and 9168 transitions. Word has length 41 [2021-06-05 21:03:55,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:55,485 INFO L482 AbstractCegarLoop]: Abstraction has 3649 states and 9168 transitions. [2021-06-05 21:03:55,485 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:55,485 INFO L276 IsEmpty]: Start isEmpty. Operand 3649 states and 9168 transitions. [2021-06-05 21:03:55,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 21:03:55,488 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:55,488 INFO L554 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:03:55,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:55,688 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:55,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:55,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1696109897, now seen corresponding path program 25 times [2021-06-05 21:03:55,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:55,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83818605] [2021-06-05 21:03:55,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:55,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:55,731 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 40 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:03:55,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:55,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83818605] [2021-06-05 21:03:55,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83818605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:55,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749794855] [2021-06-05 21:03:55,731 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:55,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:55,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 21:03:55,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:03:55,815 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 42 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:03:55,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749794855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:55,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:03:55,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 9 [2021-06-05 21:03:55,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200014885] [2021-06-05 21:03:55,815 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:03:55,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:55,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:03:55,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:03:55,815 INFO L87 Difference]: Start difference. First operand 3649 states and 9168 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:55,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:55,951 INFO L93 Difference]: Finished difference Result 4653 states and 11200 transitions. [2021-06-05 21:03:55,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:03:55,951 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 21:03:55,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:55,955 INFO L225 Difference]: With dead ends: 4653 [2021-06-05 21:03:55,955 INFO L226 Difference]: Without dead ends: 4643 [2021-06-05 21:03:55,955 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 59.6ms TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:03:55,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4643 states. [2021-06-05 21:03:55,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4643 to 3759. [2021-06-05 21:03:55,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3759 states, 3758 states have (on average 2.5172964342735495) internal successors, (9460), 3758 states have internal predecessors, (9460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:55,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3759 states to 3759 states and 9460 transitions. [2021-06-05 21:03:55,994 INFO L78 Accepts]: Start accepts. Automaton has 3759 states and 9460 transitions. Word has length 41 [2021-06-05 21:03:55,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:55,994 INFO L482 AbstractCegarLoop]: Abstraction has 3759 states and 9460 transitions. [2021-06-05 21:03:55,994 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:55,994 INFO L276 IsEmpty]: Start isEmpty. Operand 3759 states and 9460 transitions. [2021-06-05 21:03:55,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 21:03:55,997 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:55,997 INFO L554 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:03:56,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:56,198 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:56,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:56,198 INFO L82 PathProgramCache]: Analyzing trace with hash 1107799383, now seen corresponding path program 55 times [2021-06-05 21:03:56,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:56,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187276710] [2021-06-05 21:03:56,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:56,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:56,253 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 22 proven. 43 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:03:56,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:56,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187276710] [2021-06-05 21:03:56,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187276710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:56,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652154550] [2021-06-05 21:03:56,253 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:56,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:56,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 21:03:56,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:03:56,337 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 22 proven. 43 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:03:56,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652154550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:56,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:03:56,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 21:03:56,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971964471] [2021-06-05 21:03:56,337 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:03:56,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:56,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:03:56,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:03:56,337 INFO L87 Difference]: Start difference. First operand 3759 states and 9460 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:56,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:56,456 INFO L93 Difference]: Finished difference Result 4425 states and 10642 transitions. [2021-06-05 21:03:56,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:03:56,456 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 21:03:56,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:56,460 INFO L225 Difference]: With dead ends: 4425 [2021-06-05 21:03:56,460 INFO L226 Difference]: Without dead ends: 4407 [2021-06-05 21:03:56,460 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 55.0ms TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:03:56,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4407 states. [2021-06-05 21:03:56,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4407 to 3746. [2021-06-05 21:03:56,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3746 states, 3745 states have (on average 2.5124165554072095) internal successors, (9409), 3745 states have internal predecessors, (9409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:56,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3746 states to 3746 states and 9409 transitions. [2021-06-05 21:03:56,500 INFO L78 Accepts]: Start accepts. Automaton has 3746 states and 9409 transitions. Word has length 41 [2021-06-05 21:03:56,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:56,500 INFO L482 AbstractCegarLoop]: Abstraction has 3746 states and 9409 transitions. [2021-06-05 21:03:56,500 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:56,500 INFO L276 IsEmpty]: Start isEmpty. Operand 3746 states and 9409 transitions. [2021-06-05 21:03:56,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 21:03:56,503 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:56,503 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:03:56,703 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable245,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:56,704 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:56,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:56,704 INFO L82 PathProgramCache]: Analyzing trace with hash 603106924, now seen corresponding path program 56 times [2021-06-05 21:03:56,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:56,704 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767853903] [2021-06-05 21:03:56,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:56,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:56,767 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 52 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:03:56,767 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:56,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767853903] [2021-06-05 21:03:56,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767853903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:56,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149816375] [2021-06-05 21:03:56,768 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:56,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:03:56,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:03:56,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:03:56,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:03:56,850 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 53 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:03:56,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149816375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:56,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:03:56,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 21:03:56,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972204409] [2021-06-05 21:03:56,851 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:03:56,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:56,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:03:56,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:03:56,851 INFO L87 Difference]: Start difference. First operand 3746 states and 9409 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:57,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:57,189 INFO L93 Difference]: Finished difference Result 5163 states and 12313 transitions. [2021-06-05 21:03:57,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:03:57,189 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 21:03:57,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:57,194 INFO L225 Difference]: With dead ends: 5163 [2021-06-05 21:03:57,194 INFO L226 Difference]: Without dead ends: 5121 [2021-06-05 21:03:57,194 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 125.9ms TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:03:57,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5121 states. [2021-06-05 21:03:57,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5121 to 3767. [2021-06-05 21:03:57,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3767 states, 3766 states have (on average 2.5132766861391396) internal successors, (9465), 3766 states have internal predecessors, (9465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:57,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3767 states to 3767 states and 9465 transitions. [2021-06-05 21:03:57,236 INFO L78 Accepts]: Start accepts. Automaton has 3767 states and 9465 transitions. Word has length 41 [2021-06-05 21:03:57,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:57,236 INFO L482 AbstractCegarLoop]: Abstraction has 3767 states and 9465 transitions. [2021-06-05 21:03:57,236 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:57,236 INFO L276 IsEmpty]: Start isEmpty. Operand 3767 states and 9465 transitions. [2021-06-05 21:03:57,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 21:03:57,239 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:57,239 INFO L554 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:03:57,439 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable248 [2021-06-05 21:03:57,440 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:57,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:57,440 INFO L82 PathProgramCache]: Analyzing trace with hash 2135666033, now seen corresponding path program 57 times [2021-06-05 21:03:57,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:57,440 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981488699] [2021-06-05 21:03:57,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:57,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:57,506 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 45 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:03:57,506 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:57,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981488699] [2021-06-05 21:03:57,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981488699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:57,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501363831] [2021-06-05 21:03:57,506 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:57,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 21:03:57,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:03:57,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 21:03:57,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:03:57,591 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 45 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:03:57,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501363831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:57,591 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:03:57,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 21:03:57,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666005036] [2021-06-05 21:03:57,591 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:03:57,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:57,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:03:57,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:03:57,592 INFO L87 Difference]: Start difference. First operand 3767 states and 9465 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:57,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:57,725 INFO L93 Difference]: Finished difference Result 4453 states and 10682 transitions. [2021-06-05 21:03:57,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:03:57,725 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 21:03:57,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:57,730 INFO L225 Difference]: With dead ends: 4453 [2021-06-05 21:03:57,730 INFO L226 Difference]: Without dead ends: 4429 [2021-06-05 21:03:57,730 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 63.4ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:03:57,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4429 states. [2021-06-05 21:03:57,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4429 to 3631. [2021-06-05 21:03:57,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3631 states, 3630 states have (on average 2.4991735537190083) internal successors, (9072), 3630 states have internal predecessors, (9072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:57,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3631 states to 3631 states and 9072 transitions. [2021-06-05 21:03:57,770 INFO L78 Accepts]: Start accepts. Automaton has 3631 states and 9072 transitions. Word has length 41 [2021-06-05 21:03:57,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:57,770 INFO L482 AbstractCegarLoop]: Abstraction has 3631 states and 9072 transitions. [2021-06-05 21:03:57,770 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:57,770 INFO L276 IsEmpty]: Start isEmpty. Operand 3631 states and 9072 transitions. [2021-06-05 21:03:57,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 21:03:57,773 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:57,773 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:03:57,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable249 [2021-06-05 21:03:57,973 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:57,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:57,974 INFO L82 PathProgramCache]: Analyzing trace with hash 757943458, now seen corresponding path program 58 times [2021-06-05 21:03:57,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:57,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539504327] [2021-06-05 21:03:57,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:57,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:58,039 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:03:58,040 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:58,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539504327] [2021-06-05 21:03:58,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539504327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:58,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173278874] [2021-06-05 21:03:58,040 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 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 [2021-06-05 21:03:58,063 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:03:58,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:03:58,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:03:58,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:03:58,121 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:03:58,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173278874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:58,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:03:58,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 21:03:58,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347435006] [2021-06-05 21:03:58,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:03:58,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:58,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:03:58,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:03:58,122 INFO L87 Difference]: Start difference. First operand 3631 states and 9072 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:58,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:58,473 INFO L93 Difference]: Finished difference Result 4939 states and 11659 transitions. [2021-06-05 21:03:58,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:03:58,473 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 21:03:58,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:58,479 INFO L225 Difference]: With dead ends: 4939 [2021-06-05 21:03:58,479 INFO L226 Difference]: Without dead ends: 4885 [2021-06-05 21:03:58,479 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 133.8ms TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:03:58,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4885 states. [2021-06-05 21:03:58,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4885 to 3618. [2021-06-05 21:03:58,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3618 states, 3617 states have (on average 2.493779375172795) internal successors, (9020), 3617 states have internal predecessors, (9020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:58,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3618 states to 3618 states and 9020 transitions. [2021-06-05 21:03:58,534 INFO L78 Accepts]: Start accepts. Automaton has 3618 states and 9020 transitions. Word has length 41 [2021-06-05 21:03:58,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:58,534 INFO L482 AbstractCegarLoop]: Abstraction has 3618 states and 9020 transitions. [2021-06-05 21:03:58,534 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:58,534 INFO L276 IsEmpty]: Start isEmpty. Operand 3618 states and 9020 transitions. [2021-06-05 21:03:58,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 21:03:58,536 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:58,536 INFO L554 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:03:58,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:58,745 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:58,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:58,745 INFO L82 PathProgramCache]: Analyzing trace with hash -101998469, now seen corresponding path program 26 times [2021-06-05 21:03:58,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:58,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439275553] [2021-06-05 21:03:58,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:58,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:58,787 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 52 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:03:58,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:58,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439275553] [2021-06-05 21:03:58,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439275553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:58,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060800153] [2021-06-05 21:03:58,788 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:58,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:03:58,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:03:58,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 21:03:58,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:03:58,873 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 53 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:03:58,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060800153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:58,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:03:58,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 9 [2021-06-05 21:03:58,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043876357] [2021-06-05 21:03:58,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:03:58,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:58,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:03:58,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:03:58,873 INFO L87 Difference]: Start difference. First operand 3618 states and 9020 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:59,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:59,045 INFO L93 Difference]: Finished difference Result 5763 states and 13661 transitions. [2021-06-05 21:03:59,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:03:59,046 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 21:03:59,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:59,050 INFO L225 Difference]: With dead ends: 5763 [2021-06-05 21:03:59,051 INFO L226 Difference]: Without dead ends: 5763 [2021-06-05 21:03:59,051 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 65.3ms TimeCoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:03:59,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5763 states. [2021-06-05 21:03:59,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5763 to 3703. [2021-06-05 21:03:59,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3703 states, 3702 states have (on average 2.5062128579146408) internal successors, (9278), 3702 states have internal predecessors, (9278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:59,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3703 states to 3703 states and 9278 transitions. [2021-06-05 21:03:59,094 INFO L78 Accepts]: Start accepts. Automaton has 3703 states and 9278 transitions. Word has length 41 [2021-06-05 21:03:59,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:59,094 INFO L482 AbstractCegarLoop]: Abstraction has 3703 states and 9278 transitions. [2021-06-05 21:03:59,094 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:59,094 INFO L276 IsEmpty]: Start isEmpty. Operand 3703 states and 9278 transitions. [2021-06-05 21:03:59,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 21:03:59,097 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:59,097 INFO L554 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:03:59,298 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable254,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:59,298 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:59,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:59,298 INFO L82 PathProgramCache]: Analyzing trace with hash -1739570925, now seen corresponding path program 27 times [2021-06-05 21:03:59,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:59,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504245819] [2021-06-05 21:03:59,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:59,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:59,353 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 51 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:03:59,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:59,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504245819] [2021-06-05 21:03:59,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504245819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:59,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107041218] [2021-06-05 21:03:59,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:59,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 21:03:59,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:03:59,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 21:03:59,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:03:59,445 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 52 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:03:59,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107041218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:59,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:03:59,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 10 [2021-06-05 21:03:59,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542765862] [2021-06-05 21:03:59,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:03:59,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:59,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:03:59,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:03:59,446 INFO L87 Difference]: Start difference. First operand 3703 states and 9278 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:59,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:59,632 INFO L93 Difference]: Finished difference Result 5686 states and 13483 transitions. [2021-06-05 21:03:59,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:03:59,633 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 21:03:59,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:59,637 INFO L225 Difference]: With dead ends: 5686 [2021-06-05 21:03:59,638 INFO L226 Difference]: Without dead ends: 5686 [2021-06-05 21:03:59,638 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 85.4ms TimeCoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:03:59,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5686 states. [2021-06-05 21:03:59,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5686 to 3719. [2021-06-05 21:03:59,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3719 states, 3718 states have (on average 2.5080688542227003) internal successors, (9325), 3718 states have internal predecessors, (9325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:59,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3719 states to 3719 states and 9325 transitions. [2021-06-05 21:03:59,684 INFO L78 Accepts]: Start accepts. Automaton has 3719 states and 9325 transitions. Word has length 41 [2021-06-05 21:03:59,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:59,684 INFO L482 AbstractCegarLoop]: Abstraction has 3719 states and 9325 transitions. [2021-06-05 21:03:59,684 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:59,684 INFO L276 IsEmpty]: Start isEmpty. Operand 3719 states and 9325 transitions. [2021-06-05 21:03:59,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 21:03:59,687 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:59,687 INFO L554 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:03:59,887 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2021-06-05 21:03:59,888 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:59,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:59,888 INFO L82 PathProgramCache]: Analyzing trace with hash 865401207, now seen corresponding path program 28 times [2021-06-05 21:03:59,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:59,888 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426314149] [2021-06-05 21:03:59,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:59,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:59,956 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 44 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:03:59,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:59,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426314149] [2021-06-05 21:03:59,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426314149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:59,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44135572] [2021-06-05 21:03:59,957 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:59,980 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:03:59,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:03:59,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 21:03:59,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:04:00,057 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 45 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:04:00,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44135572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:00,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:04:00,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 11 [2021-06-05 21:04:00,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172937760] [2021-06-05 21:04:00,057 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:04:00,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:04:00,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:04:00,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:04:00,058 INFO L87 Difference]: Start difference. First operand 3719 states and 9325 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:00,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:04:00,252 INFO L93 Difference]: Finished difference Result 4882 states and 11625 transitions. [2021-06-05 21:04:00,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:04:00,252 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 21:04:00,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:04:00,256 INFO L225 Difference]: With dead ends: 4882 [2021-06-05 21:04:00,256 INFO L226 Difference]: Without dead ends: 4882 [2021-06-05 21:04:00,256 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 109.8ms TimeCoverageRelationStatistics Valid=103, Invalid=169, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:04:00,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4882 states. [2021-06-05 21:04:00,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4882 to 3551. [2021-06-05 21:04:00,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3551 states, 3550 states have (on average 2.507887323943662) internal successors, (8903), 3550 states have internal predecessors, (8903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:00,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3551 states to 3551 states and 8903 transitions. [2021-06-05 21:04:00,293 INFO L78 Accepts]: Start accepts. Automaton has 3551 states and 8903 transitions. Word has length 41 [2021-06-05 21:04:00,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:04:00,293 INFO L482 AbstractCegarLoop]: Abstraction has 3551 states and 8903 transitions. [2021-06-05 21:04:00,293 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:00,293 INFO L276 IsEmpty]: Start isEmpty. Operand 3551 states and 8903 transitions. [2021-06-05 21:04:00,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 21:04:00,296 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:04:00,296 INFO L554 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:04:00,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2021-06-05 21:04:00,512 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:04:00,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:04:00,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1144546135, now seen corresponding path program 59 times [2021-06-05 21:04:00,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:04:00,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199748635] [2021-06-05 21:04:00,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:04:00,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:04:00,571 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 26 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:04:00,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:04:00,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199748635] [2021-06-05 21:04:00,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199748635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:00,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003299123] [2021-06-05 21:04:00,572 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:04:00,597 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:04:00,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:04:00,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 21:04:00,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:04:00,678 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 27 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:04:00,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003299123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:00,678 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:04:00,678 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 13 [2021-06-05 21:04:00,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743217275] [2021-06-05 21:04:00,679 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:04:00,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:04:00,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:04:00,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:04:00,679 INFO L87 Difference]: Start difference. First operand 3551 states and 8903 transitions. Second operand has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:00,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:04:00,902 INFO L93 Difference]: Finished difference Result 4193 states and 10086 transitions. [2021-06-05 21:04:00,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:04:00,902 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 21:04:00,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:04:00,906 INFO L225 Difference]: With dead ends: 4193 [2021-06-05 21:04:00,906 INFO L226 Difference]: Without dead ends: 4166 [2021-06-05 21:04:00,906 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 98.2ms TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:04:00,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4166 states. [2021-06-05 21:04:00,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4166 to 3551. [2021-06-05 21:04:00,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3551 states, 3550 states have (on average 2.507042253521127) internal successors, (8900), 3550 states have internal predecessors, (8900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:00,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3551 states to 3551 states and 8900 transitions. [2021-06-05 21:04:00,941 INFO L78 Accepts]: Start accepts. Automaton has 3551 states and 8900 transitions. Word has length 41 [2021-06-05 21:04:00,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:04:00,942 INFO L482 AbstractCegarLoop]: Abstraction has 3551 states and 8900 transitions. [2021-06-05 21:04:00,942 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:00,942 INFO L276 IsEmpty]: Start isEmpty. Operand 3551 states and 8900 transitions. [2021-06-05 21:04:00,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 21:04:00,944 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:04:00,944 INFO L554 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:04:01,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2021-06-05 21:04:01,145 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:04:01,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:04:01,145 INFO L82 PathProgramCache]: Analyzing trace with hash -245347661, now seen corresponding path program 60 times [2021-06-05 21:04:01,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:04:01,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338347268] [2021-06-05 21:04:01,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:04:01,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:04:01,194 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 24 proven. 39 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:04:01,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:04:01,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338347268] [2021-06-05 21:04:01,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338347268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:01,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194083450] [2021-06-05 21:04:01,194 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:04:01,220 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 21:04:01,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:04:01,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 21:04:01,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:04:01,275 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 24 proven. 39 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:04:01,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194083450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:01,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:04:01,276 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 21:04:01,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149161830] [2021-06-05 21:04:01,276 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:04:01,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:04:01,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:04:01,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:04:01,276 INFO L87 Difference]: Start difference. First operand 3551 states and 8900 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:01,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:04:01,396 INFO L93 Difference]: Finished difference Result 4381 states and 10397 transitions. [2021-06-05 21:04:01,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:04:01,396 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 21:04:01,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:04:01,400 INFO L225 Difference]: With dead ends: 4381 [2021-06-05 21:04:01,400 INFO L226 Difference]: Without dead ends: 4363 [2021-06-05 21:04:01,400 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 56.7ms TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:04:01,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4363 states. [2021-06-05 21:04:01,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4363 to 3551. [2021-06-05 21:04:01,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3551 states, 3550 states have (on average 2.5019718309859154) internal successors, (8882), 3550 states have internal predecessors, (8882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:01,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3551 states to 3551 states and 8882 transitions. [2021-06-05 21:04:01,436 INFO L78 Accepts]: Start accepts. Automaton has 3551 states and 8882 transitions. Word has length 41 [2021-06-05 21:04:01,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:04:01,436 INFO L482 AbstractCegarLoop]: Abstraction has 3551 states and 8882 transitions. [2021-06-05 21:04:01,436 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:01,436 INFO L276 IsEmpty]: Start isEmpty. Operand 3551 states and 8882 transitions. [2021-06-05 21:04:01,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 21:04:01,438 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:04:01,438 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:04:01,639 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:04:01,639 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:04:01,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:04:01,639 INFO L82 PathProgramCache]: Analyzing trace with hash -1693347674, now seen corresponding path program 61 times [2021-06-05 21:04:01,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:04:01,639 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101886526] [2021-06-05 21:04:01,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:04:01,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:04:01,721 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 14 proven. 49 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:04:01,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:04:01,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101886526] [2021-06-05 21:04:01,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101886526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:01,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637272620] [2021-06-05 21:04:01,722 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:04:01,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:04:01,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:04:01,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:04:01,837 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 54 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:04:01,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637272620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:01,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:04:01,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 21:04:01,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246845705] [2021-06-05 21:04:01,837 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:04:01,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:04:01,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:04:01,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:04:01,838 INFO L87 Difference]: Start difference. First operand 3551 states and 8882 transitions. Second operand has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:02,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:04:02,161 INFO L93 Difference]: Finished difference Result 4355 states and 10366 transitions. [2021-06-05 21:04:02,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:04:02,162 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 21:04:02,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:04:02,165 INFO L225 Difference]: With dead ends: 4355 [2021-06-05 21:04:02,165 INFO L226 Difference]: Without dead ends: 4156 [2021-06-05 21:04:02,165 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 106.7ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:04:02,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4156 states. [2021-06-05 21:04:02,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4156 to 3529. [2021-06-05 21:04:02,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3529 states, 3528 states have (on average 2.484126984126984) internal successors, (8764), 3528 states have internal predecessors, (8764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:02,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3529 states to 3529 states and 8764 transitions. [2021-06-05 21:04:02,199 INFO L78 Accepts]: Start accepts. Automaton has 3529 states and 8764 transitions. Word has length 41 [2021-06-05 21:04:02,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:04:02,199 INFO L482 AbstractCegarLoop]: Abstraction has 3529 states and 8764 transitions. [2021-06-05 21:04:02,199 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:02,199 INFO L276 IsEmpty]: Start isEmpty. Operand 3529 states and 8764 transitions. [2021-06-05 21:04:02,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 21:04:02,201 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:04:02,201 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:04:02,402 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2021-06-05 21:04:02,402 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:04:02,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:04:02,402 INFO L82 PathProgramCache]: Analyzing trace with hash 1988083442, now seen corresponding path program 62 times [2021-06-05 21:04:02,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:04:02,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512123260] [2021-06-05 21:04:02,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:04:02,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:04:02,462 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:04:02,462 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:04:02,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512123260] [2021-06-05 21:04:02,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512123260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:02,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392131887] [2021-06-05 21:04:02,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 21:04:02,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:04:02,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:04:02,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:04:02,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:04:02,561 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:04:02,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392131887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:02,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:04:02,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 21:04:02,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78546302] [2021-06-05 21:04:02,562 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:04:02,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:04:02,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:04:02,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:04:02,562 INFO L87 Difference]: Start difference. First operand 3529 states and 8764 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:02,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:04:02,791 INFO L93 Difference]: Finished difference Result 4389 states and 10491 transitions. [2021-06-05 21:04:02,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:04:02,791 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 21:04:02,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:04:02,795 INFO L225 Difference]: With dead ends: 4389 [2021-06-05 21:04:02,795 INFO L226 Difference]: Without dead ends: 4377 [2021-06-05 21:04:02,795 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 90.0ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:04:02,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4377 states. [2021-06-05 21:04:02,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4377 to 3601. [2021-06-05 21:04:02,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3601 states, 3600 states have (on average 2.4819444444444443) internal successors, (8935), 3600 states have internal predecessors, (8935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:02,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3601 states to 3601 states and 8935 transitions. [2021-06-05 21:04:02,833 INFO L78 Accepts]: Start accepts. Automaton has 3601 states and 8935 transitions. Word has length 41 [2021-06-05 21:04:02,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:04:02,834 INFO L482 AbstractCegarLoop]: Abstraction has 3601 states and 8935 transitions. [2021-06-05 21:04:02,834 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:02,834 INFO L276 IsEmpty]: Start isEmpty. Operand 3601 states and 8935 transitions. [2021-06-05 21:04:02,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 21:04:02,836 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:04:02,836 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:04:03,037 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable266,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:04:03,037 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:04:03,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:04:03,037 INFO L82 PathProgramCache]: Analyzing trace with hash -164966520, now seen corresponding path program 63 times [2021-06-05 21:04:03,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:04:03,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630914277] [2021-06-05 21:04:03,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:04:03,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:04:03,096 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 52 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:04:03,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:04:03,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630914277] [2021-06-05 21:04:03,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630914277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:03,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856508438] [2021-06-05 21:04:03,097 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 21:04:03,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 21:04:03,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:04:03,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:04:03,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:04:03,183 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 53 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:04:03,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856508438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:03,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:04:03,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 21:04:03,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903670791] [2021-06-05 21:04:03,184 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:04:03,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:04:03,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:04:03,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:04:03,184 INFO L87 Difference]: Start difference. First operand 3601 states and 8935 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:03,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:04:03,547 INFO L93 Difference]: Finished difference Result 5587 states and 13170 transitions. [2021-06-05 21:04:03,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:04:03,547 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 21:04:03,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:04:03,552 INFO L225 Difference]: With dead ends: 5587 [2021-06-05 21:04:03,553 INFO L226 Difference]: Without dead ends: 5533 [2021-06-05 21:04:03,553 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 141.0ms TimeCoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:04:03,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5533 states. [2021-06-05 21:04:03,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5533 to 3793. [2021-06-05 21:04:03,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3793 states, 3792 states have (on average 2.4897151898734178) internal successors, (9441), 3792 states have internal predecessors, (9441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:03,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3793 states to 3793 states and 9441 transitions. [2021-06-05 21:04:03,600 INFO L78 Accepts]: Start accepts. Automaton has 3793 states and 9441 transitions. Word has length 41 [2021-06-05 21:04:03,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:04:03,600 INFO L482 AbstractCegarLoop]: Abstraction has 3793 states and 9441 transitions. [2021-06-05 21:04:03,600 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:03,600 INFO L276 IsEmpty]: Start isEmpty. Operand 3793 states and 9441 transitions. [2021-06-05 21:04:03,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 21:04:03,603 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:04:03,603 INFO L554 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:04:03,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable267 [2021-06-05 21:04:03,809 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:04:03,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:04:03,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1367592589, now seen corresponding path program 64 times [2021-06-05 21:04:03,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:04:03,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934524805] [2021-06-05 21:04:03,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:04:03,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:04:03,862 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 19 proven. 47 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:04:03,863 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:04:03,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934524805] [2021-06-05 21:04:03,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934524805] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:03,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321177495] [2021-06-05 21:04:03,863 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:04:03,886 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:04:03,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:04:03,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 21:04:03,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:04:03,965 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 19 proven. 47 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:04:03,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321177495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:03,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:04:03,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 21:04:03,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012743547] [2021-06-05 21:04:03,966 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:04:03,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:04:03,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:04:03,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:04:03,966 INFO L87 Difference]: Start difference. First operand 3793 states and 9441 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:04,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:04:04,100 INFO L93 Difference]: Finished difference Result 4607 states and 10909 transitions. [2021-06-05 21:04:04,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:04:04,101 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 21:04:04,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:04:04,104 INFO L225 Difference]: With dead ends: 4607 [2021-06-05 21:04:04,104 INFO L226 Difference]: Without dead ends: 4583 [2021-06-05 21:04:04,105 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 64.0ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:04:04,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4583 states. [2021-06-05 21:04:04,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4583 to 3793. [2021-06-05 21:04:04,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3793 states, 3792 states have (on average 2.485495780590717) internal successors, (9425), 3792 states have internal predecessors, (9425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:04,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3793 states to 3793 states and 9425 transitions. [2021-06-05 21:04:04,142 INFO L78 Accepts]: Start accepts. Automaton has 3793 states and 9425 transitions. Word has length 41 [2021-06-05 21:04:04,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:04:04,142 INFO L482 AbstractCegarLoop]: Abstraction has 3793 states and 9425 transitions. [2021-06-05 21:04:04,142 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:04,143 INFO L276 IsEmpty]: Start isEmpty. Operand 3793 states and 9425 transitions. [2021-06-05 21:04:04,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 21:04:04,145 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:04:04,145 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:04:04,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2021-06-05 21:04:04,349 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:04:04,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:04:04,349 INFO L82 PathProgramCache]: Analyzing trace with hash -10129986, now seen corresponding path program 65 times [2021-06-05 21:04:04,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:04:04,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100519229] [2021-06-05 21:04:04,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:04:04,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:04:04,411 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 52 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:04:04,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:04:04,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100519229] [2021-06-05 21:04:04,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100519229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:04,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912118104] [2021-06-05 21:04:04,412 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 21:04:04,437 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 21:04:04,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:04:04,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:04:04,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:04:04,494 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 53 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:04:04,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912118104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:04,494 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:04:04,494 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 21:04:04,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392776982] [2021-06-05 21:04:04,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:04:04,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:04:04,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:04:04,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:04:04,495 INFO L87 Difference]: Start difference. First operand 3793 states and 9425 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:04,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:04:04,987 INFO L93 Difference]: Finished difference Result 7022 states and 16378 transitions. [2021-06-05 21:04:04,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 21:04:04,988 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 21:04:04,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:04:04,994 INFO L225 Difference]: With dead ends: 7022 [2021-06-05 21:04:04,994 INFO L226 Difference]: Without dead ends: 6908 [2021-06-05 21:04:04,995 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 241.6ms TimeCoverageRelationStatistics Valid=165, Invalid=891, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 21:04:05,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6908 states. [2021-06-05 21:04:05,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6908 to 3954. [2021-06-05 21:04:05,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3954 states, 3953 states have (on average 2.489501644320769) internal successors, (9841), 3953 states have internal predecessors, (9841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:05,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3954 states to 3954 states and 9841 transitions. [2021-06-05 21:04:05,052 INFO L78 Accepts]: Start accepts. Automaton has 3954 states and 9841 transitions. Word has length 41 [2021-06-05 21:04:05,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:04:05,052 INFO L482 AbstractCegarLoop]: Abstraction has 3954 states and 9841 transitions. [2021-06-05 21:04:05,052 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:05,052 INFO L276 IsEmpty]: Start isEmpty. Operand 3954 states and 9841 transitions. [2021-06-05 21:04:05,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 21:04:05,055 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:04:05,055 INFO L554 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:04:05,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:04:05,257 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:04:05,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:04:05,257 INFO L82 PathProgramCache]: Analyzing trace with hash 376472691, now seen corresponding path program 66 times [2021-06-05 21:04:05,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:04:05,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724498548] [2021-06-05 21:04:05,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:04:05,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:04:05,315 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 20 proven. 46 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:04:05,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:04:05,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724498548] [2021-06-05 21:04:05,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724498548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:05,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107511681] [2021-06-05 21:04:05,316 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:04:05,340 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 21:04:05,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:04:05,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 21:04:05,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:04:05,400 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 20 proven. 46 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:04:05,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107511681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:05,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:04:05,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 21:04:05,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185149260] [2021-06-05 21:04:05,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:04:05,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:04:05,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:04:05,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:04:05,401 INFO L87 Difference]: Start difference. First operand 3954 states and 9841 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:05,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:04:05,553 INFO L93 Difference]: Finished difference Result 4805 states and 11375 transitions. [2021-06-05 21:04:05,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:04:05,554 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 21:04:05,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:04:05,558 INFO L225 Difference]: With dead ends: 4805 [2021-06-05 21:04:05,558 INFO L226 Difference]: Without dead ends: 4772 [2021-06-05 21:04:05,558 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 79.1ms TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:04:05,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4772 states. [2021-06-05 21:04:05,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4772 to 3796. [2021-06-05 21:04:05,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3796 states, 3795 states have (on average 2.477470355731225) internal successors, (9402), 3795 states have internal predecessors, (9402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:05,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3796 states to 3796 states and 9402 transitions. [2021-06-05 21:04:05,610 INFO L78 Accepts]: Start accepts. Automaton has 3796 states and 9402 transitions. Word has length 41 [2021-06-05 21:04:05,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:04:05,610 INFO L482 AbstractCegarLoop]: Abstraction has 3796 states and 9402 transitions. [2021-06-05 21:04:05,610 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:05,610 INFO L276 IsEmpty]: Start isEmpty. Operand 3796 states and 9402 transitions. [2021-06-05 21:04:05,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 21:04:05,612 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:04:05,612 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:04:05,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable273 [2021-06-05 21:04:05,813 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:04:05,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:04:05,813 INFO L82 PathProgramCache]: Analyzing trace with hash -69821496, now seen corresponding path program 67 times [2021-06-05 21:04:05,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:04:05,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328434486] [2021-06-05 21:04:05,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:04:05,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:04:05,895 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:04:05,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:04:05,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328434486] [2021-06-05 21:04:05,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328434486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:05,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731857406] [2021-06-05 21:04:05,896 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:04:05,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:04:05,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:04:05,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:04:05,995 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:04:05,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731857406] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:05,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:04:05,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 21:04:05,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007425990] [2021-06-05 21:04:05,995 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:04:05,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:04:05,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:04:05,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:04:05,996 INFO L87 Difference]: Start difference. First operand 3796 states and 9402 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:06,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:04:06,361 INFO L93 Difference]: Finished difference Result 5143 states and 11987 transitions. [2021-06-05 21:04:06,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:04:06,361 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 21:04:06,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:04:06,366 INFO L225 Difference]: With dead ends: 5143 [2021-06-05 21:04:06,366 INFO L226 Difference]: Without dead ends: 4987 [2021-06-05 21:04:06,366 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 177.6ms TimeCoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:04:06,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4987 states. [2021-06-05 21:04:06,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4987 to 3332. [2021-06-05 21:04:06,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3332 states, 3331 states have (on average 2.4377063944761335) internal successors, (8120), 3331 states have internal predecessors, (8120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:06,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3332 states to 3332 states and 8120 transitions. [2021-06-05 21:04:06,401 INFO L78 Accepts]: Start accepts. Automaton has 3332 states and 8120 transitions. Word has length 41 [2021-06-05 21:04:06,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:04:06,401 INFO L482 AbstractCegarLoop]: Abstraction has 3332 states and 8120 transitions. [2021-06-05 21:04:06,401 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:06,401 INFO L276 IsEmpty]: Start isEmpty. Operand 3332 states and 8120 transitions. [2021-06-05 21:04:06,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 21:04:06,403 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:04:06,403 INFO L554 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:04:06,603 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable278 [2021-06-05 21:04:06,603 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:04:06,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:04:06,604 INFO L82 PathProgramCache]: Analyzing trace with hash -307883013, now seen corresponding path program 29 times [2021-06-05 21:04:06,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:04:06,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973768238] [2021-06-05 21:04:06,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:04:06,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:04:06,646 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 53 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:04:06,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:04:06,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973768238] [2021-06-05 21:04:06,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973768238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:06,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513650789] [2021-06-05 21:04:06,647 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:04:06,677 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 21:04:06,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:04:06,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 21:04:06,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:04:06,742 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 54 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:04:06,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513650789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:06,743 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:04:06,743 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 10 [2021-06-05 21:04:06,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160182882] [2021-06-05 21:04:06,743 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:04:06,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:04:06,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:04:06,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:04:06,743 INFO L87 Difference]: Start difference. First operand 3332 states and 8120 transitions. Second operand has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:06,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:04:06,886 INFO L93 Difference]: Finished difference Result 4368 states and 10283 transitions. [2021-06-05 21:04:06,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:04:06,886 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 21:04:06,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:04:06,890 INFO L225 Difference]: With dead ends: 4368 [2021-06-05 21:04:06,890 INFO L226 Difference]: Without dead ends: 4354 [2021-06-05 21:04:06,890 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 55.9ms TimeCoverageRelationStatistics Valid=64, Invalid=92, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:04:06,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4354 states. [2021-06-05 21:04:06,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4354 to 3443. [2021-06-05 21:04:06,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3443 states, 3442 states have (on average 2.4468332364904124) internal successors, (8422), 3442 states have internal predecessors, (8422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:06,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3443 states to 3443 states and 8422 transitions. [2021-06-05 21:04:06,927 INFO L78 Accepts]: Start accepts. Automaton has 3443 states and 8422 transitions. Word has length 41 [2021-06-05 21:04:06,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:04:06,928 INFO L482 AbstractCegarLoop]: Abstraction has 3443 states and 8422 transitions. [2021-06-05 21:04:06,928 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:06,928 INFO L276 IsEmpty]: Start isEmpty. Operand 3443 states and 8422 transitions. [2021-06-05 21:04:06,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 21:04:06,930 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:04:06,930 INFO L554 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:04:07,130 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2021-06-05 21:04:07,130 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:04:07,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:04:07,131 INFO L82 PathProgramCache]: Analyzing trace with hash -929763423, now seen corresponding path program 30 times [2021-06-05 21:04:07,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:04:07,131 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980787883] [2021-06-05 21:04:07,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:04:07,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:04:07,174 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 53 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:04:07,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:04:07,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980787883] [2021-06-05 21:04:07,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980787883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:07,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611800242] [2021-06-05 21:04:07,174 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:04:07,201 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 21:04:07,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:04:07,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:04:07,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:04:07,270 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 56 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:04:07,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611800242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:07,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:04:07,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 10 [2021-06-05 21:04:07,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248062641] [2021-06-05 21:04:07,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:04:07,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:04:07,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:04:07,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:04:07,271 INFO L87 Difference]: Start difference. First operand 3443 states and 8422 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:07,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:04:07,497 INFO L93 Difference]: Finished difference Result 4338 states and 10163 transitions. [2021-06-05 21:04:07,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:04:07,497 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 21:04:07,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:04:07,501 INFO L225 Difference]: With dead ends: 4338 [2021-06-05 21:04:07,502 INFO L226 Difference]: Without dead ends: 4338 [2021-06-05 21:04:07,502 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 105.8ms TimeCoverageRelationStatistics Valid=113, Invalid=159, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:04:07,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4338 states. [2021-06-05 21:04:07,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4338 to 3179. [2021-06-05 21:04:07,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3179 states, 3178 states have (on average 2.4389553178099432) internal successors, (7751), 3178 states have internal predecessors, (7751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:07,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3179 states to 3179 states and 7751 transitions. [2021-06-05 21:04:07,533 INFO L78 Accepts]: Start accepts. Automaton has 3179 states and 7751 transitions. Word has length 41 [2021-06-05 21:04:07,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:04:07,533 INFO L482 AbstractCegarLoop]: Abstraction has 3179 states and 7751 transitions. [2021-06-05 21:04:07,533 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:07,533 INFO L276 IsEmpty]: Start isEmpty. Operand 3179 states and 7751 transitions. [2021-06-05 21:04:07,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 21:04:07,535 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:04:07,535 INFO L554 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:04:07,735 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable281,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:04:07,735 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:04:07,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:04:07,736 INFO L82 PathProgramCache]: Analyzing trace with hash 1823751373, now seen corresponding path program 68 times [2021-06-05 21:04:07,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:04:07,736 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433672439] [2021-06-05 21:04:07,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:04:07,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:04:07,815 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 28 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:04:07,815 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:04:07,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433672439] [2021-06-05 21:04:07,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433672439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:07,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830352222] [2021-06-05 21:04:07,815 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:04:07,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:04:07,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:04:07,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 21:04:07,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:04:07,920 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 28 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:04:07,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830352222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:07,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:04:07,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 21:04:07,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461062587] [2021-06-05 21:04:07,920 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:04:07,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:04:07,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:04:07,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:04:07,921 INFO L87 Difference]: Start difference. First operand 3179 states and 7751 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:08,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:04:08,118 INFO L93 Difference]: Finished difference Result 3775 states and 8829 transitions. [2021-06-05 21:04:08,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:04:08,118 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 21:04:08,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:04:08,122 INFO L225 Difference]: With dead ends: 3775 [2021-06-05 21:04:08,122 INFO L226 Difference]: Without dead ends: 3739 [2021-06-05 21:04:08,122 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 115.6ms TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:04:08,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3739 states. [2021-06-05 21:04:08,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3739 to 3188. [2021-06-05 21:04:08,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3188 states, 3187 states have (on average 2.4339504235958582) internal successors, (7757), 3187 states have internal predecessors, (7757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:08,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3188 states to 3188 states and 7757 transitions. [2021-06-05 21:04:08,169 INFO L78 Accepts]: Start accepts. Automaton has 3188 states and 7757 transitions. Word has length 41 [2021-06-05 21:04:08,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:04:08,169 INFO L482 AbstractCegarLoop]: Abstraction has 3188 states and 7757 transitions. [2021-06-05 21:04:08,169 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:08,169 INFO L276 IsEmpty]: Start isEmpty. Operand 3188 states and 7757 transitions. [2021-06-05 21:04:08,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 21:04:08,172 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:04:08,172 INFO L554 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:04:08,394 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:04:08,394 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:04:08,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:04:08,395 INFO L82 PathProgramCache]: Analyzing trace with hash 370314101, now seen corresponding path program 69 times [2021-06-05 21:04:08,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:04:08,395 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267821461] [2021-06-05 21:04:08,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:04:08,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:04:08,481 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 33 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:04:08,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:04:08,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267821461] [2021-06-05 21:04:08,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267821461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:08,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181166910] [2021-06-05 21:04:08,481 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:04:08,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 21:04:08,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:04:08,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 21:04:08,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:04:08,591 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 33 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:04:08,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181166910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:08,591 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:04:08,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 21:04:08,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23450933] [2021-06-05 21:04:08,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:04:08,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:04:08,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:04:08,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:04:08,592 INFO L87 Difference]: Start difference. First operand 3188 states and 7757 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:08,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:04:08,857 INFO L93 Difference]: Finished difference Result 4138 states and 9762 transitions. [2021-06-05 21:04:08,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:04:08,857 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 21:04:08,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:04:08,862 INFO L225 Difference]: With dead ends: 4138 [2021-06-05 21:04:08,862 INFO L226 Difference]: Without dead ends: 4138 [2021-06-05 21:04:08,862 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 147.7ms TimeCoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:04:08,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4138 states. [2021-06-05 21:04:08,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4138 to 3170. [2021-06-05 21:04:08,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3170 states, 3169 states have (on average 2.454717576522562) internal successors, (7779), 3169 states have internal predecessors, (7779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:08,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3170 states to 3170 states and 7779 transitions. [2021-06-05 21:04:08,909 INFO L78 Accepts]: Start accepts. Automaton has 3170 states and 7779 transitions. Word has length 41 [2021-06-05 21:04:08,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:04:08,909 INFO L482 AbstractCegarLoop]: Abstraction has 3170 states and 7779 transitions. [2021-06-05 21:04:08,909 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:08,909 INFO L276 IsEmpty]: Start isEmpty. Operand 3170 states and 7779 transitions. [2021-06-05 21:04:08,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 21:04:08,912 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:04:08,912 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:04:09,134 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable290 [2021-06-05 21:04:09,134 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:04:09,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:04:09,135 INFO L82 PathProgramCache]: Analyzing trace with hash 1062684898, now seen corresponding path program 31 times [2021-06-05 21:04:09,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:04:09,135 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282729909] [2021-06-05 21:04:09,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:04:09,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:04:09,224 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:04:09,224 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:04:09,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282729909] [2021-06-05 21:04:09,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282729909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:09,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099339428] [2021-06-05 21:04:09,225 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:04:09,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:04:09,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:04:09,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:04:09,323 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:04:09,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099339428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:09,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:04:09,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 21:04:09,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213390253] [2021-06-05 21:04:09,325 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:04:09,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:04:09,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:04:09,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:04:09,325 INFO L87 Difference]: Start difference. First operand 3170 states and 7779 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:09,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:04:09,783 INFO L93 Difference]: Finished difference Result 4257 states and 9988 transitions. [2021-06-05 21:04:09,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:04:09,784 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 21:04:09,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:04:09,788 INFO L225 Difference]: With dead ends: 4257 [2021-06-05 21:04:09,788 INFO L226 Difference]: Without dead ends: 4227 [2021-06-05 21:04:09,788 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 212.5ms TimeCoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:04:09,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4227 states. [2021-06-05 21:04:09,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4227 to 3157. [2021-06-05 21:04:09,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3157 states, 3156 states have (on average 2.459442332065906) internal successors, (7762), 3156 states have internal predecessors, (7762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:09,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3157 states to 3157 states and 7762 transitions. [2021-06-05 21:04:09,835 INFO L78 Accepts]: Start accepts. Automaton has 3157 states and 7762 transitions. Word has length 41 [2021-06-05 21:04:09,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:04:09,835 INFO L482 AbstractCegarLoop]: Abstraction has 3157 states and 7762 transitions. [2021-06-05 21:04:09,835 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:09,835 INFO L276 IsEmpty]: Start isEmpty. Operand 3157 states and 7762 transitions. [2021-06-05 21:04:09,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 21:04:09,838 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:04:09,838 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:04:10,059 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable291,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:04:10,059 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:04:10,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:04:10,060 INFO L82 PathProgramCache]: Analyzing trace with hash 900632802, now seen corresponding path program 70 times [2021-06-05 21:04:10,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:04:10,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144487644] [2021-06-05 21:04:10,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:04:10,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:04:10,161 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 12 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:04:10,161 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:04:10,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144487644] [2021-06-05 21:04:10,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144487644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:10,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083690523] [2021-06-05 21:04:10,161 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:04:10,191 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:04:10,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:04:10,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:04:10,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:04:10,391 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:04:10,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083690523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:10,391 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:04:10,391 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 21:04:10,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861835031] [2021-06-05 21:04:10,392 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:04:10,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:04:10,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:04:10,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:04:10,392 INFO L87 Difference]: Start difference. First operand 3157 states and 7762 transitions. Second operand has 15 states, 15 states have (on average 3.6) internal successors, (54), 14 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:10,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:04:10,791 INFO L93 Difference]: Finished difference Result 3218 states and 7858 transitions. [2021-06-05 21:04:10,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:04:10,791 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 14 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 21:04:10,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:04:10,795 INFO L225 Difference]: With dead ends: 3218 [2021-06-05 21:04:10,795 INFO L226 Difference]: Without dead ends: 3174 [2021-06-05 21:04:10,795 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 151.2ms TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:04:10,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3174 states. [2021-06-05 21:04:10,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3174 to 3157. [2021-06-05 21:04:10,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3157 states, 3156 states have (on average 2.45659062103929) internal successors, (7753), 3156 states have internal predecessors, (7753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:10,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3157 states to 3157 states and 7753 transitions. [2021-06-05 21:04:10,835 INFO L78 Accepts]: Start accepts. Automaton has 3157 states and 7753 transitions. Word has length 41 [2021-06-05 21:04:10,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:04:10,835 INFO L482 AbstractCegarLoop]: Abstraction has 3157 states and 7753 transitions. [2021-06-05 21:04:10,835 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 14 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:10,835 INFO L276 IsEmpty]: Start isEmpty. Operand 3157 states and 7753 transitions. [2021-06-05 21:04:10,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 21:04:10,838 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:04:10,838 INFO L554 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:04:11,059 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable292 [2021-06-05 21:04:11,060 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:04:11,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:04:11,060 INFO L82 PathProgramCache]: Analyzing trace with hash -514678441, now seen corresponding path program 71 times [2021-06-05 21:04:11,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:04:11,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405800851] [2021-06-05 21:04:11,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:04:11,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:04:11,132 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 31 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:04:11,132 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:04:11,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405800851] [2021-06-05 21:04:11,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405800851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:11,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715642455] [2021-06-05 21:04:11,132 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 21:04:11,164 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 21:04:11,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:04:11,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 21:04:11,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:04:11,248 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 33 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:04:11,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715642455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:11,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:04:11,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 12 [2021-06-05 21:04:11,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114754626] [2021-06-05 21:04:11,249 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:04:11,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:04:11,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:04:11,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:04:11,249 INFO L87 Difference]: Start difference. First operand 3157 states and 7753 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:11,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:04:11,517 INFO L93 Difference]: Finished difference Result 4264 states and 10096 transitions. [2021-06-05 21:04:11,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:04:11,517 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 21:04:11,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:04:11,522 INFO L225 Difference]: With dead ends: 4264 [2021-06-05 21:04:11,522 INFO L226 Difference]: Without dead ends: 4264 [2021-06-05 21:04:11,522 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 121.3ms TimeCoverageRelationStatistics Valid=116, Invalid=190, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:04:11,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4264 states. [2021-06-05 21:04:11,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4264 to 3336. [2021-06-05 21:04:11,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3336 states, 3335 states have (on average 2.489055472263868) internal successors, (8301), 3335 states have internal predecessors, (8301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:11,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3336 states to 3336 states and 8301 transitions. [2021-06-05 21:04:11,580 INFO L78 Accepts]: Start accepts. Automaton has 3336 states and 8301 transitions. Word has length 41 [2021-06-05 21:04:11,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:04:11,580 INFO L482 AbstractCegarLoop]: Abstraction has 3336 states and 8301 transitions. [2021-06-05 21:04:11,580 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:11,580 INFO L276 IsEmpty]: Start isEmpty. Operand 3336 states and 8301 transitions. [2021-06-05 21:04:11,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 21:04:11,584 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:04:11,584 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:04:11,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable293,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:04:11,805 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:04:11,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:04:11,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1038909258, now seen corresponding path program 32 times [2021-06-05 21:04:11,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:04:11,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932916577] [2021-06-05 21:04:11,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:04:11,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:04:11,891 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:04:11,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:04:11,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932916577] [2021-06-05 21:04:11,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932916577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:11,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240689208] [2021-06-05 21:04:11,891 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 [2021-06-05 21:04:11,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:04:11,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:04:11,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:04:11,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:04:11,990 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:04:11,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240689208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:11,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:04:11,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 21:04:11,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091841392] [2021-06-05 21:04:11,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:04:11,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:04:11,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:04:11,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:04:11,991 INFO L87 Difference]: Start difference. First operand 3336 states and 8301 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:12,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:04:12,356 INFO L93 Difference]: Finished difference Result 4243 states and 10191 transitions. [2021-06-05 21:04:12,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:04:12,356 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 21:04:12,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:04:12,361 INFO L225 Difference]: With dead ends: 4243 [2021-06-05 21:04:12,361 INFO L226 Difference]: Without dead ends: 4243 [2021-06-05 21:04:12,361 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 166.3ms TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:04:12,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4243 states. [2021-06-05 21:04:12,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4243 to 3327. [2021-06-05 21:04:12,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3327 states, 3326 states have (on average 2.495189416716777) internal successors, (8299), 3326 states have internal predecessors, (8299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:12,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3327 states to 3327 states and 8299 transitions. [2021-06-05 21:04:12,411 INFO L78 Accepts]: Start accepts. Automaton has 3327 states and 8299 transitions. Word has length 41 [2021-06-05 21:04:12,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:04:12,411 INFO L482 AbstractCegarLoop]: Abstraction has 3327 states and 8299 transitions. [2021-06-05 21:04:12,411 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:12,412 INFO L276 IsEmpty]: Start isEmpty. Operand 3327 states and 8299 transitions. [2021-06-05 21:04:12,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 21:04:12,415 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:04:12,415 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:04:12,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:04:12,636 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:04:12,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:04:12,636 INFO L82 PathProgramCache]: Analyzing trace with hash 862018314, now seen corresponding path program 72 times [2021-06-05 21:04:12,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:04:12,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059303855] [2021-06-05 21:04:12,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:04:12,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:04:12,746 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 12 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:04:12,747 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:04:12,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059303855] [2021-06-05 21:04:12,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059303855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:12,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224903070] [2021-06-05 21:04:12,747 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:04:12,779 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 21:04:12,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:04:12,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:04:12,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:04:12,914 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:04:12,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224903070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:12,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:04:12,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 21:04:12,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512864619] [2021-06-05 21:04:12,914 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:04:12,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:04:12,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:04:12,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:04:12,915 INFO L87 Difference]: Start difference. First operand 3327 states and 8299 transitions. Second operand has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:13,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:04:13,298 INFO L93 Difference]: Finished difference Result 3397 states and 8404 transitions. [2021-06-05 21:04:13,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:04:13,298 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 21:04:13,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:04:13,302 INFO L225 Difference]: With dead ends: 3397 [2021-06-05 21:04:13,302 INFO L226 Difference]: Without dead ends: 3365 [2021-06-05 21:04:13,302 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 143.4ms TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:04:13,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3365 states. [2021-06-05 21:04:13,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3365 to 3327. [2021-06-05 21:04:13,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3327 states, 3326 states have (on average 2.493385447985568) internal successors, (8293), 3326 states have internal predecessors, (8293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:13,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3327 states to 3327 states and 8293 transitions. [2021-06-05 21:04:13,345 INFO L78 Accepts]: Start accepts. Automaton has 3327 states and 8293 transitions. Word has length 41 [2021-06-05 21:04:13,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:04:13,346 INFO L482 AbstractCegarLoop]: Abstraction has 3327 states and 8293 transitions. [2021-06-05 21:04:13,346 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:13,346 INFO L276 IsEmpty]: Start isEmpty. Operand 3327 states and 8293 transitions. [2021-06-05 21:04:13,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 21:04:13,349 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:04:13,349 INFO L554 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:04:13,570 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,155 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:04:13,570 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:04:13,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:04:13,571 INFO L82 PathProgramCache]: Analyzing trace with hash 1554389111, now seen corresponding path program 33 times [2021-06-05 21:04:13,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:04:13,571 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509188961] [2021-06-05 21:04:13,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:04:13,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:04:13,665 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 28 proven. 38 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:04:13,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:04:13,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509188961] [2021-06-05 21:04:13,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509188961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:13,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591335109] [2021-06-05 21:04:13,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:04:13,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 21:04:13,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:04:13,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 21:04:13,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:04:13,776 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 29 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:04:13,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591335109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:13,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:04:13,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 11 [2021-06-05 21:04:13,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237989743] [2021-06-05 21:04:13,777 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:04:13,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:04:13,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:04:13,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:04:13,777 INFO L87 Difference]: Start difference. First operand 3327 states and 8293 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:13,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:04:13,974 INFO L93 Difference]: Finished difference Result 3937 states and 9522 transitions. [2021-06-05 21:04:13,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:04:13,975 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 21:04:13,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:04:13,979 INFO L225 Difference]: With dead ends: 3937 [2021-06-05 21:04:13,979 INFO L226 Difference]: Without dead ends: 3909 [2021-06-05 21:04:13,979 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 91.8ms TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:04:13,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3909 states. [2021-06-05 21:04:14,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3909 to 3225. [2021-06-05 21:04:14,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3225 states, 3224 states have (on average 2.507754342431762) internal successors, (8085), 3224 states have internal predecessors, (8085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:14,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3225 states to 3225 states and 8085 transitions. [2021-06-05 21:04:14,048 INFO L78 Accepts]: Start accepts. Automaton has 3225 states and 8085 transitions. Word has length 41 [2021-06-05 21:04:14,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:04:14,048 INFO L482 AbstractCegarLoop]: Abstraction has 3225 states and 8085 transitions. [2021-06-05 21:04:14,048 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:14,048 INFO L276 IsEmpty]: Start isEmpty. Operand 3225 states and 8085 transitions. [2021-06-05 21:04:14,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 21:04:14,051 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:04:14,051 INFO L554 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:04:14,273 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:04:14,273 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:04:14,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:04:14,274 INFO L82 PathProgramCache]: Analyzing trace with hash -692902219, now seen corresponding path program 73 times [2021-06-05 21:04:14,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:04:14,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144577105] [2021-06-05 21:04:14,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:04:14,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:04:14,353 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 29 proven. 37 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:04:14,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:04:14,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144577105] [2021-06-05 21:04:14,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144577105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:14,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560002506] [2021-06-05 21:04:14,353 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:04:14,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:04:14,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 21:04:14,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:04:14,459 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 29 proven. 37 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:04:14,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560002506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:14,459 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:04:14,459 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 21:04:14,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312206237] [2021-06-05 21:04:14,460 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:04:14,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:04:14,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:04:14,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:04:14,460 INFO L87 Difference]: Start difference. First operand 3225 states and 8085 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:14,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:04:14,639 INFO L93 Difference]: Finished difference Result 4305 states and 10371 transitions. [2021-06-05 21:04:14,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:04:14,640 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 21:04:14,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:04:14,644 INFO L225 Difference]: With dead ends: 4305 [2021-06-05 21:04:14,644 INFO L226 Difference]: Without dead ends: 4305 [2021-06-05 21:04:14,644 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 76.5ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:04:14,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4305 states. [2021-06-05 21:04:14,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4305 to 3427. [2021-06-05 21:04:14,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3427 states, 3426 states have (on average 2.538237011091652) internal successors, (8696), 3426 states have internal predecessors, (8696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:14,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3427 states to 3427 states and 8696 transitions. [2021-06-05 21:04:14,694 INFO L78 Accepts]: Start accepts. Automaton has 3427 states and 8696 transitions. Word has length 41 [2021-06-05 21:04:14,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:04:14,694 INFO L482 AbstractCegarLoop]: Abstraction has 3427 states and 8696 transitions. [2021-06-05 21:04:14,694 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:14,694 INFO L276 IsEmpty]: Start isEmpty. Operand 3427 states and 8696 transitions. [2021-06-05 21:04:14,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 21:04:14,697 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:04:14,697 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:04:14,914 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2021-06-05 21:04:14,914 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:04:14,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:04:14,915 INFO L82 PathProgramCache]: Analyzing trace with hash -1463737886, now seen corresponding path program 34 times [2021-06-05 21:04:14,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:04:14,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531192339] [2021-06-05 21:04:14,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:04:14,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:04:14,984 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:04:14,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:04:14,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531192339] [2021-06-05 21:04:14,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531192339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:14,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352425124] [2021-06-05 21:04:14,984 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:04:15,016 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:04:15,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:04:15,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:04:15,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:04:15,085 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:04:15,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352425124] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:15,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:04:15,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 21:04:15,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821948090] [2021-06-05 21:04:15,086 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:04:15,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:04:15,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:04:15,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:04:15,087 INFO L87 Difference]: Start difference. First operand 3427 states and 8696 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:15,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:04:15,400 INFO L93 Difference]: Finished difference Result 4051 states and 9977 transitions. [2021-06-05 21:04:15,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:04:15,400 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 21:04:15,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:04:15,404 INFO L225 Difference]: With dead ends: 4051 [2021-06-05 21:04:15,404 INFO L226 Difference]: Without dead ends: 4047 [2021-06-05 21:04:15,404 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 125.5ms TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:04:15,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4047 states. [2021-06-05 21:04:15,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4047 to 3315. [2021-06-05 21:04:15,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3315 states, 3314 states have (on average 2.55944477972239) internal successors, (8482), 3314 states have internal predecessors, (8482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:15,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3315 states to 3315 states and 8482 transitions. [2021-06-05 21:04:15,449 INFO L78 Accepts]: Start accepts. Automaton has 3315 states and 8482 transitions. Word has length 41 [2021-06-05 21:04:15,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:04:15,449 INFO L482 AbstractCegarLoop]: Abstraction has 3315 states and 8482 transitions. [2021-06-05 21:04:15,449 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:15,449 INFO L276 IsEmpty]: Start isEmpty. Operand 3315 states and 8482 transitions. [2021-06-05 21:04:15,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 21:04:15,452 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:04:15,452 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:04:15,673 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable302,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:04:15,673 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:04:15,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:04:15,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1197933026, now seen corresponding path program 74 times [2021-06-05 21:04:15,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:04:15,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029472161] [2021-06-05 21:04:15,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:04:15,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:04:15,747 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 12 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:04:15,747 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:04:15,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029472161] [2021-06-05 21:04:15,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029472161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:15,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825985951] [2021-06-05 21:04:15,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:04:15,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:04:15,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:04:15,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 21:04:15,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:04:15,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:04:15,844 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:04:15,846 INFO L628 ElimStorePlain]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 21:04:15,846 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-06-05 21:04:15,846 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:04:15,846 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:19, output treesize:1 [2021-06-05 21:04:15,852 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 12 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:04:15,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825985951] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:15,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:04:15,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 21:04:15,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680564368] [2021-06-05 21:04:15,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:04:15,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:04:15,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:04:15,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:04:15,853 INFO L87 Difference]: Start difference. First operand 3315 states and 8482 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:16,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:04:16,003 INFO L93 Difference]: Finished difference Result 3335 states and 8513 transitions. [2021-06-05 21:04:16,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:04:16,003 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 21:04:16,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:04:16,008 INFO L225 Difference]: With dead ends: 3335 [2021-06-05 21:04:16,008 INFO L226 Difference]: Without dead ends: 3315 [2021-06-05 21:04:16,008 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 67.8ms TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:04:16,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3315 states. [2021-06-05 21:04:16,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3315 to 3315. [2021-06-05 21:04:16,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3315 states, 3314 states have (on average 2.5585395292697646) internal successors, (8479), 3314 states have internal predecessors, (8479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:16,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3315 states to 3315 states and 8479 transitions. [2021-06-05 21:04:16,056 INFO L78 Accepts]: Start accepts. Automaton has 3315 states and 8479 transitions. Word has length 41 [2021-06-05 21:04:16,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:04:16,056 INFO L482 AbstractCegarLoop]: Abstraction has 3315 states and 8479 transitions. [2021-06-05 21:04:16,056 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:16,056 INFO L276 IsEmpty]: Start isEmpty. Operand 3315 states and 8479 transitions. [2021-06-05 21:04:16,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 21:04:16,059 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:04:16,059 INFO L554 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:04:16,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable303 [2021-06-05 21:04:16,280 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:04:16,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:04:16,280 INFO L82 PathProgramCache]: Analyzing trace with hash -1045836265, now seen corresponding path program 75 times [2021-06-05 21:04:16,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:04:16,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133495466] [2021-06-05 21:04:16,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:04:16,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:04:16,340 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 27 proven. 39 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:04:16,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:04:16,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133495466] [2021-06-05 21:04:16,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133495466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:16,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023113757] [2021-06-05 21:04:16,341 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 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 [2021-06-05 21:04:16,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 21:04:16,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:04:16,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 21:04:16,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:04:16,443 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 27 proven. 39 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:04:16,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023113757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:16,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:04:16,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 21:04:16,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088809690] [2021-06-05 21:04:16,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:04:16,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:04:16,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:04:16,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:04:16,444 INFO L87 Difference]: Start difference. First operand 3315 states and 8479 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:16,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:04:16,581 INFO L93 Difference]: Finished difference Result 4538 states and 11042 transitions. [2021-06-05 21:04:16,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:04:16,581 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 21:04:16,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:04:16,586 INFO L225 Difference]: With dead ends: 4538 [2021-06-05 21:04:16,587 INFO L226 Difference]: Without dead ends: 4538 [2021-06-05 21:04:16,587 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 52.6ms TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:04:16,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4538 states. [2021-06-05 21:04:16,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4538 to 3547. [2021-06-05 21:04:16,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3547 states, 3546 states have (on average 2.586576424139876) internal successors, (9172), 3546 states have internal predecessors, (9172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:16,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3547 states to 3547 states and 9172 transitions. [2021-06-05 21:04:16,641 INFO L78 Accepts]: Start accepts. Automaton has 3547 states and 9172 transitions. Word has length 41 [2021-06-05 21:04:16,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:04:16,642 INFO L482 AbstractCegarLoop]: Abstraction has 3547 states and 9172 transitions. [2021-06-05 21:04:16,642 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:16,642 INFO L276 IsEmpty]: Start isEmpty. Operand 3547 states and 9172 transitions. [2021-06-05 21:04:16,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 21:04:16,654 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:04:16,654 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:04:16,874 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable304,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:04:16,875 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:04:16,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:04:16,875 INFO L82 PathProgramCache]: Analyzing trace with hash -1283897782, now seen corresponding path program 35 times [2021-06-05 21:04:16,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:04:16,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332086958] [2021-06-05 21:04:16,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:04:16,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:04:16,951 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:04:16,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:04:16,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332086958] [2021-06-05 21:04:16,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332086958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:16,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681505109] [2021-06-05 21:04:16,952 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:04:17,007 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 21:04:17,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:04:17,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:04:17,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:04:17,102 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:04:17,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681505109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:17,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:04:17,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 21:04:17,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53086318] [2021-06-05 21:04:17,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:04:17,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:04:17,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:04:17,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:04:17,103 INFO L87 Difference]: Start difference. First operand 3547 states and 9172 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:17,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:04:17,547 INFO L93 Difference]: Finished difference Result 4055 states and 10165 transitions. [2021-06-05 21:04:17,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:04:17,547 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 21:04:17,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:04:17,552 INFO L225 Difference]: With dead ends: 4055 [2021-06-05 21:04:17,552 INFO L226 Difference]: Without dead ends: 4047 [2021-06-05 21:04:17,552 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 144.4ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:04:17,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4047 states. [2021-06-05 21:04:17,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4047 to 3606. [2021-06-05 21:04:17,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3606 states, 3605 states have (on average 2.582246879334258) internal successors, (9309), 3605 states have internal predecessors, (9309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:17,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3606 states to 3606 states and 9309 transitions. [2021-06-05 21:04:17,605 INFO L78 Accepts]: Start accepts. Automaton has 3606 states and 9309 transitions. Word has length 41 [2021-06-05 21:04:17,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:04:17,605 INFO L482 AbstractCegarLoop]: Abstraction has 3606 states and 9309 transitions. [2021-06-05 21:04:17,605 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:17,605 INFO L276 IsEmpty]: Start isEmpty. Operand 3606 states and 9309 transitions. [2021-06-05 21:04:17,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 21:04:17,608 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:04:17,608 INFO L554 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:04:17,829 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable305 [2021-06-05 21:04:17,830 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:04:17,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:04:17,830 INFO L82 PathProgramCache]: Analyzing trace with hash 1457372657, now seen corresponding path program 76 times [2021-06-05 21:04:17,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:04:17,830 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679121690] [2021-06-05 21:04:17,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:04:17,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:04:17,872 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 37 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:04:17,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:04:17,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679121690] [2021-06-05 21:04:17,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679121690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:17,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963481124] [2021-06-05 21:04:17,873 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 [2021-06-05 21:04:17,898 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:04:17,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:04:17,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 21:04:17,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:04:17,974 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 37 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:04:17,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963481124] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:17,975 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:04:17,975 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 21:04:17,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142361617] [2021-06-05 21:04:17,975 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:04:17,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:04:17,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:04:17,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:04:17,975 INFO L87 Difference]: Start difference. First operand 3606 states and 9309 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:18,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:04:18,075 INFO L93 Difference]: Finished difference Result 4522 states and 10995 transitions. [2021-06-05 21:04:18,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:04:18,075 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 21:04:18,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:04:18,079 INFO L225 Difference]: With dead ends: 4522 [2021-06-05 21:04:18,079 INFO L226 Difference]: Without dead ends: 4519 [2021-06-05 21:04:18,079 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 39.5ms TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:04:18,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4519 states. [2021-06-05 21:04:18,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4519 to 3605. [2021-06-05 21:04:18,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3605 states, 3604 states have (on average 2.5812985571587124) internal successors, (9303), 3604 states have internal predecessors, (9303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:18,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3605 states to 3605 states and 9303 transitions. [2021-06-05 21:04:18,120 INFO L78 Accepts]: Start accepts. Automaton has 3605 states and 9303 transitions. Word has length 41 [2021-06-05 21:04:18,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:04:18,120 INFO L482 AbstractCegarLoop]: Abstraction has 3605 states and 9303 transitions. [2021-06-05 21:04:18,120 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:18,120 INFO L276 IsEmpty]: Start isEmpty. Operand 3605 states and 9303 transitions. [2021-06-05 21:04:18,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 21:04:18,122 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:04:18,122 INFO L554 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:04:18,322 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable306,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:04:18,322 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:04:18,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:04:18,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1664435223, now seen corresponding path program 77 times [2021-06-05 21:04:18,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:04:18,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392340706] [2021-06-05 21:04:18,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:04:18,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:04:18,388 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 32 proven. 33 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:04:18,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:04:18,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392340706] [2021-06-05 21:04:18,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392340706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:18,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882036951] [2021-06-05 21:04:18,388 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 [2021-06-05 21:04:18,449 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 21:04:18,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:04:18,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 21:04:18,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:04:18,529 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 35 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:04:18,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882036951] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:18,529 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:04:18,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 10 [2021-06-05 21:04:18,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152614199] [2021-06-05 21:04:18,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:04:18,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:04:18,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:04:18,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:04:18,530 INFO L87 Difference]: Start difference. First operand 3605 states and 9303 transitions. Second operand has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:18,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:04:18,651 INFO L93 Difference]: Finished difference Result 4564 states and 11216 transitions. [2021-06-05 21:04:18,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:04:18,652 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 21:04:18,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:04:18,656 INFO L225 Difference]: With dead ends: 4564 [2021-06-05 21:04:18,656 INFO L226 Difference]: Without dead ends: 4552 [2021-06-05 21:04:18,656 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 67.8ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:04:18,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4552 states. [2021-06-05 21:04:18,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4552 to 3605. [2021-06-05 21:04:18,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3605 states, 3604 states have (on average 2.5804661487236404) internal successors, (9300), 3604 states have internal predecessors, (9300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:18,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3605 states to 3605 states and 9300 transitions. [2021-06-05 21:04:18,695 INFO L78 Accepts]: Start accepts. Automaton has 3605 states and 9300 transitions. Word has length 41 [2021-06-05 21:04:18,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:04:18,695 INFO L482 AbstractCegarLoop]: Abstraction has 3605 states and 9300 transitions. [2021-06-05 21:04:18,695 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:18,695 INFO L276 IsEmpty]: Start isEmpty. Operand 3605 states and 9300 transitions. [2021-06-05 21:04:18,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 21:04:18,697 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:04:18,697 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:04:18,898 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable308,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:04:18,898 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:04:18,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:04:18,898 INFO L82 PathProgramCache]: Analyzing trace with hash 216435210, now seen corresponding path program 78 times [2021-06-05 21:04:18,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:04:18,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806173214] [2021-06-05 21:04:18,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:04:18,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:04:18,961 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 13 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:04:18,961 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:04:18,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806173214] [2021-06-05 21:04:18,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806173214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:18,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083003678] [2021-06-05 21:04:18,962 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 [2021-06-05 21:04:18,987 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 21:04:18,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:04:18,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:04:18,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:04:19,057 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:04:19,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083003678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:19,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:04:19,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 21:04:19,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610653260] [2021-06-05 21:04:19,058 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:04:19,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:04:19,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:04:19,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:04:19,058 INFO L87 Difference]: Start difference. First operand 3605 states and 9300 transitions. Second operand has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:19,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:04:19,343 INFO L93 Difference]: Finished difference Result 3907 states and 9798 transitions. [2021-06-05 21:04:19,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:04:19,343 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 21:04:19,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:04:19,347 INFO L225 Difference]: With dead ends: 3907 [2021-06-05 21:04:19,347 INFO L226 Difference]: Without dead ends: 3810 [2021-06-05 21:04:19,347 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 81.2ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:04:19,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3810 states. [2021-06-05 21:04:19,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3810 to 3511. [2021-06-05 21:04:19,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3511 states, 3510 states have (on average 2.5866096866096866) internal successors, (9079), 3510 states have internal predecessors, (9079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:19,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3511 states to 3511 states and 9079 transitions. [2021-06-05 21:04:19,382 INFO L78 Accepts]: Start accepts. Automaton has 3511 states and 9079 transitions. Word has length 41 [2021-06-05 21:04:19,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:04:19,382 INFO L482 AbstractCegarLoop]: Abstraction has 3511 states and 9079 transitions. [2021-06-05 21:04:19,382 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) [2021-06-05 21:04:19,382 INFO L276 IsEmpty]: Start isEmpty. Operand 3511 states and 9079 transitions. [2021-06-05 21:04:19,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 21:04:19,384 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:04:19,384 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:04:19,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable311 [2021-06-05 21:04:19,585 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:04:19,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:04:19,585 INFO L82 PathProgramCache]: Analyzing trace with hash -397100970, now seen corresponding path program 79 times [2021-06-05 21:04:19,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:04:19,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439073434] [2021-06-05 21:04:19,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:04:19,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:04:19,650 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 52 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:04:19,650 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:04:19,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439073434] [2021-06-05 21:04:19,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439073434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:19,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11358369] [2021-06-05 21:04:19,650 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 [2021-06-05 21:04:19,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:04:19,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:04:19,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:04:19,756 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 53 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:04:19,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11358369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:19,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:04:19,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 21:04:19,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725493563] [2021-06-05 21:04:19,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:04:19,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:04:19,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:04:19,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:04:19,757 INFO L87 Difference]: Start difference. First operand 3511 states and 9079 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:19,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:04:19,977 INFO L93 Difference]: Finished difference Result 3950 states and 9921 transitions. [2021-06-05 21:04:19,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:04:19,977 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 21:04:19,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:04:19,982 INFO L225 Difference]: With dead ends: 3950 [2021-06-05 21:04:19,982 INFO L226 Difference]: Without dead ends: 3938 [2021-06-05 21:04:19,982 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 88.6ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:04:19,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3938 states. [2021-06-05 21:04:20,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3938 to 3513. [2021-06-05 21:04:20,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3513 states, 3512 states have (on average 2.5865603644646926) internal successors, (9084), 3512 states have internal predecessors, (9084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:20,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3513 states to 3513 states and 9084 transitions. [2021-06-05 21:04:20,022 INFO L78 Accepts]: Start accepts. Automaton has 3513 states and 9084 transitions. Word has length 41 [2021-06-05 21:04:20,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:04:20,022 INFO L482 AbstractCegarLoop]: Abstraction has 3513 states and 9084 transitions. [2021-06-05 21:04:20,022 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:20,022 INFO L276 IsEmpty]: Start isEmpty. Operand 3513 states and 9084 transitions. [2021-06-05 21:04:20,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 21:04:20,024 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:04:20,024 INFO L554 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:04:20,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable312 [2021-06-05 21:04:20,224 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:04:20,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:04:20,225 INFO L82 PathProgramCache]: Analyzing trace with hash -554400457, now seen corresponding path program 36 times [2021-06-05 21:04:20,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:04:20,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866211927] [2021-06-05 21:04:20,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:04:20,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:04:20,269 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 36 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:04:20,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:04:20,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866211927] [2021-06-05 21:04:20,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866211927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:20,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539349736] [2021-06-05 21:04:20,269 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:04:20,294 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 21:04:20,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:04:20,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 21:04:20,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:04:20,380 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 37 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:04:20,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539349736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:20,381 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:04:20,381 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12] total 13 [2021-06-05 21:04:20,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695306919] [2021-06-05 21:04:20,381 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:04:20,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:04:20,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:04:20,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:04:20,381 INFO L87 Difference]: Start difference. First operand 3513 states and 9084 transitions. Second operand has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 13 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:20,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:04:20,550 INFO L93 Difference]: Finished difference Result 4278 states and 10675 transitions. [2021-06-05 21:04:20,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:04:20,550 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 13 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 21:04:20,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:04:20,555 INFO L225 Difference]: With dead ends: 4278 [2021-06-05 21:04:20,555 INFO L226 Difference]: Without dead ends: 4268 [2021-06-05 21:04:20,555 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 83.9ms TimeCoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:04:20,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4268 states. [2021-06-05 21:04:20,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4268 to 3755. [2021-06-05 21:04:20,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3755 states, 3754 states have (on average 2.587906233351092) internal successors, (9715), 3754 states have internal predecessors, (9715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:20,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3755 states to 3755 states and 9715 transitions. [2021-06-05 21:04:20,600 INFO L78 Accepts]: Start accepts. Automaton has 3755 states and 9715 transitions. Word has length 41 [2021-06-05 21:04:20,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:04:20,600 INFO L482 AbstractCegarLoop]: Abstraction has 3755 states and 9715 transitions. [2021-06-05 21:04:20,600 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 13 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:20,600 INFO L276 IsEmpty]: Start isEmpty. Operand 3755 states and 9715 transitions. [2021-06-05 21:04:20,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 21:04:20,603 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:04:20,603 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:04:20,803 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable313,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:04:20,803 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:04:20,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:04:20,803 INFO L82 PathProgramCache]: Analyzing trace with hash 1744816364, now seen corresponding path program 80 times [2021-06-05 21:04:20,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:04:20,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88098721] [2021-06-05 21:04:20,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:04:20,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:04:20,860 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 53 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:04:20,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:04:20,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88098721] [2021-06-05 21:04:20,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88098721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:20,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682775690] [2021-06-05 21:04:20,860 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:04:20,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:04:20,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:04:20,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 21:04:20,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:04:20,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:04:20,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2021-06-05 21:04:20,952 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:04:20,954 INFO L628 ElimStorePlain]: treesize reduction 20, result has 4.8 percent of original size [2021-06-05 21:04:20,954 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-06-05 21:04:20,955 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:04:20,955 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:1 [2021-06-05 21:04:20,961 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 14 proven. 50 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:04:20,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682775690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:20,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:04:20,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 21:04:20,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647665946] [2021-06-05 21:04:20,962 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:04:20,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:04:20,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:04:20,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:04:20,962 INFO L87 Difference]: Start difference. First operand 3755 states and 9715 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:21,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:04:21,355 INFO L93 Difference]: Finished difference Result 5015 states and 12296 transitions. [2021-06-05 21:04:21,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:04:21,355 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 21:04:21,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:04:21,360 INFO L225 Difference]: With dead ends: 5015 [2021-06-05 21:04:21,360 INFO L226 Difference]: Without dead ends: 4961 [2021-06-05 21:04:21,360 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 149.7ms TimeCoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:04:21,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4961 states. [2021-06-05 21:04:21,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4961 to 3838. [2021-06-05 21:04:21,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3838 states, 3837 states have (on average 2.5882199635131613) internal successors, (9931), 3837 states have internal predecessors, (9931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:21,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3838 states to 3838 states and 9931 transitions. [2021-06-05 21:04:21,401 INFO L78 Accepts]: Start accepts. Automaton has 3838 states and 9931 transitions. Word has length 41 [2021-06-05 21:04:21,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:04:21,401 INFO L482 AbstractCegarLoop]: Abstraction has 3838 states and 9931 transitions. [2021-06-05 21:04:21,401 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:21,401 INFO L276 IsEmpty]: Start isEmpty. Operand 3838 states and 9931 transitions. [2021-06-05 21:04:21,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 21:04:21,403 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:04:21,403 INFO L554 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:04:21,603 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable316 [2021-06-05 21:04:21,603 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:04:21,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:04:21,604 INFO L82 PathProgramCache]: Analyzing trace with hash -1017591823, now seen corresponding path program 81 times [2021-06-05 21:04:21,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:04:21,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173519128] [2021-06-05 21:04:21,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:04:21,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:04:21,672 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 24 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:04:21,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:04:21,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173519128] [2021-06-05 21:04:21,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173519128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:21,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132056328] [2021-06-05 21:04:21,672 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:04:21,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 21:04:21,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:04:21,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 21:04:21,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:04:21,786 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 24 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:04:21,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132056328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:21,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:04:21,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 21:04:21,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465212867] [2021-06-05 21:04:21,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:04:21,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:04:21,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:04:21,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:04:21,787 INFO L87 Difference]: Start difference. First operand 3838 states and 9931 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:21,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:04:21,901 INFO L93 Difference]: Finished difference Result 4722 states and 11676 transitions. [2021-06-05 21:04:21,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:04:21,901 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 21:04:21,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:04:21,920 INFO L225 Difference]: With dead ends: 4722 [2021-06-05 21:04:21,920 INFO L226 Difference]: Without dead ends: 4704 [2021-06-05 21:04:21,920 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 64.7ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:04:21,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4704 states. [2021-06-05 21:04:21,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4704 to 3928. [2021-06-05 21:04:21,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3928 states, 3927 states have (on average 2.6002037178507766) internal successors, (10211), 3927 states have internal predecessors, (10211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:21,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3928 states to 3928 states and 10211 transitions. [2021-06-05 21:04:21,962 INFO L78 Accepts]: Start accepts. Automaton has 3928 states and 10211 transitions. Word has length 41 [2021-06-05 21:04:21,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:04:21,962 INFO L482 AbstractCegarLoop]: Abstraction has 3928 states and 10211 transitions. [2021-06-05 21:04:21,962 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:21,963 INFO L276 IsEmpty]: Start isEmpty. Operand 3928 states and 10211 transitions. [2021-06-05 21:04:21,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 21:04:21,965 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:04:21,965 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:04:22,165 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable317,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:04:22,165 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:04:22,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:04:22,166 INFO L82 PathProgramCache]: Analyzing trace with hash 1899652898, now seen corresponding path program 82 times [2021-06-05 21:04:22,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:04:22,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124467659] [2021-06-05 21:04:22,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:04:22,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:04:22,233 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 53 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:04:22,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:04:22,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124467659] [2021-06-05 21:04:22,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124467659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:22,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617289665] [2021-06-05 21:04:22,233 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:04:22,256 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:04:22,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:04:22,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 21:04:22,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:04:22,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:04:22,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2021-06-05 21:04:22,374 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:04:22,376 INFO L628 ElimStorePlain]: treesize reduction 20, result has 4.8 percent of original size [2021-06-05 21:04:22,376 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-06-05 21:04:22,376 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:04:22,376 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:1 [2021-06-05 21:04:22,383 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 14 proven. 50 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:04:22,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617289665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:22,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:04:22,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 21:04:22,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839317983] [2021-06-05 21:04:22,384 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:04:22,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:04:22,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:04:22,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:04:22,384 INFO L87 Difference]: Start difference. First operand 3928 states and 10211 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:22,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:04:22,982 INFO L93 Difference]: Finished difference Result 7135 states and 16888 transitions. [2021-06-05 21:04:22,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 21:04:22,983 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 21:04:22,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:04:22,990 INFO L225 Difference]: With dead ends: 7135 [2021-06-05 21:04:22,990 INFO L226 Difference]: Without dead ends: 6955 [2021-06-05 21:04:22,990 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 311.0ms TimeCoverageRelationStatistics Valid=213, Invalid=1269, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 21:04:22,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6955 states. [2021-06-05 21:04:23,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6955 to 4145. [2021-06-05 21:04:23,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4145 states, 4144 states have (on average 2.5921814671814674) internal successors, (10742), 4144 states have internal predecessors, (10742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:23,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4145 states to 4145 states and 10742 transitions. [2021-06-05 21:04:23,048 INFO L78 Accepts]: Start accepts. Automaton has 4145 states and 10742 transitions. Word has length 41 [2021-06-05 21:04:23,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:04:23,048 INFO L482 AbstractCegarLoop]: Abstraction has 4145 states and 10742 transitions. [2021-06-05 21:04:23,048 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:23,048 INFO L276 IsEmpty]: Start isEmpty. Operand 4145 states and 10742 transitions. [2021-06-05 21:04:23,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 21:04:23,051 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:04:23,051 INFO L554 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:04:23,251 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable321 [2021-06-05 21:04:23,252 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:04:23,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:04:23,252 INFO L82 PathProgramCache]: Analyzing trace with hash -2008711721, now seen corresponding path program 83 times [2021-06-05 21:04:23,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:04:23,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932679872] [2021-06-05 21:04:23,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:04:23,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:04:23,312 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 22 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:04:23,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:04:23,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932679872] [2021-06-05 21:04:23,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932679872] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:23,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045903315] [2021-06-05 21:04:23,312 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:04:23,336 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 21:04:23,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:04:23,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 21:04:23,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:04:23,409 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 22 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:04:23,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045903315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:23,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:04:23,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 12 [2021-06-05 21:04:23,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036386845] [2021-06-05 21:04:23,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:04:23,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:04:23,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:04:23,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:04:23,410 INFO L87 Difference]: Start difference. First operand 4145 states and 10742 transitions. Second operand has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 12 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:23,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:04:23,568 INFO L93 Difference]: Finished difference Result 5126 states and 12564 transitions. [2021-06-05 21:04:23,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:04:23,568 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 12 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 21:04:23,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:04:23,573 INFO L225 Difference]: With dead ends: 5126 [2021-06-05 21:04:23,573 INFO L226 Difference]: Without dead ends: 5099 [2021-06-05 21:04:23,573 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 87.9ms TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:04:23,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5099 states. [2021-06-05 21:04:23,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5099 to 4145. [2021-06-05 21:04:23,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4145 states, 4144 states have (on average 2.591457528957529) internal successors, (10739), 4144 states have internal predecessors, (10739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:23,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4145 states to 4145 states and 10739 transitions. [2021-06-05 21:04:23,618 INFO L78 Accepts]: Start accepts. Automaton has 4145 states and 10739 transitions. Word has length 41 [2021-06-05 21:04:23,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:04:23,618 INFO L482 AbstractCegarLoop]: Abstraction has 4145 states and 10739 transitions. [2021-06-05 21:04:23,618 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 12 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:23,618 INFO L276 IsEmpty]: Start isEmpty. Operand 4145 states and 10739 transitions. [2021-06-05 21:04:23,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 21:04:23,621 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:04:23,621 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:04:23,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable322 [2021-06-05 21:04:23,822 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:04:23,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:04:23,822 INFO L82 PathProgramCache]: Analyzing trace with hash 1839961388, now seen corresponding path program 84 times [2021-06-05 21:04:23,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:04:23,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8425197] [2021-06-05 21:04:23,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:04:23,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:04:23,897 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 53 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:04:23,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:04:23,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8425197] [2021-06-05 21:04:23,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8425197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:23,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232329639] [2021-06-05 21:04:23,898 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:04:23,923 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 21:04:23,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:04:23,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:04:23,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:04:23,979 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 54 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:04:23,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232329639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:23,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:04:23,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 21:04:23,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521193375] [2021-06-05 21:04:23,980 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:04:23,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:04:23,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:04:23,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:04:23,980 INFO L87 Difference]: Start difference. First operand 4145 states and 10739 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:24,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:04:24,849 INFO L93 Difference]: Finished difference Result 8258 states and 19418 transitions. [2021-06-05 21:04:24,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 21:04:24,850 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 21:04:24,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:04:24,858 INFO L225 Difference]: With dead ends: 8258 [2021-06-05 21:04:24,858 INFO L226 Difference]: Without dead ends: 7982 [2021-06-05 21:04:24,859 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1320 ImplicationChecksByTransitivity, 580.8ms TimeCoverageRelationStatistics Valid=483, Invalid=3423, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 21:04:24,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7982 states. [2021-06-05 21:04:24,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7982 to 4501. [2021-06-05 21:04:24,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4501 states, 4500 states have (on average 2.5802222222222224) internal successors, (11611), 4500 states have internal predecessors, (11611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:24,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4501 states to 4501 states and 11611 transitions. [2021-06-05 21:04:24,927 INFO L78 Accepts]: Start accepts. Automaton has 4501 states and 11611 transitions. Word has length 41 [2021-06-05 21:04:24,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:04:24,927 INFO L482 AbstractCegarLoop]: Abstraction has 4501 states and 11611 transitions. [2021-06-05 21:04:24,927 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:24,927 INFO L276 IsEmpty]: Start isEmpty. Operand 4501 states and 11611 transitions. [2021-06-05 21:04:24,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 21:04:24,930 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:04:24,930 INFO L554 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:04:25,131 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable327 [2021-06-05 21:04:25,131 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:04:25,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:04:25,131 INFO L82 PathProgramCache]: Analyzing trace with hash -561433039, now seen corresponding path program 85 times [2021-06-05 21:04:25,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:04:25,131 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359500062] [2021-06-05 21:04:25,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:04:25,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:04:25,201 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 26 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:04:25,201 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:04:25,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359500062] [2021-06-05 21:04:25,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359500062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:25,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350264770] [2021-06-05 21:04:25,201 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:04:25,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:04:25,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 21:04:25,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:04:25,338 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 26 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:04:25,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350264770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:25,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:04:25,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 21:04:25,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203175169] [2021-06-05 21:04:25,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:04:25,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:04:25,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:04:25,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:04:25,339 INFO L87 Difference]: Start difference. First operand 4501 states and 11611 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:25,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:04:25,496 INFO L93 Difference]: Finished difference Result 5578 states and 13597 transitions. [2021-06-05 21:04:25,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:04:25,496 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 21:04:25,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:04:25,501 INFO L225 Difference]: With dead ends: 5578 [2021-06-05 21:04:25,502 INFO L226 Difference]: Without dead ends: 5542 [2021-06-05 21:04:25,502 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 91.8ms TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:04:25,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5542 states. [2021-06-05 21:04:25,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5542 to 4501. [2021-06-05 21:04:25,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4501 states, 4500 states have (on average 2.5795555555555554) internal successors, (11608), 4500 states have internal predecessors, (11608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:25,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4501 states to 4501 states and 11608 transitions. [2021-06-05 21:04:25,553 INFO L78 Accepts]: Start accepts. Automaton has 4501 states and 11608 transitions. Word has length 41 [2021-06-05 21:04:25,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:04:25,553 INFO L482 AbstractCegarLoop]: Abstraction has 4501 states and 11608 transitions. [2021-06-05 21:04:25,553 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:25,553 INFO L276 IsEmpty]: Start isEmpty. Operand 4501 states and 11608 transitions. [2021-06-05 21:04:25,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 21:04:25,556 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:04:25,556 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:04:25,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable328,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:04:25,756 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:04:25,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:04:25,756 INFO L82 PathProgramCache]: Analyzing trace with hash 1686647522, now seen corresponding path program 86 times [2021-06-05 21:04:25,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:04:25,756 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104929480] [2021-06-05 21:04:25,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:04:25,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:04:25,837 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:04:25,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:04:25,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104929480] [2021-06-05 21:04:25,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104929480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:25,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305359099] [2021-06-05 21:04:25,837 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:04:25,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:04:25,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:04:25,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:04:25,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:04:25,916 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:04:25,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305359099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:25,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:04:25,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:04:25,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500350187] [2021-06-05 21:04:25,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:04:25,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:04:25,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:04:25,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:04:25,917 INFO L87 Difference]: Start difference. First operand 4501 states and 11608 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:26,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:04:26,264 INFO L93 Difference]: Finished difference Result 5731 states and 13840 transitions. [2021-06-05 21:04:26,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:04:26,265 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 21:04:26,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:04:26,270 INFO L225 Difference]: With dead ends: 5731 [2021-06-05 21:04:26,270 INFO L226 Difference]: Without dead ends: 5353 [2021-06-05 21:04:26,270 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 205.7ms TimeCoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:04:26,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5353 states. [2021-06-05 21:04:26,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5353 to 3673. [2021-06-05 21:04:26,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3673 states, 3672 states have (on average 2.6173747276688455) internal successors, (9611), 3672 states have internal predecessors, (9611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:26,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3673 states to 3673 states and 9611 transitions. [2021-06-05 21:04:26,315 INFO L78 Accepts]: Start accepts. Automaton has 3673 states and 9611 transitions. Word has length 41 [2021-06-05 21:04:26,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:04:26,315 INFO L482 AbstractCegarLoop]: Abstraction has 3673 states and 9611 transitions. [2021-06-05 21:04:26,315 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:26,315 INFO L276 IsEmpty]: Start isEmpty. Operand 3673 states and 9611 transitions. [2021-06-05 21:04:26,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 21:04:26,317 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:04:26,317 INFO L554 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:04:26,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable334 [2021-06-05 21:04:26,518 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:04:26,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:04:26,518 INFO L82 PathProgramCache]: Analyzing trace with hash 826705595, now seen corresponding path program 37 times [2021-06-05 21:04:26,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:04:26,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588290259] [2021-06-05 21:04:26,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:04:26,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:04:26,564 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 48 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:04:26,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:04:26,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588290259] [2021-06-05 21:04:26,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588290259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:26,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040408912] [2021-06-05 21:04:26,564 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:04:26,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:04:26,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:04:26,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:04:26,673 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 49 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:04:26,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040408912] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:26,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:04:26,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 10 [2021-06-05 21:04:26,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098302803] [2021-06-05 21:04:26,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:04:26,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:04:26,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:04:26,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:04:26,674 INFO L87 Difference]: Start difference. First operand 3673 states and 9611 transitions. Second operand has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:26,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:04:26,933 INFO L93 Difference]: Finished difference Result 4473 states and 11190 transitions. [2021-06-05 21:04:26,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:04:26,933 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 21:04:26,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:04:26,937 INFO L225 Difference]: With dead ends: 4473 [2021-06-05 21:04:26,937 INFO L226 Difference]: Without dead ends: 4473 [2021-06-05 21:04:26,937 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 131.0ms TimeCoverageRelationStatistics Valid=138, Invalid=204, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:04:26,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4473 states. [2021-06-05 21:04:26,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4473 to 3628. [2021-06-05 21:04:26,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3628 states, 3627 states have (on average 2.626413013509788) internal successors, (9526), 3627 states have internal predecessors, (9526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:26,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3628 states to 3628 states and 9526 transitions. [2021-06-05 21:04:26,976 INFO L78 Accepts]: Start accepts. Automaton has 3628 states and 9526 transitions. Word has length 41 [2021-06-05 21:04:26,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:04:26,976 INFO L482 AbstractCegarLoop]: Abstraction has 3628 states and 9526 transitions. [2021-06-05 21:04:26,977 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:26,977 INFO L276 IsEmpty]: Start isEmpty. Operand 3628 states and 9526 transitions. [2021-06-05 21:04:26,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 21:04:26,979 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:04:26,979 INFO L554 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:04:27,179 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable335,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:04:27,179 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:04:27,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:04:27,179 INFO L82 PathProgramCache]: Analyzing trace with hash -1858902121, now seen corresponding path program 87 times [2021-06-05 21:04:27,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:04:27,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259477084] [2021-06-05 21:04:27,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:04:27,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:04:27,257 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 37 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:04:27,257 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:04:27,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259477084] [2021-06-05 21:04:27,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259477084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:27,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877776791] [2021-06-05 21:04:27,258 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:04:27,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:04:27,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:04:27,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 21:04:27,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:04:27,344 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 37 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:04:27,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877776791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:27,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:04:27,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-05 21:04:27,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113601222] [2021-06-05 21:04:27,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:04:27,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:04:27,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:04:27,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:04:27,345 INFO L87 Difference]: Start difference. First operand 3628 states and 9526 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:27,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:04:27,511 INFO L93 Difference]: Finished difference Result 4326 states and 10808 transitions. [2021-06-05 21:04:27,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:04:27,511 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 21:04:27,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:04:27,515 INFO L225 Difference]: With dead ends: 4326 [2021-06-05 21:04:27,515 INFO L226 Difference]: Without dead ends: 4279 [2021-06-05 21:04:27,515 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 110.4ms TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:04:27,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4279 states. [2021-06-05 21:04:27,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4279 to 3637. [2021-06-05 21:04:27,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3637 states, 3636 states have (on average 2.623762376237624) internal successors, (9540), 3636 states have internal predecessors, (9540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:27,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3637 states to 3637 states and 9540 transitions. [2021-06-05 21:04:27,554 INFO L78 Accepts]: Start accepts. Automaton has 3637 states and 9540 transitions. Word has length 41 [2021-06-05 21:04:27,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:04:27,554 INFO L482 AbstractCegarLoop]: Abstraction has 3637 states and 9540 transitions. [2021-06-05 21:04:27,554 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:27,554 INFO L276 IsEmpty]: Start isEmpty. Operand 3637 states and 9540 transitions. [2021-06-05 21:04:27,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 21:04:27,557 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:04:27,557 INFO L554 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:04:27,757 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable338 [2021-06-05 21:04:27,757 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:04:27,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:04:27,757 INFO L82 PathProgramCache]: Analyzing trace with hash 714915480, now seen corresponding path program 88 times [2021-06-05 21:04:27,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:04:27,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657695313] [2021-06-05 21:04:27,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:04:27,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:04:27,803 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:04:27,803 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:04:27,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657695313] [2021-06-05 21:04:27,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657695313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:27,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508364080] [2021-06-05 21:04:27,803 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:04:27,828 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:04:27,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:04:27,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:04:27,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:04:28,037 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 35 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:04:28,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508364080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:28,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:04:28,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 13] total 19 [2021-06-05 21:04:28,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648473280] [2021-06-05 21:04:28,037 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 21:04:28,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:04:28,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 21:04:28,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:04:28,038 INFO L87 Difference]: Start difference. First operand 3637 states and 9540 transitions. Second operand has 20 states, 20 states have (on average 4.35) internal successors, (87), 19 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:28,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:04:28,986 INFO L93 Difference]: Finished difference Result 5488 states and 13282 transitions. [2021-06-05 21:04:28,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 21:04:28,986 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.35) internal successors, (87), 19 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 21:04:28,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:04:28,991 INFO L225 Difference]: With dead ends: 5488 [2021-06-05 21:04:28,991 INFO L226 Difference]: Without dead ends: 5450 [2021-06-05 21:04:28,991 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 513.6ms TimeCoverageRelationStatistics Valid=473, Invalid=1783, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 21:04:28,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5450 states. [2021-06-05 21:04:29,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5450 to 4188. [2021-06-05 21:04:29,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4188 states, 4187 states have (on average 2.571053260090757) internal successors, (10765), 4187 states have internal predecessors, (10765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:29,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4188 states to 4188 states and 10765 transitions. [2021-06-05 21:04:29,039 INFO L78 Accepts]: Start accepts. Automaton has 4188 states and 10765 transitions. Word has length 44 [2021-06-05 21:04:29,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:04:29,039 INFO L482 AbstractCegarLoop]: Abstraction has 4188 states and 10765 transitions. [2021-06-05 21:04:29,039 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 4.35) internal successors, (87), 19 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:29,039 INFO L276 IsEmpty]: Start isEmpty. Operand 4188 states and 10765 transitions. [2021-06-05 21:04:29,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 21:04:29,042 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:04:29,042 INFO L554 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:04:29,242 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable345 [2021-06-05 21:04:29,242 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:04:29,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:04:29,242 INFO L82 PathProgramCache]: Analyzing trace with hash 667584024, now seen corresponding path program 89 times [2021-06-05 21:04:29,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:04:29,242 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151717185] [2021-06-05 21:04:29,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:04:29,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:04:29,302 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 21:04:29,302 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:04:29,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151717185] [2021-06-05 21:04:29,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151717185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:29,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664701335] [2021-06-05 21:04:29,302 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:04:29,348 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 21:04:29,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:04:29,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:04:29,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:04:29,403 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 21:04:29,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664701335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:29,403 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:04:29,403 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 21:04:29,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163038780] [2021-06-05 21:04:29,403 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:04:29,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:04:29,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:04:29,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:04:29,404 INFO L87 Difference]: Start difference. First operand 4188 states and 10765 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:29,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:04:29,586 INFO L93 Difference]: Finished difference Result 4818 states and 11987 transitions. [2021-06-05 21:04:29,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 21:04:29,586 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 21:04:29,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:04:29,591 INFO L225 Difference]: With dead ends: 4818 [2021-06-05 21:04:29,591 INFO L226 Difference]: Without dead ends: 4783 [2021-06-05 21:04:29,591 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.8ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:04:29,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4783 states. [2021-06-05 21:04:29,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4783 to 4206. [2021-06-05 21:04:29,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4206 states, 4205 states have (on average 2.5690844233055885) internal successors, (10803), 4205 states have internal predecessors, (10803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:29,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4206 states to 4206 states and 10803 transitions. [2021-06-05 21:04:29,633 INFO L78 Accepts]: Start accepts. Automaton has 4206 states and 10803 transitions. Word has length 44 [2021-06-05 21:04:29,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:04:29,633 INFO L482 AbstractCegarLoop]: Abstraction has 4206 states and 10803 transitions. [2021-06-05 21:04:29,633 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) [2021-06-05 21:04:29,633 INFO L276 IsEmpty]: Start isEmpty. Operand 4206 states and 10803 transitions. [2021-06-05 21:04:29,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 21:04:29,636 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:04:29,636 INFO L554 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:04:29,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable346,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:04:29,836 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:04:29,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:04:29,837 INFO L82 PathProgramCache]: Analyzing trace with hash -19269454, now seen corresponding path program 90 times [2021-06-05 21:04:29,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:04:29,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102612851] [2021-06-05 21:04:29,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:04:29,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:04:29,880 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 21:04:29,880 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:04:29,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102612851] [2021-06-05 21:04:29,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102612851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:29,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803827074] [2021-06-05 21:04:29,880 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:04:29,906 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 21:04:29,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:04:29,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:04:29,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:04:30,029 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 19 proven. 60 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:04:30,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803827074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:30,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:04:30,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 21:04:30,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025523775] [2021-06-05 21:04:30,029 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:04:30,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:04:30,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:04:30,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:04:30,030 INFO L87 Difference]: Start difference. First operand 4206 states and 10803 transitions. Second operand has 15 states, 15 states have (on average 5.6) internal successors, (84), 14 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:30,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:04:30,628 INFO L93 Difference]: Finished difference Result 6446 states and 15040 transitions. [2021-06-05 21:04:30,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 21:04:30,628 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.6) internal successors, (84), 14 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 21:04:30,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:04:30,636 INFO L225 Difference]: With dead ends: 6446 [2021-06-05 21:04:30,636 INFO L226 Difference]: Without dead ends: 6383 [2021-06-05 21:04:30,636 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 266.8ms TimeCoverageRelationStatistics Valid=207, Invalid=849, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 21:04:30,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6383 states. [2021-06-05 21:04:30,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6383 to 4276. [2021-06-05 21:04:30,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4276 states, 4275 states have (on average 2.56046783625731) internal successors, (10946), 4275 states have internal predecessors, (10946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:30,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4276 states to 4276 states and 10946 transitions. [2021-06-05 21:04:30,698 INFO L78 Accepts]: Start accepts. Automaton has 4276 states and 10946 transitions. Word has length 44 [2021-06-05 21:04:30,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:04:30,698 INFO L482 AbstractCegarLoop]: Abstraction has 4276 states and 10946 transitions. [2021-06-05 21:04:30,698 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.6) internal successors, (84), 14 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:30,698 INFO L276 IsEmpty]: Start isEmpty. Operand 4276 states and 10946 transitions. [2021-06-05 21:04:30,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 21:04:30,702 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:04:30,702 INFO L554 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:04:30,902 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable347 [2021-06-05 21:04:30,902 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:04:30,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:04:30,902 INFO L82 PathProgramCache]: Analyzing trace with hash -847034408, now seen corresponding path program 91 times [2021-06-05 21:04:30,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:04:30,903 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494525158] [2021-06-05 21:04:30,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:04:30,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:04:30,946 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 21:04:30,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:04:30,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494525158] [2021-06-05 21:04:30,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494525158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:30,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356114728] [2021-06-05 21:04:30,947 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:04:30,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:04:30,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:04:30,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:04:31,024 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 21:04:31,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356114728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:31,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:04:31,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 21:04:31,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277756291] [2021-06-05 21:04:31,025 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:04:31,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:04:31,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:04:31,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:04:31,025 INFO L87 Difference]: Start difference. First operand 4276 states and 10946 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:31,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:04:31,206 INFO L93 Difference]: Finished difference Result 4915 states and 12209 transitions. [2021-06-05 21:04:31,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 21:04:31,206 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 21:04:31,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:04:31,211 INFO L225 Difference]: With dead ends: 4915 [2021-06-05 21:04:31,211 INFO L226 Difference]: Without dead ends: 4877 [2021-06-05 21:04:31,211 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.3ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:04:31,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4877 states. [2021-06-05 21:04:31,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4877 to 4348. [2021-06-05 21:04:31,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4348 states, 4347 states have (on average 2.5500345065562455) internal successors, (11085), 4347 states have internal predecessors, (11085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:31,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4348 states to 4348 states and 11085 transitions. [2021-06-05 21:04:31,255 INFO L78 Accepts]: Start accepts. Automaton has 4348 states and 11085 transitions. Word has length 44 [2021-06-05 21:04:31,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:04:31,255 INFO L482 AbstractCegarLoop]: Abstraction has 4348 states and 11085 transitions. [2021-06-05 21:04:31,255 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) [2021-06-05 21:04:31,255 INFO L276 IsEmpty]: Start isEmpty. Operand 4348 states and 11085 transitions. [2021-06-05 21:04:31,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 21:04:31,258 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:04:31,258 INFO L554 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:04:31,458 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable348,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:04:31,458 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:04:31,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:04:31,458 INFO L82 PathProgramCache]: Analyzing trace with hash 909434610, now seen corresponding path program 92 times [2021-06-05 21:04:31,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:04:31,459 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800879778] [2021-06-05 21:04:31,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:04:31,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:04:31,502 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 21:04:31,503 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:04:31,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800879778] [2021-06-05 21:04:31,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800879778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:31,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114529294] [2021-06-05 21:04:31,503 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:04:31,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:04:31,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:04:31,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:04:31,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:04:31,652 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 17 proven. 62 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:04:31,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114529294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:31,652 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:04:31,652 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 21:04:31,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613523586] [2021-06-05 21:04:31,652 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:04:31,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:04:31,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:04:31,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:04:31,653 INFO L87 Difference]: Start difference. First operand 4348 states and 11085 transitions. Second operand has 15 states, 15 states have (on average 5.6) internal successors, (84), 14 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:32,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:04:32,326 INFO L93 Difference]: Finished difference Result 6734 states and 15579 transitions. [2021-06-05 21:04:32,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 21:04:32,326 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.6) internal successors, (84), 14 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 21:04:32,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:04:32,333 INFO L225 Difference]: With dead ends: 6734 [2021-06-05 21:04:32,333 INFO L226 Difference]: Without dead ends: 6671 [2021-06-05 21:04:32,333 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 298.7ms TimeCoverageRelationStatistics Valid=207, Invalid=849, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 21:04:32,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6671 states. [2021-06-05 21:04:32,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6671 to 4452. [2021-06-05 21:04:32,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4452 states, 4451 states have (on average 2.5362839811278364) internal successors, (11289), 4451 states have internal predecessors, (11289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:32,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4452 states to 4452 states and 11289 transitions. [2021-06-05 21:04:32,387 INFO L78 Accepts]: Start accepts. Automaton has 4452 states and 11289 transitions. Word has length 44 [2021-06-05 21:04:32,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:04:32,387 INFO L482 AbstractCegarLoop]: Abstraction has 4452 states and 11289 transitions. [2021-06-05 21:04:32,388 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.6) internal successors, (84), 14 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:32,388 INFO L276 IsEmpty]: Start isEmpty. Operand 4452 states and 11289 transitions. [2021-06-05 21:04:32,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 21:04:32,391 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:04:32,391 INFO L554 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:04:32,591 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable349,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:04:32,591 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:04:32,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:04:32,591 INFO L82 PathProgramCache]: Analyzing trace with hash -2003584616, now seen corresponding path program 93 times [2021-06-05 21:04:32,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:04:32,592 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707425033] [2021-06-05 21:04:32,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:04:32,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:04:32,638 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:04:32,638 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:04:32,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707425033] [2021-06-05 21:04:32,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707425033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:32,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776062225] [2021-06-05 21:04:32,639 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:04:32,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 21:04:32,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:04:32,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:04:32,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:04:32,792 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 26 proven. 54 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:04:32,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776062225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:32,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:04:32,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 21:04:32,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599074403] [2021-06-05 21:04:32,793 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:04:32,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:04:32,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:04:32,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:04:32,793 INFO L87 Difference]: Start difference. First operand 4452 states and 11289 transitions. Second operand has 15 states, 15 states have (on average 5.733333333333333) internal successors, (86), 14 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:33,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:04:33,426 INFO L93 Difference]: Finished difference Result 7036 states and 16396 transitions. [2021-06-05 21:04:33,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 21:04:33,427 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.733333333333333) internal successors, (86), 14 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 21:04:33,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:04:33,434 INFO L225 Difference]: With dead ends: 7036 [2021-06-05 21:04:33,434 INFO L226 Difference]: Without dead ends: 6998 [2021-06-05 21:04:33,434 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 279.9ms TimeCoverageRelationStatistics Valid=207, Invalid=849, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 21:04:33,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6998 states. [2021-06-05 21:04:33,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6998 to 4889. [2021-06-05 21:04:33,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4889 states, 4888 states have (on average 2.5384615384615383) internal successors, (12408), 4888 states have internal predecessors, (12408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:33,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4889 states to 4889 states and 12408 transitions. [2021-06-05 21:04:33,488 INFO L78 Accepts]: Start accepts. Automaton has 4889 states and 12408 transitions. Word has length 44 [2021-06-05 21:04:33,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:04:33,488 INFO L482 AbstractCegarLoop]: Abstraction has 4889 states and 12408 transitions. [2021-06-05 21:04:33,488 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.733333333333333) internal successors, (86), 14 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:33,489 INFO L276 IsEmpty]: Start isEmpty. Operand 4889 states and 12408 transitions. [2021-06-05 21:04:33,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 21:04:33,492 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:04:33,492 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:04:33,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:04:33,693 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:04:33,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:04:33,693 INFO L82 PathProgramCache]: Analyzing trace with hash 106678869, now seen corresponding path program 38 times [2021-06-05 21:04:33,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:04:33,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464170535] [2021-06-05 21:04:33,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:04:33,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:04:33,867 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:04:33,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:04:33,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464170535] [2021-06-05 21:04:33,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464170535] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:33,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266925655] [2021-06-05 21:04:33,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:04:33,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:04:33,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:04:33,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:04:33,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:04:34,619 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 36 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:04:34,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266925655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:34,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:04:34,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 29 [2021-06-05 21:04:34,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070466134] [2021-06-05 21:04:34,619 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 21:04:34,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:04:34,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 21:04:34,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=777, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:04:34,620 INFO L87 Difference]: Start difference. First operand 4889 states and 12408 transitions. Second operand has 30 states, 30 states have (on average 2.8666666666666667) internal successors, (86), 29 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:42,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:04:42,418 INFO L93 Difference]: Finished difference Result 12578 states and 28875 transitions. [2021-06-05 21:04:42,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 194 states. [2021-06-05 21:04:42,418 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.8666666666666667) internal successors, (86), 29 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 21:04:42,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:04:42,430 INFO L225 Difference]: With dead ends: 12578 [2021-06-05 21:04:42,430 INFO L226 Difference]: Without dead ends: 12155 [2021-06-05 21:04:42,432 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17409 ImplicationChecksByTransitivity, 6477.5ms TimeCoverageRelationStatistics Valid=5955, Invalid=38777, Unknown=0, NotChecked=0, Total=44732 [2021-06-05 21:04:42,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12155 states. [2021-06-05 21:04:42,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12155 to 6139. [2021-06-05 21:04:42,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6139 states, 6138 states have (on average 2.623330074942978) internal successors, (16102), 6138 states have internal predecessors, (16102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:42,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6139 states to 6139 states and 16102 transitions. [2021-06-05 21:04:42,531 INFO L78 Accepts]: Start accepts. Automaton has 6139 states and 16102 transitions. Word has length 47 [2021-06-05 21:04:42,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:04:42,531 INFO L482 AbstractCegarLoop]: Abstraction has 6139 states and 16102 transitions. [2021-06-05 21:04:42,531 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.8666666666666667) internal successors, (86), 29 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:42,531 INFO L276 IsEmpty]: Start isEmpty. Operand 6139 states and 16102 transitions. [2021-06-05 21:04:42,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 21:04:42,535 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:04:42,535 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:04:42,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable351,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:04:42,736 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:04:42,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:04:42,736 INFO L82 PathProgramCache]: Analyzing trace with hash -1531001323, now seen corresponding path program 94 times [2021-06-05 21:04:42,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:04:42,736 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71010139] [2021-06-05 21:04:42,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:04:42,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:04:42,856 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:04:42,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:04:42,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71010139] [2021-06-05 21:04:42,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71010139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:42,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838384620] [2021-06-05 21:04:42,856 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:04:42,880 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:04:42,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:04:42,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:04:42,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:04:43,102 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:04:43,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838384620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:43,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:04:43,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-05 21:04:43,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796950710] [2021-06-05 21:04:43,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 21:04:43,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:04:43,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 21:04:43,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:04:43,103 INFO L87 Difference]: Start difference. First operand 6139 states and 16102 transitions. Second operand has 20 states, 20 states have (on average 3.35) internal successors, (67), 19 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:43,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:04:43,856 INFO L93 Difference]: Finished difference Result 6357 states and 16438 transitions. [2021-06-05 21:04:43,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:04:43,856 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.35) internal successors, (67), 19 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 21:04:43,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:04:43,863 INFO L225 Difference]: With dead ends: 6357 [2021-06-05 21:04:43,864 INFO L226 Difference]: Without dead ends: 6277 [2021-06-05 21:04:43,864 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 204.3ms TimeCoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:04:43,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6277 states. [2021-06-05 21:04:43,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6277 to 6123. [2021-06-05 21:04:43,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6123 states, 6122 states have (on average 2.6210388761842536) internal successors, (16046), 6122 states have internal predecessors, (16046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:43,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6123 states to 6123 states and 16046 transitions. [2021-06-05 21:04:43,934 INFO L78 Accepts]: Start accepts. Automaton has 6123 states and 16046 transitions. Word has length 47 [2021-06-05 21:04:43,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:04:43,935 INFO L482 AbstractCegarLoop]: Abstraction has 6123 states and 16046 transitions. [2021-06-05 21:04:43,935 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.35) internal successors, (67), 19 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:43,935 INFO L276 IsEmpty]: Start isEmpty. Operand 6123 states and 16046 transitions. [2021-06-05 21:04:43,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 21:04:43,939 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:04:43,939 INFO L554 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:04:44,139 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable361,183 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:04:44,139 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:04:44,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:04:44,140 INFO L82 PathProgramCache]: Analyzing trace with hash 1758131688, now seen corresponding path program 39 times [2021-06-05 21:04:44,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:04:44,140 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499106821] [2021-06-05 21:04:44,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:04:44,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:04:44,224 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 44 proven. 54 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:04:44,224 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:04:44,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499106821] [2021-06-05 21:04:44,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499106821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:44,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833319610] [2021-06-05 21:04:44,225 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:04:44,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 21:04:44,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:04:44,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 21:04:44,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:04:44,327 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 45 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:04:44,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833319610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:44,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:04:44,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 10 [2021-06-05 21:04:44,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654985104] [2021-06-05 21:04:44,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:04:44,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:04:44,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:04:44,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:04:44,328 INFO L87 Difference]: Start difference. First operand 6123 states and 16046 transitions. Second operand has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:44,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:04:44,516 INFO L93 Difference]: Finished difference Result 8127 states and 20029 transitions. [2021-06-05 21:04:44,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:04:44,516 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 21:04:44,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:04:44,526 INFO L225 Difference]: With dead ends: 8127 [2021-06-05 21:04:44,526 INFO L226 Difference]: Without dead ends: 8117 [2021-06-05 21:04:44,526 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 94.1ms TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:04:44,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8117 states. [2021-06-05 21:04:44,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8117 to 6179. [2021-06-05 21:04:44,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6179 states, 6178 states have (on average 2.6264163159598577) internal successors, (16226), 6178 states have internal predecessors, (16226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:44,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6179 states to 6179 states and 16226 transitions. [2021-06-05 21:04:44,616 INFO L78 Accepts]: Start accepts. Automaton has 6179 states and 16226 transitions. Word has length 47 [2021-06-05 21:04:44,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:04:44,616 INFO L482 AbstractCegarLoop]: Abstraction has 6179 states and 16226 transitions. [2021-06-05 21:04:44,616 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:44,616 INFO L276 IsEmpty]: Start isEmpty. Operand 6179 states and 16226 transitions. [2021-06-05 21:04:44,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 21:04:44,621 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:04:44,621 INFO L554 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:04:44,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable362,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:04:44,821 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:04:44,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:04:44,822 INFO L82 PathProgramCache]: Analyzing trace with hash 800939048, now seen corresponding path program 40 times [2021-06-05 21:04:44,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:04:44,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364458376] [2021-06-05 21:04:44,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:04:44,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:04:44,874 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 59 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:04:44,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:04:44,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364458376] [2021-06-05 21:04:44,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364458376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:44,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666528309] [2021-06-05 21:04:44,874 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:04:44,898 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:04:44,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:04:44,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 21:04:44,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:04:44,970 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 60 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:04:44,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666528309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:44,970 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:04:44,970 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 10 [2021-06-05 21:04:44,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185975141] [2021-06-05 21:04:44,970 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:04:44,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:04:44,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:04:44,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:04:44,971 INFO L87 Difference]: Start difference. First operand 6179 states and 16226 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:45,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:04:45,116 INFO L93 Difference]: Finished difference Result 9199 states and 22998 transitions. [2021-06-05 21:04:45,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:04:45,116 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 21:04:45,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:04:45,125 INFO L225 Difference]: With dead ends: 9199 [2021-06-05 21:04:45,126 INFO L226 Difference]: Without dead ends: 9199 [2021-06-05 21:04:45,126 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 57.4ms TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:04:45,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9199 states. [2021-06-05 21:04:45,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9199 to 6799. [2021-06-05 21:04:45,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6799 states, 6798 states have (on average 2.674315975286849) internal successors, (18180), 6798 states have internal predecessors, (18180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:45,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6799 states to 6799 states and 18180 transitions. [2021-06-05 21:04:45,215 INFO L78 Accepts]: Start accepts. Automaton has 6799 states and 18180 transitions. Word has length 47 [2021-06-05 21:04:45,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:04:45,215 INFO L482 AbstractCegarLoop]: Abstraction has 6799 states and 18180 transitions. [2021-06-05 21:04:45,215 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:45,215 INFO L276 IsEmpty]: Start isEmpty. Operand 6799 states and 18180 transitions. [2021-06-05 21:04:45,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 21:04:45,219 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:04:45,219 INFO L554 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:04:45,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable365 [2021-06-05 21:04:45,420 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:04:45,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:04:45,420 INFO L82 PathProgramCache]: Analyzing trace with hash 267073672, now seen corresponding path program 95 times [2021-06-05 21:04:45,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:04:45,420 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580486380] [2021-06-05 21:04:45,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:04:45,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:04:45,475 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 48 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:04:45,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:04:45,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580486380] [2021-06-05 21:04:45,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580486380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:45,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134511655] [2021-06-05 21:04:45,475 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:04:45,500 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 21:04:45,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:04:45,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 21:04:45,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:04:45,601 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 49 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:04:45,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134511655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:45,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:04:45,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 15 [2021-06-05 21:04:45,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455895866] [2021-06-05 21:04:45,601 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:04:45,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:04:45,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:04:45,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:04:45,602 INFO L87 Difference]: Start difference. First operand 6799 states and 18180 transitions. Second operand has 16 states, 16 states have (on average 4.5) internal successors, (72), 15 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:45,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:04:45,823 INFO L93 Difference]: Finished difference Result 7639 states and 19695 transitions. [2021-06-05 21:04:45,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:04:45,823 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.5) internal successors, (72), 15 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 21:04:45,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:04:45,832 INFO L225 Difference]: With dead ends: 7639 [2021-06-05 21:04:45,833 INFO L226 Difference]: Without dead ends: 7633 [2021-06-05 21:04:45,833 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 80.4ms TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:04:45,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7633 states. [2021-06-05 21:04:45,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7633 to 6743. [2021-06-05 21:04:45,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6743 states, 6742 states have (on average 2.6702758825274397) internal successors, (18003), 6742 states have internal predecessors, (18003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:45,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6743 states to 6743 states and 18003 transitions. [2021-06-05 21:04:45,913 INFO L78 Accepts]: Start accepts. Automaton has 6743 states and 18003 transitions. Word has length 47 [2021-06-05 21:04:45,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:04:45,914 INFO L482 AbstractCegarLoop]: Abstraction has 6743 states and 18003 transitions. [2021-06-05 21:04:45,914 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.5) internal successors, (72), 15 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:45,914 INFO L276 IsEmpty]: Start isEmpty. Operand 6743 states and 18003 transitions. [2021-06-05 21:04:45,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 21:04:45,918 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:04:45,918 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:04:46,118 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable366 [2021-06-05 21:04:46,119 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:04:46,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:04:46,119 INFO L82 PathProgramCache]: Analyzing trace with hash -38499627, now seen corresponding path program 41 times [2021-06-05 21:04:46,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:04:46,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468623345] [2021-06-05 21:04:46,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:04:46,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:04:46,188 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 87 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:04:46,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:04:46,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468623345] [2021-06-05 21:04:46,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468623345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:46,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099494791] [2021-06-05 21:04:46,188 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:04:46,216 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 21:04:46,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:04:46,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:04:46,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:04:46,282 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 88 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:04:46,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099494791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:46,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:04:46,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 21:04:46,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913373072] [2021-06-05 21:04:46,282 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:04:46,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:04:46,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:04:46,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:04:46,283 INFO L87 Difference]: Start difference. First operand 6743 states and 18003 transitions. Second operand has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:46,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:04:46,581 INFO L93 Difference]: Finished difference Result 7999 states and 20457 transitions. [2021-06-05 21:04:46,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:04:46,581 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 21:04:46,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:04:46,590 INFO L225 Difference]: With dead ends: 7999 [2021-06-05 21:04:46,590 INFO L226 Difference]: Without dead ends: 7961 [2021-06-05 21:04:46,590 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 101.1ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:04:46,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7961 states. [2021-06-05 21:04:46,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7961 to 6838. [2021-06-05 21:04:46,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6838 states, 6837 states have (on average 2.6676905075325434) internal successors, (18239), 6837 states have internal predecessors, (18239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:46,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6838 states to 6838 states and 18239 transitions. [2021-06-05 21:04:46,674 INFO L78 Accepts]: Start accepts. Automaton has 6838 states and 18239 transitions. Word has length 47 [2021-06-05 21:04:46,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:04:46,674 INFO L482 AbstractCegarLoop]: Abstraction has 6838 states and 18239 transitions. [2021-06-05 21:04:46,674 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:46,674 INFO L276 IsEmpty]: Start isEmpty. Operand 6838 states and 18239 transitions. [2021-06-05 21:04:46,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 21:04:46,678 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:04:46,678 INFO L554 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:04:46,878 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable369,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:04:46,878 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:04:46,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:04:46,879 INFO L82 PathProgramCache]: Analyzing trace with hash -1592196484, now seen corresponding path program 96 times [2021-06-05 21:04:46,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:04:46,879 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209162449] [2021-06-05 21:04:46,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:04:46,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:04:46,925 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 45 proven. 49 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:04:46,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:04:46,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209162449] [2021-06-05 21:04:46,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209162449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:46,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464365984] [2021-06-05 21:04:46,926 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:04:46,953 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 21:04:46,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:04:46,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 21:04:46,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:04:47,050 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 45 proven. 49 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:04:47,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464365984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:47,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:04:47,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 21:04:47,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336483050] [2021-06-05 21:04:47,051 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:04:47,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:04:47,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:04:47,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:04:47,051 INFO L87 Difference]: Start difference. First operand 6838 states and 18239 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:47,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:04:47,178 INFO L93 Difference]: Finished difference Result 7980 states and 20237 transitions. [2021-06-05 21:04:47,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:04:47,178 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 21:04:47,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:04:47,186 INFO L225 Difference]: With dead ends: 7980 [2021-06-05 21:04:47,186 INFO L226 Difference]: Without dead ends: 7977 [2021-06-05 21:04:47,186 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 41.0ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:04:47,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7977 states. [2021-06-05 21:04:47,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7977 to 6818. [2021-06-05 21:04:47,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6818 states, 6817 states have (on average 2.664661874724952) internal successors, (18165), 6817 states have internal predecessors, (18165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:47,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6818 states to 6818 states and 18165 transitions. [2021-06-05 21:04:47,279 INFO L78 Accepts]: Start accepts. Automaton has 6818 states and 18165 transitions. Word has length 47 [2021-06-05 21:04:47,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:04:47,280 INFO L482 AbstractCegarLoop]: Abstraction has 6818 states and 18165 transitions. [2021-06-05 21:04:47,280 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:47,280 INFO L276 IsEmpty]: Start isEmpty. Operand 6818 states and 18165 transitions. [2021-06-05 21:04:47,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 21:04:47,285 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:04:47,285 INFO L554 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:04:47,486 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable370 [2021-06-05 21:04:47,486 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:04:47,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:04:47,486 INFO L82 PathProgramCache]: Analyzing trace with hash -1385133918, now seen corresponding path program 97 times [2021-06-05 21:04:47,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:04:47,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263412216] [2021-06-05 21:04:47,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:04:47,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:04:47,539 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 42 proven. 52 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:04:47,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:04:47,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263412216] [2021-06-05 21:04:47,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263412216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:47,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779222810] [2021-06-05 21:04:47,539 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:04:47,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:04:47,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 21:04:47,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:04:47,628 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 42 proven. 52 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:04:47,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779222810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:47,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:04:47,628 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 21:04:47,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365941416] [2021-06-05 21:04:47,628 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:04:47,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:04:47,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:04:47,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:04:47,629 INFO L87 Difference]: Start difference. First operand 6818 states and 18165 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:47,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:04:47,791 INFO L93 Difference]: Finished difference Result 7990 states and 20202 transitions. [2021-06-05 21:04:47,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:04:47,792 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 21:04:47,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:04:47,800 INFO L225 Difference]: With dead ends: 7990 [2021-06-05 21:04:47,801 INFO L226 Difference]: Without dead ends: 7972 [2021-06-05 21:04:47,801 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 62.4ms TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:04:47,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7972 states. [2021-06-05 21:04:47,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7972 to 6576. [2021-06-05 21:04:47,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6576 states, 6575 states have (on average 2.6518631178707226) internal successors, (17436), 6575 states have internal predecessors, (17436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:47,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6576 states to 6576 states and 17436 transitions. [2021-06-05 21:04:47,888 INFO L78 Accepts]: Start accepts. Automaton has 6576 states and 17436 transitions. Word has length 47 [2021-06-05 21:04:47,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:04:47,888 INFO L482 AbstractCegarLoop]: Abstraction has 6576 states and 17436 transitions. [2021-06-05 21:04:47,888 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:47,888 INFO L276 IsEmpty]: Start isEmpty. Operand 6576 states and 17436 transitions. [2021-06-05 21:04:47,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 21:04:47,893 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:04:47,893 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:04:48,093 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable372,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:04:48,093 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:04:48,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:04:48,093 INFO L82 PathProgramCache]: Analyzing trace with hash 1461833365, now seen corresponding path program 98 times [2021-06-05 21:04:48,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:04:48,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127462970] [2021-06-05 21:04:48,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:04:48,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:04:48,159 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 16 proven. 78 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:04:48,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:04:48,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127462970] [2021-06-05 21:04:48,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127462970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:48,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89291543] [2021-06-05 21:04:48,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:04:48,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:04:48,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:04:48,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:04:48,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:04:48,267 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 83 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:04:48,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89291543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:48,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:04:48,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 21:04:48,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679546227] [2021-06-05 21:04:48,268 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:04:48,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:04:48,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:04:48,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:04:48,268 INFO L87 Difference]: Start difference. First operand 6576 states and 17436 transitions. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:48,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:04:48,679 INFO L93 Difference]: Finished difference Result 7270 states and 18664 transitions. [2021-06-05 21:04:48,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:04:48,679 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 21:04:48,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:04:48,686 INFO L225 Difference]: With dead ends: 7270 [2021-06-05 21:04:48,686 INFO L226 Difference]: Without dead ends: 7232 [2021-06-05 21:04:48,687 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 99.8ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:04:48,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7232 states. [2021-06-05 21:04:48,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7232 to 6547. [2021-06-05 21:04:48,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6547 states, 6546 states have (on average 2.6515429269783075) internal successors, (17357), 6546 states have internal predecessors, (17357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:48,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6547 states to 6547 states and 17357 transitions. [2021-06-05 21:04:48,765 INFO L78 Accepts]: Start accepts. Automaton has 6547 states and 17357 transitions. Word has length 47 [2021-06-05 21:04:48,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:04:48,765 INFO L482 AbstractCegarLoop]: Abstraction has 6547 states and 17357 transitions. [2021-06-05 21:04:48,765 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:48,765 INFO L276 IsEmpty]: Start isEmpty. Operand 6547 states and 17357 transitions. [2021-06-05 21:04:48,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 21:04:48,769 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:04:48,769 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:04:48,970 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable375 [2021-06-05 21:04:48,970 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:04:48,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:04:48,970 INFO L82 PathProgramCache]: Analyzing trace with hash 848297185, now seen corresponding path program 99 times [2021-06-05 21:04:48,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:04:48,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960359692] [2021-06-05 21:04:48,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:04:48,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:04:49,050 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 79 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:04:49,050 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:04:49,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960359692] [2021-06-05 21:04:49,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960359692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:49,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421175285] [2021-06-05 21:04:49,050 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:04:49,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 21:04:49,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:04:49,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:04:49,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:04:49,159 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 80 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:04:49,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421175285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:49,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:04:49,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 21:04:49,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307063134] [2021-06-05 21:04:49,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:04:49,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:04:49,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:04:49,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:04:49,160 INFO L87 Difference]: Start difference. First operand 6547 states and 17357 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:49,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:04:49,533 INFO L93 Difference]: Finished difference Result 7510 states and 19214 transitions. [2021-06-05 21:04:49,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:04:49,533 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 21:04:49,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:04:49,542 INFO L225 Difference]: With dead ends: 7510 [2021-06-05 21:04:49,542 INFO L226 Difference]: Without dead ends: 7498 [2021-06-05 21:04:49,542 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 116.0ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:04:49,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7498 states. [2021-06-05 21:04:49,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7498 to 6557. [2021-06-05 21:04:49,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6557 states, 6556 states have (on average 2.6505491153142158) internal successors, (17377), 6556 states have internal predecessors, (17377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:49,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6557 states to 6557 states and 17377 transitions. [2021-06-05 21:04:49,626 INFO L78 Accepts]: Start accepts. Automaton has 6557 states and 17377 transitions. Word has length 47 [2021-06-05 21:04:49,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:04:49,626 INFO L482 AbstractCegarLoop]: Abstraction has 6557 states and 17377 transitions. [2021-06-05 21:04:49,626 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) [2021-06-05 21:04:49,626 INFO L276 IsEmpty]: Start isEmpty. Operand 6557 states and 17377 transitions. [2021-06-05 21:04:49,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 21:04:49,630 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:04:49,630 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:04:49,831 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable376 [2021-06-05 21:04:49,831 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:04:49,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:04:49,831 INFO L82 PathProgramCache]: Analyzing trace with hash -1304752777, now seen corresponding path program 100 times [2021-06-05 21:04:49,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:04:49,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843804169] [2021-06-05 21:04:49,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:04:49,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:04:49,897 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:04:49,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:04:49,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843804169] [2021-06-05 21:04:49,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843804169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:49,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038163473] [2021-06-05 21:04:49,897 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:04:49,927 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:04:49,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:04:49,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:04:49,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:04:49,997 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:04:49,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038163473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:49,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:04:49,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 21:04:49,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129610115] [2021-06-05 21:04:49,998 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:04:49,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:04:49,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:04:49,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:04:49,998 INFO L87 Difference]: Start difference. First operand 6557 states and 17377 transitions. Second operand has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:50,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:04:50,391 INFO L93 Difference]: Finished difference Result 8002 states and 20257 transitions. [2021-06-05 21:04:50,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:04:50,392 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 21:04:50,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:04:50,400 INFO L225 Difference]: With dead ends: 8002 [2021-06-05 21:04:50,400 INFO L226 Difference]: Without dead ends: 7990 [2021-06-05 21:04:50,401 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 123.8ms TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:04:50,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7990 states. [2021-06-05 21:04:50,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7990 to 6589. [2021-06-05 21:04:50,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6589 states, 6588 states have (on average 2.6495142683667274) internal successors, (17455), 6588 states have internal predecessors, (17455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:50,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6589 states to 6589 states and 17455 transitions. [2021-06-05 21:04:50,489 INFO L78 Accepts]: Start accepts. Automaton has 6589 states and 17455 transitions. Word has length 47 [2021-06-05 21:04:50,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:04:50,489 INFO L482 AbstractCegarLoop]: Abstraction has 6589 states and 17455 transitions. [2021-06-05 21:04:50,489 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:50,489 INFO L276 IsEmpty]: Start isEmpty. Operand 6589 states and 17455 transitions. [2021-06-05 21:04:50,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 21:04:50,494 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:04:50,494 INFO L554 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:04:50,694 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 192 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable377 [2021-06-05 21:04:50,694 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:04:50,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:04:50,695 INFO L82 PathProgramCache]: Analyzing trace with hash -1542814294, now seen corresponding path program 42 times [2021-06-05 21:04:50,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:04:50,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345339089] [2021-06-05 21:04:50,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:04:50,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:04:50,744 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 63 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:04:50,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:04:50,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345339089] [2021-06-05 21:04:50,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345339089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:50,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459314825] [2021-06-05 21:04:50,744 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:04:50,775 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 21:04:50,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:04:50,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 21:04:50,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:04:50,886 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 64 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:04:50,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459314825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:50,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:04:50,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14] total 16 [2021-06-05 21:04:50,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297330757] [2021-06-05 21:04:50,887 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:04:50,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:04:50,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:04:50,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:04:50,887 INFO L87 Difference]: Start difference. First operand 6589 states and 17455 transitions. Second operand has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 16 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:51,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:04:51,117 INFO L93 Difference]: Finished difference Result 9290 states and 23114 transitions. [2021-06-05 21:04:51,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:04:51,118 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 16 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 21:04:51,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:04:51,126 INFO L225 Difference]: With dead ends: 9290 [2021-06-05 21:04:51,127 INFO L226 Difference]: Without dead ends: 9268 [2021-06-05 21:04:51,127 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 127.4ms TimeCoverageRelationStatistics Valid=175, Invalid=287, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:04:51,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9268 states. [2021-06-05 21:04:51,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9268 to 6764. [2021-06-05 21:04:51,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6764 states, 6763 states have (on average 2.6578441520035487) internal successors, (17975), 6763 states have internal predecessors, (17975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:51,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6764 states to 6764 states and 17975 transitions. [2021-06-05 21:04:51,221 INFO L78 Accepts]: Start accepts. Automaton has 6764 states and 17975 transitions. Word has length 47 [2021-06-05 21:04:51,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:04:51,222 INFO L482 AbstractCegarLoop]: Abstraction has 6764 states and 17975 transitions. [2021-06-05 21:04:51,222 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 16 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:51,222 INFO L276 IsEmpty]: Start isEmpty. Operand 6764 states and 17975 transitions. [2021-06-05 21:04:51,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 21:04:51,227 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:04:51,227 INFO L554 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:04:51,427 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable378 [2021-06-05 21:04:51,427 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:04:51,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:04:51,427 INFO L82 PathProgramCache]: Analyzing trace with hash 2130272592, now seen corresponding path program 43 times [2021-06-05 21:04:51,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:04:51,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705123302] [2021-06-05 21:04:51,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:04:51,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:04:51,479 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 63 proven. 34 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:04:51,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:04:51,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705123302] [2021-06-05 21:04:51,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705123302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:51,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983888239] [2021-06-05 21:04:51,480 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:04:51,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:04:51,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 21:04:51,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:04:51,576 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 64 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:04:51,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983888239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:51,576 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:04:51,576 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 10 [2021-06-05 21:04:51,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380121458] [2021-06-05 21:04:51,576 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:04:51,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:04:51,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:04:51,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:04:51,577 INFO L87 Difference]: Start difference. First operand 6764 states and 17975 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:51,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:04:51,749 INFO L93 Difference]: Finished difference Result 9757 states and 24151 transitions. [2021-06-05 21:04:51,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:04:51,749 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 21:04:51,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:04:51,760 INFO L225 Difference]: With dead ends: 9757 [2021-06-05 21:04:51,760 INFO L226 Difference]: Without dead ends: 9757 [2021-06-05 21:04:51,760 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 62.1ms TimeCoverageRelationStatistics Valid=65, Invalid=91, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:04:51,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9757 states. [2021-06-05 21:04:51,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9757 to 6769. [2021-06-05 21:04:51,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6769 states, 6768 states have (on average 2.6569148936170213) internal successors, (17982), 6768 states have internal predecessors, (17982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:51,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6769 states to 6769 states and 17982 transitions. [2021-06-05 21:04:51,854 INFO L78 Accepts]: Start accepts. Automaton has 6769 states and 17982 transitions. Word has length 47 [2021-06-05 21:04:51,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:04:51,854 INFO L482 AbstractCegarLoop]: Abstraction has 6769 states and 17982 transitions. [2021-06-05 21:04:51,855 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:51,855 INFO L276 IsEmpty]: Start isEmpty. Operand 6769 states and 17982 transitions. [2021-06-05 21:04:51,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 21:04:51,859 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:04:51,859 INFO L554 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:04:52,059 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable379,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:04:52,060 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:04:52,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:04:52,060 INFO L82 PathProgramCache]: Analyzing trace with hash 492700136, now seen corresponding path program 44 times [2021-06-05 21:04:52,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:04:52,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385346276] [2021-06-05 21:04:52,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:04:52,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:04:52,118 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 60 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:04:52,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:04:52,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385346276] [2021-06-05 21:04:52,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385346276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:52,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278385908] [2021-06-05 21:04:52,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:04:52,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:04:52,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:04:52,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 21:04:52,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:04:52,222 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 61 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:04:52,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278385908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:52,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:04:52,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 11 [2021-06-05 21:04:52,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887674606] [2021-06-05 21:04:52,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:04:52,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:04:52,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:04:52,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:04:52,223 INFO L87 Difference]: Start difference. First operand 6769 states and 17982 transitions. Second operand has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:52,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:04:52,423 INFO L93 Difference]: Finished difference Result 8996 states and 22443 transitions. [2021-06-05 21:04:52,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:04:52,423 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 21:04:52,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:04:52,432 INFO L225 Difference]: With dead ends: 8996 [2021-06-05 21:04:52,432 INFO L226 Difference]: Without dead ends: 8996 [2021-06-05 21:04:52,433 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 80.7ms TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:04:52,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8996 states. [2021-06-05 21:04:52,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8996 to 6596. [2021-06-05 21:04:52,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6596 states, 6595 states have (on average 2.650037907505686) internal successors, (17477), 6595 states have internal predecessors, (17477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:52,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6596 states to 6596 states and 17477 transitions. [2021-06-05 21:04:52,523 INFO L78 Accepts]: Start accepts. Automaton has 6596 states and 17477 transitions. Word has length 47 [2021-06-05 21:04:52,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:04:52,523 INFO L482 AbstractCegarLoop]: Abstraction has 6596 states and 17477 transitions. [2021-06-05 21:04:52,523 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:52,524 INFO L276 IsEmpty]: Start isEmpty. Operand 6596 states and 17477 transitions. [2021-06-05 21:04:52,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 21:04:52,528 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:04:52,528 INFO L554 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:04:52,729 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable380 [2021-06-05 21:04:52,729 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:04:52,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:04:52,729 INFO L82 PathProgramCache]: Analyzing trace with hash 227806332, now seen corresponding path program 101 times [2021-06-05 21:04:52,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:04:52,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282673924] [2021-06-05 21:04:52,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:04:52,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:04:52,794 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 44 proven. 54 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:04:52,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:04:52,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282673924] [2021-06-05 21:04:52,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282673924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:52,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978582410] [2021-06-05 21:04:52,794 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:04:52,819 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 21:04:52,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:04:52,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 21:04:52,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:04:52,977 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 45 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:04:52,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978582410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:52,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:04:52,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2021-06-05 21:04:52,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756824375] [2021-06-05 21:04:52,977 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:04:52,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:04:52,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:04:52,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:04:52,978 INFO L87 Difference]: Start difference. First operand 6596 states and 17477 transitions. Second operand has 16 states, 16 states have (on average 4.375) internal successors, (70), 15 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:53,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:04:53,240 INFO L93 Difference]: Finished difference Result 7771 states and 19586 transitions. [2021-06-05 21:04:53,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:04:53,240 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.375) internal successors, (70), 15 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 21:04:53,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:04:53,248 INFO L225 Difference]: With dead ends: 7771 [2021-06-05 21:04:53,248 INFO L226 Difference]: Without dead ends: 7753 [2021-06-05 21:04:53,248 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 108.6ms TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:04:53,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7753 states. [2021-06-05 21:04:53,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7753 to 6596. [2021-06-05 21:04:53,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6596 states, 6595 states have (on average 2.648521607278241) internal successors, (17467), 6595 states have internal predecessors, (17467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:53,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6596 states to 6596 states and 17467 transitions. [2021-06-05 21:04:53,324 INFO L78 Accepts]: Start accepts. Automaton has 6596 states and 17467 transitions. Word has length 47 [2021-06-05 21:04:53,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:04:53,324 INFO L482 AbstractCegarLoop]: Abstraction has 6596 states and 17467 transitions. [2021-06-05 21:04:53,324 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.375) internal successors, (70), 15 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:53,324 INFO L276 IsEmpty]: Start isEmpty. Operand 6596 states and 17467 transitions. [2021-06-05 21:04:53,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 21:04:53,329 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:04:53,329 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:04:53,529 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable381,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:04:53,529 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:04:53,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:04:53,529 INFO L82 PathProgramCache]: Analyzing trace with hash -866264581, now seen corresponding path program 45 times [2021-06-05 21:04:53,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:04:53,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140491153] [2021-06-05 21:04:53,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:04:53,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:04:53,599 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 87 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:04:53,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:04:53,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140491153] [2021-06-05 21:04:53,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140491153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:53,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490598670] [2021-06-05 21:04:53,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:04:53,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 21:04:53,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:04:53,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 21:04:53,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:04:53,821 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:04:53,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490598670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:53,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:04:53,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 21 [2021-06-05 21:04:53,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349443767] [2021-06-05 21:04:53,822 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:04:53,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:04:53,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:04:53,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:04:53,822 INFO L87 Difference]: Start difference. First operand 6596 states and 17467 transitions. Second operand has 22 states, 22 states have (on average 3.8636363636363638) internal successors, (85), 21 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:54,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:04:54,954 INFO L93 Difference]: Finished difference Result 8359 states and 20936 transitions. [2021-06-05 21:04:54,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 21:04:54,955 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.8636363636363638) internal successors, (85), 21 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 21:04:54,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:04:54,963 INFO L225 Difference]: With dead ends: 8359 [2021-06-05 21:04:54,963 INFO L226 Difference]: Without dead ends: 8301 [2021-06-05 21:04:54,963 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 339.9ms TimeCoverageRelationStatistics Valid=162, Invalid=1478, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 21:04:54,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8301 states. [2021-06-05 21:04:55,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8301 to 6703. [2021-06-05 21:04:55,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6703 states, 6702 states have (on average 2.645777379886601) internal successors, (17732), 6702 states have internal predecessors, (17732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:55,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6703 states to 6703 states and 17732 transitions. [2021-06-05 21:04:55,049 INFO L78 Accepts]: Start accepts. Automaton has 6703 states and 17732 transitions. Word has length 47 [2021-06-05 21:04:55,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:04:55,049 INFO L482 AbstractCegarLoop]: Abstraction has 6703 states and 17732 transitions. [2021-06-05 21:04:55,049 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.8636363636363638) internal successors, (85), 21 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:55,049 INFO L276 IsEmpty]: Start isEmpty. Operand 6703 states and 17732 transitions. [2021-06-05 21:04:55,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 21:04:55,054 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:04:55,054 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:04:55,254 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable385 [2021-06-05 21:04:55,254 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:04:55,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:04:55,254 INFO L82 PathProgramCache]: Analyzing trace with hash 634068411, now seen corresponding path program 102 times [2021-06-05 21:04:55,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:04:55,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374661190] [2021-06-05 21:04:55,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:04:55,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:04:55,320 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 16 proven. 78 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:04:55,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:04:55,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374661190] [2021-06-05 21:04:55,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374661190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:55,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889777271] [2021-06-05 21:04:55,320 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:04:55,348 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 21:04:55,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:04:55,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:04:55,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:04:55,428 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 83 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:04:55,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889777271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:55,428 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:04:55,428 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 21:04:55,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479250502] [2021-06-05 21:04:55,428 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:04:55,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:04:55,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:04:55,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:04:55,428 INFO L87 Difference]: Start difference. First operand 6703 states and 17732 transitions. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:55,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:04:55,886 INFO L93 Difference]: Finished difference Result 7388 states and 18942 transitions. [2021-06-05 21:04:55,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:04:55,887 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 21:04:55,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:04:55,895 INFO L225 Difference]: With dead ends: 7388 [2021-06-05 21:04:55,895 INFO L226 Difference]: Without dead ends: 7332 [2021-06-05 21:04:55,895 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 100.5ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:04:55,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7332 states. [2021-06-05 21:04:56,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7332 to 6671. [2021-06-05 21:04:56,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6671 states, 6670 states have (on average 2.643478260869565) internal successors, (17632), 6670 states have internal predecessors, (17632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:56,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6671 states to 6671 states and 17632 transitions. [2021-06-05 21:04:56,021 INFO L78 Accepts]: Start accepts. Automaton has 6671 states and 17632 transitions. Word has length 47 [2021-06-05 21:04:56,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:04:56,021 INFO L482 AbstractCegarLoop]: Abstraction has 6671 states and 17632 transitions. [2021-06-05 21:04:56,021 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:56,021 INFO L276 IsEmpty]: Start isEmpty. Operand 6671 states and 17632 transitions. [2021-06-05 21:04:56,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 21:04:56,026 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:04:56,026 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:04:56,226 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable386 [2021-06-05 21:04:56,227 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:04:56,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:04:56,227 INFO L82 PathProgramCache]: Analyzing trace with hash 20532231, now seen corresponding path program 103 times [2021-06-05 21:04:56,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:04:56,227 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520536098] [2021-06-05 21:04:56,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:04:56,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:04:56,296 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 79 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:04:56,296 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:04:56,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520536098] [2021-06-05 21:04:56,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520536098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:56,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730746715] [2021-06-05 21:04:56,297 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:04:56,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:04:56,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:04:56,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:04:56,387 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 80 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:04:56,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730746715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:56,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:04:56,387 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 21:04:56,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417104846] [2021-06-05 21:04:56,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:04:56,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:04:56,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:04:56,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:04:56,388 INFO L87 Difference]: Start difference. First operand 6671 states and 17632 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:56,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:04:56,713 INFO L93 Difference]: Finished difference Result 7705 states and 19640 transitions. [2021-06-05 21:04:56,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:04:56,714 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 21:04:56,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:04:56,722 INFO L225 Difference]: With dead ends: 7705 [2021-06-05 21:04:56,722 INFO L226 Difference]: Without dead ends: 7693 [2021-06-05 21:04:56,722 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 101.1ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:04:56,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7693 states. [2021-06-05 21:04:56,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7693 to 6695. [2021-06-05 21:04:56,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6695 states, 6694 states have (on average 2.642067523155064) internal successors, (17686), 6694 states have internal predecessors, (17686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:56,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6695 states to 6695 states and 17686 transitions. [2021-06-05 21:04:56,816 INFO L78 Accepts]: Start accepts. Automaton has 6695 states and 17686 transitions. Word has length 47 [2021-06-05 21:04:56,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:04:56,816 INFO L482 AbstractCegarLoop]: Abstraction has 6695 states and 17686 transitions. [2021-06-05 21:04:56,816 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) [2021-06-05 21:04:56,816 INFO L276 IsEmpty]: Start isEmpty. Operand 6695 states and 17686 transitions. [2021-06-05 21:04:56,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 21:04:56,821 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:04:56,821 INFO L554 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:04:57,021 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable387,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:04:57,022 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:04:57,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:04:57,022 INFO L82 PathProgramCache]: Analyzing trace with hash -136767256, now seen corresponding path program 46 times [2021-06-05 21:04:57,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:04:57,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630105350] [2021-06-05 21:04:57,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:04:57,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:04:57,071 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 58 proven. 39 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:04:57,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:04:57,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630105350] [2021-06-05 21:04:57,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630105350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:57,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014727563] [2021-06-05 21:04:57,072 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:04:57,096 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:04:57,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:04:57,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 21:04:57,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:04:57,164 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 60 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:04:57,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014727563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:57,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:04:57,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 10 [2021-06-05 21:04:57,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184011818] [2021-06-05 21:04:57,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:04:57,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:04:57,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:04:57,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:04:57,165 INFO L87 Difference]: Start difference. First operand 6695 states and 17686 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:57,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:04:57,327 INFO L93 Difference]: Finished difference Result 8625 states and 21596 transitions. [2021-06-05 21:04:57,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:04:57,328 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 21:04:57,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:04:57,337 INFO L225 Difference]: With dead ends: 8625 [2021-06-05 21:04:57,337 INFO L226 Difference]: Without dead ends: 8605 [2021-06-05 21:04:57,337 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 66.2ms TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:04:57,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8605 states. [2021-06-05 21:04:57,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8605 to 6862. [2021-06-05 21:04:57,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6862 states, 6861 states have (on average 2.6453869698294707) internal successors, (18150), 6861 states have internal predecessors, (18150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:57,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6862 states to 6862 states and 18150 transitions. [2021-06-05 21:04:57,434 INFO L78 Accepts]: Start accepts. Automaton has 6862 states and 18150 transitions. Word has length 47 [2021-06-05 21:04:57,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:04:57,434 INFO L482 AbstractCegarLoop]: Abstraction has 6862 states and 18150 transitions. [2021-06-05 21:04:57,434 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:57,434 INFO L276 IsEmpty]: Start isEmpty. Operand 6862 states and 18150 transitions. [2021-06-05 21:04:57,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 21:04:57,439 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:04:57,439 INFO L554 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:04:57,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable388 [2021-06-05 21:04:57,640 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:04:57,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:04:57,640 INFO L82 PathProgramCache]: Analyzing trace with hash -1627825272, now seen corresponding path program 104 times [2021-06-05 21:04:57,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:04:57,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672985783] [2021-06-05 21:04:57,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:04:57,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:04:57,689 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 33 proven. 63 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:04:57,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:04:57,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672985783] [2021-06-05 21:04:57,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672985783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:57,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074884088] [2021-06-05 21:04:57,689 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:04:57,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:04:57,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:04:57,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 21:04:57,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:04:57,778 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 33 proven. 63 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:04:57,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074884088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:57,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:04:57,778 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 21:04:57,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853940831] [2021-06-05 21:04:57,778 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:04:57,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:04:57,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:04:57,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:04:57,779 INFO L87 Difference]: Start difference. First operand 6862 states and 18150 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:57,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:04:57,921 INFO L93 Difference]: Finished difference Result 8135 states and 20382 transitions. [2021-06-05 21:04:57,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:04:57,921 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 21:04:57,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:04:57,930 INFO L225 Difference]: With dead ends: 8135 [2021-06-05 21:04:57,930 INFO L226 Difference]: Without dead ends: 8117 [2021-06-05 21:04:57,930 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 60.4ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:04:57,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8117 states. [2021-06-05 21:04:58,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8117 to 6838. [2021-06-05 21:04:58,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6838 states, 6837 states have (on average 2.640485593096387) internal successors, (18053), 6837 states have internal predecessors, (18053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:58,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6838 states to 6838 states and 18053 transitions. [2021-06-05 21:04:58,024 INFO L78 Accepts]: Start accepts. Automaton has 6838 states and 18053 transitions. Word has length 47 [2021-06-05 21:04:58,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:04:58,024 INFO L482 AbstractCegarLoop]: Abstraction has 6838 states and 18053 transitions. [2021-06-05 21:04:58,025 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) [2021-06-05 21:04:58,025 INFO L276 IsEmpty]: Start isEmpty. Operand 6838 states and 18053 transitions. [2021-06-05 21:04:58,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 21:04:58,030 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:04:58,030 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:04:58,230 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable391,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:04:58,230 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:04:58,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:04:58,231 INFO L82 PathProgramCache]: Analyzing trace with hash -2132517731, now seen corresponding path program 105 times [2021-06-05 21:04:58,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:04:58,231 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108199896] [2021-06-05 21:04:58,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:04:58,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:04:58,318 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 81 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:04:58,319 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:04:58,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108199896] [2021-06-05 21:04:58,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108199896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:58,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387682748] [2021-06-05 21:04:58,319 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:04:58,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 21:04:58,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:04:58,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:04:58,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:04:58,412 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 82 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:04:58,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387682748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:58,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:04:58,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 21:04:58,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551471577] [2021-06-05 21:04:58,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:04:58,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:04:58,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:04:58,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:04:58,413 INFO L87 Difference]: Start difference. First operand 6838 states and 18053 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:58,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:04:58,827 INFO L93 Difference]: Finished difference Result 8679 states and 21810 transitions. [2021-06-05 21:04:58,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:04:58,827 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 21:04:58,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:04:58,837 INFO L225 Difference]: With dead ends: 8679 [2021-06-05 21:04:58,838 INFO L226 Difference]: Without dead ends: 8637 [2021-06-05 21:04:58,838 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 151.6ms TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:04:58,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8637 states. [2021-06-05 21:04:58,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8637 to 6900. [2021-06-05 21:04:58,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6900 states, 6899 states have (on average 2.6408175097840267) internal successors, (18219), 6899 states have internal predecessors, (18219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:58,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6900 states to 6900 states and 18219 transitions. [2021-06-05 21:04:58,953 INFO L78 Accepts]: Start accepts. Automaton has 6900 states and 18219 transitions. Word has length 47 [2021-06-05 21:04:58,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:04:58,953 INFO L482 AbstractCegarLoop]: Abstraction has 6900 states and 18219 transitions. [2021-06-05 21:04:58,953 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:58,953 INFO L276 IsEmpty]: Start isEmpty. Operand 6900 states and 18219 transitions. [2021-06-05 21:04:58,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 21:04:58,958 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:04:58,958 INFO L554 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:04:59,159 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable394,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:04:59,159 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:04:59,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:04:59,159 INFO L82 PathProgramCache]: Analyzing trace with hash -599958622, now seen corresponding path program 106 times [2021-06-05 21:04:59,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:04:59,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291085737] [2021-06-05 21:04:59,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:04:59,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:04:59,215 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 32 proven. 65 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:04:59,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:04:59,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291085737] [2021-06-05 21:04:59,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291085737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:59,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907565333] [2021-06-05 21:04:59,215 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:04:59,239 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:04:59,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:04:59,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 21:04:59,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:04:59,304 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 32 proven. 65 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:04:59,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907565333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:59,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:04:59,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 21:04:59,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844737827] [2021-06-05 21:04:59,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:04:59,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:04:59,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:04:59,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:04:59,305 INFO L87 Difference]: Start difference. First operand 6900 states and 18219 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:59,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:04:59,491 INFO L93 Difference]: Finished difference Result 8193 states and 20486 transitions. [2021-06-05 21:04:59,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:04:59,492 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 21:04:59,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:04:59,501 INFO L225 Difference]: With dead ends: 8193 [2021-06-05 21:04:59,501 INFO L226 Difference]: Without dead ends: 8169 [2021-06-05 21:04:59,501 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 67.9ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:04:59,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8169 states. [2021-06-05 21:04:59,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8169 to 6661. [2021-06-05 21:04:59,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6661 states, 6660 states have (on average 2.6294294294294294) internal successors, (17512), 6660 states have internal predecessors, (17512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:59,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6661 states to 6661 states and 17512 transitions. [2021-06-05 21:04:59,597 INFO L78 Accepts]: Start accepts. Automaton has 6661 states and 17512 transitions. Word has length 47 [2021-06-05 21:04:59,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:04:59,598 INFO L482 AbstractCegarLoop]: Abstraction has 6661 states and 17512 transitions. [2021-06-05 21:04:59,598 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:59,598 INFO L276 IsEmpty]: Start isEmpty. Operand 6661 states and 17512 transitions. [2021-06-05 21:04:59,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 21:04:59,603 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:04:59,603 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:04:59,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable395,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:04:59,804 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:04:59,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:04:59,804 INFO L82 PathProgramCache]: Analyzing trace with hash -1977681197, now seen corresponding path program 107 times [2021-06-05 21:04:59,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:04:59,804 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888406441] [2021-06-05 21:04:59,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:04:59,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:04:59,882 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:04:59,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:04:59,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888406441] [2021-06-05 21:04:59,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888406441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:59,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447411883] [2021-06-05 21:04:59,882 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:04:59,910 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-05 21:04:59,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:04:59,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:04:59,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:04:59,974 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:04:59,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447411883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:59,975 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:04:59,975 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 21:04:59,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924083200] [2021-06-05 21:04:59,975 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:04:59,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:04:59,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:04:59,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:04:59,975 INFO L87 Difference]: Start difference. First operand 6661 states and 17512 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:00,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:05:00,443 INFO L93 Difference]: Finished difference Result 8662 states and 21553 transitions. [2021-06-05 21:05:00,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:05:00,444 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 21:05:00,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:05:00,452 INFO L225 Difference]: With dead ends: 8662 [2021-06-05 21:05:00,452 INFO L226 Difference]: Without dead ends: 8608 [2021-06-05 21:05:00,452 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 158.2ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:05:00,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8608 states. [2021-06-05 21:05:00,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8608 to 6632. [2021-06-05 21:05:00,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6632 states, 6631 states have (on average 2.625546674709697) internal successors, (17410), 6631 states have internal predecessors, (17410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:00,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6632 states to 6632 states and 17410 transitions. [2021-06-05 21:05:00,534 INFO L78 Accepts]: Start accepts. Automaton has 6632 states and 17410 transitions. Word has length 47 [2021-06-05 21:05:00,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:05:00,534 INFO L482 AbstractCegarLoop]: Abstraction has 6632 states and 17410 transitions. [2021-06-05 21:05:00,534 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:00,534 INFO L276 IsEmpty]: Start isEmpty. Operand 6632 states and 17410 transitions. [2021-06-05 21:05:00,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 21:05:00,538 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:05:00,538 INFO L554 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:05:00,739 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable399 [2021-06-05 21:05:00,739 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:05:00,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:05:00,739 INFO L82 PathProgramCache]: Analyzing trace with hash 1457344172, now seen corresponding path program 47 times [2021-06-05 21:05:00,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:05:00,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457487980] [2021-06-05 21:05:00,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:05:00,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:05:00,788 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 73 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:05:00,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:05:00,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457487980] [2021-06-05 21:05:00,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457487980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:00,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425447570] [2021-06-05 21:05:00,788 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:05:00,817 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 21:05:00,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:05:00,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 21:05:00,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:05:00,940 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 75 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:05:00,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425447570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:00,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:05:00,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 15] total 17 [2021-06-05 21:05:00,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139181519] [2021-06-05 21:05:00,941 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:05:00,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:05:00,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:05:00,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:05:00,941 INFO L87 Difference]: Start difference. First operand 6632 states and 17410 transitions. Second operand has 18 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 17 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:01,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:05:01,285 INFO L93 Difference]: Finished difference Result 10971 states and 26933 transitions. [2021-06-05 21:05:01,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:05:01,285 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 17 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 21:05:01,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:05:01,297 INFO L225 Difference]: With dead ends: 10971 [2021-06-05 21:05:01,297 INFO L226 Difference]: Without dead ends: 10971 [2021-06-05 21:05:01,297 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 175.3ms TimeCoverageRelationStatistics Valid=221, Invalid=331, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:05:01,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10971 states. [2021-06-05 21:05:01,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10971 to 6822. [2021-06-05 21:05:01,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6822 states, 6821 states have (on average 2.637443190148072) internal successors, (17990), 6821 states have internal predecessors, (17990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:01,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6822 states to 6822 states and 17990 transitions. [2021-06-05 21:05:01,401 INFO L78 Accepts]: Start accepts. Automaton has 6822 states and 17990 transitions. Word has length 47 [2021-06-05 21:05:01,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:05:01,401 INFO L482 AbstractCegarLoop]: Abstraction has 6822 states and 17990 transitions. [2021-06-05 21:05:01,401 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 17 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:01,401 INFO L276 IsEmpty]: Start isEmpty. Operand 6822 states and 17990 transitions. [2021-06-05 21:05:01,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 21:05:01,405 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:05:01,405 INFO L554 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:05:01,606 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable400,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:05:01,606 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:05:01,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:05:01,606 INFO L82 PathProgramCache]: Analyzing trace with hash -180228284, now seen corresponding path program 48 times [2021-06-05 21:05:01,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:05:01,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623543104] [2021-06-05 21:05:01,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:05:01,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:05:01,663 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 71 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:05:01,664 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:05:01,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623543104] [2021-06-05 21:05:01,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623543104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:01,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677893926] [2021-06-05 21:05:01,664 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:05:01,690 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 21:05:01,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:05:01,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 21:05:01,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:05:01,762 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 72 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:05:01,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677893926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:01,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:05:01,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 11 [2021-06-05 21:05:01,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221146474] [2021-06-05 21:05:01,762 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:05:01,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:05:01,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:05:01,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:05:01,762 INFO L87 Difference]: Start difference. First operand 6822 states and 17990 transitions. Second operand has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:01,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:05:01,995 INFO L93 Difference]: Finished difference Result 10273 states and 25277 transitions. [2021-06-05 21:05:01,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:05:01,996 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 21:05:01,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:05:02,007 INFO L225 Difference]: With dead ends: 10273 [2021-06-05 21:05:02,007 INFO L226 Difference]: Without dead ends: 10273 [2021-06-05 21:05:02,007 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 92.1ms TimeCoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:05:02,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10273 states. [2021-06-05 21:05:02,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10273 to 6822. [2021-06-05 21:05:02,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6822 states, 6821 states have (on average 2.6365635537311243) internal successors, (17984), 6821 states have internal predecessors, (17984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:02,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6822 states to 6822 states and 17984 transitions. [2021-06-05 21:05:02,130 INFO L78 Accepts]: Start accepts. Automaton has 6822 states and 17984 transitions. Word has length 47 [2021-06-05 21:05:02,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:05:02,130 INFO L482 AbstractCegarLoop]: Abstraction has 6822 states and 17984 transitions. [2021-06-05 21:05:02,130 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:02,130 INFO L276 IsEmpty]: Start isEmpty. Operand 6822 states and 17984 transitions. [2021-06-05 21:05:02,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 21:05:02,136 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:05:02,136 INFO L554 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:05:02,337 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable401,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:05:02,337 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:05:02,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:05:02,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1870223448, now seen corresponding path program 49 times [2021-06-05 21:05:02,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:05:02,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470459081] [2021-06-05 21:05:02,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:05:02,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:05:02,406 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 61 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:05:02,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:05:02,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470459081] [2021-06-05 21:05:02,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470459081] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:02,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671032625] [2021-06-05 21:05:02,406 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:05:02,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:05:02,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 21:05:02,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:05:02,504 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 62 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:05:02,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671032625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:02,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:05:02,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 12 [2021-06-05 21:05:02,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142528023] [2021-06-05 21:05:02,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:05:02,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:05:02,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:05:02,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:05:02,505 INFO L87 Difference]: Start difference. First operand 6822 states and 17984 transitions. Second operand has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:02,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:05:02,753 INFO L93 Difference]: Finished difference Result 8962 states and 22325 transitions. [2021-06-05 21:05:02,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:05:02,753 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 21:05:02,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:05:02,763 INFO L225 Difference]: With dead ends: 8962 [2021-06-05 21:05:02,763 INFO L226 Difference]: Without dead ends: 8962 [2021-06-05 21:05:02,764 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 102.8ms TimeCoverageRelationStatistics Valid=116, Invalid=190, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:05:02,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8962 states. [2021-06-05 21:05:02,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8962 to 6635. [2021-06-05 21:05:02,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6635 states, 6634 states have (on average 2.635061802833886) internal successors, (17481), 6634 states have internal predecessors, (17481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:02,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6635 states to 6635 states and 17481 transitions. [2021-06-05 21:05:02,860 INFO L78 Accepts]: Start accepts. Automaton has 6635 states and 17481 transitions. Word has length 47 [2021-06-05 21:05:02,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:05:02,860 INFO L482 AbstractCegarLoop]: Abstraction has 6635 states and 17481 transitions. [2021-06-05 21:05:02,860 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:02,860 INFO L276 IsEmpty]: Start isEmpty. Operand 6635 states and 17481 transitions. [2021-06-05 21:05:02,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 21:05:02,865 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:05:02,865 INFO L554 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:05:03,065 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable402 [2021-06-05 21:05:03,066 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:05:03,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:05:03,066 INFO L82 PathProgramCache]: Analyzing trace with hash -1591078520, now seen corresponding path program 108 times [2021-06-05 21:05:03,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:05:03,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703658633] [2021-06-05 21:05:03,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:05:03,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:05:03,131 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 37 proven. 61 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:05:03,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:05:03,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703658633] [2021-06-05 21:05:03,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703658633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:03,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482213990] [2021-06-05 21:05:03,131 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:05:03,157 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 21:05:03,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:05:03,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 21:05:03,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:05:03,239 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 37 proven. 61 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:05:03,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482213990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:03,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:05:03,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 21:05:03,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858677482] [2021-06-05 21:05:03,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:05:03,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:05:03,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:05:03,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:05:03,241 INFO L87 Difference]: Start difference. First operand 6635 states and 17481 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:03,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:05:03,431 INFO L93 Difference]: Finished difference Result 7750 states and 19446 transitions. [2021-06-05 21:05:03,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:05:03,431 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 21:05:03,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:05:03,439 INFO L225 Difference]: With dead ends: 7750 [2021-06-05 21:05:03,439 INFO L226 Difference]: Without dead ends: 7723 [2021-06-05 21:05:03,439 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 88.2ms TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:05:03,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7723 states. [2021-06-05 21:05:03,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7723 to 6635. [2021-06-05 21:05:03,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6635 states, 6634 states have (on average 2.6341573711184805) internal successors, (17475), 6634 states have internal predecessors, (17475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:03,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6635 states to 6635 states and 17475 transitions. [2021-06-05 21:05:03,529 INFO L78 Accepts]: Start accepts. Automaton has 6635 states and 17475 transitions. Word has length 47 [2021-06-05 21:05:03,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:05:03,529 INFO L482 AbstractCegarLoop]: Abstraction has 6635 states and 17475 transitions. [2021-06-05 21:05:03,529 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:03,529 INFO L276 IsEmpty]: Start isEmpty. Operand 6635 states and 17475 transitions. [2021-06-05 21:05:03,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 21:05:03,534 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:05:03,534 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:05:03,734 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable403,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:05:03,734 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:05:03,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:05:03,735 INFO L82 PathProgramCache]: Analyzing trace with hash 890204437, now seen corresponding path program 50 times [2021-06-05 21:05:03,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:05:03,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316647464] [2021-06-05 21:05:03,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:05:03,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:05:03,806 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 87 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:05:03,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:05:03,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316647464] [2021-06-05 21:05:03,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316647464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:03,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367384910] [2021-06-05 21:05:03,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:05:03,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:05:03,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:05:03,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:05:03,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:05:03,900 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 88 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:05:03,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367384910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:03,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:05:03,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 21:05:03,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454287242] [2021-06-05 21:05:03,900 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:05:03,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:05:03,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:05:03,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:05:03,901 INFO L87 Difference]: Start difference. First operand 6635 states and 17475 transitions. Second operand has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:04,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:05:04,214 INFO L93 Difference]: Finished difference Result 7795 states and 19769 transitions. [2021-06-05 21:05:04,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:05:04,215 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 21:05:04,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:05:04,223 INFO L225 Difference]: With dead ends: 7795 [2021-06-05 21:05:04,223 INFO L226 Difference]: Without dead ends: 7771 [2021-06-05 21:05:04,223 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 102.2ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:05:04,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7771 states. [2021-06-05 21:05:04,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7771 to 6763. [2021-06-05 21:05:04,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6763 states, 6762 states have (on average 2.6302868973676428) internal successors, (17786), 6762 states have internal predecessors, (17786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:04,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6763 states to 6763 states and 17786 transitions. [2021-06-05 21:05:04,305 INFO L78 Accepts]: Start accepts. Automaton has 6763 states and 17786 transitions. Word has length 47 [2021-06-05 21:05:04,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:05:04,306 INFO L482 AbstractCegarLoop]: Abstraction has 6763 states and 17786 transitions. [2021-06-05 21:05:04,306 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:04,306 INFO L276 IsEmpty]: Start isEmpty. Operand 6763 states and 17786 transitions. [2021-06-05 21:05:04,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 21:05:04,311 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:05:04,311 INFO L554 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:05:04,511 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable408 [2021-06-05 21:05:04,511 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:05:04,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:05:04,511 INFO L82 PathProgramCache]: Analyzing trace with hash -663492420, now seen corresponding path program 109 times [2021-06-05 21:05:04,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:05:04,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291361339] [2021-06-05 21:05:04,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:05:04,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:05:04,566 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 37 proven. 57 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:05:04,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:05:04,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291361339] [2021-06-05 21:05:04,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291361339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:04,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413737530] [2021-06-05 21:05:04,566 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:05:04,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:05:04,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 21:05:04,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:05:04,658 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 37 proven. 57 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:05:04,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413737530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:04,659 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:05:04,659 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 21:05:04,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046793833] [2021-06-05 21:05:04,659 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:05:04,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:05:04,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:05:04,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:05:04,659 INFO L87 Difference]: Start difference. First operand 6763 states and 17786 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:04,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:05:04,808 INFO L93 Difference]: Finished difference Result 8122 states and 20221 transitions. [2021-06-05 21:05:04,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:05:04,809 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 21:05:04,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:05:04,816 INFO L225 Difference]: With dead ends: 8122 [2021-06-05 21:05:04,817 INFO L226 Difference]: Without dead ends: 8119 [2021-06-05 21:05:04,817 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 45.1ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:05:04,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8119 states. [2021-06-05 21:05:04,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8119 to 6755. [2021-06-05 21:05:04,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6755 states, 6754 states have (on average 2.628368374296713) internal successors, (17752), 6754 states have internal predecessors, (17752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:04,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6755 states to 6755 states and 17752 transitions. [2021-06-05 21:05:04,908 INFO L78 Accepts]: Start accepts. Automaton has 6755 states and 17752 transitions. Word has length 47 [2021-06-05 21:05:04,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:05:04,908 INFO L482 AbstractCegarLoop]: Abstraction has 6755 states and 17752 transitions. [2021-06-05 21:05:04,908 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:04,908 INFO L276 IsEmpty]: Start isEmpty. Operand 6755 states and 17752 transitions. [2021-06-05 21:05:04,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 21:05:04,913 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:05:04,913 INFO L554 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:05:05,114 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable409,210 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:05:05,114 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:05:05,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:05:05,114 INFO L82 PathProgramCache]: Analyzing trace with hash -456429854, now seen corresponding path program 110 times [2021-06-05 21:05:05,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:05:05,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657059743] [2021-06-05 21:05:05,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:05:05,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:05:05,173 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 32 proven. 62 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:05:05,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:05:05,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657059743] [2021-06-05 21:05:05,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657059743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:05,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109883156] [2021-06-05 21:05:05,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:05:05,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:05:05,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:05:05,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 21:05:05,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:05:05,291 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 32 proven. 62 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:05:05,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109883156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:05,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:05:05,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 21:05:05,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682559809] [2021-06-05 21:05:05,292 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:05:05,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:05:05,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:05:05,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:05:05,293 INFO L87 Difference]: Start difference. First operand 6755 states and 17752 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:05,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:05:05,462 INFO L93 Difference]: Finished difference Result 8150 states and 20236 transitions. [2021-06-05 21:05:05,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:05:05,463 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 21:05:05,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:05:05,473 INFO L225 Difference]: With dead ends: 8150 [2021-06-05 21:05:05,473 INFO L226 Difference]: Without dead ends: 8132 [2021-06-05 21:05:05,473 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 67.2ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:05:05,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8132 states. [2021-06-05 21:05:05,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8132 to 6755. [2021-06-05 21:05:05,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6755 states, 6754 states have (on average 2.6254071661237783) internal successors, (17732), 6754 states have internal predecessors, (17732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:05,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6755 states to 6755 states and 17732 transitions. [2021-06-05 21:05:05,569 INFO L78 Accepts]: Start accepts. Automaton has 6755 states and 17732 transitions. Word has length 47 [2021-06-05 21:05:05,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:05:05,569 INFO L482 AbstractCegarLoop]: Abstraction has 6755 states and 17732 transitions. [2021-06-05 21:05:05,569 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:05,570 INFO L276 IsEmpty]: Start isEmpty. Operand 6755 states and 17732 transitions. [2021-06-05 21:05:05,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 21:05:05,574 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:05:05,574 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:05:05,774 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 211 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable411 [2021-06-05 21:05:05,775 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:05:05,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:05:05,775 INFO L82 PathProgramCache]: Analyzing trace with hash -1904429867, now seen corresponding path program 111 times [2021-06-05 21:05:05,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:05:05,775 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605455269] [2021-06-05 21:05:05,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:05:05,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:05:05,840 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 16 proven. 78 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:05:05,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:05:05,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605455269] [2021-06-05 21:05:05,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605455269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:05,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850753775] [2021-06-05 21:05:05,840 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:05:05,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-06-05 21:05:05,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:05:05,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:05:05,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:05:05,948 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 83 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:05:05,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850753775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:05,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:05:05,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 21:05:05,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052593781] [2021-06-05 21:05:05,949 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:05:05,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:05:05,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:05:05,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:05:05,949 INFO L87 Difference]: Start difference. First operand 6755 states and 17732 transitions. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:06,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:05:06,413 INFO L93 Difference]: Finished difference Result 7412 states and 18888 transitions. [2021-06-05 21:05:06,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:05:06,414 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 21:05:06,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:05:06,421 INFO L225 Difference]: With dead ends: 7412 [2021-06-05 21:05:06,421 INFO L226 Difference]: Without dead ends: 7338 [2021-06-05 21:05:06,421 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 100.8ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:05:06,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7338 states. [2021-06-05 21:05:06,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7338 to 6729. [2021-06-05 21:05:06,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6729 states, 6728 states have (on average 2.6211355529131986) internal successors, (17635), 6728 states have internal predecessors, (17635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:06,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6729 states to 6729 states and 17635 transitions. [2021-06-05 21:05:06,507 INFO L78 Accepts]: Start accepts. Automaton has 6729 states and 17635 transitions. Word has length 47 [2021-06-05 21:05:06,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:05:06,507 INFO L482 AbstractCegarLoop]: Abstraction has 6729 states and 17635 transitions. [2021-06-05 21:05:06,507 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:06,507 INFO L276 IsEmpty]: Start isEmpty. Operand 6729 states and 17635 transitions. [2021-06-05 21:05:06,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 21:05:06,511 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:05:06,511 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:05:06,711 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable414 [2021-06-05 21:05:06,712 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:05:06,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:05:06,712 INFO L82 PathProgramCache]: Analyzing trace with hash 1777001249, now seen corresponding path program 112 times [2021-06-05 21:05:06,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:05:06,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094920102] [2021-06-05 21:05:06,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:05:06,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:05:06,783 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 79 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:05:06,783 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:05:06,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094920102] [2021-06-05 21:05:06,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094920102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:06,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842241429] [2021-06-05 21:05:06,784 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:05:06,808 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:05:06,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:05:06,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:05:06,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:05:06,878 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 80 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:05:06,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842241429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:06,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:05:06,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 21:05:06,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002843157] [2021-06-05 21:05:06,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:05:06,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:05:06,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:05:06,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:05:06,879 INFO L87 Difference]: Start difference. First operand 6729 states and 17635 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:07,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:05:07,219 INFO L93 Difference]: Finished difference Result 7761 states and 19651 transitions. [2021-06-05 21:05:07,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:05:07,219 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 21:05:07,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:05:07,227 INFO L225 Difference]: With dead ends: 7761 [2021-06-05 21:05:07,227 INFO L226 Difference]: Without dead ends: 7749 [2021-06-05 21:05:07,227 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 103.3ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:05:07,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7749 states. [2021-06-05 21:05:07,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7749 to 6765. [2021-06-05 21:05:07,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6765 states, 6764 states have (on average 2.6197516262566527) internal successors, (17720), 6764 states have internal predecessors, (17720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:07,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6765 states to 6765 states and 17720 transitions. [2021-06-05 21:05:07,308 INFO L78 Accepts]: Start accepts. Automaton has 6765 states and 17720 transitions. Word has length 47 [2021-06-05 21:05:07,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:05:07,308 INFO L482 AbstractCegarLoop]: Abstraction has 6765 states and 17720 transitions. [2021-06-05 21:05:07,309 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) [2021-06-05 21:05:07,309 INFO L276 IsEmpty]: Start isEmpty. Operand 6765 states and 17720 transitions. [2021-06-05 21:05:07,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 21:05:07,313 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:05:07,313 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:05:07,514 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable415,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:05:07,514 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:05:07,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:05:07,515 INFO L82 PathProgramCache]: Analyzing trace with hash -376048713, now seen corresponding path program 113 times [2021-06-05 21:05:07,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:05:07,515 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779039699] [2021-06-05 21:05:07,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:05:07,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:05:07,584 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 81 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:05:07,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:05:07,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779039699] [2021-06-05 21:05:07,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779039699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:07,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319039451] [2021-06-05 21:05:07,585 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:05:07,612 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-06-05 21:05:07,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:05:07,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:05:07,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:05:07,679 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 82 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:05:07,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319039451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:07,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:05:07,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 21:05:07,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911740013] [2021-06-05 21:05:07,680 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:05:07,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:05:07,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:05:07,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:05:07,680 INFO L87 Difference]: Start difference. First operand 6765 states and 17720 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:08,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:05:08,134 INFO L93 Difference]: Finished difference Result 8961 states and 22249 transitions. [2021-06-05 21:05:08,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:05:08,134 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 21:05:08,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:05:08,144 INFO L225 Difference]: With dead ends: 8961 [2021-06-05 21:05:08,144 INFO L226 Difference]: Without dead ends: 8907 [2021-06-05 21:05:08,145 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 159.1ms TimeCoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:05:08,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8907 states. [2021-06-05 21:05:08,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8907 to 6885. [2021-06-05 21:05:08,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6885 states, 6884 states have (on average 2.6198431144683325) internal successors, (18035), 6884 states have internal predecessors, (18035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:08,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6885 states to 6885 states and 18035 transitions. [2021-06-05 21:05:08,239 INFO L78 Accepts]: Start accepts. Automaton has 6885 states and 18035 transitions. Word has length 47 [2021-06-05 21:05:08,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:05:08,240 INFO L482 AbstractCegarLoop]: Abstraction has 6885 states and 18035 transitions. [2021-06-05 21:05:08,240 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:08,240 INFO L276 IsEmpty]: Start isEmpty. Operand 6885 states and 18035 transitions. [2021-06-05 21:05:08,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 21:05:08,244 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:05:08,244 INFO L554 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:05:08,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable416,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:05:08,444 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:05:08,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:05:08,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1156510396, now seen corresponding path program 114 times [2021-06-05 21:05:08,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:05:08,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256571819] [2021-06-05 21:05:08,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:05:08,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:05:08,501 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 27 proven. 70 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:05:08,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:05:08,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256571819] [2021-06-05 21:05:08,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256571819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:08,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229771879] [2021-06-05 21:05:08,501 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:05:08,527 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 21:05:08,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:05:08,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 21:05:08,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:05:08,591 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 27 proven. 70 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:05:08,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229771879] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:08,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:05:08,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 21:05:08,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768403386] [2021-06-05 21:05:08,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:05:08,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:05:08,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:05:08,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:05:08,592 INFO L87 Difference]: Start difference. First operand 6885 states and 18035 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:08,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:05:08,769 INFO L93 Difference]: Finished difference Result 8306 states and 20557 transitions. [2021-06-05 21:05:08,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:05:08,769 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 21:05:08,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:05:08,777 INFO L225 Difference]: With dead ends: 8306 [2021-06-05 21:05:08,777 INFO L226 Difference]: Without dead ends: 8282 [2021-06-05 21:05:08,777 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 68.5ms TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:05:08,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8282 states. [2021-06-05 21:05:08,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8282 to 6885. [2021-06-05 21:05:08,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6885 states, 6884 states have (on average 2.6178094131319) internal successors, (18021), 6884 states have internal predecessors, (18021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:08,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6885 states to 6885 states and 18021 transitions. [2021-06-05 21:05:08,868 INFO L78 Accepts]: Start accepts. Automaton has 6885 states and 18021 transitions. Word has length 47 [2021-06-05 21:05:08,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:05:08,868 INFO L482 AbstractCegarLoop]: Abstraction has 6885 states and 18021 transitions. [2021-06-05 21:05:08,868 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:08,868 INFO L276 IsEmpty]: Start isEmpty. Operand 6885 states and 18021 transitions. [2021-06-05 21:05:08,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 21:05:08,873 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:05:08,873 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:05:09,073 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable417,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:05:09,073 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:05:09,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:05:09,074 INFO L82 PathProgramCache]: Analyzing trace with hash -221212179, now seen corresponding path program 115 times [2021-06-05 21:05:09,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:05:09,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838854549] [2021-06-05 21:05:09,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:05:09,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:05:09,158 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 81 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:05:09,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:05:09,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838854549] [2021-06-05 21:05:09,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838854549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:09,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75208564] [2021-06-05 21:05:09,159 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:05:09,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:05:09,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:05:09,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:05:09,250 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 82 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:05:09,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75208564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:09,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:05:09,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 21:05:09,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725499067] [2021-06-05 21:05:09,251 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:05:09,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:05:09,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:05:09,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:05:09,251 INFO L87 Difference]: Start difference. First operand 6885 states and 18021 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:09,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:05:09,857 INFO L93 Difference]: Finished difference Result 10707 states and 26088 transitions. [2021-06-05 21:05:09,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 21:05:09,857 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 21:05:09,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:05:09,869 INFO L225 Difference]: With dead ends: 10707 [2021-06-05 21:05:09,869 INFO L226 Difference]: Without dead ends: 10593 [2021-06-05 21:05:09,869 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 281.4ms TimeCoverageRelationStatistics Valid=171, Invalid=1019, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 21:05:09,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10593 states. [2021-06-05 21:05:09,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10593 to 7009. [2021-06-05 21:05:09,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7009 states, 7008 states have (on average 2.617865296803653) internal successors, (18346), 7008 states have internal predecessors, (18346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:09,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7009 states to 7009 states and 18346 transitions. [2021-06-05 21:05:09,976 INFO L78 Accepts]: Start accepts. Automaton has 7009 states and 18346 transitions. Word has length 47 [2021-06-05 21:05:09,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:05:09,976 INFO L482 AbstractCegarLoop]: Abstraction has 7009 states and 18346 transitions. [2021-06-05 21:05:09,976 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:09,976 INFO L276 IsEmpty]: Start isEmpty. Operand 7009 states and 18346 transitions. [2021-06-05 21:05:09,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 21:05:09,981 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:05:09,981 INFO L554 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:05:10,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable421 [2021-06-05 21:05:10,181 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:05:10,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:05:10,181 INFO L82 PathProgramCache]: Analyzing trace with hash 165390498, now seen corresponding path program 116 times [2021-06-05 21:05:10,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:05:10,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136711330] [2021-06-05 21:05:10,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:05:10,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:05:10,249 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 28 proven. 69 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:05:10,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:05:10,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136711330] [2021-06-05 21:05:10,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136711330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:10,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804387222] [2021-06-05 21:05:10,249 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 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:05:10,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:05:10,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:05:10,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 21:05:10,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:05:10,340 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 28 proven. 69 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:05:10,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804387222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:10,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:05:10,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 21:05:10,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952344328] [2021-06-05 21:05:10,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:05:10,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:05:10,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:05:10,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:05:10,341 INFO L87 Difference]: Start difference. First operand 7009 states and 18346 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:10,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:05:10,536 INFO L93 Difference]: Finished difference Result 8467 states and 20934 transitions. [2021-06-05 21:05:10,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:05:10,536 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 21:05:10,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:05:10,545 INFO L225 Difference]: With dead ends: 8467 [2021-06-05 21:05:10,545 INFO L226 Difference]: Without dead ends: 8434 [2021-06-05 21:05:10,545 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 87.0ms TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:05:10,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8434 states. [2021-06-05 21:05:10,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8434 to 6781. [2021-06-05 21:05:10,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6781 states, 6780 states have (on average 2.6073746312684367) internal successors, (17678), 6780 states have internal predecessors, (17678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:10,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6781 states to 6781 states and 17678 transitions. [2021-06-05 21:05:10,663 INFO L78 Accepts]: Start accepts. Automaton has 6781 states and 17678 transitions. Word has length 47 [2021-06-05 21:05:10,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:05:10,664 INFO L482 AbstractCegarLoop]: Abstraction has 6781 states and 17678 transitions. [2021-06-05 21:05:10,664 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:10,664 INFO L276 IsEmpty]: Start isEmpty. Operand 6781 states and 17678 transitions. [2021-06-05 21:05:10,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 21:05:10,668 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:05:10,668 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:05:10,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable422 [2021-06-05 21:05:10,869 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:05:10,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:05:10,869 INFO L82 PathProgramCache]: Analyzing trace with hash -280903689, now seen corresponding path program 117 times [2021-06-05 21:05:10,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:05:10,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443766027] [2021-06-05 21:05:10,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:05:10,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:05:10,954 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:05:10,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:05:10,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443766027] [2021-06-05 21:05:10,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443766027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:10,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055066449] [2021-06-05 21:05:10,954 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:05:10,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-06-05 21:05:10,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:05:10,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:05:10,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:05:11,054 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:05:11,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055066449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:11,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:05:11,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:05:11,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629050624] [2021-06-05 21:05:11,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:05:11,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:05:11,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:05:11,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:05:11,055 INFO L87 Difference]: Start difference. First operand 6781 states and 17678 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:11,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:05:11,561 INFO L93 Difference]: Finished difference Result 9528 states and 23213 transitions. [2021-06-05 21:05:11,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:05:11,561 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 21:05:11,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:05:11,571 INFO L225 Difference]: With dead ends: 9528 [2021-06-05 21:05:11,571 INFO L226 Difference]: Without dead ends: 9372 [2021-06-05 21:05:11,571 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 194.1ms TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:05:11,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9372 states. [2021-06-05 21:05:11,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9372 to 6516. [2021-06-05 21:05:11,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6516 states, 6515 states have (on average 2.6015349194167308) internal successors, (16949), 6515 states have internal predecessors, (16949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:11,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6516 states to 6516 states and 16949 transitions. [2021-06-05 21:05:11,662 INFO L78 Accepts]: Start accepts. Automaton has 6516 states and 16949 transitions. Word has length 47 [2021-06-05 21:05:11,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:05:11,663 INFO L482 AbstractCegarLoop]: Abstraction has 6516 states and 16949 transitions. [2021-06-05 21:05:11,663 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:11,663 INFO L276 IsEmpty]: Start isEmpty. Operand 6516 states and 16949 transitions. [2021-06-05 21:05:11,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 21:05:11,668 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:05:11,668 INFO L554 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:05:11,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable427,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:05:11,869 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:05:11,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:05:11,869 INFO L82 PathProgramCache]: Analyzing trace with hash -518965206, now seen corresponding path program 51 times [2021-06-05 21:05:11,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:05:11,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198060672] [2021-06-05 21:05:11,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:05:11,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:05:11,917 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 77 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:05:11,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:05:11,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198060672] [2021-06-05 21:05:11,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198060672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:11,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391786376] [2021-06-05 21:05:11,918 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 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:05:11,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-06-05 21:05:11,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:05:11,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 21:05:11,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:05:12,020 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 78 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:05:12,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391786376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:12,020 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:05:12,020 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 10 [2021-06-05 21:05:12,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335386431] [2021-06-05 21:05:12,020 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:05:12,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:05:12,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:05:12,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:05:12,021 INFO L87 Difference]: Start difference. First operand 6516 states and 16949 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:12,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:05:12,200 INFO L93 Difference]: Finished difference Result 8372 states and 20874 transitions. [2021-06-05 21:05:12,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:05:12,200 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 21:05:12,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:05:12,209 INFO L225 Difference]: With dead ends: 8372 [2021-06-05 21:05:12,209 INFO L226 Difference]: Without dead ends: 8356 [2021-06-05 21:05:12,209 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 56.5ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:05:12,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8356 states. [2021-06-05 21:05:12,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8356 to 6760. [2021-06-05 21:05:12,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6760 states, 6759 states have (on average 2.6057109039798787) internal successors, (17612), 6759 states have internal predecessors, (17612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:12,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6760 states to 6760 states and 17612 transitions. [2021-06-05 21:05:12,295 INFO L78 Accepts]: Start accepts. Automaton has 6760 states and 17612 transitions. Word has length 47 [2021-06-05 21:05:12,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:05:12,295 INFO L482 AbstractCegarLoop]: Abstraction has 6760 states and 17612 transitions. [2021-06-05 21:05:12,295 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:12,295 INFO L276 IsEmpty]: Start isEmpty. Operand 6760 states and 17612 transitions. [2021-06-05 21:05:12,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 21:05:12,300 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:05:12,300 INFO L554 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:05:12,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable428 [2021-06-05 21:05:12,501 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:05:12,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:05:12,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1140845616, now seen corresponding path program 52 times [2021-06-05 21:05:12,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:05:12,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74252583] [2021-06-05 21:05:12,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:05:12,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:05:12,550 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 77 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:05:12,550 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:05:12,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74252583] [2021-06-05 21:05:12,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74252583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:12,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187071498] [2021-06-05 21:05:12,550 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:05:12,574 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:05:12,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:05:12,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 21:05:12,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:05:12,646 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 78 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:05:12,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187071498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:12,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:05:12,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 10 [2021-06-05 21:05:12,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756814080] [2021-06-05 21:05:12,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:05:12,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:05:12,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:05:12,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:05:12,647 INFO L87 Difference]: Start difference. First operand 6760 states and 17612 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:12,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:05:12,856 INFO L93 Difference]: Finished difference Result 10200 states and 25050 transitions. [2021-06-05 21:05:12,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:05:12,856 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 21:05:12,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:05:12,868 INFO L225 Difference]: With dead ends: 10200 [2021-06-05 21:05:12,868 INFO L226 Difference]: Without dead ends: 10200 [2021-06-05 21:05:12,868 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 75.4ms TimeCoverageRelationStatistics Valid=89, Invalid=121, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:05:12,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10200 states. [2021-06-05 21:05:12,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10200 to 6771. [2021-06-05 21:05:12,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6771 states, 6770 states have (on average 2.606351550960118) internal successors, (17645), 6770 states have internal predecessors, (17645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:12,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6771 states to 6771 states and 17645 transitions. [2021-06-05 21:05:12,967 INFO L78 Accepts]: Start accepts. Automaton has 6771 states and 17645 transitions. Word has length 47 [2021-06-05 21:05:12,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:05:12,967 INFO L482 AbstractCegarLoop]: Abstraction has 6771 states and 17645 transitions. [2021-06-05 21:05:12,967 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:12,967 INFO L276 IsEmpty]: Start isEmpty. Operand 6771 states and 17645 transitions. [2021-06-05 21:05:12,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 21:05:12,972 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:05:12,972 INFO L554 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:05:13,173 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable430 [2021-06-05 21:05:13,173 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:05:13,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:05:13,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1516549224, now seen corresponding path program 53 times [2021-06-05 21:05:13,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:05:13,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058806419] [2021-06-05 21:05:13,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:05:13,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:05:13,232 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 76 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:05:13,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:05:13,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058806419] [2021-06-05 21:05:13,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058806419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:13,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237263959] [2021-06-05 21:05:13,232 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:05:13,260 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-05 21:05:13,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:05:13,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 21:05:13,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:05:13,404 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 78 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:05:13,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237263959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:13,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:05:13,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 16] total 19 [2021-06-05 21:05:13,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475090752] [2021-06-05 21:05:13,405 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 21:05:13,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:05:13,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 21:05:13,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=254, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:05:13,405 INFO L87 Difference]: Start difference. First operand 6771 states and 17645 transitions. Second operand has 20 states, 20 states have (on average 3.45) internal successors, (69), 19 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:13,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:05:13,890 INFO L93 Difference]: Finished difference Result 11339 states and 27631 transitions. [2021-06-05 21:05:13,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:05:13,890 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.45) internal successors, (69), 19 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 21:05:13,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:05:13,905 INFO L225 Difference]: With dead ends: 11339 [2021-06-05 21:05:13,905 INFO L226 Difference]: Without dead ends: 11339 [2021-06-05 21:05:13,905 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 285.6ms TimeCoverageRelationStatistics Valid=369, Invalid=623, Unknown=0, NotChecked=0, Total=992 [2021-06-05 21:05:13,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11339 states. [2021-06-05 21:05:14,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11339 to 6800. [2021-06-05 21:05:14,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6800 states, 6799 states have (on average 2.6087659949992648) internal successors, (17737), 6799 states have internal predecessors, (17737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:14,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6800 states to 6800 states and 17737 transitions. [2021-06-05 21:05:14,016 INFO L78 Accepts]: Start accepts. Automaton has 6800 states and 17737 transitions. Word has length 47 [2021-06-05 21:05:14,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:05:14,016 INFO L482 AbstractCegarLoop]: Abstraction has 6800 states and 17737 transitions. [2021-06-05 21:05:14,016 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.45) internal successors, (69), 19 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:14,016 INFO L276 IsEmpty]: Start isEmpty. Operand 6800 states and 17737 transitions. [2021-06-05 21:05:14,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 21:05:14,021 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:05:14,021 INFO L554 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:05:14,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable431,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:05:14,225 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:05:14,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:05:14,225 INFO L82 PathProgramCache]: Analyzing trace with hash -173445940, now seen corresponding path program 54 times [2021-06-05 21:05:14,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:05:14,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140746657] [2021-06-05 21:05:14,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:05:14,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:05:14,292 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 69 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:05:14,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:05:14,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140746657] [2021-06-05 21:05:14,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140746657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:14,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54732834] [2021-06-05 21:05:14,293 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:05:14,321 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-05 21:05:14,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:05:14,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 21:05:14,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:05:14,393 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 70 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:05:14,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54732834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:14,393 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:05:14,393 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 12 [2021-06-05 21:05:14,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030877864] [2021-06-05 21:05:14,393 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:05:14,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:05:14,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:05:14,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:05:14,394 INFO L87 Difference]: Start difference. First operand 6800 states and 17737 transitions. Second operand has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:14,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:05:14,675 INFO L93 Difference]: Finished difference Result 10003 states and 24584 transitions. [2021-06-05 21:05:14,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:05:14,676 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 21:05:14,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:05:14,686 INFO L225 Difference]: With dead ends: 10003 [2021-06-05 21:05:14,687 INFO L226 Difference]: Without dead ends: 10003 [2021-06-05 21:05:14,687 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 128.8ms TimeCoverageRelationStatistics Valid=163, Invalid=257, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:05:14,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10003 states. [2021-06-05 21:05:14,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10003 to 6809. [2021-06-05 21:05:14,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6809 states, 6808 states have (on average 2.608548766157462) internal successors, (17759), 6808 states have internal predecessors, (17759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:14,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6809 states to 6809 states and 17759 transitions. [2021-06-05 21:05:14,786 INFO L78 Accepts]: Start accepts. Automaton has 6809 states and 17759 transitions. Word has length 47 [2021-06-05 21:05:14,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:05:14,786 INFO L482 AbstractCegarLoop]: Abstraction has 6809 states and 17759 transitions. [2021-06-05 21:05:14,786 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:14,786 INFO L276 IsEmpty]: Start isEmpty. Operand 6809 states and 17759 transitions. [2021-06-05 21:05:14,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 21:05:14,790 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:05:14,790 INFO L554 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:05:14,991 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable432 [2021-06-05 21:05:14,991 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:05:14,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:05:14,991 INFO L82 PathProgramCache]: Analyzing trace with hash -1212732952, now seen corresponding path program 55 times [2021-06-05 21:05:14,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:05:14,991 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188946782] [2021-06-05 21:05:14,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:05:14,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:05:15,068 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 62 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:05:15,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:05:15,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188946782] [2021-06-05 21:05:15,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188946782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:15,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351342722] [2021-06-05 21:05:15,069 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:05:15,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:05:15,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 21:05:15,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:05:15,166 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 63 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:05:15,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351342722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:15,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:05:15,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-06-05 21:05:15,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473097954] [2021-06-05 21:05:15,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:05:15,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:05:15,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:05:15,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:05:15,167 INFO L87 Difference]: Start difference. First operand 6809 states and 17759 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:15,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:05:15,462 INFO L93 Difference]: Finished difference Result 8634 states and 21474 transitions. [2021-06-05 21:05:15,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:05:15,462 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 21:05:15,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:05:15,471 INFO L225 Difference]: With dead ends: 8634 [2021-06-05 21:05:15,471 INFO L226 Difference]: Without dead ends: 8634 [2021-06-05 21:05:15,471 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 133.4ms TimeCoverageRelationStatistics Valid=155, Invalid=265, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:05:15,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8634 states. [2021-06-05 21:05:15,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8634 to 6442. [2021-06-05 21:05:15,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6442 states, 6441 states have (on average 2.6028566992702995) internal successors, (16765), 6441 states have internal predecessors, (16765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:15,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6442 states to 6442 states and 16765 transitions. [2021-06-05 21:05:15,559 INFO L78 Accepts]: Start accepts. Automaton has 6442 states and 16765 transitions. Word has length 47 [2021-06-05 21:05:15,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:05:15,559 INFO L482 AbstractCegarLoop]: Abstraction has 6442 states and 16765 transitions. [2021-06-05 21:05:15,559 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:15,559 INFO L276 IsEmpty]: Start isEmpty. Operand 6442 states and 16765 transitions. [2021-06-05 21:05:15,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 21:05:15,563 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:05:15,563 INFO L554 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:05:15,763 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 223 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable433 [2021-06-05 21:05:15,764 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:05:15,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:05:15,764 INFO L82 PathProgramCache]: Analyzing trace with hash 1612669180, now seen corresponding path program 118 times [2021-06-05 21:05:15,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:05:15,764 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891601229] [2021-06-05 21:05:15,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:05:15,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:05:15,839 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:05:15,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:05:15,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891601229] [2021-06-05 21:05:15,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891601229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:15,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780003270] [2021-06-05 21:05:15,839 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:05:15,864 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:05:15,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:05:15,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 21:05:15,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:05:15,938 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:05:15,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780003270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:15,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:05:15,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-05 21:05:15,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800711110] [2021-06-05 21:05:15,939 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:05:15,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:05:15,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:05:15,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:05:15,939 INFO L87 Difference]: Start difference. First operand 6442 states and 16765 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:16,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:05:16,146 INFO L93 Difference]: Finished difference Result 7636 states and 18887 transitions. [2021-06-05 21:05:16,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:05:16,146 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 21:05:16,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:05:16,153 INFO L225 Difference]: With dead ends: 7636 [2021-06-05 21:05:16,153 INFO L226 Difference]: Without dead ends: 7600 [2021-06-05 21:05:16,153 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 105.5ms TimeCoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:05:16,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7600 states. [2021-06-05 21:05:16,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7600 to 6442. [2021-06-05 21:05:16,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6442 states, 6441 states have (on average 2.60192516689955) internal successors, (16759), 6441 states have internal predecessors, (16759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:16,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6442 states to 6442 states and 16759 transitions. [2021-06-05 21:05:16,233 INFO L78 Accepts]: Start accepts. Automaton has 6442 states and 16759 transitions. Word has length 47 [2021-06-05 21:05:16,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:05:16,234 INFO L482 AbstractCegarLoop]: Abstraction has 6442 states and 16759 transitions. [2021-06-05 21:05:16,234 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:16,234 INFO L276 IsEmpty]: Start isEmpty. Operand 6442 states and 16759 transitions. [2021-06-05 21:05:16,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 21:05:16,238 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:05:16,238 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:05:16,438 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable434 [2021-06-05 21:05:16,439 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:05:16,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:05:16,439 INFO L82 PathProgramCache]: Analyzing trace with hash -2022814789, now seen corresponding path program 56 times [2021-06-05 21:05:16,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:05:16,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68357713] [2021-06-05 21:05:16,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:05:16,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:05:16,509 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 87 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:05:16,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:05:16,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68357713] [2021-06-05 21:05:16,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68357713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:16,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277682887] [2021-06-05 21:05:16,510 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:05:16,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:05:16,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:05:16,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:05:16,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:05:16,633 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 88 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:05:16,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277682887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:16,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:05:16,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 21:05:16,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949763151] [2021-06-05 21:05:16,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:05:16,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:05:16,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:05:16,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:05:16,634 INFO L87 Difference]: Start difference. First operand 6442 states and 16759 transitions. Second operand has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:16,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:05:16,961 INFO L93 Difference]: Finished difference Result 7550 states and 18942 transitions. [2021-06-05 21:05:16,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:05:16,961 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 21:05:16,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:05:16,969 INFO L225 Difference]: With dead ends: 7550 [2021-06-05 21:05:16,969 INFO L226 Difference]: Without dead ends: 7535 [2021-06-05 21:05:16,969 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 102.4ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:05:16,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7535 states. [2021-06-05 21:05:17,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7535 to 6598. [2021-06-05 21:05:17,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6598 states, 6597 states have (on average 2.5970895861755343) internal successors, (17133), 6597 states have internal predecessors, (17133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:17,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6598 states to 6598 states and 17133 transitions. [2021-06-05 21:05:17,054 INFO L78 Accepts]: Start accepts. Automaton has 6598 states and 17133 transitions. Word has length 47 [2021-06-05 21:05:17,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:05:17,054 INFO L482 AbstractCegarLoop]: Abstraction has 6598 states and 17133 transitions. [2021-06-05 21:05:17,054 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:17,054 INFO L276 IsEmpty]: Start isEmpty. Operand 6598 states and 17133 transitions. [2021-06-05 21:05:17,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 21:05:17,059 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:05:17,059 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:05:17,259 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable440,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:05:17,260 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:05:17,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:05:17,260 INFO L82 PathProgramCache]: Analyzing trace with hash -522481797, now seen corresponding path program 119 times [2021-06-05 21:05:17,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:05:17,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393453444] [2021-06-05 21:05:17,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:05:17,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:05:17,323 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 16 proven. 78 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:05:17,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:05:17,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393453444] [2021-06-05 21:05:17,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393453444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:17,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276852057] [2021-06-05 21:05:17,323 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:05:17,351 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-05 21:05:17,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:05:17,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:05:17,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:05:17,428 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 83 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:05:17,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276852057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:17,429 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:05:17,429 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 21:05:17,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165941282] [2021-06-05 21:05:17,429 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:05:17,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:05:17,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:05:17,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:05:17,429 INFO L87 Difference]: Start difference. First operand 6598 states and 17133 transitions. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:17,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:05:17,844 INFO L93 Difference]: Finished difference Result 7269 states and 18302 transitions. [2021-06-05 21:05:17,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:05:17,844 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 21:05:17,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:05:17,852 INFO L225 Difference]: With dead ends: 7269 [2021-06-05 21:05:17,852 INFO L226 Difference]: Without dead ends: 7177 [2021-06-05 21:05:17,852 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 98.8ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:05:17,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7177 states. [2021-06-05 21:05:17,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7177 to 6587. [2021-06-05 21:05:17,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6587 states, 6586 states have (on average 2.5889766170665047) internal successors, (17051), 6586 states have internal predecessors, (17051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:17,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6587 states to 6587 states and 17051 transitions. [2021-06-05 21:05:17,935 INFO L78 Accepts]: Start accepts. Automaton has 6587 states and 17051 transitions. Word has length 47 [2021-06-05 21:05:17,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:05:17,935 INFO L482 AbstractCegarLoop]: Abstraction has 6587 states and 17051 transitions. [2021-06-05 21:05:17,936 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:17,936 INFO L276 IsEmpty]: Start isEmpty. Operand 6587 states and 17051 transitions. [2021-06-05 21:05:17,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 21:05:17,940 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:05:17,940 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:05:18,141 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable441 [2021-06-05 21:05:18,141 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:05:18,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:05:18,141 INFO L82 PathProgramCache]: Analyzing trace with hash -1136017977, now seen corresponding path program 120 times [2021-06-05 21:05:18,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:05:18,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051264751] [2021-06-05 21:05:18,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:05:18,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:05:18,210 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 79 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:05:18,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:05:18,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051264751] [2021-06-05 21:05:18,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051264751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:18,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437522384] [2021-06-05 21:05:18,210 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:05:18,238 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-05 21:05:18,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:05:18,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:05:18,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:05:18,305 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 80 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:05:18,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437522384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:18,305 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:05:18,305 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 21:05:18,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246545141] [2021-06-05 21:05:18,306 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:05:18,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:05:18,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:05:18,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:05:18,306 INFO L87 Difference]: Start difference. First operand 6587 states and 17051 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:18,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:05:18,629 INFO L93 Difference]: Finished difference Result 7638 states and 19101 transitions. [2021-06-05 21:05:18,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:05:18,630 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 21:05:18,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:05:18,637 INFO L225 Difference]: With dead ends: 7638 [2021-06-05 21:05:18,637 INFO L226 Difference]: Without dead ends: 7626 [2021-06-05 21:05:18,637 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 102.2ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:05:18,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7626 states. [2021-06-05 21:05:18,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7626 to 6635. [2021-06-05 21:05:18,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6635 states, 6634 states have (on average 2.588182092252035) internal successors, (17170), 6634 states have internal predecessors, (17170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:18,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6635 states to 6635 states and 17170 transitions. [2021-06-05 21:05:18,721 INFO L78 Accepts]: Start accepts. Automaton has 6635 states and 17170 transitions. Word has length 47 [2021-06-05 21:05:18,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:05:18,721 INFO L482 AbstractCegarLoop]: Abstraction has 6635 states and 17170 transitions. [2021-06-05 21:05:18,721 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) [2021-06-05 21:05:18,721 INFO L276 IsEmpty]: Start isEmpty. Operand 6635 states and 17170 transitions. [2021-06-05 21:05:18,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 21:05:18,725 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:05:18,725 INFO L554 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:05:18,926 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable442 [2021-06-05 21:05:18,926 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:05:18,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:05:18,926 INFO L82 PathProgramCache]: Analyzing trace with hash -1293317464, now seen corresponding path program 57 times [2021-06-05 21:05:18,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:05:18,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735820168] [2021-06-05 21:05:18,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:05:18,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:05:18,986 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 60 proven. 37 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:05:18,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:05:18,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735820168] [2021-06-05 21:05:18,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735820168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:18,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148088248] [2021-06-05 21:05:18,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:05:19,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-06-05 21:05:19,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:05:19,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 21:05:19,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:05:19,082 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 62 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:05:19,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148088248] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:19,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:05:19,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 10 [2021-06-05 21:05:19,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026343986] [2021-06-05 21:05:19,082 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:05:19,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:05:19,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:05:19,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:05:19,082 INFO L87 Difference]: Start difference. First operand 6635 states and 17170 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:19,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:05:19,265 INFO L93 Difference]: Finished difference Result 7955 states and 19893 transitions. [2021-06-05 21:05:19,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:05:19,265 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 21:05:19,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:05:19,272 INFO L225 Difference]: With dead ends: 7955 [2021-06-05 21:05:19,273 INFO L226 Difference]: Without dead ends: 7935 [2021-06-05 21:05:19,273 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 74.6ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:05:19,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7935 states. [2021-06-05 21:05:19,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7935 to 6729. [2021-06-05 21:05:19,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6729 states, 6728 states have (on average 2.581004756242568) internal successors, (17365), 6728 states have internal predecessors, (17365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:19,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6729 states to 6729 states and 17365 transitions. [2021-06-05 21:05:19,359 INFO L78 Accepts]: Start accepts. Automaton has 6729 states and 17365 transitions. Word has length 47 [2021-06-05 21:05:19,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:05:19,359 INFO L482 AbstractCegarLoop]: Abstraction has 6729 states and 17365 transitions. [2021-06-05 21:05:19,359 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:19,359 INFO L276 IsEmpty]: Start isEmpty. Operand 6729 states and 17365 transitions. [2021-06-05 21:05:19,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 21:05:19,364 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:05:19,364 INFO L554 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:05:19,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 228 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable443 [2021-06-05 21:05:19,564 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:05:19,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:05:19,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1510591816, now seen corresponding path program 121 times [2021-06-05 21:05:19,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:05:19,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690205960] [2021-06-05 21:05:19,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:05:19,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:05:19,648 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 31 proven. 65 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:05:19,648 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:05:19,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690205960] [2021-06-05 21:05:19,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690205960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:19,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050046927] [2021-06-05 21:05:19,648 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:05:19,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:05:19,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 21:05:19,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:05:19,736 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 31 proven. 65 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:05:19,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050046927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:19,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:05:19,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 21:05:19,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923934807] [2021-06-05 21:05:19,736 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:05:19,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:05:19,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:05:19,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:05:19,736 INFO L87 Difference]: Start difference. First operand 6729 states and 17365 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:19,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:05:19,886 INFO L93 Difference]: Finished difference Result 8206 states and 20010 transitions. [2021-06-05 21:05:19,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:05:19,886 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 21:05:19,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:05:19,895 INFO L225 Difference]: With dead ends: 8206 [2021-06-05 21:05:19,895 INFO L226 Difference]: Without dead ends: 8188 [2021-06-05 21:05:19,895 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 94.1ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:05:19,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8188 states. [2021-06-05 21:05:19,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8188 to 6724. [2021-06-05 21:05:19,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6724 states, 6723 states have (on average 2.5790569686152014) internal successors, (17339), 6723 states have internal predecessors, (17339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:19,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6724 states to 6724 states and 17339 transitions. [2021-06-05 21:05:19,985 INFO L78 Accepts]: Start accepts. Automaton has 6724 states and 17339 transitions. Word has length 47 [2021-06-05 21:05:19,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:05:19,985 INFO L482 AbstractCegarLoop]: Abstraction has 6724 states and 17339 transitions. [2021-06-05 21:05:19,985 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) [2021-06-05 21:05:19,985 INFO L276 IsEmpty]: Start isEmpty. Operand 6724 states and 17339 transitions. [2021-06-05 21:05:19,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 21:05:19,990 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:05:19,990 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:05:20,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable446 [2021-06-05 21:05:20,197 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:05:20,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:05:20,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1005899357, now seen corresponding path program 122 times [2021-06-05 21:05:20,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:05:20,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167852908] [2021-06-05 21:05:20,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:05:20,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:05:20,263 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 81 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:05:20,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:05:20,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167852908] [2021-06-05 21:05:20,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167852908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:20,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154329177] [2021-06-05 21:05:20,263 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:05:20,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:05:20,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:05:20,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:05:20,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:05:20,356 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 82 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:05:20,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154329177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:20,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:05:20,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 21:05:20,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283981569] [2021-06-05 21:05:20,356 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:05:20,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:05:20,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:05:20,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:05:20,356 INFO L87 Difference]: Start difference. First operand 6724 states and 17339 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:20,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:05:20,830 INFO L93 Difference]: Finished difference Result 8839 states and 21652 transitions. [2021-06-05 21:05:20,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 21:05:20,831 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 21:05:20,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:05:20,841 INFO L225 Difference]: With dead ends: 8839 [2021-06-05 21:05:20,841 INFO L226 Difference]: Without dead ends: 8785 [2021-06-05 21:05:20,841 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 176.2ms TimeCoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:05:20,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8785 states. [2021-06-05 21:05:20,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8785 to 6842. [2021-06-05 21:05:20,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6842 states, 6841 states have (on average 2.579447449203333) internal successors, (17646), 6841 states have internal predecessors, (17646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:20,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6842 states to 6842 states and 17646 transitions. [2021-06-05 21:05:20,934 INFO L78 Accepts]: Start accepts. Automaton has 6842 states and 17646 transitions. Word has length 47 [2021-06-05 21:05:20,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:05:20,935 INFO L482 AbstractCegarLoop]: Abstraction has 6842 states and 17646 transitions. [2021-06-05 21:05:20,935 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:20,935 INFO L276 IsEmpty]: Start isEmpty. Operand 6842 states and 17646 transitions. [2021-06-05 21:05:20,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 21:05:20,939 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:05:20,939 INFO L554 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:05:21,139 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable449,230 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:05:21,140 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:05:21,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:05:21,140 INFO L82 PathProgramCache]: Analyzing trace with hash -1756508830, now seen corresponding path program 123 times [2021-06-05 21:05:21,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:05:21,140 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485546513] [2021-06-05 21:05:21,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:05:21,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:05:21,214 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 28 proven. 69 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:05:21,214 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:05:21,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485546513] [2021-06-05 21:05:21,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485546513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:21,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823620061] [2021-06-05 21:05:21,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:05:21,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 21:05:21,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:05:21,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 21:05:21,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:05:21,318 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 28 proven. 69 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:05:21,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823620061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:21,319 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:05:21,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 21:05:21,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301221840] [2021-06-05 21:05:21,319 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:05:21,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:05:21,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:05:21,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:05:21,319 INFO L87 Difference]: Start difference. First operand 6842 states and 17646 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:21,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:05:21,472 INFO L93 Difference]: Finished difference Result 8382 states and 20407 transitions. [2021-06-05 21:05:21,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:05:21,472 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 21:05:21,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:05:21,481 INFO L225 Difference]: With dead ends: 8382 [2021-06-05 21:05:21,481 INFO L226 Difference]: Without dead ends: 8358 [2021-06-05 21:05:21,481 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 79.1ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:05:21,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8358 states. [2021-06-05 21:05:21,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8358 to 6842. [2021-06-05 21:05:21,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6842 states, 6841 states have (on average 2.5778394971495397) internal successors, (17635), 6841 states have internal predecessors, (17635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:21,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6842 states to 6842 states and 17635 transitions. [2021-06-05 21:05:21,567 INFO L78 Accepts]: Start accepts. Automaton has 6842 states and 17635 transitions. Word has length 47 [2021-06-05 21:05:21,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:05:21,568 INFO L482 AbstractCegarLoop]: Abstraction has 6842 states and 17635 transitions. [2021-06-05 21:05:21,568 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:21,568 INFO L276 IsEmpty]: Start isEmpty. Operand 6842 states and 17635 transitions. [2021-06-05 21:05:21,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 21:05:21,574 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:05:21,574 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:05:21,775 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable450 [2021-06-05 21:05:21,775 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:05:21,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:05:21,775 INFO L82 PathProgramCache]: Analyzing trace with hash 1160735891, now seen corresponding path program 124 times [2021-06-05 21:05:21,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:05:21,776 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935145932] [2021-06-05 21:05:21,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:05:21,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:05:21,853 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 81 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:05:21,853 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:05:21,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935145932] [2021-06-05 21:05:21,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935145932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:21,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036857732] [2021-06-05 21:05:21,853 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:05:21,877 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:05:21,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:05:21,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:05:21,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:05:21,944 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 82 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:05:21,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036857732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:21,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:05:21,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 21:05:21,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555036980] [2021-06-05 21:05:21,945 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:05:21,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:05:21,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:05:21,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:05:21,945 INFO L87 Difference]: Start difference. First operand 6842 states and 17635 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:22,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:05:22,666 INFO L93 Difference]: Finished difference Result 11528 states and 27416 transitions. [2021-06-05 21:05:22,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 21:05:22,666 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 21:05:22,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:05:22,676 INFO L225 Difference]: With dead ends: 11528 [2021-06-05 21:05:22,676 INFO L226 Difference]: Without dead ends: 11348 [2021-06-05 21:05:22,677 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 334.8ms TimeCoverageRelationStatistics Valid=219, Invalid=1421, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 21:05:22,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11348 states. [2021-06-05 21:05:22,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11348 to 7099. [2021-06-05 21:05:22,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7099 states, 7098 states have (on average 2.5736827275288814) internal successors, (18268), 7098 states have internal predecessors, (18268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:22,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7099 states to 7099 states and 18268 transitions. [2021-06-05 21:05:22,781 INFO L78 Accepts]: Start accepts. Automaton has 7099 states and 18268 transitions. Word has length 47 [2021-06-05 21:05:22,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:05:22,781 INFO L482 AbstractCegarLoop]: Abstraction has 7099 states and 18268 transitions. [2021-06-05 21:05:22,781 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:22,781 INFO L276 IsEmpty]: Start isEmpty. Operand 7099 states and 18268 transitions. [2021-06-05 21:05:22,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 21:05:22,786 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:05:22,787 INFO L554 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:05:22,987 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable454 [2021-06-05 21:05:22,987 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:05:22,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:05:22,987 INFO L82 PathProgramCache]: Analyzing trace with hash 1547338568, now seen corresponding path program 125 times [2021-06-05 21:05:22,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:05:22,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665515407] [2021-06-05 21:05:22,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:05:22,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:05:23,054 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 26 proven. 71 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:05:23,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:05:23,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665515407] [2021-06-05 21:05:23,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665515407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:23,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86091869] [2021-06-05 21:05:23,054 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:05:23,080 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 21:05:23,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:05:23,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 21:05:23,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:05:23,165 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 26 proven. 71 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:05:23,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86091869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:23,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:05:23,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 14 [2021-06-05 21:05:23,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268990152] [2021-06-05 21:05:23,166 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:05:23,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:05:23,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:05:23,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:05:23,166 INFO L87 Difference]: Start difference. First operand 7099 states and 18268 transitions. Second operand has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:23,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:05:23,369 INFO L93 Difference]: Finished difference Result 8869 states and 21483 transitions. [2021-06-05 21:05:23,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:05:23,370 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 21:05:23,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:05:23,379 INFO L225 Difference]: With dead ends: 8869 [2021-06-05 21:05:23,379 INFO L226 Difference]: Without dead ends: 8836 [2021-06-05 21:05:23,380 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 108.8ms TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:05:23,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8836 states. [2021-06-05 21:05:23,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8836 to 7099. [2021-06-05 21:05:23,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7099 states, 7098 states have (on average 2.5732600732600734) internal successors, (18265), 7098 states have internal predecessors, (18265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:23,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7099 states to 7099 states and 18265 transitions. [2021-06-05 21:05:23,476 INFO L78 Accepts]: Start accepts. Automaton has 7099 states and 18265 transitions. Word has length 47 [2021-06-05 21:05:23,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:05:23,477 INFO L482 AbstractCegarLoop]: Abstraction has 7099 states and 18265 transitions. [2021-06-05 21:05:23,477 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:23,477 INFO L276 IsEmpty]: Start isEmpty. Operand 7099 states and 18265 transitions. [2021-06-05 21:05:23,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 21:05:23,482 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:05:23,482 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:05:23,682 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable455 [2021-06-05 21:05:23,682 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:05:23,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:05:23,683 INFO L82 PathProgramCache]: Analyzing trace with hash 1101044381, now seen corresponding path program 126 times [2021-06-05 21:05:23,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:05:23,683 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516486213] [2021-06-05 21:05:23,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:05:23,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:05:23,767 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 81 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:05:23,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:05:23,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516486213] [2021-06-05 21:05:23,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516486213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:23,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185007587] [2021-06-05 21:05:23,768 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 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:05:23,795 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-06-05 21:05:23,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:05:23,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:05:23,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:05:23,861 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 82 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:05:23,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185007587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:23,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:05:23,861 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:05:23,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140721722] [2021-06-05 21:05:23,861 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:05:23,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:05:23,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:05:23,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:05:23,862 INFO L87 Difference]: Start difference. First operand 7099 states and 18265 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:24,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:05:24,912 INFO L93 Difference]: Finished difference Result 13900 states and 32512 transitions. [2021-06-05 21:05:24,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 21:05:24,912 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 21:05:24,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:05:24,927 INFO L225 Difference]: With dead ends: 13900 [2021-06-05 21:05:24,927 INFO L226 Difference]: Without dead ends: 13624 [2021-06-05 21:05:24,928 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1372 ImplicationChecksByTransitivity, 619.8ms TimeCoverageRelationStatistics Valid=489, Invalid=3671, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 21:05:24,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13624 states. [2021-06-05 21:05:25,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13624 to 7315. [2021-06-05 21:05:25,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7315 states, 7314 states have (on average 2.568635493573968) internal successors, (18787), 7314 states have internal predecessors, (18787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:25,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7315 states to 7315 states and 18787 transitions. [2021-06-05 21:05:25,051 INFO L78 Accepts]: Start accepts. Automaton has 7315 states and 18787 transitions. Word has length 47 [2021-06-05 21:05:25,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:05:25,051 INFO L482 AbstractCegarLoop]: Abstraction has 7315 states and 18787 transitions. [2021-06-05 21:05:25,051 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:25,051 INFO L276 IsEmpty]: Start isEmpty. Operand 7315 states and 18787 transitions. [2021-06-05 21:05:25,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 21:05:25,056 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:05:25,056 INFO L554 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:05:25,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable460,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:05:25,256 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:05:25,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:05:25,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1300350046, now seen corresponding path program 127 times [2021-06-05 21:05:25,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:05:25,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962268524] [2021-06-05 21:05:25,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:05:25,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:05:25,333 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 30 proven. 67 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:05:25,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:05:25,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962268524] [2021-06-05 21:05:25,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962268524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:25,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195120004] [2021-06-05 21:05:25,334 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:05:25,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:05:25,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 21:05:25,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:05:25,428 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 30 proven. 67 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:05:25,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195120004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:25,428 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:05:25,428 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-05 21:05:25,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002946690] [2021-06-05 21:05:25,428 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:05:25,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:05:25,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:05:25,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:05:25,430 INFO L87 Difference]: Start difference. First operand 7315 states and 18787 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:25,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:05:25,643 INFO L93 Difference]: Finished difference Result 9027 states and 21871 transitions. [2021-06-05 21:05:25,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:05:25,644 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 21:05:25,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:05:25,655 INFO L225 Difference]: With dead ends: 9027 [2021-06-05 21:05:25,655 INFO L226 Difference]: Without dead ends: 8985 [2021-06-05 21:05:25,655 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 107.2ms TimeCoverageRelationStatistics Valid=102, Invalid=204, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:05:25,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8985 states. [2021-06-05 21:05:25,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8985 to 7097. [2021-06-05 21:05:25,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7097 states, 7096 states have (on average 2.5593291995490417) internal successors, (18161), 7096 states have internal predecessors, (18161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:25,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7097 states to 7097 states and 18161 transitions. [2021-06-05 21:05:25,760 INFO L78 Accepts]: Start accepts. Automaton has 7097 states and 18161 transitions. Word has length 47 [2021-06-05 21:05:25,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:05:25,760 INFO L482 AbstractCegarLoop]: Abstraction has 7097 states and 18161 transitions. [2021-06-05 21:05:25,760 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:25,760 INFO L276 IsEmpty]: Start isEmpty. Operand 7097 states and 18161 transitions. [2021-06-05 21:05:25,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 21:05:25,764 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:05:25,764 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:05:25,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable461,235 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:05:25,969 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:05:25,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:05:25,969 INFO L82 PathProgramCache]: Analyzing trace with hash 947730515, now seen corresponding path program 128 times [2021-06-05 21:05:25,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:05:25,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333990453] [2021-06-05 21:05:25,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:05:25,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:05:26,065 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:05:26,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:05:26,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333990453] [2021-06-05 21:05:26,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333990453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:26,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424851145] [2021-06-05 21:05:26,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:05:26,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:05:26,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:05:26,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:05:26,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:05:26,154 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:05:26,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424851145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:26,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:05:26,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 21:05:26,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640950300] [2021-06-05 21:05:26,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:05:26,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:05:26,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:05:26,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:05:26,155 INFO L87 Difference]: Start difference. First operand 7097 states and 18161 transitions. Second operand has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:26,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:05:26,702 INFO L93 Difference]: Finished difference Result 9058 states and 21780 transitions. [2021-06-05 21:05:26,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:05:26,702 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 21:05:26,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:05:26,712 INFO L225 Difference]: With dead ends: 9058 [2021-06-05 21:05:26,712 INFO L226 Difference]: Without dead ends: 8680 [2021-06-05 21:05:26,712 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 236.6ms TimeCoverageRelationStatistics Valid=132, Invalid=624, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:05:26,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8680 states. [2021-06-05 21:05:26,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8680 to 6394. [2021-06-05 21:05:26,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6394 states, 6393 states have (on average 2.564210855623338) internal successors, (16393), 6393 states have internal predecessors, (16393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:26,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6394 states to 6394 states and 16393 transitions. [2021-06-05 21:05:26,786 INFO L78 Accepts]: Start accepts. Automaton has 6394 states and 16393 transitions. Word has length 47 [2021-06-05 21:05:26,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:05:26,786 INFO L482 AbstractCegarLoop]: Abstraction has 6394 states and 16393 transitions. [2021-06-05 21:05:26,786 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:26,787 INFO L276 IsEmpty]: Start isEmpty. Operand 6394 states and 16393 transitions. [2021-06-05 21:05:26,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 21:05:26,790 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:05:26,790 INFO L554 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:05:26,991 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable467,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:05:26,991 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:05:26,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:05:26,991 INFO L82 PathProgramCache]: Analyzing trace with hash 87788588, now seen corresponding path program 58 times [2021-06-05 21:05:26,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:05:26,991 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95675624] [2021-06-05 21:05:26,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:05:26,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:05:27,045 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 75 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:05:27,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:05:27,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95675624] [2021-06-05 21:05:27,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95675624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:27,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154000604] [2021-06-05 21:05:27,046 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:05:27,069 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:05:27,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:05:27,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 21:05:27,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:05:27,140 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 76 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:05:27,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154000604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:27,140 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:05:27,140 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 10 [2021-06-05 21:05:27,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551358640] [2021-06-05 21:05:27,140 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:05:27,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:05:27,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:05:27,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:05:27,140 INFO L87 Difference]: Start difference. First operand 6394 states and 16393 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:27,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:05:27,349 INFO L93 Difference]: Finished difference Result 9182 states and 22469 transitions. [2021-06-05 21:05:27,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:05:27,350 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 21:05:27,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:05:27,363 INFO L225 Difference]: With dead ends: 9182 [2021-06-05 21:05:27,364 INFO L226 Difference]: Without dead ends: 9182 [2021-06-05 21:05:27,364 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 86.8ms TimeCoverageRelationStatistics Valid=101, Invalid=139, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:05:27,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9182 states. [2021-06-05 21:05:27,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9182 to 6584. [2021-06-05 21:05:27,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6584 states, 6583 states have (on average 2.5773963238644995) internal successors, (16967), 6583 states have internal predecessors, (16967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:27,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6584 states to 6584 states and 16967 transitions. [2021-06-05 21:05:27,471 INFO L78 Accepts]: Start accepts. Automaton has 6584 states and 16967 transitions. Word has length 47 [2021-06-05 21:05:27,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:05:27,471 INFO L482 AbstractCegarLoop]: Abstraction has 6584 states and 16967 transitions. [2021-06-05 21:05:27,471 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:27,471 INFO L276 IsEmpty]: Start isEmpty. Operand 6584 states and 16967 transitions. [2021-06-05 21:05:27,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 21:05:27,476 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:05:27,476 INFO L554 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:05:27,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable468 [2021-06-05 21:05:27,676 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:05:27,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:05:27,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1549783868, now seen corresponding path program 59 times [2021-06-05 21:05:27,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:05:27,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524989944] [2021-06-05 21:05:27,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:05:27,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:05:27,740 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 75 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:05:27,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:05:27,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524989944] [2021-06-05 21:05:27,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524989944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:27,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105649515] [2021-06-05 21:05:27,740 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:05:27,768 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-06-05 21:05:27,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:05:27,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 21:05:27,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:05:27,953 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 76 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:05:27,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105649515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:27,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:05:27,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 24 [2021-06-05 21:05:27,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835264066] [2021-06-05 21:05:27,954 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:05:27,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:05:27,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:05:27,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:05:27,954 INFO L87 Difference]: Start difference. First operand 6584 states and 16967 transitions. Second operand has 25 states, 25 states have (on average 3.32) internal successors, (83), 24 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:28,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:05:28,719 INFO L93 Difference]: Finished difference Result 10546 states and 25434 transitions. [2021-06-05 21:05:28,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 21:05:28,720 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.32) internal successors, (83), 24 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 21:05:28,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:05:28,730 INFO L225 Difference]: With dead ends: 10546 [2021-06-05 21:05:28,730 INFO L226 Difference]: Without dead ends: 10546 [2021-06-05 21:05:28,730 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 416.9ms TimeCoverageRelationStatistics Valid=568, Invalid=1154, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 21:05:28,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10546 states. [2021-06-05 21:05:28,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10546 to 6608. [2021-06-05 21:05:28,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6608 states, 6607 states have (on average 2.5784773724837295) internal successors, (17036), 6607 states have internal predecessors, (17036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:28,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6608 states to 6608 states and 17036 transitions. [2021-06-05 21:05:28,824 INFO L78 Accepts]: Start accepts. Automaton has 6608 states and 17036 transitions. Word has length 47 [2021-06-05 21:05:28,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:05:28,824 INFO L482 AbstractCegarLoop]: Abstraction has 6608 states and 17036 transitions. [2021-06-05 21:05:28,824 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 3.32) internal successors, (83), 24 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:28,824 INFO L276 IsEmpty]: Start isEmpty. Operand 6608 states and 17036 transitions. [2021-06-05 21:05:28,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 21:05:28,829 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:05:28,829 INFO L554 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:05:29,029 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable469,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:05:29,029 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:05:29,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:05:29,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1055188264, now seen corresponding path program 60 times [2021-06-05 21:05:29,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:05:29,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39496408] [2021-06-05 21:05:29,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:05:29,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:05:29,099 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 71 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:05:29,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:05:29,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39496408] [2021-06-05 21:05:29,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39496408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:29,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378163449] [2021-06-05 21:05:29,099 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:05:29,126 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-06-05 21:05:29,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:05:29,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 21:05:29,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:05:29,197 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 72 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:05:29,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378163449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:29,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:05:29,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 12 [2021-06-05 21:05:29,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802584052] [2021-06-05 21:05:29,198 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:05:29,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:05:29,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:05:29,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:05:29,198 INFO L87 Difference]: Start difference. First operand 6608 states and 17036 transitions. Second operand has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:29,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:05:29,516 INFO L93 Difference]: Finished difference Result 9881 states and 24078 transitions. [2021-06-05 21:05:29,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:05:29,517 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 21:05:29,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:05:29,528 INFO L225 Difference]: With dead ends: 9881 [2021-06-05 21:05:29,528 INFO L226 Difference]: Without dead ends: 9881 [2021-06-05 21:05:29,528 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 157.6ms TimeCoverageRelationStatistics Valid=213, Invalid=339, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:05:29,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9881 states. [2021-06-05 21:05:29,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9881 to 6643. [2021-06-05 21:05:29,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6643 states, 6642 states have (on average 2.580246913580247) internal successors, (17138), 6642 states have internal predecessors, (17138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:29,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6643 states to 6643 states and 17138 transitions. [2021-06-05 21:05:29,641 INFO L78 Accepts]: Start accepts. Automaton has 6643 states and 17138 transitions. Word has length 47 [2021-06-05 21:05:29,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:05:29,641 INFO L482 AbstractCegarLoop]: Abstraction has 6643 states and 17138 transitions. [2021-06-05 21:05:29,642 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:29,642 INFO L276 IsEmpty]: Start isEmpty. Operand 6643 states and 17138 transitions. [2021-06-05 21:05:29,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 21:05:29,647 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:05:29,647 INFO L554 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:05:29,847 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable470,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:05:29,847 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:05:29,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:05:29,847 INFO L82 PathProgramCache]: Analyzing trace with hash 15901252, now seen corresponding path program 61 times [2021-06-05 21:05:29,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:05:29,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414350690] [2021-06-05 21:05:29,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:05:29,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:05:29,928 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 67 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:05:29,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:05:29,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414350690] [2021-06-05 21:05:29,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414350690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:29,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320047009] [2021-06-05 21:05:29,928 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:05:29,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:05:29,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 21:05:29,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:05:30,047 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 68 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:05:30,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320047009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:30,047 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:05:30,047 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-06-05 21:05:30,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72996592] [2021-06-05 21:05:30,048 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:05:30,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:05:30,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:05:30,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:05:30,048 INFO L87 Difference]: Start difference. First operand 6643 states and 17138 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:30,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:05:30,394 INFO L93 Difference]: Finished difference Result 9085 states and 22271 transitions. [2021-06-05 21:05:30,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:05:30,394 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 21:05:30,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:05:30,404 INFO L225 Difference]: With dead ends: 9085 [2021-06-05 21:05:30,405 INFO L226 Difference]: Without dead ends: 9085 [2021-06-05 21:05:30,405 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 174.7ms TimeCoverageRelationStatistics Valid=227, Invalid=373, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:05:30,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9085 states. [2021-06-05 21:05:30,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9085 to 6641. [2021-06-05 21:05:30,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6641 states, 6640 states have (on average 2.5802710843373493) internal successors, (17133), 6640 states have internal predecessors, (17133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:30,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6641 states to 6641 states and 17133 transitions. [2021-06-05 21:05:30,505 INFO L78 Accepts]: Start accepts. Automaton has 6641 states and 17133 transitions. Word has length 47 [2021-06-05 21:05:30,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:05:30,505 INFO L482 AbstractCegarLoop]: Abstraction has 6641 states and 17133 transitions. [2021-06-05 21:05:30,505 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:30,505 INFO L276 IsEmpty]: Start isEmpty. Operand 6641 states and 17133 transitions. [2021-06-05 21:05:30,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 21:05:30,509 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:05:30,509 INFO L554 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:05:30,710 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable471,240 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:05:30,710 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:05:30,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:05:30,710 INFO L82 PathProgramCache]: Analyzing trace with hash 1035763624, now seen corresponding path program 62 times [2021-06-05 21:05:30,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:05:30,710 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330354107] [2021-06-05 21:05:30,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:05:30,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:05:30,803 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 63 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:05:30,803 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:05:30,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330354107] [2021-06-05 21:05:30,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330354107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:30,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150133569] [2021-06-05 21:05:30,803 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:05:30,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:05:30,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:05:30,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 21:05:30,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:05:30,901 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 64 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:05:30,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150133569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:30,901 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:05:30,901 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 14 [2021-06-05 21:05:30,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631209303] [2021-06-05 21:05:30,902 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:05:30,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:05:30,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:05:30,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:05:30,902 INFO L87 Difference]: Start difference. First operand 6641 states and 17133 transitions. Second operand has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:31,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:05:31,304 INFO L93 Difference]: Finished difference Result 7979 states and 19784 transitions. [2021-06-05 21:05:31,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:05:31,304 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 21:05:31,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:05:31,312 INFO L225 Difference]: With dead ends: 7979 [2021-06-05 21:05:31,312 INFO L226 Difference]: Without dead ends: 7979 [2021-06-05 21:05:31,312 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 181.3ms TimeCoverageRelationStatistics Valid=199, Invalid=353, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:05:31,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7979 states. [2021-06-05 21:05:31,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7979 to 6178. [2021-06-05 21:05:31,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6178 states, 6177 states have (on average 2.5810263882143434) internal successors, (15943), 6177 states have internal predecessors, (15943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:31,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6178 states to 6178 states and 15943 transitions. [2021-06-05 21:05:31,394 INFO L78 Accepts]: Start accepts. Automaton has 6178 states and 15943 transitions. Word has length 47 [2021-06-05 21:05:31,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:05:31,394 INFO L482 AbstractCegarLoop]: Abstraction has 6178 states and 15943 transitions. [2021-06-05 21:05:31,394 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:31,394 INFO L276 IsEmpty]: Start isEmpty. Operand 6178 states and 15943 transitions. [2021-06-05 21:05:31,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 21:05:31,429 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:05:31,429 INFO L554 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:05:31,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable472,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:05:31,630 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:05:31,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:05:31,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1697148168, now seen corresponding path program 129 times [2021-06-05 21:05:31,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:05:31,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062192729] [2021-06-05 21:05:31,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:05:31,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:05:31,716 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 41 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:05:31,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:05:31,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062192729] [2021-06-05 21:05:31,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062192729] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:31,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526492483] [2021-06-05 21:05:31,717 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:05:31,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 21:05:31,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:05:31,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 21:05:31,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:05:31,814 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 41 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:05:31,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526492483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:31,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:05:31,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-06-05 21:05:31,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681655804] [2021-06-05 21:05:31,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:05:31,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:05:31,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:05:31,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:05:31,814 INFO L87 Difference]: Start difference. First operand 6178 states and 15943 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:32,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:05:32,033 INFO L93 Difference]: Finished difference Result 7415 states and 18154 transitions. [2021-06-05 21:05:32,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:05:32,033 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 21:05:32,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:05:32,039 INFO L225 Difference]: With dead ends: 7415 [2021-06-05 21:05:32,039 INFO L226 Difference]: Without dead ends: 7370 [2021-06-05 21:05:32,039 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 128.4ms TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:05:32,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7370 states. [2021-06-05 21:05:32,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7370 to 6187. [2021-06-05 21:05:32,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6187 states, 6186 states have (on average 2.5796960879405106) internal successors, (15958), 6186 states have internal predecessors, (15958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:32,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6187 states to 6187 states and 15958 transitions. [2021-06-05 21:05:32,110 INFO L78 Accepts]: Start accepts. Automaton has 6187 states and 15958 transitions. Word has length 47 [2021-06-05 21:05:32,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:05:32,110 INFO L482 AbstractCegarLoop]: Abstraction has 6187 states and 15958 transitions. [2021-06-05 21:05:32,110 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:32,110 INFO L276 IsEmpty]: Start isEmpty. Operand 6187 states and 15958 transitions. [2021-06-05 21:05:32,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 21:05:32,114 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:05:32,114 INFO L554 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:05:32,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable473,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:05:32,317 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:05:32,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:05:32,317 INFO L82 PathProgramCache]: Analyzing trace with hash -686375646, now seen corresponding path program 130 times [2021-06-05 21:05:32,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:05:32,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301178298] [2021-06-05 21:05:32,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:05:32,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:05:32,416 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 49 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:05:32,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:05:32,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301178298] [2021-06-05 21:05:32,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301178298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:32,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708080895] [2021-06-05 21:05:32,417 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:05:32,440 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:05:32,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:05:32,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 21:05:32,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:05:32,510 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 49 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:05:32,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708080895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:32,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:05:32,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-06-05 21:05:32,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251894936] [2021-06-05 21:05:32,511 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:05:32,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:05:32,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:05:32,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:05:32,511 INFO L87 Difference]: Start difference. First operand 6187 states and 15958 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:32,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:05:32,817 INFO L93 Difference]: Finished difference Result 7945 states and 19639 transitions. [2021-06-05 21:05:32,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:05:32,817 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 21:05:32,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:05:32,826 INFO L225 Difference]: With dead ends: 7945 [2021-06-05 21:05:32,826 INFO L226 Difference]: Without dead ends: 7945 [2021-06-05 21:05:32,826 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 169.1ms TimeCoverageRelationStatistics Valid=182, Invalid=324, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:05:32,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7945 states. [2021-06-05 21:05:32,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7945 to 6576. [2021-06-05 21:05:32,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6576 states, 6575 states have (on average 2.607148288973384) internal successors, (17142), 6575 states have internal predecessors, (17142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:32,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6576 states to 6576 states and 17142 transitions. [2021-06-05 21:05:32,913 INFO L78 Accepts]: Start accepts. Automaton has 6576 states and 17142 transitions. Word has length 47 [2021-06-05 21:05:32,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:05:32,913 INFO L482 AbstractCegarLoop]: Abstraction has 6576 states and 17142 transitions. [2021-06-05 21:05:32,913 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:32,913 INFO L276 IsEmpty]: Start isEmpty. Operand 6576 states and 17142 transitions. [2021-06-05 21:05:32,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 21:05:32,918 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:05:32,918 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:05:33,118 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable480 [2021-06-05 21:05:33,119 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:05:33,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:05:33,119 INFO L82 PathProgramCache]: Analyzing trace with hash 1627893973, now seen corresponding path program 63 times [2021-06-05 21:05:33,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:05:33,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683019617] [2021-06-05 21:05:33,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:05:33,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:05:33,212 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:05:33,212 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:05:33,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683019617] [2021-06-05 21:05:33,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683019617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:33,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100554050] [2021-06-05 21:05:33,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:05:33,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 21:05:33,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:05:33,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:05:33,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:05:33,309 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:05:33,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100554050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:33,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:05:33,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 21:05:33,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761679187] [2021-06-05 21:05:33,309 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:05:33,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:05:33,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:05:33,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:05:33,310 INFO L87 Difference]: Start difference. First operand 6576 states and 17142 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:33,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:05:33,782 INFO L93 Difference]: Finished difference Result 9298 states and 22741 transitions. [2021-06-05 21:05:33,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:05:33,782 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 21:05:33,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:05:33,790 INFO L225 Difference]: With dead ends: 9298 [2021-06-05 21:05:33,790 INFO L226 Difference]: Without dead ends: 9166 [2021-06-05 21:05:33,790 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 239.7ms TimeCoverageRelationStatistics Valid=132, Invalid=624, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:05:33,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9166 states. [2021-06-05 21:05:33,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9166 to 6568. [2021-06-05 21:05:33,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6568 states, 6567 states have (on average 2.607735647936653) internal successors, (17125), 6567 states have internal predecessors, (17125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:33,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6568 states to 6568 states and 17125 transitions. [2021-06-05 21:05:33,869 INFO L78 Accepts]: Start accepts. Automaton has 6568 states and 17125 transitions. Word has length 47 [2021-06-05 21:05:33,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:05:33,869 INFO L482 AbstractCegarLoop]: Abstraction has 6568 states and 17125 transitions. [2021-06-05 21:05:33,870 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:33,870 INFO L276 IsEmpty]: Start isEmpty. Operand 6568 states and 17125 transitions. [2021-06-05 21:05:33,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 21:05:33,873 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:05:33,873 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:05:34,074 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable481,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:05:34,074 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:05:34,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:05:34,074 INFO L82 PathProgramCache]: Analyzing trace with hash 1148331157, now seen corresponding path program 131 times [2021-06-05 21:05:34,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:05:34,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513682719] [2021-06-05 21:05:34,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:05:34,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:05:34,178 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 14 proven. 81 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:05:34,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:05:34,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513682719] [2021-06-05 21:05:34,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513682719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:34,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359066429] [2021-06-05 21:05:34,178 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:05:34,204 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 21:05:34,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:05:34,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:05:34,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:05:34,379 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 84 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:05:34,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359066429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:34,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:05:34,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 21:05:34,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013455886] [2021-06-05 21:05:34,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:05:34,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:05:34,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:05:34,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:05:34,380 INFO L87 Difference]: Start difference. First operand 6568 states and 17125 transitions. Second operand has 18 states, 18 states have (on average 3.5) internal successors, (63), 17 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:34,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:05:34,976 INFO L93 Difference]: Finished difference Result 6738 states and 17392 transitions. [2021-06-05 21:05:34,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:05:34,977 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.5) internal successors, (63), 17 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 21:05:34,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:05:34,983 INFO L225 Difference]: With dead ends: 6738 [2021-06-05 21:05:34,983 INFO L226 Difference]: Without dead ends: 6682 [2021-06-05 21:05:34,983 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 178.9ms TimeCoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:05:34,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6682 states. [2021-06-05 21:05:35,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6682 to 6568. [2021-06-05 21:05:35,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6568 states, 6567 states have (on average 2.6045378407187454) internal successors, (17104), 6567 states have internal predecessors, (17104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:35,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6568 states to 6568 states and 17104 transitions. [2021-06-05 21:05:35,062 INFO L78 Accepts]: Start accepts. Automaton has 6568 states and 17104 transitions. Word has length 47 [2021-06-05 21:05:35,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:05:35,063 INFO L482 AbstractCegarLoop]: Abstraction has 6568 states and 17104 transitions. [2021-06-05 21:05:35,063 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.5) internal successors, (63), 17 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:35,063 INFO L276 IsEmpty]: Start isEmpty. Operand 6568 states and 17104 transitions. [2021-06-05 21:05:35,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 21:05:35,067 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:05:35,067 INFO L554 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:05:35,267 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable482 [2021-06-05 21:05:35,268 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:05:35,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:05:35,268 INFO L82 PathProgramCache]: Analyzing trace with hash -759601188, now seen corresponding path program 64 times [2021-06-05 21:05:35,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:05:35,268 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288316425] [2021-06-05 21:05:35,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:05:35,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:05:35,344 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 35 proven. 61 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:05:35,344 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:05:35,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288316425] [2021-06-05 21:05:35,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288316425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:35,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456339938] [2021-06-05 21:05:35,344 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:05:35,368 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:05:35,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:05:35,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 21:05:35,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:05:35,441 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 36 proven. 61 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:05:35,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456339938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:35,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:05:35,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-06-05 21:05:35,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301844385] [2021-06-05 21:05:35,442 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:05:35,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:05:35,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:05:35,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:05:35,442 INFO L87 Difference]: Start difference. First operand 6568 states and 17104 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:35,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:05:35,670 INFO L93 Difference]: Finished difference Result 8053 states and 20088 transitions. [2021-06-05 21:05:35,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:05:35,670 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 21:05:35,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:05:35,678 INFO L225 Difference]: With dead ends: 8053 [2021-06-05 21:05:35,678 INFO L226 Difference]: Without dead ends: 7951 [2021-06-05 21:05:35,678 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 113.7ms TimeCoverageRelationStatistics Valid=109, Invalid=233, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:05:35,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7951 states. [2021-06-05 21:05:35,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7951 to 6416. [2021-06-05 21:05:35,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6416 states, 6415 states have (on average 2.6084177708495715) internal successors, (16733), 6415 states have internal predecessors, (16733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:35,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6416 states to 6416 states and 16733 transitions. [2021-06-05 21:05:35,763 INFO L78 Accepts]: Start accepts. Automaton has 6416 states and 16733 transitions. Word has length 47 [2021-06-05 21:05:35,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:05:35,763 INFO L482 AbstractCegarLoop]: Abstraction has 6416 states and 16733 transitions. [2021-06-05 21:05:35,763 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:35,763 INFO L276 IsEmpty]: Start isEmpty. Operand 6416 states and 16733 transitions. [2021-06-05 21:05:35,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 21:05:35,767 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:05:35,767 INFO L554 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:05:35,967 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable483,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:05:35,967 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:05:35,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:05:35,968 INFO L82 PathProgramCache]: Analyzing trace with hash 372425610, now seen corresponding path program 132 times [2021-06-05 21:05:35,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:05:35,968 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661118917] [2021-06-05 21:05:35,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:05:35,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:05:36,044 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 47 proven. 50 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:05:36,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:05:36,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661118917] [2021-06-05 21:05:36,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661118917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:36,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700768543] [2021-06-05 21:05:36,045 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:05:36,072 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 21:05:36,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:05:36,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:05:36,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:05:36,184 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 80 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:05:36,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700768543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:36,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:05:36,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 21:05:36,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160918893] [2021-06-05 21:05:36,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:05:36,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:05:36,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:05:36,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:05:36,185 INFO L87 Difference]: Start difference. First operand 6416 states and 16733 transitions. Second operand has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 16 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:36,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:05:36,495 INFO L93 Difference]: Finished difference Result 8176 states and 20353 transitions. [2021-06-05 21:05:36,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:05:36,496 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 16 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 21:05:36,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:05:36,504 INFO L225 Difference]: With dead ends: 8176 [2021-06-05 21:05:36,504 INFO L226 Difference]: Without dead ends: 8176 [2021-06-05 21:05:36,504 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 177.0ms TimeCoverageRelationStatistics Valid=203, Invalid=349, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:05:36,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8176 states. [2021-06-05 21:05:36,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8176 to 6714. [2021-06-05 21:05:36,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6714 states, 6713 states have (on average 2.627588261582005) internal successors, (17639), 6713 states have internal predecessors, (17639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:36,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6714 states to 6714 states and 17639 transitions. [2021-06-05 21:05:36,586 INFO L78 Accepts]: Start accepts. Automaton has 6714 states and 17639 transitions. Word has length 47 [2021-06-05 21:05:36,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:05:36,587 INFO L482 AbstractCegarLoop]: Abstraction has 6714 states and 17639 transitions. [2021-06-05 21:05:36,587 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 16 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:36,587 INFO L276 IsEmpty]: Start isEmpty. Operand 6714 states and 17639 transitions. [2021-06-05 21:05:36,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 21:05:36,592 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:05:36,592 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:05:36,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable489 [2021-06-05 21:05:36,792 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:05:36,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:05:36,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1064796407, now seen corresponding path program 65 times [2021-06-05 21:05:36,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:05:36,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911241108] [2021-06-05 21:05:36,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:05:36,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:05:36,879 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:05:36,879 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:05:36,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911241108] [2021-06-05 21:05:36,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911241108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:36,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727372832] [2021-06-05 21:05:36,879 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:05:36,908 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 21:05:36,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:05:36,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:05:36,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:05:36,982 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:05:36,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727372832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:36,983 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:05:36,983 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:05:36,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111707413] [2021-06-05 21:05:36,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:05:36,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:05:36,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:05:36,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:05:36,983 INFO L87 Difference]: Start difference. First operand 6714 states and 17639 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:37,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:05:37,402 INFO L93 Difference]: Finished difference Result 8947 states and 22376 transitions. [2021-06-05 21:05:37,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:05:37,403 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 21:05:37,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:05:37,414 INFO L225 Difference]: With dead ends: 8947 [2021-06-05 21:05:37,414 INFO L226 Difference]: Without dead ends: 8933 [2021-06-05 21:05:37,414 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 193.7ms TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:05:37,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8933 states. [2021-06-05 21:05:37,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8933 to 6712. [2021-06-05 21:05:37,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6712 states, 6711 states have (on average 2.633586648785576) internal successors, (17674), 6711 states have internal predecessors, (17674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:37,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6712 states to 6712 states and 17674 transitions. [2021-06-05 21:05:37,554 INFO L78 Accepts]: Start accepts. Automaton has 6712 states and 17674 transitions. Word has length 47 [2021-06-05 21:05:37,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:05:37,554 INFO L482 AbstractCegarLoop]: Abstraction has 6712 states and 17674 transitions. [2021-06-05 21:05:37,554 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:37,554 INFO L276 IsEmpty]: Start isEmpty. Operand 6712 states and 17674 transitions. [2021-06-05 21:05:37,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 21:05:37,558 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:05:37,558 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:05:37,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable492,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:05:37,764 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:05:37,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:05:37,765 INFO L82 PathProgramCache]: Analyzing trace with hash 902744311, now seen corresponding path program 133 times [2021-06-05 21:05:37,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:05:37,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128378741] [2021-06-05 21:05:37,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:05:37,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:05:37,858 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 14 proven. 81 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:05:37,858 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:05:37,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128378741] [2021-06-05 21:05:37,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128378741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:37,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540820932] [2021-06-05 21:05:37,858 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:05:37,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:05:37,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:05:37,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:05:38,034 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 84 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:05:38,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540820932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:38,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:05:38,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-05 21:05:38,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639618185] [2021-06-05 21:05:38,035 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:05:38,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:05:38,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:05:38,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:05:38,036 INFO L87 Difference]: Start difference. First operand 6712 states and 17674 transitions. Second operand has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:38,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:05:38,465 INFO L93 Difference]: Finished difference Result 6816 states and 17833 transitions. [2021-06-05 21:05:38,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:05:38,465 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 21:05:38,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:05:38,472 INFO L225 Difference]: With dead ends: 6816 [2021-06-05 21:05:38,472 INFO L226 Difference]: Without dead ends: 6772 [2021-06-05 21:05:38,472 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 146.4ms TimeCoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:05:38,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6772 states. [2021-06-05 21:05:38,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6772 to 6712. [2021-06-05 21:05:38,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6712 states, 6711 states have (on average 2.6322455669795857) internal successors, (17665), 6711 states have internal predecessors, (17665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:38,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6712 states to 6712 states and 17665 transitions. [2021-06-05 21:05:38,551 INFO L78 Accepts]: Start accepts. Automaton has 6712 states and 17665 transitions. Word has length 47 [2021-06-05 21:05:38,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:05:38,551 INFO L482 AbstractCegarLoop]: Abstraction has 6712 states and 17665 transitions. [2021-06-05 21:05:38,551 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:38,551 INFO L276 IsEmpty]: Start isEmpty. Operand 6712 states and 17665 transitions. [2021-06-05 21:05:38,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 21:05:38,555 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:05:38,555 INFO L554 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:05:38,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable493,249 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:05:38,756 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:05:38,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:05:38,756 INFO L82 PathProgramCache]: Analyzing trace with hash -1077953366, now seen corresponding path program 66 times [2021-06-05 21:05:38,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:05:38,756 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070553850] [2021-06-05 21:05:38,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:05:38,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:05:38,832 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 40 proven. 57 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:05:38,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:05:38,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070553850] [2021-06-05 21:05:38,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070553850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:38,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506492545] [2021-06-05 21:05:38,833 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:05:38,860 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 21:05:38,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:05:38,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 21:05:38,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:05:38,947 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 41 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:05:38,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506492545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:38,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:05:38,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 15 [2021-06-05 21:05:38,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850527127] [2021-06-05 21:05:38,947 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:05:38,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:05:38,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:05:38,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:05:38,948 INFO L87 Difference]: Start difference. First operand 6712 states and 17665 transitions. Second operand has 16 states, 16 states have (on average 3.8125) internal successors, (61), 15 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:39,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:05:39,204 INFO L93 Difference]: Finished difference Result 7827 states and 19871 transitions. [2021-06-05 21:05:39,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:05:39,204 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 15 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 21:05:39,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:05:39,213 INFO L225 Difference]: With dead ends: 7827 [2021-06-05 21:05:39,213 INFO L226 Difference]: Without dead ends: 7773 [2021-06-05 21:05:39,214 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 119.4ms TimeCoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:05:39,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7773 states. [2021-06-05 21:05:39,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7773 to 6518. [2021-06-05 21:05:39,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6518 states, 6517 states have (on average 2.63265306122449) internal successors, (17157), 6517 states have internal predecessors, (17157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:39,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6518 states to 6518 states and 17157 transitions. [2021-06-05 21:05:39,298 INFO L78 Accepts]: Start accepts. Automaton has 6518 states and 17157 transitions. Word has length 47 [2021-06-05 21:05:39,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:05:39,298 INFO L482 AbstractCegarLoop]: Abstraction has 6518 states and 17157 transitions. [2021-06-05 21:05:39,298 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 15 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:39,298 INFO L276 IsEmpty]: Start isEmpty. Operand 6518 states and 17157 transitions. [2021-06-05 21:05:39,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 21:05:39,302 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:05:39,302 INFO L554 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:05:39,502 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable494,250 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:05:39,503 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:05:39,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:05:39,503 INFO L82 PathProgramCache]: Analyzing trace with hash 1517458978, now seen corresponding path program 134 times [2021-06-05 21:05:39,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:05:39,503 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990687024] [2021-06-05 21:05:39,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:05:39,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:05:39,570 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 45 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:05:39,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:05:39,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990687024] [2021-06-05 21:05:39,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990687024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:39,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068818323] [2021-06-05 21:05:39,570 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:05:39,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:05:39,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:05:39,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 21:05:39,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:05:39,664 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 45 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:05:39,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068818323] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:39,665 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:05:39,665 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 21:05:39,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426084454] [2021-06-05 21:05:39,665 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:05:39,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:05:39,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:05:39,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:05:39,665 INFO L87 Difference]: Start difference. First operand 6518 states and 17157 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:39,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:05:39,867 INFO L93 Difference]: Finished difference Result 8402 states and 21039 transitions. [2021-06-05 21:05:39,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:05:39,868 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 21:05:39,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:05:39,877 INFO L225 Difference]: With dead ends: 8402 [2021-06-05 21:05:39,877 INFO L226 Difference]: Without dead ends: 8402 [2021-06-05 21:05:39,877 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 98.1ms TimeCoverageRelationStatistics Valid=105, Invalid=167, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:05:39,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8402 states. [2021-06-05 21:05:39,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8402 to 6836. [2021-06-05 21:05:39,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6836 states, 6835 states have (on average 2.651207022677396) internal successors, (18121), 6835 states have internal predecessors, (18121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:39,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6836 states to 6836 states and 18121 transitions. [2021-06-05 21:05:39,970 INFO L78 Accepts]: Start accepts. Automaton has 6836 states and 18121 transitions. Word has length 47 [2021-06-05 21:05:39,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:05:39,970 INFO L482 AbstractCegarLoop]: Abstraction has 6836 states and 18121 transitions. [2021-06-05 21:05:39,970 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:39,970 INFO L276 IsEmpty]: Start isEmpty. Operand 6836 states and 18121 transitions. [2021-06-05 21:05:39,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 21:05:39,974 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:05:39,974 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:05:40,175 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable500,251 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:05:40,175 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:05:40,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:05:40,175 INFO L82 PathProgramCache]: Analyzing trace with hash -1223920619, now seen corresponding path program 67 times [2021-06-05 21:05:40,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:05:40,175 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321123148] [2021-06-05 21:05:40,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:05:40,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:05:40,253 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:05:40,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:05:40,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321123148] [2021-06-05 21:05:40,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321123148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:40,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60633482] [2021-06-05 21:05:40,253 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:05:40,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:05:40,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:05:40,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:05:40,345 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:05:40,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60633482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:40,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:05:40,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 21:05:40,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239884259] [2021-06-05 21:05:40,345 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:05:40,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:05:40,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:05:40,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:05:40,346 INFO L87 Difference]: Start difference. First operand 6836 states and 18121 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:40,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:05:40,749 INFO L93 Difference]: Finished difference Result 8432 states and 21485 transitions. [2021-06-05 21:05:40,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:05:40,750 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 21:05:40,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:05:40,757 INFO L225 Difference]: With dead ends: 8432 [2021-06-05 21:05:40,757 INFO L226 Difference]: Without dead ends: 8418 [2021-06-05 21:05:40,757 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 157.9ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:05:40,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8418 states. [2021-06-05 21:05:40,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8418 to 6863. [2021-06-05 21:05:40,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6863 states, 6862 states have (on average 2.652287962693092) internal successors, (18200), 6862 states have internal predecessors, (18200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:40,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6863 states to 6863 states and 18200 transitions. [2021-06-05 21:05:40,833 INFO L78 Accepts]: Start accepts. Automaton has 6863 states and 18200 transitions. Word has length 47 [2021-06-05 21:05:40,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:05:40,833 INFO L482 AbstractCegarLoop]: Abstraction has 6863 states and 18200 transitions. [2021-06-05 21:05:40,833 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:40,834 INFO L276 IsEmpty]: Start isEmpty. Operand 6863 states and 18200 transitions. [2021-06-05 21:05:40,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 21:05:40,837 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:05:40,837 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:05:41,037 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable501 [2021-06-05 21:05:41,038 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:05:41,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:05:41,038 INFO L82 PathProgramCache]: Analyzing trace with hash -1400811563, now seen corresponding path program 135 times [2021-06-05 21:05:41,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:05:41,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906264913] [2021-06-05 21:05:41,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:05:41,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:05:41,120 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 14 proven. 81 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:05:41,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:05:41,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906264913] [2021-06-05 21:05:41,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906264913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:41,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457271096] [2021-06-05 21:05:41,121 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:05:41,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 21:05:41,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:05:41,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:05:41,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:05:41,267 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 84 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:05:41,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457271096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:41,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:05:41,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 21:05:41,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109265131] [2021-06-05 21:05:41,267 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:05:41,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:05:41,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:05:41,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:05:41,268 INFO L87 Difference]: Start difference. First operand 6863 states and 18200 transitions. Second operand has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 13 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:41,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:05:41,562 INFO L93 Difference]: Finished difference Result 6912 states and 18275 transitions. [2021-06-05 21:05:41,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:05:41,562 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 13 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 21:05:41,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:05:41,569 INFO L225 Difference]: With dead ends: 6912 [2021-06-05 21:05:41,569 INFO L226 Difference]: Without dead ends: 6880 [2021-06-05 21:05:41,569 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 105.3ms TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:05:41,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6880 states. [2021-06-05 21:05:41,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6880 to 6863. [2021-06-05 21:05:41,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6863 states, 6862 states have (on average 2.6514135820460507) internal successors, (18194), 6862 states have internal predecessors, (18194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:41,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6863 states to 6863 states and 18194 transitions. [2021-06-05 21:05:41,641 INFO L78 Accepts]: Start accepts. Automaton has 6863 states and 18194 transitions. Word has length 47 [2021-06-05 21:05:41,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:05:41,642 INFO L482 AbstractCegarLoop]: Abstraction has 6863 states and 18194 transitions. [2021-06-05 21:05:41,642 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 13 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:41,642 INFO L276 IsEmpty]: Start isEmpty. Operand 6863 states and 18194 transitions. [2021-06-05 21:05:41,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 21:05:41,646 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:05:41,646 INFO L554 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:05:41,846 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable502 [2021-06-05 21:05:41,846 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:05:41,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:05:41,847 INFO L82 PathProgramCache]: Analyzing trace with hash 118327946, now seen corresponding path program 136 times [2021-06-05 21:05:41,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:05:41,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625854860] [2021-06-05 21:05:41,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:05:41,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:05:41,911 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 43 proven. 54 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:05:41,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:05:41,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625854860] [2021-06-05 21:05:41,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625854860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:41,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111239587] [2021-06-05 21:05:41,912 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:05:41,936 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:05:41,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:05:41,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:05:41,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:05:42,028 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 72 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:05:42,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111239587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:42,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:05:42,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-05 21:05:42,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669942976] [2021-06-05 21:05:42,028 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:05:42,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:05:42,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:05:42,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:05:42,029 INFO L87 Difference]: Start difference. First operand 6863 states and 18194 transitions. Second operand has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:42,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:05:42,255 INFO L93 Difference]: Finished difference Result 8816 states and 22216 transitions. [2021-06-05 21:05:42,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:05:42,255 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 21:05:42,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:05:42,264 INFO L225 Difference]: With dead ends: 8816 [2021-06-05 21:05:42,264 INFO L226 Difference]: Without dead ends: 8816 [2021-06-05 21:05:42,264 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 88.6ms TimeCoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:05:42,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8816 states. [2021-06-05 21:05:42,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8816 to 7200. [2021-06-05 21:05:42,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7200 states, 7199 states have (on average 2.6677316293929714) internal successors, (19205), 7199 states have internal predecessors, (19205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:42,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7200 states to 7200 states and 19205 transitions. [2021-06-05 21:05:42,359 INFO L78 Accepts]: Start accepts. Automaton has 7200 states and 19205 transitions. Word has length 47 [2021-06-05 21:05:42,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:05:42,359 INFO L482 AbstractCegarLoop]: Abstraction has 7200 states and 19205 transitions. [2021-06-05 21:05:42,360 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:42,360 INFO L276 IsEmpty]: Start isEmpty. Operand 7200 states and 19205 transitions. [2021-06-05 21:05:42,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 21:05:42,364 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:05:42,364 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:05:42,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable503,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:05:42,564 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:05:42,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:05:42,565 INFO L82 PathProgramCache]: Analyzing trace with hash -652507721, now seen corresponding path program 68 times [2021-06-05 21:05:42,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:05:42,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837549925] [2021-06-05 21:05:42,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:05:42,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:05:42,635 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:05:42,635 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:05:42,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837549925] [2021-06-05 21:05:42,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837549925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:42,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477559027] [2021-06-05 21:05:42,635 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:05:42,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:05:42,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:05:42,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:05:42,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:05:42,726 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:05:42,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477559027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:42,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:05:42,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 21:05:42,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729121664] [2021-06-05 21:05:42,727 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:05:42,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:05:42,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:05:42,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:05:42,727 INFO L87 Difference]: Start difference. First operand 7200 states and 19205 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:43,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:05:43,066 INFO L93 Difference]: Finished difference Result 8160 states and 21168 transitions. [2021-06-05 21:05:43,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:05:43,066 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 21:05:43,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:05:43,074 INFO L225 Difference]: With dead ends: 8160 [2021-06-05 21:05:43,074 INFO L226 Difference]: Without dead ends: 8160 [2021-06-05 21:05:43,074 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 125.5ms TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:05:43,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8160 states. [2021-06-05 21:05:43,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8160 to 7218. [2021-06-05 21:05:43,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7218 states, 7217 states have (on average 2.668144658445337) internal successors, (19256), 7217 states have internal predecessors, (19256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:43,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7218 states to 7218 states and 19256 transitions. [2021-06-05 21:05:43,153 INFO L78 Accepts]: Start accepts. Automaton has 7218 states and 19256 transitions. Word has length 47 [2021-06-05 21:05:43,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:05:43,153 INFO L482 AbstractCegarLoop]: Abstraction has 7218 states and 19256 transitions. [2021-06-05 21:05:43,153 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:43,154 INFO L276 IsEmpty]: Start isEmpty. Operand 7218 states and 19256 transitions. [2021-06-05 21:05:43,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 21:05:43,158 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:05:43,158 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:05:43,358 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable506,255 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:05:43,358 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:05:43,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:05:43,358 INFO L82 PathProgramCache]: Analyzing trace with hash 2009163191, now seen corresponding path program 137 times [2021-06-05 21:05:43,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:05:43,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868582442] [2021-06-05 21:05:43,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:05:43,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:05:43,436 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 14 proven. 81 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:05:43,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:05:43,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868582442] [2021-06-05 21:05:43,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868582442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:43,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400838682] [2021-06-05 21:05:43,437 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 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:05:43,471 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 21:05:43,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:05:43,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:05:43,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:05:43,568 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 84 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:05:43,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400838682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:43,568 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:05:43,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 21:05:43,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134761625] [2021-06-05 21:05:43,569 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:05:43,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:05:43,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:05:43,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:05:43,569 INFO L87 Difference]: Start difference. First operand 7218 states and 19256 transitions. Second operand has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:43,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:05:43,862 INFO L93 Difference]: Finished difference Result 7286 states and 19355 transitions. [2021-06-05 21:05:43,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:05:43,863 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 21:05:43,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:05:43,870 INFO L225 Difference]: With dead ends: 7286 [2021-06-05 21:05:43,871 INFO L226 Difference]: Without dead ends: 7266 [2021-06-05 21:05:43,871 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 93.6ms TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:05:43,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7266 states. [2021-06-05 21:05:43,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7266 to 7218. [2021-06-05 21:05:43,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7218 states, 7217 states have (on average 2.6677289732575864) internal successors, (19253), 7217 states have internal predecessors, (19253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:43,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7218 states to 7218 states and 19253 transitions. [2021-06-05 21:05:43,957 INFO L78 Accepts]: Start accepts. Automaton has 7218 states and 19253 transitions. Word has length 47 [2021-06-05 21:05:43,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:05:43,957 INFO L482 AbstractCegarLoop]: Abstraction has 7218 states and 19253 transitions. [2021-06-05 21:05:43,957 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:43,957 INFO L276 IsEmpty]: Start isEmpty. Operand 7218 states and 19253 transitions. [2021-06-05 21:05:43,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 21:05:43,961 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:05:43,961 INFO L554 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:05:44,161 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable507,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:05:44,162 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:05:44,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:05:44,162 INFO L82 PathProgramCache]: Analyzing trace with hash -732216406, now seen corresponding path program 69 times [2021-06-05 21:05:44,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:05:44,162 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132775580] [2021-06-05 21:05:44,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:05:44,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:05:44,220 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 42 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:05:44,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:05:44,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132775580] [2021-06-05 21:05:44,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132775580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:44,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384818904] [2021-06-05 21:05:44,220 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:05:44,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 21:05:44,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:05:44,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 21:05:44,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:05:44,332 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 43 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:05:44,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384818904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:44,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:05:44,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 11 [2021-06-05 21:05:44,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232112497] [2021-06-05 21:05:44,333 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:05:44,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:05:44,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:05:44,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:05:44,333 INFO L87 Difference]: Start difference. First operand 7218 states and 19253 transitions. Second operand has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:44,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:05:44,556 INFO L93 Difference]: Finished difference Result 7894 states and 20581 transitions. [2021-06-05 21:05:44,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:05:44,557 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 21:05:44,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:05:44,568 INFO L225 Difference]: With dead ends: 7894 [2021-06-05 21:05:44,568 INFO L226 Difference]: Without dead ends: 7878 [2021-06-05 21:05:44,568 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 71.4ms TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:05:44,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7878 states. [2021-06-05 21:05:44,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7878 to 7218. [2021-06-05 21:05:44,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7218 states, 7217 states have (on average 2.6667590411528335) internal successors, (19246), 7217 states have internal predecessors, (19246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:44,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7218 states to 7218 states and 19246 transitions. [2021-06-05 21:05:44,679 INFO L78 Accepts]: Start accepts. Automaton has 7218 states and 19246 transitions. Word has length 47 [2021-06-05 21:05:44,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:05:44,679 INFO L482 AbstractCegarLoop]: Abstraction has 7218 states and 19246 transitions. [2021-06-05 21:05:44,679 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:44,679 INFO L276 IsEmpty]: Start isEmpty. Operand 7218 states and 19246 transitions. [2021-06-05 21:05:44,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 21:05:44,684 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:05:44,684 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:05:44,886 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable508,257 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:05:44,886 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:05:44,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:05:44,886 INFO L82 PathProgramCache]: Analyzing trace with hash 330606421, now seen corresponding path program 70 times [2021-06-05 21:05:44,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:05:44,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189726131] [2021-06-05 21:05:44,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:05:44,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:05:44,955 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:05:44,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:05:44,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189726131] [2021-06-05 21:05:44,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189726131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:44,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624661830] [2021-06-05 21:05:44,955 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:05:44,982 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:05:44,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:05:44,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:05:44,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:05:45,050 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:05:45,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624661830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:45,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:05:45,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 21:05:45,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045594279] [2021-06-05 21:05:45,051 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:05:45,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:05:45,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:05:45,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:05:45,051 INFO L87 Difference]: Start difference. First operand 7218 states and 19246 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:45,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:05:45,379 INFO L93 Difference]: Finished difference Result 7863 states and 20502 transitions. [2021-06-05 21:05:45,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:05:45,380 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 21:05:45,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:05:45,387 INFO L225 Difference]: With dead ends: 7863 [2021-06-05 21:05:45,387 INFO L226 Difference]: Without dead ends: 7855 [2021-06-05 21:05:45,387 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 101.7ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:05:45,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7855 states. [2021-06-05 21:05:45,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7855 to 7285. [2021-06-05 21:05:45,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7285 states, 7284 states have (on average 2.6633717737506863) internal successors, (19400), 7284 states have internal predecessors, (19400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:45,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7285 states to 7285 states and 19400 transitions. [2021-06-05 21:05:45,478 INFO L78 Accepts]: Start accepts. Automaton has 7285 states and 19400 transitions. Word has length 47 [2021-06-05 21:05:45,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:05:45,478 INFO L482 AbstractCegarLoop]: Abstraction has 7285 states and 19400 transitions. [2021-06-05 21:05:45,478 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:45,479 INFO L276 IsEmpty]: Start isEmpty. Operand 7285 states and 19400 transitions. [2021-06-05 21:05:45,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 21:05:45,483 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:05:45,483 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:05:45,683 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 258 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable512 [2021-06-05 21:05:45,683 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:05:45,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:05:45,684 INFO L82 PathProgramCache]: Analyzing trace with hash 1830939413, now seen corresponding path program 138 times [2021-06-05 21:05:45,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:05:45,684 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734577900] [2021-06-05 21:05:45,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:05:45,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:05:45,752 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 15 proven. 80 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:05:45,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:05:45,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734577900] [2021-06-05 21:05:45,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734577900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:45,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727961953] [2021-06-05 21:05:45,753 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:05:45,779 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 21:05:45,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:05:45,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:05:45,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:05:45,859 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 84 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:05:45,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727961953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:45,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:05:45,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 21:05:45,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648010772] [2021-06-05 21:05:45,860 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:05:45,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:05:45,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:05:45,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:05:45,860 INFO L87 Difference]: Start difference. First operand 7285 states and 19400 transitions. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:46,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:05:46,256 INFO L93 Difference]: Finished difference Result 7653 states and 20013 transitions. [2021-06-05 21:05:46,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:05:46,257 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 21:05:46,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:05:46,265 INFO L225 Difference]: With dead ends: 7653 [2021-06-05 21:05:46,266 INFO L226 Difference]: Without dead ends: 7538 [2021-06-05 21:05:46,266 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 101.9ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:05:46,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7538 states. [2021-06-05 21:05:46,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7538 to 7173. [2021-06-05 21:05:46,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7173 states, 7172 states have (on average 2.668293363078639) internal successors, (19137), 7172 states have internal predecessors, (19137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:46,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7173 states to 7173 states and 19137 transitions. [2021-06-05 21:05:46,357 INFO L78 Accepts]: Start accepts. Automaton has 7173 states and 19137 transitions. Word has length 47 [2021-06-05 21:05:46,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:05:46,357 INFO L482 AbstractCegarLoop]: Abstraction has 7173 states and 19137 transitions. [2021-06-05 21:05:46,357 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) [2021-06-05 21:05:46,357 INFO L276 IsEmpty]: Start isEmpty. Operand 7173 states and 19137 transitions. [2021-06-05 21:05:46,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 21:05:46,361 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:05:46,362 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:05:46,562 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable513 [2021-06-05 21:05:46,562 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:05:46,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:05:46,562 INFO L82 PathProgramCache]: Analyzing trace with hash 1217403233, now seen corresponding path program 139 times [2021-06-05 21:05:46,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:05:46,562 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356182230] [2021-06-05 21:05:46,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:05:46,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:05:46,630 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 81 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:05:46,630 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:05:46,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356182230] [2021-06-05 21:05:46,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356182230] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:46,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698973544] [2021-06-05 21:05:46,630 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:05:46,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:05:46,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:05:46,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:05:46,757 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 82 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:05:46,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698973544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:46,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:05:46,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 21:05:46,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790898324] [2021-06-05 21:05:46,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:05:46,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:05:46,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:05:46,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:05:46,757 INFO L87 Difference]: Start difference. First operand 7173 states and 19137 transitions. Second operand has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:47,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:05:47,055 INFO L93 Difference]: Finished difference Result 7696 states and 20154 transitions. [2021-06-05 21:05:47,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:05:47,055 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 21:05:47,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:05:47,063 INFO L225 Difference]: With dead ends: 7696 [2021-06-05 21:05:47,064 INFO L226 Difference]: Without dead ends: 7684 [2021-06-05 21:05:47,064 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 100.7ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:05:47,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7684 states. [2021-06-05 21:05:47,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7684 to 7175. [2021-06-05 21:05:47,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7175 states, 7174 states have (on average 2.6681070532478395) internal successors, (19141), 7174 states have internal predecessors, (19141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:47,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7175 states to 7175 states and 19141 transitions. [2021-06-05 21:05:47,147 INFO L78 Accepts]: Start accepts. Automaton has 7175 states and 19141 transitions. Word has length 47 [2021-06-05 21:05:47,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:05:47,147 INFO L482 AbstractCegarLoop]: Abstraction has 7175 states and 19141 transitions. [2021-06-05 21:05:47,147 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:47,147 INFO L276 IsEmpty]: Start isEmpty. Operand 7175 states and 19141 transitions. [2021-06-05 21:05:47,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 21:05:47,151 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:05:47,151 INFO L554 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:05:47,351 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable514,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:05:47,351 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:05:47,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:05:47,352 INFO L82 PathProgramCache]: Analyzing trace with hash -430954270, now seen corresponding path program 140 times [2021-06-05 21:05:47,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:05:47,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369278875] [2021-06-05 21:05:47,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:05:47,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:05:47,410 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 40 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:05:47,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:05:47,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369278875] [2021-06-05 21:05:47,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369278875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:47,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381938577] [2021-06-05 21:05:47,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:05:47,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:05:47,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:05:47,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 21:05:47,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:05:47,499 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 40 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:05:47,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381938577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:47,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:05:47,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 21:05:47,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039159007] [2021-06-05 21:05:47,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:05:47,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:05:47,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:05:47,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:05:47,500 INFO L87 Difference]: Start difference. First operand 7175 states and 19141 transitions. Second operand has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:47,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:05:47,623 INFO L93 Difference]: Finished difference Result 8501 states and 21546 transitions. [2021-06-05 21:05:47,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:05:47,623 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 21:05:47,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:05:47,633 INFO L225 Difference]: With dead ends: 8501 [2021-06-05 21:05:47,633 INFO L226 Difference]: Without dead ends: 8495 [2021-06-05 21:05:47,633 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 53.8ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:05:47,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8495 states. [2021-06-05 21:05:47,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8495 to 7174. [2021-06-05 21:05:47,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7174 states, 7173 states have (on average 2.6675031367628605) internal successors, (19134), 7173 states have internal predecessors, (19134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:47,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7174 states to 7174 states and 19134 transitions. [2021-06-05 21:05:47,740 INFO L78 Accepts]: Start accepts. Automaton has 7174 states and 19134 transitions. Word has length 47 [2021-06-05 21:05:47,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:05:47,740 INFO L482 AbstractCegarLoop]: Abstraction has 7174 states and 19134 transitions. [2021-06-05 21:05:47,740 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:47,740 INFO L276 IsEmpty]: Start isEmpty. Operand 7174 states and 19134 transitions. [2021-06-05 21:05:47,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 21:05:47,745 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:05:47,745 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:05:47,945 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable515,261 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:05:47,945 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:05:47,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:05:47,945 INFO L82 PathProgramCache]: Analyzing trace with hash -935646729, now seen corresponding path program 141 times [2021-06-05 21:05:47,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:05:47,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674379046] [2021-06-05 21:05:47,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:05:47,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:05:48,011 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 82 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:05:48,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:05:48,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674379046] [2021-06-05 21:05:48,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674379046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:48,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948215804] [2021-06-05 21:05:48,012 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:05:48,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 21:05:48,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:05:48,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:05:48,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:05:48,107 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 83 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:05:48,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948215804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:48,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:05:48,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 21:05:48,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230097607] [2021-06-05 21:05:48,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:05:48,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:05:48,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:05:48,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:05:48,108 INFO L87 Difference]: Start difference. First operand 7174 states and 19134 transitions. Second operand has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:48,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:05:48,573 INFO L93 Difference]: Finished difference Result 8738 states and 22335 transitions. [2021-06-05 21:05:48,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 21:05:48,573 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 21:05:48,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:05:48,582 INFO L225 Difference]: With dead ends: 8738 [2021-06-05 21:05:48,582 INFO L226 Difference]: Without dead ends: 8684 [2021-06-05 21:05:48,582 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 191.4ms TimeCoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:05:48,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8684 states. [2021-06-05 21:05:48,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8684 to 7281. [2021-06-05 21:05:48,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7281 states, 7280 states have (on average 2.6664835164835163) internal successors, (19412), 7280 states have internal predecessors, (19412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:48,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7281 states to 7281 states and 19412 transitions. [2021-06-05 21:05:48,670 INFO L78 Accepts]: Start accepts. Automaton has 7281 states and 19412 transitions. Word has length 47 [2021-06-05 21:05:48,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:05:48,670 INFO L482 AbstractCegarLoop]: Abstraction has 7281 states and 19412 transitions. [2021-06-05 21:05:48,670 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:48,671 INFO L276 IsEmpty]: Start isEmpty. Operand 7281 states and 19412 transitions. [2021-06-05 21:05:48,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 21:05:48,675 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:05:48,675 INFO L554 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:05:48,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable518,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:05:48,877 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:05:48,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:05:48,877 INFO L82 PathProgramCache]: Analyzing trace with hash 596912380, now seen corresponding path program 142 times [2021-06-05 21:05:48,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:05:48,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115416758] [2021-06-05 21:05:48,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:05:48,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:05:48,947 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:05:48,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:05:48,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115416758] [2021-06-05 21:05:48,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115416758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:48,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14309203] [2021-06-05 21:05:48,947 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:05:48,972 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:05:48,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:05:48,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 21:05:48,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:05:49,041 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:05:49,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14309203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:49,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:05:49,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 21:05:49,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896125697] [2021-06-05 21:05:49,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:05:49,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:05:49,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:05:49,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:05:49,042 INFO L87 Difference]: Start difference. First operand 7281 states and 19412 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:49,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:05:49,224 INFO L93 Difference]: Finished difference Result 8660 states and 21915 transitions. [2021-06-05 21:05:49,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:05:49,224 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 21:05:49,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:05:49,236 INFO L225 Difference]: With dead ends: 8660 [2021-06-05 21:05:49,236 INFO L226 Difference]: Without dead ends: 8642 [2021-06-05 21:05:49,236 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 68.0ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:05:49,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8642 states. [2021-06-05 21:05:49,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8642 to 7281. [2021-06-05 21:05:49,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7281 states, 7280 states have (on average 2.665521978021978) internal successors, (19405), 7280 states have internal predecessors, (19405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:49,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7281 states to 7281 states and 19405 transitions. [2021-06-05 21:05:49,375 INFO L78 Accepts]: Start accepts. Automaton has 7281 states and 19405 transitions. Word has length 47 [2021-06-05 21:05:49,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:05:49,375 INFO L482 AbstractCegarLoop]: Abstraction has 7281 states and 19405 transitions. [2021-06-05 21:05:49,375 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:49,375 INFO L276 IsEmpty]: Start isEmpty. Operand 7281 states and 19405 transitions. [2021-06-05 21:05:49,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 21:05:49,380 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:05:49,380 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:05:49,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable519,263 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:05:49,580 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:05:49,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:05:49,581 INFO L82 PathProgramCache]: Analyzing trace with hash -780810195, now seen corresponding path program 143 times [2021-06-05 21:05:49,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:05:49,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614714099] [2021-06-05 21:05:49,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:05:49,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:05:49,690 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 82 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:05:49,690 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:05:49,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614714099] [2021-06-05 21:05:49,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614714099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:49,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718549075] [2021-06-05 21:05:49,690 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:05:49,718 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 21:05:49,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:05:49,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:05:49,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:05:49,783 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 83 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:05:49,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718549075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:49,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:05:49,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 21:05:49,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077616406] [2021-06-05 21:05:49,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:05:49,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:05:49,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:05:49,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:05:49,784 INFO L87 Difference]: Start difference. First operand 7281 states and 19405 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:50,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:05:50,531 INFO L93 Difference]: Finished difference Result 11178 states and 27510 transitions. [2021-06-05 21:05:50,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 21:05:50,532 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 21:05:50,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:05:50,543 INFO L225 Difference]: With dead ends: 11178 [2021-06-05 21:05:50,543 INFO L226 Difference]: Without dead ends: 11010 [2021-06-05 21:05:50,543 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 384.8ms TimeCoverageRelationStatistics Valid=267, Invalid=1895, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 21:05:50,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11010 states. [2021-06-05 21:05:50,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11010 to 7582. [2021-06-05 21:05:50,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7582 states, 7581 states have (on average 2.6559820604141935) internal successors, (20135), 7581 states have internal predecessors, (20135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:50,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7582 states to 7582 states and 20135 transitions. [2021-06-05 21:05:50,658 INFO L78 Accepts]: Start accepts. Automaton has 7582 states and 20135 transitions. Word has length 47 [2021-06-05 21:05:50,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:05:50,658 INFO L482 AbstractCegarLoop]: Abstraction has 7582 states and 20135 transitions. [2021-06-05 21:05:50,658 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:50,658 INFO L276 IsEmpty]: Start isEmpty. Operand 7582 states and 20135 transitions. [2021-06-05 21:05:50,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 21:05:50,663 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:05:50,663 INFO L554 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:05:50,863 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable523 [2021-06-05 21:05:50,863 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:05:50,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:05:50,863 INFO L82 PathProgramCache]: Analyzing trace with hash -394207518, now seen corresponding path program 144 times [2021-06-05 21:05:50,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:05:50,864 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37366418] [2021-06-05 21:05:50,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:05:50,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:05:50,932 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 31 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:05:50,932 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:05:50,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37366418] [2021-06-05 21:05:50,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37366418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:50,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758740755] [2021-06-05 21:05:50,932 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:05:50,959 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 21:05:50,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:05:50,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 21:05:50,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:05:51,043 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 31 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:05:51,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758740755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:51,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:05:51,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 21:05:51,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040639708] [2021-06-05 21:05:51,043 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:05:51,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:05:51,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:05:51,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:05:51,044 INFO L87 Difference]: Start difference. First operand 7582 states and 20135 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:51,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:05:51,200 INFO L93 Difference]: Finished difference Result 9069 states and 22840 transitions. [2021-06-05 21:05:51,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:05:51,200 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 21:05:51,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:05:51,210 INFO L225 Difference]: With dead ends: 9069 [2021-06-05 21:05:51,210 INFO L226 Difference]: Without dead ends: 9042 [2021-06-05 21:05:51,210 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 81.4ms TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:05:51,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9042 states. [2021-06-05 21:05:51,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9042 to 7582. [2021-06-05 21:05:51,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7582 states, 7581 states have (on average 2.6555863342566943) internal successors, (20132), 7581 states have internal predecessors, (20132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:51,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7582 states to 7582 states and 20132 transitions. [2021-06-05 21:05:51,313 INFO L78 Accepts]: Start accepts. Automaton has 7582 states and 20132 transitions. Word has length 47 [2021-06-05 21:05:51,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:05:51,313 INFO L482 AbstractCegarLoop]: Abstraction has 7582 states and 20132 transitions. [2021-06-05 21:05:51,313 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:51,313 INFO L276 IsEmpty]: Start isEmpty. Operand 7582 states and 20132 transitions. [2021-06-05 21:05:51,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 21:05:51,317 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:05:51,317 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:05:51,517 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 265 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable524 [2021-06-05 21:05:51,517 INFO L430 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:05:51,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:05:51,518 INFO L82 PathProgramCache]: Analyzing trace with hash -840501705, now seen corresponding path program 145 times [2021-06-05 21:05:51,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:05:51,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39336884] [2021-06-05 21:05:51,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:05:51,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:05:51,603 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 82 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:05:51,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:05:51,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39336884] [2021-06-05 21:05:51,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39336884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:51,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749730947] [2021-06-05 21:05:51,603 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:05:51,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:05:51,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 21:05:51,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:05:51,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:05:51,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2021-06-05 21:05:51,738 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:05:51,739 INFO L628 ElimStorePlain]: treesize reduction 20, result has 4.8 percent of original size [2021-06-05 21:05:51,739 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-06-05 21:05:51,740 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:05:51,740 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:1 [2021-06-05 21:05:51,746 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 16 proven. 79 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:05:51,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749730947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:51,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:05:51,746 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 21:05:51,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861276714] [2021-06-05 21:05:51,747 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:05:51,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:05:51,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:05:51,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:05:51,747 INFO L87 Difference]: Start difference. First operand 7582 states and 20132 transitions. Second operand has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:53,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:05:53,056 INFO L93 Difference]: Finished difference Result 16993 states and 39932 transitions. [2021-06-05 21:05:53,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-06-05 21:05:53,056 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 21:05:53,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:05:53,071 INFO L225 Difference]: With dead ends: 16993 [2021-06-05 21:05:53,072 INFO L226 Difference]: Without dead ends: 16471 [2021-06-05 21:05:53,072 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2193 ImplicationChecksByTransitivity, 792.3ms TimeCoverageRelationStatistics Valid=645, Invalid=5517, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 21:05:53,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16471 states. [2021-06-05 21:05:53,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16471 to 8142. [2021-06-05 21:05:53,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8142 states, 8141 states have (on average 2.6381279941039186) internal successors, (21477), 8141 states have internal predecessors, (21477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:53,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8142 states to 8142 states and 21477 transitions. [2021-06-05 21:05:53,219 INFO L78 Accepts]: Start accepts. Automaton has 8142 states and 21477 transitions. Word has length 47 [2021-06-05 21:05:53,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:05:53,219 INFO L482 AbstractCegarLoop]: Abstraction has 8142 states and 21477 transitions. [2021-06-05 21:05:53,220 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:53,220 INFO L276 IsEmpty]: Start isEmpty. Operand 8142 states and 21477 transitions. [2021-06-05 21:05:53,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 21:05:53,224 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:05:53,224 INFO L554 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:05:53,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable529 [2021-06-05 21:05:53,425 INFO L430 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:05:53,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:05:53,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1053071164, now seen corresponding path program 146 times [2021-06-05 21:05:53,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:05:53,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428306378] [2021-06-05 21:05:53,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:05:53,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:05:53,502 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 32 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:05:53,503 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:05:53,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428306378] [2021-06-05 21:05:53,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428306378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:53,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797515712] [2021-06-05 21:05:53,503 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:05:53,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:05:53,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:05:53,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 21:05:53,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:05:53,594 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 32 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:05:53,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797515712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:53,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:05:53,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-05 21:05:53,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037000086] [2021-06-05 21:05:53,595 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:05:53,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:05:53,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:05:53,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:05:53,595 INFO L87 Difference]: Start difference. First operand 8142 states and 21477 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:53,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:05:53,780 INFO L93 Difference]: Finished difference Result 9828 states and 24560 transitions. [2021-06-05 21:05:53,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:05:53,781 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 21:05:53,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:05:53,790 INFO L225 Difference]: With dead ends: 9828 [2021-06-05 21:05:53,790 INFO L226 Difference]: Without dead ends: 9792 [2021-06-05 21:05:53,790 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 99.4ms TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:05:53,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9792 states. [2021-06-05 21:05:53,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9792 to 8142. [2021-06-05 21:05:53,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8142 states, 8141 states have (on average 2.637759489006265) internal successors, (21474), 8141 states have internal predecessors, (21474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:53,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8142 states to 8142 states and 21474 transitions. [2021-06-05 21:05:53,893 INFO L78 Accepts]: Start accepts. Automaton has 8142 states and 21474 transitions. Word has length 47 [2021-06-05 21:05:53,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:05:53,894 INFO L482 AbstractCegarLoop]: Abstraction has 8142 states and 21474 transitions. [2021-06-05 21:05:53,894 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:53,894 INFO L276 IsEmpty]: Start isEmpty. Operand 8142 states and 21474 transitions. [2021-06-05 21:05:53,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 21:05:53,898 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:05:53,898 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:05:54,098 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 267 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable530 [2021-06-05 21:05:54,098 INFO L430 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:05:54,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:05:54,099 INFO L82 PathProgramCache]: Analyzing trace with hash -993815571, now seen corresponding path program 147 times [2021-06-05 21:05:54,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:05:54,099 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022571294] [2021-06-05 21:05:54,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:05:54,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:05:54,192 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 82 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:05:54,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:05:54,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022571294] [2021-06-05 21:05:54,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022571294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:54,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308054849] [2021-06-05 21:05:54,193 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:05:54,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 21:05:54,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:05:54,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:05:54,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:05:54,286 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 83 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:05:54,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308054849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:54,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:05:54,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 21:05:54,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290577855] [2021-06-05 21:05:54,286 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:05:54,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:05:54,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:05:54,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:05:54,286 INFO L87 Difference]: Start difference. First operand 8142 states and 21474 transitions. Second operand has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:56,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:05:56,265 INFO L93 Difference]: Finished difference Result 19383 states and 45637 transitions. [2021-06-05 21:05:56,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2021-06-05 21:05:56,266 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 21:05:56,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:05:56,286 INFO L225 Difference]: With dead ends: 19383 [2021-06-05 21:05:56,286 INFO L226 Difference]: Without dead ends: 18765 [2021-06-05 21:05:56,287 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6450 ImplicationChecksByTransitivity, 1456.4ms TimeCoverageRelationStatistics Valid=1455, Invalid=14547, Unknown=0, NotChecked=0, Total=16002 [2021-06-05 21:05:56,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18765 states. [2021-06-05 21:05:56,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18765 to 8971. [2021-06-05 21:05:56,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8971 states, 8970 states have (on average 2.618283166109253) internal successors, (23486), 8970 states have internal predecessors, (23486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:56,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8971 states to 8971 states and 23486 transitions. [2021-06-05 21:05:56,448 INFO L78 Accepts]: Start accepts. Automaton has 8971 states and 23486 transitions. Word has length 47 [2021-06-05 21:05:56,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:05:56,448 INFO L482 AbstractCegarLoop]: Abstraction has 8971 states and 23486 transitions. [2021-06-05 21:05:56,448 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:56,448 INFO L276 IsEmpty]: Start isEmpty. Operand 8971 states and 23486 transitions. [2021-06-05 21:05:56,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 21:05:56,453 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:05:56,453 INFO L554 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:05:56,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable536 [2021-06-05 21:05:56,653 INFO L430 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:05:56,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:05:56,654 INFO L82 PathProgramCache]: Analyzing trace with hash -244397918, now seen corresponding path program 148 times [2021-06-05 21:05:56,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:05:56,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999100867] [2021-06-05 21:05:56,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:05:56,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:05:56,741 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 39 proven. 59 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:05:56,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:05:56,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999100867] [2021-06-05 21:05:56,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999100867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:56,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368494248] [2021-06-05 21:05:56,742 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:05:56,766 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:05:56,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:05:56,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 21:05:56,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:05:56,847 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 39 proven. 59 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:05:56,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368494248] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:56,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:05:56,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-06-05 21:05:56,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211257583] [2021-06-05 21:05:56,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:05:56,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:05:56,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:05:56,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:05:56,848 INFO L87 Difference]: Start difference. First operand 8971 states and 23486 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:57,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:05:57,052 INFO L93 Difference]: Finished difference Result 11009 states and 27233 transitions. [2021-06-05 21:05:57,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:05:57,053 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 21:05:57,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:05:57,065 INFO L225 Difference]: With dead ends: 11009 [2021-06-05 21:05:57,065 INFO L226 Difference]: Without dead ends: 10964 [2021-06-05 21:05:57,066 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 119.5ms TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:05:57,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10964 states. [2021-06-05 21:05:57,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10964 to 8971. [2021-06-05 21:05:57,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8971 states, 8970 states have (on average 2.617948717948718) internal successors, (23483), 8970 states have internal predecessors, (23483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:57,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8971 states to 8971 states and 23483 transitions. [2021-06-05 21:05:57,194 INFO L78 Accepts]: Start accepts. Automaton has 8971 states and 23483 transitions. Word has length 47 [2021-06-05 21:05:57,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:05:57,194 INFO L482 AbstractCegarLoop]: Abstraction has 8971 states and 23483 transitions. [2021-06-05 21:05:57,194 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:57,194 INFO L276 IsEmpty]: Start isEmpty. Operand 8971 states and 23483 transitions. [2021-06-05 21:05:57,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 21:05:57,199 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:05:57,199 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:05:57,399 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable537 [2021-06-05 21:05:57,400 INFO L430 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:05:57,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:05:57,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1478005367, now seen corresponding path program 149 times [2021-06-05 21:05:57,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:05:57,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435721081] [2021-06-05 21:05:57,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:05:57,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:05:57,518 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:05:57,519 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:05:57,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435721081] [2021-06-05 21:05:57,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435721081] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:57,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270274071] [2021-06-05 21:05:57,519 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 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:05:57,594 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 21:05:57,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:05:57,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:05:57,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:05:57,662 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:05:57,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270274071] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:57,662 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:05:57,662 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:05:57,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883146563] [2021-06-05 21:05:57,662 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:05:57,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:05:57,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:05:57,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:05:57,662 INFO L87 Difference]: Start difference. First operand 8971 states and 23483 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:58,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:05:58,165 INFO L93 Difference]: Finished difference Result 11682 states and 28568 transitions. [2021-06-05 21:05:58,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:05:58,166 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 21:05:58,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:05:58,178 INFO L225 Difference]: With dead ends: 11682 [2021-06-05 21:05:58,178 INFO L226 Difference]: Without dead ends: 10842 [2021-06-05 21:05:58,178 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 290.6ms TimeCoverageRelationStatistics Valid=169, Invalid=761, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:05:58,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10842 states. [2021-06-05 21:05:58,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10842 to 6870. [2021-06-05 21:05:58,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6870 states, 6869 states have (on average 2.6869995632552044) internal successors, (18457), 6869 states have internal predecessors, (18457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:58,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6870 states to 6870 states and 18457 transitions. [2021-06-05 21:05:58,301 INFO L78 Accepts]: Start accepts. Automaton has 6870 states and 18457 transitions. Word has length 47 [2021-06-05 21:05:58,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:05:58,302 INFO L482 AbstractCegarLoop]: Abstraction has 6870 states and 18457 transitions. [2021-06-05 21:05:58,302 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:58,302 INFO L276 IsEmpty]: Start isEmpty. Operand 6870 states and 18457 transitions. [2021-06-05 21:05:58,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 21:05:58,306 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:05:58,306 INFO L554 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:05:58,506 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable544,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:05:58,506 INFO L430 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:05:58,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:05:58,506 INFO L82 PathProgramCache]: Analyzing trace with hash 1239943850, now seen corresponding path program 71 times [2021-06-05 21:05:58,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:05:58,507 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870147229] [2021-06-05 21:05:58,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:05:58,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:05:58,561 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 67 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:05:58,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:05:58,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870147229] [2021-06-05 21:05:58,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870147229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:58,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177045011] [2021-06-05 21:05:58,561 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:05:58,589 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 21:05:58,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:05:58,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 21:05:58,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:05:58,686 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 67 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:05:58,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177045011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:58,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:05:58,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 16 [2021-06-05 21:05:58,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571693372] [2021-06-05 21:05:58,687 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:05:58,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:05:58,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:05:58,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:05:58,687 INFO L87 Difference]: Start difference. First operand 6870 states and 18457 transitions. Second operand has 17 states, 17 states have (on average 4.411764705882353) internal successors, (75), 16 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:58,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:05:58,968 INFO L93 Difference]: Finished difference Result 8334 states and 21563 transitions. [2021-06-05 21:05:58,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:05:58,968 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.411764705882353) internal successors, (75), 16 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 21:05:58,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:05:58,977 INFO L225 Difference]: With dead ends: 8334 [2021-06-05 21:05:58,978 INFO L226 Difference]: Without dead ends: 8318 [2021-06-05 21:05:58,978 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 96.0ms TimeCoverageRelationStatistics Valid=118, Invalid=224, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:05:58,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8318 states. [2021-06-05 21:05:59,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8318 to 7293. [2021-06-05 21:05:59,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7293 states, 7292 states have (on average 2.686368623148656) internal successors, (19589), 7292 states have internal predecessors, (19589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:59,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7293 states to 7293 states and 19589 transitions. [2021-06-05 21:05:59,072 INFO L78 Accepts]: Start accepts. Automaton has 7293 states and 19589 transitions. Word has length 47 [2021-06-05 21:05:59,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:05:59,072 INFO L482 AbstractCegarLoop]: Abstraction has 7293 states and 19589 transitions. [2021-06-05 21:05:59,072 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.411764705882353) internal successors, (75), 16 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:59,072 INFO L276 IsEmpty]: Start isEmpty. Operand 7293 states and 19589 transitions. [2021-06-05 21:05:59,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 21:05:59,076 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:05:59,076 INFO L554 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:05:59,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 271 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable545 [2021-06-05 21:05:59,276 INFO L430 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:05:59,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:05:59,277 INFO L82 PathProgramCache]: Analyzing trace with hash 618063440, now seen corresponding path program 72 times [2021-06-05 21:05:59,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:05:59,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49264752] [2021-06-05 21:05:59,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:05:59,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:05:59,332 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 67 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:05:59,332 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:05:59,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49264752] [2021-06-05 21:05:59,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49264752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:59,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586892717] [2021-06-05 21:05:59,333 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:05:59,359 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 21:05:59,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:05:59,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 21:05:59,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:05:59,432 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 67 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:05:59,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586892717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:59,432 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:05:59,432 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 10 [2021-06-05 21:05:59,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769313923] [2021-06-05 21:05:59,432 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:05:59,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:05:59,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:05:59,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:05:59,433 INFO L87 Difference]: Start difference. First operand 7293 states and 19589 transitions. Second operand has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:59,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:05:59,714 INFO L93 Difference]: Finished difference Result 8900 states and 22808 transitions. [2021-06-05 21:05:59,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:05:59,714 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 21:05:59,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:05:59,724 INFO L225 Difference]: With dead ends: 8900 [2021-06-05 21:05:59,724 INFO L226 Difference]: Without dead ends: 8900 [2021-06-05 21:05:59,725 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 96.7ms TimeCoverageRelationStatistics Valid=113, Invalid=159, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:05:59,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8900 states. [2021-06-05 21:05:59,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8900 to 7296. [2021-06-05 21:05:59,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7296 states, 7295 states have (on average 2.6864976010966415) internal successors, (19598), 7295 states have internal predecessors, (19598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:59,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7296 states to 7296 states and 19598 transitions. [2021-06-05 21:05:59,827 INFO L78 Accepts]: Start accepts. Automaton has 7296 states and 19598 transitions. Word has length 47 [2021-06-05 21:05:59,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:05:59,827 INFO L482 AbstractCegarLoop]: Abstraction has 7296 states and 19598 transitions. [2021-06-05 21:05:59,827 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:59,827 INFO L276 IsEmpty]: Start isEmpty. Operand 7296 states and 19598 transitions. [2021-06-05 21:05:59,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 21:05:59,831 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:05:59,831 INFO L554 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:06:00,031 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable547,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:06:00,032 INFO L430 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:06:00,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:06:00,032 INFO L82 PathProgramCache]: Analyzing trace with hash -1019509016, now seen corresponding path program 73 times [2021-06-05 21:06:00,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:06:00,032 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065933038] [2021-06-05 21:06:00,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:06:00,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:06:00,095 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 68 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:06:00,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:06:00,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065933038] [2021-06-05 21:06:00,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065933038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:06:00,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965226428] [2021-06-05 21:06:00,096 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:06:00,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:06:00,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:06:00,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:06:00,209 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 69 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:06:00,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965226428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:06:00,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:06:00,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 13 [2021-06-05 21:06:00,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497218943] [2021-06-05 21:06:00,210 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:06:00,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:06:00,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:06:00,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:06:00,210 INFO L87 Difference]: Start difference. First operand 7296 states and 19598 transitions. Second operand has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:00,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:06:00,586 INFO L93 Difference]: Finished difference Result 8356 states and 21589 transitions. [2021-06-05 21:06:00,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:06:00,586 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 21:06:00,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:06:00,597 INFO L225 Difference]: With dead ends: 8356 [2021-06-05 21:06:00,597 INFO L226 Difference]: Without dead ends: 8356 [2021-06-05 21:06:00,597 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 198.4ms TimeCoverageRelationStatistics Valid=246, Invalid=404, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:06:00,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8356 states. [2021-06-05 21:06:00,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8356 to 7143. [2021-06-05 21:06:00,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7143 states, 7142 states have (on average 2.690422850742089) internal successors, (19215), 7142 states have internal predecessors, (19215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:00,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7143 states to 7143 states and 19215 transitions. [2021-06-05 21:06:00,696 INFO L78 Accepts]: Start accepts. Automaton has 7143 states and 19215 transitions. Word has length 47 [2021-06-05 21:06:00,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:06:00,696 INFO L482 AbstractCegarLoop]: Abstraction has 7143 states and 19215 transitions. [2021-06-05 21:06:00,696 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:00,696 INFO L276 IsEmpty]: Start isEmpty. Operand 7143 states and 19215 transitions. [2021-06-05 21:06:00,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 21:06:00,700 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:06:00,700 INFO L554 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:06:00,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable548,273 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:06:00,900 INFO L430 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:06:00,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:06:00,900 INFO L82 PathProgramCache]: Analyzing trace with hash 1559844220, now seen corresponding path program 150 times [2021-06-05 21:06:00,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:06:00,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081762020] [2021-06-05 21:06:00,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:06:00,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:06:01,001 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 53 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:06:01,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:06:01,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081762020] [2021-06-05 21:06:01,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081762020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:06:01,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082709026] [2021-06-05 21:06:01,001 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:06:01,029 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 21:06:01,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:06:01,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 21:06:01,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:06:01,134 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 53 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:06:01,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082709026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:06:01,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:06:01,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-05 21:06:01,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255324110] [2021-06-05 21:06:01,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:06:01,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:06:01,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:06:01,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:06:01,135 INFO L87 Difference]: Start difference. First operand 7143 states and 19215 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:01,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:06:01,361 INFO L93 Difference]: Finished difference Result 8410 states and 21506 transitions. [2021-06-05 21:06:01,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:06:01,361 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 21:06:01,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:06:01,368 INFO L225 Difference]: With dead ends: 8410 [2021-06-05 21:06:01,369 INFO L226 Difference]: Without dead ends: 8354 [2021-06-05 21:06:01,369 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 143.4ms TimeCoverageRelationStatistics Valid=132, Invalid=288, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:06:01,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8354 states. [2021-06-05 21:06:01,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8354 to 7152. [2021-06-05 21:06:01,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7152 states, 7151 states have (on average 2.6889945462173124) internal successors, (19229), 7151 states have internal predecessors, (19229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:01,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7152 states to 7152 states and 19229 transitions. [2021-06-05 21:06:01,456 INFO L78 Accepts]: Start accepts. Automaton has 7152 states and 19229 transitions. Word has length 47 [2021-06-05 21:06:01,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:06:01,456 INFO L482 AbstractCegarLoop]: Abstraction has 7152 states and 19229 transitions. [2021-06-05 21:06:01,456 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:01,457 INFO L276 IsEmpty]: Start isEmpty. Operand 7152 states and 19229 transitions. [2021-06-05 21:06:01,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-05 21:06:01,461 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:06:01,461 INFO L554 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:06:01,661 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable551,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:06:01,661 INFO L430 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:06:01,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:06:01,662 INFO L82 PathProgramCache]: Analyzing trace with hash -2086787547, now seen corresponding path program 151 times [2021-06-05 21:06:01,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:06:01,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779315343] [2021-06-05 21:06:01,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:06:01,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:06:01,726 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:06:01,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:06:01,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779315343] [2021-06-05 21:06:01,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779315343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:06:01,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582009138] [2021-06-05 21:06:01,726 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:06:01,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:06:01,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:06:01,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:06:02,006 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 51 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:06:02,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582009138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:06:02,007 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:06:02,007 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 15] total 22 [2021-06-05 21:06:02,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420774941] [2021-06-05 21:06:02,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 21:06:02,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:06:02,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 21:06:02,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:06:02,007 INFO L87 Difference]: Start difference. First operand 7152 states and 19229 transitions. Second operand has 23 states, 23 states have (on average 4.304347826086956) internal successors, (99), 22 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:03,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:06:03,157 INFO L93 Difference]: Finished difference Result 9713 states and 24252 transitions. [2021-06-05 21:06:03,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 21:06:03,157 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.304347826086956) internal successors, (99), 22 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-06-05 21:06:03,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:06:03,168 INFO L225 Difference]: With dead ends: 9713 [2021-06-05 21:06:03,168 INFO L226 Difference]: Without dead ends: 9671 [2021-06-05 21:06:03,168 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 684 ImplicationChecksByTransitivity, 653.9ms TimeCoverageRelationStatistics Valid=620, Invalid=2460, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 21:06:03,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9671 states. [2021-06-05 21:06:03,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9671 to 7802. [2021-06-05 21:06:03,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7802 states, 7801 states have (on average 2.6345340340981926) internal successors, (20552), 7801 states have internal predecessors, (20552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:03,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7802 states to 7802 states and 20552 transitions. [2021-06-05 21:06:03,273 INFO L78 Accepts]: Start accepts. Automaton has 7802 states and 20552 transitions. Word has length 50 [2021-06-05 21:06:03,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:06:03,273 INFO L482 AbstractCegarLoop]: Abstraction has 7802 states and 20552 transitions. [2021-06-05 21:06:03,273 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.304347826086956) internal successors, (99), 22 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:03,273 INFO L276 IsEmpty]: Start isEmpty. Operand 7802 states and 20552 transitions. [2021-06-05 21:06:03,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-05 21:06:03,278 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:06:03,278 INFO L554 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:06:03,478 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable559,275 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:06:03,478 INFO L430 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:06:03,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:06:03,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1860539001, now seen corresponding path program 152 times [2021-06-05 21:06:03,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:06:03,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987525330] [2021-06-05 21:06:03,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:06:03,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:06:03,535 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 21:06:03,536 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:06:03,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987525330] [2021-06-05 21:06:03,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987525330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:06:03,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132961130] [2021-06-05 21:06:03,536 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:06:03,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:06:03,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:06:03,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 21:06:03,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:06:03,624 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 21:06:03,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132961130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:06:03,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:06:03,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 21:06:03,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972633348] [2021-06-05 21:06:03,624 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:06:03,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:06:03,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:06:03,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:06:03,625 INFO L87 Difference]: Start difference. First operand 7802 states and 20552 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:03,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:06:03,870 INFO L93 Difference]: Finished difference Result 8830 states and 22462 transitions. [2021-06-05 21:06:03,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:06:03,871 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-06-05 21:06:03,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:06:03,880 INFO L225 Difference]: With dead ends: 8830 [2021-06-05 21:06:03,880 INFO L226 Difference]: Without dead ends: 8773 [2021-06-05 21:06:03,880 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 45.8ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:06:03,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8773 states. [2021-06-05 21:06:03,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8773 to 7820. [2021-06-05 21:06:03,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7820 states, 7819 states have (on average 2.632945389435989) internal successors, (20587), 7819 states have internal predecessors, (20587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:04,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7820 states to 7820 states and 20587 transitions. [2021-06-05 21:06:04,000 INFO L78 Accepts]: Start accepts. Automaton has 7820 states and 20587 transitions. Word has length 50 [2021-06-05 21:06:04,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:06:04,000 INFO L482 AbstractCegarLoop]: Abstraction has 7820 states and 20587 transitions. [2021-06-05 21:06:04,000 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:04,000 INFO L276 IsEmpty]: Start isEmpty. Operand 7820 states and 20587 transitions. [2021-06-05 21:06:04,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-05 21:06:04,005 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:06:04,005 INFO L554 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:06:04,205 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable560,276 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:06:04,206 INFO L430 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:06:04,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:06:04,206 INFO L82 PathProgramCache]: Analyzing trace with hash 1761499875, now seen corresponding path program 153 times [2021-06-05 21:06:04,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:06:04,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305100098] [2021-06-05 21:06:04,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:06:04,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:06:04,259 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 21:06:04,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:06:04,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305100098] [2021-06-05 21:06:04,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305100098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:06:04,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318824301] [2021-06-05 21:06:04,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:06:04,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-06-05 21:06:04,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:06:04,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 21:06:04,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:06:04,348 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 21:06:04,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318824301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:06:04,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:06:04,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 21:06:04,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183338226] [2021-06-05 21:06:04,348 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:06:04,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:06:04,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:06:04,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:06:04,349 INFO L87 Difference]: Start difference. First operand 7820 states and 20587 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:04,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:06:04,596 INFO L93 Difference]: Finished difference Result 8754 states and 22356 transitions. [2021-06-05 21:06:04,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:06:04,597 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-06-05 21:06:04,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:06:04,606 INFO L225 Difference]: With dead ends: 8754 [2021-06-05 21:06:04,606 INFO L226 Difference]: Without dead ends: 8694 [2021-06-05 21:06:04,606 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.9ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:06:04,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8694 states. [2021-06-05 21:06:04,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8694 to 7865. [2021-06-05 21:06:04,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7865 states, 7864 states have (on average 2.6280518819938963) internal successors, (20667), 7864 states have internal predecessors, (20667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:04,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7865 states to 7865 states and 20667 transitions. [2021-06-05 21:06:04,704 INFO L78 Accepts]: Start accepts. Automaton has 7865 states and 20667 transitions. Word has length 50 [2021-06-05 21:06:04,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:06:04,704 INFO L482 AbstractCegarLoop]: Abstraction has 7865 states and 20667 transitions. [2021-06-05 21:06:04,704 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:04,705 INFO L276 IsEmpty]: Start isEmpty. Operand 7865 states and 20667 transitions. [2021-06-05 21:06:04,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-05 21:06:04,709 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:06:04,709 INFO L554 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:06:04,910 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable561,277 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:06:04,910 INFO L430 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:06:04,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:06:04,910 INFO L82 PathProgramCache]: Analyzing trace with hash -836689913, now seen corresponding path program 154 times [2021-06-05 21:06:04,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:06:04,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206684036] [2021-06-05 21:06:04,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:06:04,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:06:04,963 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 21:06:04,964 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:06:04,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206684036] [2021-06-05 21:06:04,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206684036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:06:04,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467195165] [2021-06-05 21:06:04,964 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:06:04,988 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:06:04,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:06:04,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 21:06:04,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:06:05,049 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 21:06:05,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467195165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:06:05,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:06:05,050 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 21:06:05,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182036235] [2021-06-05 21:06:05,050 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:06:05,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:06:05,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:06:05,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:06:05,050 INFO L87 Difference]: Start difference. First operand 7865 states and 20667 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:05,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:06:05,298 INFO L93 Difference]: Finished difference Result 8782 states and 22434 transitions. [2021-06-05 21:06:05,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:06:05,299 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-06-05 21:06:05,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:06:05,308 INFO L225 Difference]: With dead ends: 8782 [2021-06-05 21:06:05,308 INFO L226 Difference]: Without dead ends: 8744 [2021-06-05 21:06:05,308 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.9ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:06:05,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8744 states. [2021-06-05 21:06:05,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8744 to 7937. [2021-06-05 21:06:05,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7937 states, 7936 states have (on average 2.62109375) internal successors, (20801), 7936 states have internal predecessors, (20801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:05,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7937 states to 7937 states and 20801 transitions. [2021-06-05 21:06:05,411 INFO L78 Accepts]: Start accepts. Automaton has 7937 states and 20801 transitions. Word has length 50 [2021-06-05 21:06:05,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:06:05,411 INFO L482 AbstractCegarLoop]: Abstraction has 7937 states and 20801 transitions. [2021-06-05 21:06:05,411 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:05,411 INFO L276 IsEmpty]: Start isEmpty. Operand 7937 states and 20801 transitions. [2021-06-05 21:06:05,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-05 21:06:05,416 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:06:05,416 INFO L554 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:06:05,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable562 [2021-06-05 21:06:05,617 INFO L430 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:06:05,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:06:05,617 INFO L82 PathProgramCache]: Analyzing trace with hash 391944291, now seen corresponding path program 155 times [2021-06-05 21:06:05,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:06:05,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632925303] [2021-06-05 21:06:05,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:06:05,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:06:05,669 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 21:06:05,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:06:05,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632925303] [2021-06-05 21:06:05,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632925303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:06:05,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386586664] [2021-06-05 21:06:05,669 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:06:05,697 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-06-05 21:06:05,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:06:05,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 21:06:05,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:06:05,758 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 21:06:05,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386586664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:06:05,758 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:06:05,758 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 21:06:05,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322293983] [2021-06-05 21:06:05,758 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:06:05,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:06:05,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:06:05,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:06:05,759 INFO L87 Difference]: Start difference. First operand 7937 states and 20801 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:06,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:06:06,005 INFO L93 Difference]: Finished difference Result 8848 states and 22578 transitions. [2021-06-05 21:06:06,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:06:06,006 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-06-05 21:06:06,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:06:06,015 INFO L225 Difference]: With dead ends: 8848 [2021-06-05 21:06:06,015 INFO L226 Difference]: Without dead ends: 8814 [2021-06-05 21:06:06,015 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.1ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:06:06,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8814 states. [2021-06-05 21:06:06,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8814 to 8036. [2021-06-05 21:06:06,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8036 states, 8035 states have (on average 2.612196639701307) internal successors, (20989), 8035 states have internal predecessors, (20989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:06,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8036 states to 8036 states and 20989 transitions. [2021-06-05 21:06:06,120 INFO L78 Accepts]: Start accepts. Automaton has 8036 states and 20989 transitions. Word has length 50 [2021-06-05 21:06:06,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:06:06,121 INFO L482 AbstractCegarLoop]: Abstraction has 8036 states and 20989 transitions. [2021-06-05 21:06:06,121 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:06,121 INFO L276 IsEmpty]: Start isEmpty. Operand 8036 states and 20989 transitions. [2021-06-05 21:06:06,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-05 21:06:06,126 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:06:06,126 INFO L554 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:06:06,326 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable563,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:06:06,326 INFO L430 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:06:06,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:06:06,327 INFO L82 PathProgramCache]: Analyzing trace with hash 922219143, now seen corresponding path program 156 times [2021-06-05 21:06:06,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:06:06,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793002913] [2021-06-05 21:06:06,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:06:06,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:06:06,379 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 21:06:06,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:06:06,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793002913] [2021-06-05 21:06:06,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793002913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:06:06,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272811903] [2021-06-05 21:06:06,380 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:06:06,407 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-06-05 21:06:06,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:06:06,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 21:06:06,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:06:06,469 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 21:06:06,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272811903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:06:06,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:06:06,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 21:06:06,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798801977] [2021-06-05 21:06:06,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:06:06,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:06:06,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:06:06,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:06:06,470 INFO L87 Difference]: Start difference. First operand 8036 states and 20989 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:06,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:06:06,720 INFO L93 Difference]: Finished difference Result 9347 states and 23857 transitions. [2021-06-05 21:06:06,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:06:06,720 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-06-05 21:06:06,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:06:06,730 INFO L225 Difference]: With dead ends: 9347 [2021-06-05 21:06:06,730 INFO L226 Difference]: Without dead ends: 9311 [2021-06-05 21:06:06,730 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.3ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:06:06,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9311 states. [2021-06-05 21:06:06,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9311 to 8477. [2021-06-05 21:06:06,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8477 states, 8476 states have (on average 2.612907031618688) internal successors, (22147), 8476 states have internal predecessors, (22147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:06,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8477 states to 8477 states and 22147 transitions. [2021-06-05 21:06:06,857 INFO L78 Accepts]: Start accepts. Automaton has 8477 states and 22147 transitions. Word has length 50 [2021-06-05 21:06:06,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:06:06,857 INFO L482 AbstractCegarLoop]: Abstraction has 8477 states and 22147 transitions. [2021-06-05 21:06:06,857 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:06,857 INFO L276 IsEmpty]: Start isEmpty. Operand 8477 states and 22147 transitions. [2021-06-05 21:06:06,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-05 21:06:06,862 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:06:06,863 INFO L554 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:06:07,063 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 280 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable564 [2021-06-05 21:06:07,063 INFO L430 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:06:07,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:06:07,063 INFO L82 PathProgramCache]: Analyzing trace with hash 1450620387, now seen corresponding path program 157 times [2021-06-05 21:06:07,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:06:07,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087961785] [2021-06-05 21:06:07,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:06:07,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:06:07,116 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:06:07,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:06:07,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087961785] [2021-06-05 21:06:07,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087961785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:06:07,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530920591] [2021-06-05 21:06:07,117 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:06:07,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:06:07,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 21:06:07,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:06:07,202 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:06:07,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530920591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:06:07,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:06:07,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 21:06:07,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186131636] [2021-06-05 21:06:07,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:06:07,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:06:07,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:06:07,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:06:07,203 INFO L87 Difference]: Start difference. First operand 8477 states and 22147 transitions. Second operand has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:07,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:06:07,450 INFO L93 Difference]: Finished difference Result 9828 states and 25051 transitions. [2021-06-05 21:06:07,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:06:07,451 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-06-05 21:06:07,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:06:07,461 INFO L225 Difference]: With dead ends: 9828 [2021-06-05 21:06:07,461 INFO L226 Difference]: Without dead ends: 9803 [2021-06-05 21:06:07,461 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.5ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:06:07,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9803 states. [2021-06-05 21:06:07,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9803 to 8967. [2021-06-05 21:06:07,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8967 states, 8966 states have (on average 2.605955833147446) internal successors, (23365), 8966 states have internal predecessors, (23365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:07,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8967 states to 8967 states and 23365 transitions. [2021-06-05 21:06:07,576 INFO L78 Accepts]: Start accepts. Automaton has 8967 states and 23365 transitions. Word has length 50 [2021-06-05 21:06:07,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:06:07,576 INFO L482 AbstractCegarLoop]: Abstraction has 8967 states and 23365 transitions. [2021-06-05 21:06:07,576 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:07,576 INFO L276 IsEmpty]: Start isEmpty. Operand 8967 states and 23365 transitions. [2021-06-05 21:06:07,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 21:06:07,583 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:06:07,583 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:06:07,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 281 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable565 [2021-06-05 21:06:07,784 INFO L430 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:06:07,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:06:07,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1040519320, now seen corresponding path program 74 times [2021-06-05 21:06:07,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:06:07,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75273380] [2021-06-05 21:06:07,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:06:07,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:06:07,924 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 127 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:06:07,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:06:07,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75273380] [2021-06-05 21:06:07,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75273380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:06:07,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904328159] [2021-06-05 21:06:07,925 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:06:07,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:06:07,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:06:07,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:06:07,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:06:08,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:06:08,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:06:08,746 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:06:08,748 INFO L628 ElimStorePlain]: treesize reduction 19, result has 5.0 percent of original size [2021-06-05 21:06:08,748 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-06-05 21:06:08,748 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:06:08,748 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:27, output treesize:1 [2021-06-05 21:06:08,754 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 52 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:06:08,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904328159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:06:08,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:06:08,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 34 [2021-06-05 21:06:08,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395615813] [2021-06-05 21:06:08,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 21:06:08,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:06:08,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 21:06:08,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1073, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 21:06:08,754 INFO L87 Difference]: Start difference. First operand 8967 states and 23365 transitions. Second operand has 35 states, 35 states have (on average 2.8285714285714287) internal successors, (99), 34 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:20,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:06:20,182 INFO L93 Difference]: Finished difference Result 20584 states and 47715 transitions. [2021-06-05 21:06:20,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 233 states. [2021-06-05 21:06:20,182 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.8285714285714287) internal successors, (99), 34 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 21:06:20,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:06:20,204 INFO L225 Difference]: With dead ends: 20584 [2021-06-05 21:06:20,205 INFO L226 Difference]: Without dead ends: 19760 [2021-06-05 21:06:20,207 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 252 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25560 ImplicationChecksByTransitivity, 9812.9ms TimeCoverageRelationStatistics Valid=7737, Invalid=56525, Unknown=0, NotChecked=0, Total=64262 [2021-06-05 21:06:20,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19760 states. [2021-06-05 21:06:20,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19760 to 9874. [2021-06-05 21:06:20,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9874 states, 9873 states have (on average 2.635976906715284) internal successors, (26025), 9873 states have internal predecessors, (26025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:20,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9874 states to 9874 states and 26025 transitions. [2021-06-05 21:06:20,395 INFO L78 Accepts]: Start accepts. Automaton has 9874 states and 26025 transitions. Word has length 53 [2021-06-05 21:06:20,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:06:20,395 INFO L482 AbstractCegarLoop]: Abstraction has 9874 states and 26025 transitions. [2021-06-05 21:06:20,395 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.8285714285714287) internal successors, (99), 34 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:20,395 INFO L276 IsEmpty]: Start isEmpty. Operand 9874 states and 26025 transitions. [2021-06-05 21:06:20,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 21:06:20,403 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:06:20,403 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:06:20,603 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable566,282 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:06:20,603 INFO L430 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:06:20,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:06:20,604 INFO L82 PathProgramCache]: Analyzing trace with hash 1328551784, now seen corresponding path program 158 times [2021-06-05 21:06:20,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:06:20,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648532800] [2021-06-05 21:06:20,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:06:20,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:06:20,749 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:06:20,749 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:06:20,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648532800] [2021-06-05 21:06:20,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648532800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:06:20,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160492848] [2021-06-05 21:06:20,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:06:20,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:06:20,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:06:20,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 21:06:20,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:06:21,034 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:06:21,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160492848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:06:21,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:06:21,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-06-05 21:06:21,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546163999] [2021-06-05 21:06:21,034 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 21:06:21,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:06:21,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 21:06:21,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:06:21,035 INFO L87 Difference]: Start difference. First operand 9874 states and 26025 transitions. Second operand has 23 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 22 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:21,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:06:21,956 INFO L93 Difference]: Finished difference Result 10122 states and 26411 transitions. [2021-06-05 21:06:21,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:06:21,956 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 22 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 21:06:21,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:06:21,967 INFO L225 Difference]: With dead ends: 10122 [2021-06-05 21:06:21,967 INFO L226 Difference]: Without dead ends: 10030 [2021-06-05 21:06:21,967 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 267.1ms TimeCoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:06:21,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10030 states. [2021-06-05 21:06:22,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10030 to 9858. [2021-06-05 21:06:22,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9858 states, 9857 states have (on average 2.632038145480369) internal successors, (25944), 9857 states have internal predecessors, (25944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:22,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9858 states to 9858 states and 25944 transitions. [2021-06-05 21:06:22,084 INFO L78 Accepts]: Start accepts. Automaton has 9858 states and 25944 transitions. Word has length 53 [2021-06-05 21:06:22,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:06:22,085 INFO L482 AbstractCegarLoop]: Abstraction has 9858 states and 25944 transitions. [2021-06-05 21:06:22,085 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 22 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:22,085 INFO L276 IsEmpty]: Start isEmpty. Operand 9858 states and 25944 transitions. [2021-06-05 21:06:22,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 21:06:22,091 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:06:22,091 INFO L554 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:06:22,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable575 [2021-06-05 21:06:22,292 INFO L430 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:06:22,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:06:22,292 INFO L82 PathProgramCache]: Analyzing trace with hash -1609870245, now seen corresponding path program 75 times [2021-06-05 21:06:22,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:06:22,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322013889] [2021-06-05 21:06:22,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:06:22,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:06:22,367 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 79 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:06:22,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:06:22,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322013889] [2021-06-05 21:06:22,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322013889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:06:22,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842702700] [2021-06-05 21:06:22,367 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:06:22,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 21:06:22,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:06:22,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:06:22,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:06:22,480 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 80 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:06:22,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842702700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:06:22,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:06:22,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 11 [2021-06-05 21:06:22,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716520909] [2021-06-05 21:06:22,480 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:06:22,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:06:22,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:06:22,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:06:22,481 INFO L87 Difference]: Start difference. First operand 9858 states and 25944 transitions. Second operand has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:22,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:06:22,650 INFO L93 Difference]: Finished difference Result 13958 states and 35088 transitions. [2021-06-05 21:06:22,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:06:22,651 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 21:06:22,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:06:22,666 INFO L225 Difference]: With dead ends: 13958 [2021-06-05 21:06:22,666 INFO L226 Difference]: Without dead ends: 13958 [2021-06-05 21:06:22,666 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 75.5ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:06:22,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13958 states. [2021-06-05 21:06:22,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13958 to 10572. [2021-06-05 21:06:22,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10572 states, 10571 states have (on average 2.6615268186548104) internal successors, (28135), 10571 states have internal predecessors, (28135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:22,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10572 states to 10572 states and 28135 transitions. [2021-06-05 21:06:22,821 INFO L78 Accepts]: Start accepts. Automaton has 10572 states and 28135 transitions. Word has length 53 [2021-06-05 21:06:22,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:06:22,821 INFO L482 AbstractCegarLoop]: Abstraction has 10572 states and 28135 transitions. [2021-06-05 21:06:22,821 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:22,821 INFO L276 IsEmpty]: Start isEmpty. Operand 10572 states and 28135 transitions. [2021-06-05 21:06:22,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 21:06:22,829 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:06:22,829 INFO L554 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:06:23,029 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 284 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable576 [2021-06-05 21:06:23,029 INFO L430 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:06:23,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:06:23,029 INFO L82 PathProgramCache]: Analyzing trace with hash -2143735621, now seen corresponding path program 159 times [2021-06-05 21:06:23,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:06:23,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780202732] [2021-06-05 21:06:23,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:06:23,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:06:23,092 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 66 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:06:23,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:06:23,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780202732] [2021-06-05 21:06:23,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780202732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:06:23,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074643186] [2021-06-05 21:06:23,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:06:23,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 21:06:23,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:06:23,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:06:23,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:06:23,196 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 66 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:06:23,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074643186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:06:23,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:06:23,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 21:06:23,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332452819] [2021-06-05 21:06:23,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:06:23,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:06:23,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:06:23,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:06:23,197 INFO L87 Difference]: Start difference. First operand 10572 states and 28135 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:23,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:06:23,343 INFO L93 Difference]: Finished difference Result 11271 states and 29322 transitions. [2021-06-05 21:06:23,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:06:23,344 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 21:06:23,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:06:23,356 INFO L225 Difference]: With dead ends: 11271 [2021-06-05 21:06:23,356 INFO L226 Difference]: Without dead ends: 11265 [2021-06-05 21:06:23,356 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 57.5ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:06:23,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11265 states. [2021-06-05 21:06:23,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11265 to 10496. [2021-06-05 21:06:23,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10496 states, 10495 states have (on average 2.6580276322058123) internal successors, (27896), 10495 states have internal predecessors, (27896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:23,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10496 states to 10496 states and 27896 transitions. [2021-06-05 21:06:23,488 INFO L78 Accepts]: Start accepts. Automaton has 10496 states and 27896 transitions. Word has length 53 [2021-06-05 21:06:23,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:06:23,488 INFO L482 AbstractCegarLoop]: Abstraction has 10496 states and 27896 transitions. [2021-06-05 21:06:23,488 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:23,488 INFO L276 IsEmpty]: Start isEmpty. Operand 10496 states and 27896 transitions. [2021-06-05 21:06:23,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 21:06:23,495 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:06:23,495 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:06:23,695 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable577 [2021-06-05 21:06:23,695 INFO L430 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:06:23,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:06:23,696 INFO L82 PathProgramCache]: Analyzing trace with hash 1194965254, now seen corresponding path program 76 times [2021-06-05 21:06:23,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:06:23,696 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572317800] [2021-06-05 21:06:23,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:06:23,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:06:23,775 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 8 proven. 123 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:06:23,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:06:23,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572317800] [2021-06-05 21:06:23,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572317800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:06:23,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430924696] [2021-06-05 21:06:23,775 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:06:23,800 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:06:23,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:06:23,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 21:06:23,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:06:23,874 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 124 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:06:23,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430924696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:06:23,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:06:23,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 21:06:23,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163624920] [2021-06-05 21:06:23,875 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:06:23,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:06:23,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:06:23,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:06:23,875 INFO L87 Difference]: Start difference. First operand 10496 states and 27896 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:24,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:06:24,260 INFO L93 Difference]: Finished difference Result 11930 states and 30766 transitions. [2021-06-05 21:06:24,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:06:24,261 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 21:06:24,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:06:24,273 INFO L225 Difference]: With dead ends: 11930 [2021-06-05 21:06:24,273 INFO L226 Difference]: Without dead ends: 11885 [2021-06-05 21:06:24,273 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 121.0ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:06:24,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11885 states. [2021-06-05 21:06:24,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11885 to 10613. [2021-06-05 21:06:24,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10613 states, 10612 states have (on average 2.6563324538258577) internal successors, (28189), 10612 states have internal predecessors, (28189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:24,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10613 states to 10613 states and 28189 transitions. [2021-06-05 21:06:24,453 INFO L78 Accepts]: Start accepts. Automaton has 10613 states and 28189 transitions. Word has length 53 [2021-06-05 21:06:24,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:06:24,453 INFO L482 AbstractCegarLoop]: Abstraction has 10613 states and 28189 transitions. [2021-06-05 21:06:24,453 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:24,454 INFO L276 IsEmpty]: Start isEmpty. Operand 10613 states and 28189 transitions. [2021-06-05 21:06:24,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 21:06:24,460 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:06:24,461 INFO L554 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:06:24,661 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable580,286 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:06:24,661 INFO L430 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:06:24,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:06:24,661 INFO L82 PathProgramCache]: Analyzing trace with hash -358731603, now seen corresponding path program 160 times [2021-06-05 21:06:24,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:06:24,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556279857] [2021-06-05 21:06:24,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:06:24,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:06:24,714 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 62 proven. 69 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:06:24,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:06:24,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556279857] [2021-06-05 21:06:24,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556279857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:06:24,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68497333] [2021-06-05 21:06:24,714 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:06:24,739 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:06:24,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:06:24,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:06:24,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:06:24,810 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 62 proven. 69 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:06:24,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68497333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:06:24,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:06:24,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 21:06:24,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888321488] [2021-06-05 21:06:24,811 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:06:24,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:06:24,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:06:24,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:06:24,811 INFO L87 Difference]: Start difference. First operand 10613 states and 28189 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:24,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:06:24,957 INFO L93 Difference]: Finished difference Result 11953 states and 30528 transitions. [2021-06-05 21:06:24,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:06:24,958 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 21:06:24,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:06:24,969 INFO L225 Difference]: With dead ends: 11953 [2021-06-05 21:06:24,969 INFO L226 Difference]: Without dead ends: 11950 [2021-06-05 21:06:24,970 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 46.6ms TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:06:24,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11950 states. [2021-06-05 21:06:25,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11950 to 10587. [2021-06-05 21:06:25,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10587 states, 10586 states have (on average 2.65397695068959) internal successors, (28095), 10586 states have internal predecessors, (28095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:25,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10587 states to 10587 states and 28095 transitions. [2021-06-05 21:06:25,111 INFO L78 Accepts]: Start accepts. Automaton has 10587 states and 28095 transitions. Word has length 53 [2021-06-05 21:06:25,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:06:25,111 INFO L482 AbstractCegarLoop]: Abstraction has 10587 states and 28095 transitions. [2021-06-05 21:06:25,111 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:25,111 INFO L276 IsEmpty]: Start isEmpty. Operand 10587 states and 28095 transitions. [2021-06-05 21:06:25,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 21:06:25,119 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:06:25,119 INFO L554 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:06:25,319 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable581,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:06:25,319 INFO L430 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:06:25,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:06:25,320 INFO L82 PathProgramCache]: Analyzing trace with hash -151669037, now seen corresponding path program 161 times [2021-06-05 21:06:25,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:06:25,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973788506] [2021-06-05 21:06:25,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:06:25,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:06:25,379 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 59 proven. 72 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:06:25,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:06:25,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973788506] [2021-06-05 21:06:25,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973788506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:06:25,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143060873] [2021-06-05 21:06:25,380 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:06:25,407 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 21:06:25,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:06:25,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:06:25,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:06:25,511 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 63 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:06:25,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143060873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:06:25,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:06:25,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 16 [2021-06-05 21:06:25,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479324312] [2021-06-05 21:06:25,512 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:06:25,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:06:25,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:06:25,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:06:25,512 INFO L87 Difference]: Start difference. First operand 10587 states and 28095 transitions. Second operand has 17 states, 17 states have (on average 4.529411764705882) internal successors, (77), 16 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:25,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:06:25,789 INFO L93 Difference]: Finished difference Result 12225 states and 31030 transitions. [2021-06-05 21:06:25,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:06:25,789 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.529411764705882) internal successors, (77), 16 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 21:06:25,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:06:25,803 INFO L225 Difference]: With dead ends: 12225 [2021-06-05 21:06:25,803 INFO L226 Difference]: Without dead ends: 12207 [2021-06-05 21:06:25,804 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 104.4ms TimeCoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:06:25,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12207 states. [2021-06-05 21:06:25,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12207 to 10208. [2021-06-05 21:06:25,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10208 states, 10207 states have (on average 2.6436759086901147) internal successors, (26984), 10207 states have internal predecessors, (26984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:25,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10208 states to 10208 states and 26984 transitions. [2021-06-05 21:06:25,940 INFO L78 Accepts]: Start accepts. Automaton has 10208 states and 26984 transitions. Word has length 53 [2021-06-05 21:06:25,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:06:25,941 INFO L482 AbstractCegarLoop]: Abstraction has 10208 states and 26984 transitions. [2021-06-05 21:06:25,941 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.529411764705882) internal successors, (77), 16 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:25,941 INFO L276 IsEmpty]: Start isEmpty. Operand 10208 states and 26984 transitions. [2021-06-05 21:06:25,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 21:06:25,948 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:06:25,948 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:06:26,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable583,288 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:06:26,148 INFO L430 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:06:26,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:06:26,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1599669050, now seen corresponding path program 162 times [2021-06-05 21:06:26,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:06:26,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824070691] [2021-06-05 21:06:26,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:06:26,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:06:26,222 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 18 proven. 113 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:06:26,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:06:26,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824070691] [2021-06-05 21:06:26,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824070691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:06:26,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555127979] [2021-06-05 21:06:26,222 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:06:26,251 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 21:06:26,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:06:26,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:06:26,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:06:26,448 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 21:06:26,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 16 [2021-06-05 21:06:26,450 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:06:26,455 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:06:26,455 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-06-05 21:06:26,456 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:06:26,456 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:27, output treesize:19 [2021-06-05 21:06:26,495 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 45 proven. 87 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:06:26,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555127979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:06:26,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:06:26,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 20 [2021-06-05 21:06:26,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900468309] [2021-06-05 21:06:26,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:06:26,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:06:26,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:06:26,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:06:26,496 INFO L87 Difference]: Start difference. First operand 10208 states and 26984 transitions. Second operand has 21 states, 21 states have (on average 4.666666666666667) internal successors, (98), 20 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:28,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:06:28,901 INFO L93 Difference]: Finished difference Result 13433 states and 33117 transitions. [2021-06-05 21:06:28,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-06-05 21:06:28,901 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.666666666666667) internal successors, (98), 20 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 21:06:28,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:06:28,917 INFO L225 Difference]: With dead ends: 13433 [2021-06-05 21:06:28,917 INFO L226 Difference]: Without dead ends: 13411 [2021-06-05 21:06:28,918 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2987 ImplicationChecksByTransitivity, 1449.6ms TimeCoverageRelationStatistics Valid=1527, Invalid=7403, Unknown=0, NotChecked=0, Total=8930 [2021-06-05 21:06:28,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13411 states. [2021-06-05 21:06:29,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13411 to 10206. [2021-06-05 21:06:29,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10206 states, 10205 states have (on average 2.6425281724644782) internal successors, (26967), 10205 states have internal predecessors, (26967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:29,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10206 states to 10206 states and 26967 transitions. [2021-06-05 21:06:29,071 INFO L78 Accepts]: Start accepts. Automaton has 10206 states and 26967 transitions. Word has length 53 [2021-06-05 21:06:29,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:06:29,072 INFO L482 AbstractCegarLoop]: Abstraction has 10206 states and 26967 transitions. [2021-06-05 21:06:29,072 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 4.666666666666667) internal successors, (98), 20 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:29,072 INFO L276 IsEmpty]: Start isEmpty. Operand 10206 states and 26967 transitions. [2021-06-05 21:06:29,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 21:06:29,079 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:06:29,079 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:06:29,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable586,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:06:29,280 INFO L430 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:06:29,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:06:29,280 INFO L82 PathProgramCache]: Analyzing trace with hash 2081762066, now seen corresponding path program 163 times [2021-06-05 21:06:29,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:06:29,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758939324] [2021-06-05 21:06:29,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:06:29,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:06:29,363 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 114 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:06:29,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:06:29,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758939324] [2021-06-05 21:06:29,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758939324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:06:29,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005052399] [2021-06-05 21:06:29,363 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:06:29,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:06:29,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 21:06:29,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:06:29,463 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 115 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:06:29,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005052399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:06:29,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:06:29,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 21:06:29,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450242597] [2021-06-05 21:06:29,464 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:06:29,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:06:29,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:06:29,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:06:29,464 INFO L87 Difference]: Start difference. First operand 10206 states and 26967 transitions. Second operand has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:29,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:06:29,875 INFO L93 Difference]: Finished difference Result 11323 states and 29185 transitions. [2021-06-05 21:06:29,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:06:29,875 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 21:06:29,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:06:29,887 INFO L225 Difference]: With dead ends: 11323 [2021-06-05 21:06:29,888 INFO L226 Difference]: Without dead ends: 11323 [2021-06-05 21:06:29,888 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 122.4ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:06:29,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11323 states. [2021-06-05 21:06:30,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11323 to 10216. [2021-06-05 21:06:30,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10216 states, 10215 states have (on average 2.6420949583945177) internal successors, (26989), 10215 states have internal predecessors, (26989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:30,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10216 states to 10216 states and 26989 transitions. [2021-06-05 21:06:30,047 INFO L78 Accepts]: Start accepts. Automaton has 10216 states and 26989 transitions. Word has length 53 [2021-06-05 21:06:30,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:06:30,048 INFO L482 AbstractCegarLoop]: Abstraction has 10216 states and 26989 transitions. [2021-06-05 21:06:30,048 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:30,048 INFO L276 IsEmpty]: Start isEmpty. Operand 10216 states and 26989 transitions. [2021-06-05 21:06:30,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 21:06:30,056 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:06:30,056 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:06:30,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable587 [2021-06-05 21:06:30,256 INFO L430 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:06:30,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:06:30,257 INFO L82 PathProgramCache]: Analyzing trace with hash -71287896, now seen corresponding path program 164 times [2021-06-05 21:06:30,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:06:30,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152300775] [2021-06-05 21:06:30,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:06:30,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:06:30,335 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 119 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:06:30,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:06:30,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152300775] [2021-06-05 21:06:30,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152300775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:06:30,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842357334] [2021-06-05 21:06:30,336 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:06:30,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:06:30,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:06:30,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 21:06:30,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:06:30,436 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 119 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:06:30,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842357334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:06:30,436 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:06:30,436 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 21:06:30,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181787655] [2021-06-05 21:06:30,437 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:06:30,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:06:30,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:06:30,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:06:30,437 INFO L87 Difference]: Start difference. First operand 10216 states and 26989 transitions. Second operand has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:30,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:06:30,929 INFO L93 Difference]: Finished difference Result 11942 states and 30505 transitions. [2021-06-05 21:06:30,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:06:30,930 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 21:06:30,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:06:30,942 INFO L225 Difference]: With dead ends: 11942 [2021-06-05 21:06:30,942 INFO L226 Difference]: Without dead ends: 11942 [2021-06-05 21:06:30,942 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 147.5ms TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:06:30,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11942 states. [2021-06-05 21:06:31,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11942 to 10248. [2021-06-05 21:06:31,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10248 states, 10247 states have (on average 2.641163267297746) internal successors, (27064), 10247 states have internal predecessors, (27064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:31,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10248 states to 10248 states and 27064 transitions. [2021-06-05 21:06:31,075 INFO L78 Accepts]: Start accepts. Automaton has 10248 states and 27064 transitions. Word has length 53 [2021-06-05 21:06:31,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:06:31,075 INFO L482 AbstractCegarLoop]: Abstraction has 10248 states and 27064 transitions. [2021-06-05 21:06:31,075 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:31,076 INFO L276 IsEmpty]: Start isEmpty. Operand 10248 states and 27064 transitions. [2021-06-05 21:06:31,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 21:06:31,082 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:06:31,082 INFO L554 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:06:31,283 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable588,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:06:31,283 INFO L430 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:06:31,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:06:31,283 INFO L82 PathProgramCache]: Analyzing trace with hash -309349413, now seen corresponding path program 77 times [2021-06-05 21:06:31,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:06:31,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158618878] [2021-06-05 21:06:31,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:06:31,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:06:31,351 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 84 proven. 51 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:06:31,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:06:31,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158618878] [2021-06-05 21:06:31,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158618878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:06:31,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411545040] [2021-06-05 21:06:31,352 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:06:31,383 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 21:06:31,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:06:31,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:06:31,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:06:31,474 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 85 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:06:31,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411545040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:06:31,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:06:31,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 13 [2021-06-05 21:06:31,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456836216] [2021-06-05 21:06:31,474 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:06:31,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:06:31,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:06:31,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:06:31,475 INFO L87 Difference]: Start difference. First operand 10248 states and 27064 transitions. Second operand has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:31,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:06:31,670 INFO L93 Difference]: Finished difference Result 13713 states and 34190 transitions. [2021-06-05 21:06:31,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:06:31,671 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 21:06:31,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:06:31,686 INFO L225 Difference]: With dead ends: 13713 [2021-06-05 21:06:31,686 INFO L226 Difference]: Without dead ends: 13705 [2021-06-05 21:06:31,686 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 87.4ms TimeCoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:06:31,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13705 states. [2021-06-05 21:06:31,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13705 to 10512. [2021-06-05 21:06:31,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10512 states, 10511 states have (on average 2.6529350204547617) internal successors, (27885), 10511 states have internal predecessors, (27885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:31,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10512 states to 10512 states and 27885 transitions. [2021-06-05 21:06:31,835 INFO L78 Accepts]: Start accepts. Automaton has 10512 states and 27885 transitions. Word has length 53 [2021-06-05 21:06:31,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:06:31,835 INFO L482 AbstractCegarLoop]: Abstraction has 10512 states and 27885 transitions. [2021-06-05 21:06:31,835 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:31,835 INFO L276 IsEmpty]: Start isEmpty. Operand 10512 states and 27885 transitions. [2021-06-05 21:06:31,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 21:06:31,843 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:06:31,843 INFO L554 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:06:32,043 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable589 [2021-06-05 21:06:32,043 INFO L430 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:06:32,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:06:32,043 INFO L82 PathProgramCache]: Analyzing trace with hash -931229823, now seen corresponding path program 78 times [2021-06-05 21:06:32,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:06:32,044 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145561777] [2021-06-05 21:06:32,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:06:32,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:06:32,101 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 84 proven. 50 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:06:32,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:06:32,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145561777] [2021-06-05 21:06:32,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145561777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:06:32,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253819652] [2021-06-05 21:06:32,101 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:06:32,130 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 21:06:32,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:06:32,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:06:32,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:06:32,224 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 85 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:06:32,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253819652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:06:32,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:06:32,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 13 [2021-06-05 21:06:32,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662489367] [2021-06-05 21:06:32,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:06:32,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:06:32,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:06:32,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:06:32,225 INFO L87 Difference]: Start difference. First operand 10512 states and 27885 transitions. Second operand has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:32,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:06:32,451 INFO L93 Difference]: Finished difference Result 15140 states and 37466 transitions. [2021-06-05 21:06:32,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:06:32,451 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 21:06:32,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:06:32,468 INFO L225 Difference]: With dead ends: 15140 [2021-06-05 21:06:32,468 INFO L226 Difference]: Without dead ends: 15140 [2021-06-05 21:06:32,468 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 87.9ms TimeCoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:06:32,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15140 states. [2021-06-05 21:06:32,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15140 to 10520. [2021-06-05 21:06:32,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10520 states, 10519 states have (on average 2.6527236429318375) internal successors, (27904), 10519 states have internal predecessors, (27904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:32,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10520 states to 10520 states and 27904 transitions. [2021-06-05 21:06:32,653 INFO L78 Accepts]: Start accepts. Automaton has 10520 states and 27904 transitions. Word has length 53 [2021-06-05 21:06:32,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:06:32,653 INFO L482 AbstractCegarLoop]: Abstraction has 10520 states and 27904 transitions. [2021-06-05 21:06:32,653 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:32,653 INFO L276 IsEmpty]: Start isEmpty. Operand 10520 states and 27904 transitions. [2021-06-05 21:06:32,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 21:06:32,660 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:06:32,661 INFO L554 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:06:32,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable591,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:06:32,861 INFO L430 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:06:32,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:06:32,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1726165017, now seen corresponding path program 79 times [2021-06-05 21:06:32,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:06:32,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148661569] [2021-06-05 21:06:32,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:06:32,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:06:32,936 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 80 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:06:32,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:06:32,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148661569] [2021-06-05 21:06:32,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148661569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:06:32,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873803445] [2021-06-05 21:06:32,936 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:06:32,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:06:32,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:06:32,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:06:33,045 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 81 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:06:33,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873803445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:06:33,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:06:33,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 12 [2021-06-05 21:06:33,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392974473] [2021-06-05 21:06:33,045 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:06:33,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:06:33,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:06:33,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:06:33,045 INFO L87 Difference]: Start difference. First operand 10520 states and 27904 transitions. Second operand has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 12 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:33,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:06:33,248 INFO L93 Difference]: Finished difference Result 13839 states and 34594 transitions. [2021-06-05 21:06:33,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:06:33,249 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 12 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 21:06:33,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:06:33,264 INFO L225 Difference]: With dead ends: 13839 [2021-06-05 21:06:33,264 INFO L226 Difference]: Without dead ends: 13839 [2021-06-05 21:06:33,265 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 91.8ms TimeCoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:06:33,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13839 states. [2021-06-05 21:06:33,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13839 to 10344. [2021-06-05 21:06:33,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10344 states, 10343 states have (on average 2.6458474330465047) internal successors, (27366), 10343 states have internal predecessors, (27366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:33,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10344 states to 10344 states and 27366 transitions. [2021-06-05 21:06:33,413 INFO L78 Accepts]: Start accepts. Automaton has 10344 states and 27366 transitions. Word has length 53 [2021-06-05 21:06:33,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:06:33,413 INFO L482 AbstractCegarLoop]: Abstraction has 10344 states and 27366 transitions. [2021-06-05 21:06:33,413 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 12 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:33,413 INFO L276 IsEmpty]: Start isEmpty. Operand 10344 states and 27366 transitions. [2021-06-05 21:06:33,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 21:06:33,420 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:06:33,420 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:06:33,621 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable592,294 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:06:33,621 INFO L430 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:06:33,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:06:33,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1133718440, now seen corresponding path program 80 times [2021-06-05 21:06:33,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:06:33,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348909752] [2021-06-05 21:06:33,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:06:33,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:06:33,707 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 22 proven. 111 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:06:33,707 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:06:33,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348909752] [2021-06-05 21:06:33,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348909752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:06:33,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989733261] [2021-06-05 21:06:33,707 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:06:33,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:06:33,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:06:33,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 21:06:33,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:06:33,831 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 20 proven. 113 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:06:33,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989733261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:06:33,831 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:06:33,831 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-05 21:06:33,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685012424] [2021-06-05 21:06:33,832 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:06:33,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:06:33,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:06:33,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:06:33,832 INFO L87 Difference]: Start difference. First operand 10344 states and 27366 transitions. Second operand has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 12 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:34,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:06:34,450 INFO L93 Difference]: Finished difference Result 10977 states and 28511 transitions. [2021-06-05 21:06:34,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:06:34,450 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 12 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 21:06:34,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:06:34,463 INFO L225 Difference]: With dead ends: 10977 [2021-06-05 21:06:34,463 INFO L226 Difference]: Without dead ends: 10881 [2021-06-05 21:06:34,463 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 141.4ms TimeCoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:06:34,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10881 states. [2021-06-05 21:06:34,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10881 to 10343. [2021-06-05 21:06:34,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10343 states, 10342 states have (on average 2.6447495648810673) internal successors, (27352), 10342 states have internal predecessors, (27352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:34,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10343 states to 10343 states and 27352 transitions. [2021-06-05 21:06:34,590 INFO L78 Accepts]: Start accepts. Automaton has 10343 states and 27352 transitions. Word has length 53 [2021-06-05 21:06:34,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:06:34,590 INFO L482 AbstractCegarLoop]: Abstraction has 10343 states and 27352 transitions. [2021-06-05 21:06:34,590 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 12 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:34,591 INFO L276 IsEmpty]: Start isEmpty. Operand 10343 states and 27352 transitions. [2021-06-05 21:06:34,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 21:06:34,598 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:06:34,598 INFO L554 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:06:34,798 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable593,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:06:34,799 INFO L430 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:06:34,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:06:34,799 INFO L82 PathProgramCache]: Analyzing trace with hash 1461271213, now seen corresponding path program 165 times [2021-06-05 21:06:34,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:06:34,799 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4751642] [2021-06-05 21:06:34,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:06:34,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:06:34,865 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 61 proven. 74 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:06:34,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:06:34,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4751642] [2021-06-05 21:06:34,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4751642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:06:34,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852246093] [2021-06-05 21:06:34,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:06:34,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 21:06:34,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:06:34,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:06:34,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:06:34,967 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 61 proven. 74 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:06:34,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852246093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:06:34,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:06:34,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 21:06:34,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594349184] [2021-06-05 21:06:34,967 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:06:34,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:06:34,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:06:34,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:06:34,968 INFO L87 Difference]: Start difference. First operand 10343 states and 27352 transitions. Second operand has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:35,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:06:35,147 INFO L93 Difference]: Finished difference Result 11313 states and 29024 transitions. [2021-06-05 21:06:35,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:06:35,147 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 21:06:35,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:06:35,197 INFO L225 Difference]: With dead ends: 11313 [2021-06-05 21:06:35,197 INFO L226 Difference]: Without dead ends: 11295 [2021-06-05 21:06:35,197 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 69.5ms TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:06:35,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11295 states. [2021-06-05 21:06:35,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11295 to 10343. [2021-06-05 21:06:35,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10343 states, 10342 states have (on average 2.643782633919938) internal successors, (27342), 10342 states have internal predecessors, (27342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:35,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10343 states to 10343 states and 27342 transitions. [2021-06-05 21:06:35,315 INFO L78 Accepts]: Start accepts. Automaton has 10343 states and 27342 transitions. Word has length 53 [2021-06-05 21:06:35,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:06:35,315 INFO L482 AbstractCegarLoop]: Abstraction has 10343 states and 27342 transitions. [2021-06-05 21:06:35,315 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:35,315 INFO L276 IsEmpty]: Start isEmpty. Operand 10343 states and 27342 transitions. [2021-06-05 21:06:35,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 21:06:35,323 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:06:35,323 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:06:35,523 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable594,296 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:06:35,523 INFO L430 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:06:35,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:06:35,524 INFO L82 PathProgramCache]: Analyzing trace with hash -1403224534, now seen corresponding path program 81 times [2021-06-05 21:06:35,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:06:35,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206715615] [2021-06-05 21:06:35,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:06:35,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:06:35,607 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 8 proven. 123 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:06:35,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:06:35,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206715615] [2021-06-05 21:06:35,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206715615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:06:35,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968999322] [2021-06-05 21:06:35,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:06:35,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-06-05 21:06:35,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:06:35,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 21:06:35,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:06:35,713 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 124 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:06:35,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968999322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:06:35,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:06:35,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 21:06:35,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934107808] [2021-06-05 21:06:35,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:06:35,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:06:35,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:06:35,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:06:35,714 INFO L87 Difference]: Start difference. First operand 10343 states and 27342 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:36,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:06:36,139 INFO L93 Difference]: Finished difference Result 11804 states and 30259 transitions. [2021-06-05 21:06:36,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:06:36,140 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 21:06:36,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:06:36,153 INFO L225 Difference]: With dead ends: 11804 [2021-06-05 21:06:36,153 INFO L226 Difference]: Without dead ends: 11766 [2021-06-05 21:06:36,154 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 124.8ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:06:36,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11766 states. [2021-06-05 21:06:36,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11766 to 10492. [2021-06-05 21:06:36,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10492 states, 10491 states have (on average 2.6421694786007053) internal successors, (27719), 10491 states have internal predecessors, (27719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:36,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10492 states to 10492 states and 27719 transitions. [2021-06-05 21:06:36,302 INFO L78 Accepts]: Start accepts. Automaton has 10492 states and 27719 transitions. Word has length 53 [2021-06-05 21:06:36,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:06:36,303 INFO L482 AbstractCegarLoop]: Abstraction has 10492 states and 27719 transitions. [2021-06-05 21:06:36,303 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:36,303 INFO L276 IsEmpty]: Start isEmpty. Operand 10492 states and 27719 transitions. [2021-06-05 21:06:36,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 21:06:36,310 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:06:36,310 INFO L554 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:06:36,510 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable598 [2021-06-05 21:06:36,511 INFO L430 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:06:36,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:06:36,511 INFO L82 PathProgramCache]: Analyzing trace with hash 1338045905, now seen corresponding path program 166 times [2021-06-05 21:06:36,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:06:36,511 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296721914] [2021-06-05 21:06:36,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:06:36,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:06:36,570 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 52 proven. 79 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:06:36,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:06:36,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296721914] [2021-06-05 21:06:36,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296721914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:06:36,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120654929] [2021-06-05 21:06:36,571 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:06:36,616 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:06:36,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:06:36,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:06:36,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:06:36,688 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 52 proven. 79 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:06:36,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120654929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:06:36,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:06:36,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 21:06:36,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381497168] [2021-06-05 21:06:36,688 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:06:36,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:06:36,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:06:36,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:06:36,689 INFO L87 Difference]: Start difference. First operand 10492 states and 27719 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:36,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:06:36,851 INFO L93 Difference]: Finished difference Result 12007 states and 30378 transitions. [2021-06-05 21:06:36,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:06:36,852 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 21:06:36,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:06:36,865 INFO L225 Difference]: With dead ends: 12007 [2021-06-05 21:06:36,865 INFO L226 Difference]: Without dead ends: 12004 [2021-06-05 21:06:36,865 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 51.8ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:06:36,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12004 states. [2021-06-05 21:06:36,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12004 to 10472. [2021-06-05 21:06:36,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10472 states, 10471 states have (on average 2.639957979180594) internal successors, (27643), 10471 states have internal predecessors, (27643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:37,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10472 states to 10472 states and 27643 transitions. [2021-06-05 21:06:37,013 INFO L78 Accepts]: Start accepts. Automaton has 10472 states and 27643 transitions. Word has length 53 [2021-06-05 21:06:37,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:06:37,013 INFO L482 AbstractCegarLoop]: Abstraction has 10472 states and 27643 transitions. [2021-06-05 21:06:37,013 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:37,013 INFO L276 IsEmpty]: Start isEmpty. Operand 10472 states and 27643 transitions. [2021-06-05 21:06:37,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 21:06:37,021 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:06:37,021 INFO L554 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:06:37,221 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable599 [2021-06-05 21:06:37,221 INFO L430 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:06:37,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:06:37,222 INFO L82 PathProgramCache]: Analyzing trace with hash 1545108471, now seen corresponding path program 167 times [2021-06-05 21:06:37,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:06:37,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498879300] [2021-06-05 21:06:37,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:06:37,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:06:37,289 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 48 proven. 83 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:06:37,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:06:37,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498879300] [2021-06-05 21:06:37,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498879300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:06:37,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408163645] [2021-06-05 21:06:37,290 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:06:37,335 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 21:06:37,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:06:37,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:06:37,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:06:37,452 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 52 proven. 83 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:06:37,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408163645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:06:37,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:06:37,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2021-06-05 21:06:37,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045154672] [2021-06-05 21:06:37,453 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:06:37,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:06:37,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:06:37,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:06:37,453 INFO L87 Difference]: Start difference. First operand 10472 states and 27643 transitions. Second operand has 16 states, 16 states have (on average 4.625) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:37,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:06:37,816 INFO L93 Difference]: Finished difference Result 12244 states and 30811 transitions. [2021-06-05 21:06:37,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:06:37,817 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.625) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 21:06:37,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:06:37,828 INFO L225 Difference]: With dead ends: 12244 [2021-06-05 21:06:37,828 INFO L226 Difference]: Without dead ends: 12226 [2021-06-05 21:06:37,828 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 109.0ms TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:06:37,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12226 states. [2021-06-05 21:06:37,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12226 to 10472. [2021-06-05 21:06:37,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10472 states, 10471 states have (on average 2.6376659344857223) internal successors, (27619), 10471 states have internal predecessors, (27619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:37,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10472 states to 10472 states and 27619 transitions. [2021-06-05 21:06:37,966 INFO L78 Accepts]: Start accepts. Automaton has 10472 states and 27619 transitions. Word has length 53 [2021-06-05 21:06:37,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:06:37,967 INFO L482 AbstractCegarLoop]: Abstraction has 10472 states and 27619 transitions. [2021-06-05 21:06:37,967 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.625) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:37,967 INFO L276 IsEmpty]: Start isEmpty. Operand 10472 states and 27619 transitions. [2021-06-05 21:06:37,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 21:06:37,974 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:06:37,975 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:06:38,175 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable601,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:06:38,175 INFO L430 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:06:38,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:06:38,175 INFO L82 PathProgramCache]: Analyzing trace with hash 97108458, now seen corresponding path program 168 times [2021-06-05 21:06:38,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:06:38,175 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170514056] [2021-06-05 21:06:38,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:06:38,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:06:38,256 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 18 proven. 113 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:06:38,256 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:06:38,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170514056] [2021-06-05 21:06:38,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170514056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:06:38,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680765457] [2021-06-05 21:06:38,256 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:06:38,285 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-05 21:06:38,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:06:38,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 21:06:38,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:06:38,375 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 118 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:06:38,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680765457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:06:38,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:06:38,376 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 21:06:38,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846239091] [2021-06-05 21:06:38,376 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:06:38,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:06:38,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:06:38,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:06:38,376 INFO L87 Difference]: Start difference. First operand 10472 states and 27619 transitions. Second operand has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:38,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:06:38,917 INFO L93 Difference]: Finished difference Result 11210 states and 28930 transitions. [2021-06-05 21:06:38,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:06:38,917 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 21:06:38,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:06:38,929 INFO L225 Difference]: With dead ends: 11210 [2021-06-05 21:06:38,929 INFO L226 Difference]: Without dead ends: 11154 [2021-06-05 21:06:38,929 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 125.2ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:06:38,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11154 states. [2021-06-05 21:06:39,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11154 to 10444. [2021-06-05 21:06:39,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10444 states, 10443 states have (on average 2.63497079383319) internal successors, (27517), 10443 states have internal predecessors, (27517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:39,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10444 states to 10444 states and 27517 transitions. [2021-06-05 21:06:39,077 INFO L78 Accepts]: Start accepts. Automaton has 10444 states and 27517 transitions. Word has length 53 [2021-06-05 21:06:39,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:06:39,078 INFO L482 AbstractCegarLoop]: Abstraction has 10444 states and 27517 transitions. [2021-06-05 21:06:39,078 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) [2021-06-05 21:06:39,078 INFO L276 IsEmpty]: Start isEmpty. Operand 10444 states and 27517 transitions. [2021-06-05 21:06:39,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 21:06:39,086 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:06:39,086 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:06:39,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable604 [2021-06-05 21:06:39,286 INFO L430 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:06:39,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:06:39,287 INFO L82 PathProgramCache]: Analyzing trace with hash -516427722, now seen corresponding path program 169 times [2021-06-05 21:06:39,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:06:39,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191266241] [2021-06-05 21:06:39,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:06:39,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:06:39,366 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 114 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:06:39,366 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:06:39,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191266241] [2021-06-05 21:06:39,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191266241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:06:39,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587541866] [2021-06-05 21:06:39,366 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:06:39,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:06:39,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 21:06:39,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:06:39,483 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 115 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:06:39,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587541866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:06:39,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:06:39,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 21:06:39,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49781377] [2021-06-05 21:06:39,484 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:06:39,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:06:39,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:06:39,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:06:39,485 INFO L87 Difference]: Start difference. First operand 10444 states and 27517 transitions. Second operand has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:39,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:06:39,938 INFO L93 Difference]: Finished difference Result 11584 states and 29771 transitions. [2021-06-05 21:06:39,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:06:39,938 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 21:06:39,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:06:39,951 INFO L225 Difference]: With dead ends: 11584 [2021-06-05 21:06:39,952 INFO L226 Difference]: Without dead ends: 11572 [2021-06-05 21:06:39,952 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 123.0ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:06:39,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11572 states. [2021-06-05 21:06:40,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11572 to 10490. [2021-06-05 21:06:40,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10490 states, 10489 states have (on average 2.6332348174277813) internal successors, (27620), 10489 states have internal predecessors, (27620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:40,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10490 states to 10490 states and 27620 transitions. [2021-06-05 21:06:40,100 INFO L78 Accepts]: Start accepts. Automaton has 10490 states and 27620 transitions. Word has length 53 [2021-06-05 21:06:40,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:06:40,100 INFO L482 AbstractCegarLoop]: Abstraction has 10490 states and 27620 transitions. [2021-06-05 21:06:40,100 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:40,101 INFO L276 IsEmpty]: Start isEmpty. Operand 10490 states and 27620 transitions. [2021-06-05 21:06:40,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 21:06:40,108 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:06:40,108 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:06:40,309 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable605,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:06:40,309 INFO L430 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:06:40,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:06:40,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1625489612, now seen corresponding path program 170 times [2021-06-05 21:06:40,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:06:40,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463860746] [2021-06-05 21:06:40,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:06:40,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:06:40,389 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 116 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:06:40,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:06:40,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463860746] [2021-06-05 21:06:40,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463860746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:06:40,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490173942] [2021-06-05 21:06:40,389 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:06:40,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:06:40,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:06:40,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 21:06:40,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:06:40,541 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 117 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:06:40,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490173942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:06:40,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:06:40,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 21:06:40,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403834654] [2021-06-05 21:06:40,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:06:40,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:06:40,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:06:40,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:06:40,542 INFO L87 Difference]: Start difference. First operand 10490 states and 27620 transitions. Second operand has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:41,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:06:41,059 INFO L93 Difference]: Finished difference Result 12749 states and 32307 transitions. [2021-06-05 21:06:41,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:06:41,059 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 21:06:41,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:06:41,073 INFO L225 Difference]: With dead ends: 12749 [2021-06-05 21:06:41,073 INFO L226 Difference]: Without dead ends: 12707 [2021-06-05 21:06:41,073 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 167.1ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:06:41,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12707 states. [2021-06-05 21:06:41,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12707 to 10549. [2021-06-05 21:06:41,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10549 states, 10548 states have (on average 2.6331058020477816) internal successors, (27774), 10548 states have internal predecessors, (27774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:41,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10549 states to 10549 states and 27774 transitions. [2021-06-05 21:06:41,211 INFO L78 Accepts]: Start accepts. Automaton has 10549 states and 27774 transitions. Word has length 53 [2021-06-05 21:06:41,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:06:41,211 INFO L482 AbstractCegarLoop]: Abstraction has 10549 states and 27774 transitions. [2021-06-05 21:06:41,212 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:41,212 INFO L276 IsEmpty]: Start isEmpty. Operand 10549 states and 27774 transitions. [2021-06-05 21:06:41,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 21:06:41,219 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:06:41,219 INFO L554 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:06:41,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable606,302 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:06:41,420 INFO L430 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:06:41,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:06:41,420 INFO L82 PathProgramCache]: Analyzing trace with hash -1136918575, now seen corresponding path program 171 times [2021-06-05 21:06:41,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:06:41,420 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610878958] [2021-06-05 21:06:41,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:06:41,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:06:41,485 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 46 proven. 88 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:06:41,485 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:06:41,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610878958] [2021-06-05 21:06:41,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610878958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:06:41,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521255247] [2021-06-05 21:06:41,486 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:06:41,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 21:06:41,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:06:41,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:06:41,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:06:41,586 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 46 proven. 88 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:06:41,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521255247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:06:41,586 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:06:41,586 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 21:06:41,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472921106] [2021-06-05 21:06:41,586 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:06:41,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:06:41,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:06:41,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:06:41,587 INFO L87 Difference]: Start difference. First operand 10549 states and 27774 transitions. Second operand has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:41,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:06:41,767 INFO L93 Difference]: Finished difference Result 12080 states and 30433 transitions. [2021-06-05 21:06:41,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:06:41,767 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 21:06:41,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:06:41,779 INFO L225 Difference]: With dead ends: 12080 [2021-06-05 21:06:41,779 INFO L226 Difference]: Without dead ends: 12056 [2021-06-05 21:06:41,779 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 76.5ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:06:41,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12056 states. [2021-06-05 21:06:41,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12056 to 10182. [2021-06-05 21:06:41,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10182 states, 10181 states have (on average 2.6232197230134564) internal successors, (26707), 10181 states have internal predecessors, (26707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:41,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10182 states to 10182 states and 26707 transitions. [2021-06-05 21:06:41,912 INFO L78 Accepts]: Start accepts. Automaton has 10182 states and 26707 transitions. Word has length 53 [2021-06-05 21:06:41,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:06:41,912 INFO L482 AbstractCegarLoop]: Abstraction has 10182 states and 26707 transitions. [2021-06-05 21:06:41,912 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:41,912 INFO L276 IsEmpty]: Start isEmpty. Operand 10182 states and 26707 transitions. [2021-06-05 21:06:41,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 21:06:41,920 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:06:41,920 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:06:42,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable607,303 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:06:42,121 INFO L430 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:06:42,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:06:42,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1780326146, now seen corresponding path program 172 times [2021-06-05 21:06:42,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:06:42,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825347461] [2021-06-05 21:06:42,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:06:42,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:06:42,229 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 119 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:06:42,229 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:06:42,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825347461] [2021-06-05 21:06:42,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825347461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:06:42,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178292737] [2021-06-05 21:06:42,229 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:06:42,254 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:06:42,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:06:42,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 21:06:42,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:06:42,328 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 119 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:06:42,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178292737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:06:42,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:06:42,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:06:42,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617868724] [2021-06-05 21:06:42,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:06:42,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:06:42,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:06:42,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:06:42,329 INFO L87 Difference]: Start difference. First operand 10182 states and 26707 transitions. Second operand has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:42,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:06:42,867 INFO L93 Difference]: Finished difference Result 12810 states and 32153 transitions. [2021-06-05 21:06:42,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:06:42,868 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 21:06:42,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:06:42,884 INFO L225 Difference]: With dead ends: 12810 [2021-06-05 21:06:42,884 INFO L226 Difference]: Without dead ends: 12756 [2021-06-05 21:06:42,884 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 191.5ms TimeCoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:06:42,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12756 states. [2021-06-05 21:06:43,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12756 to 10143. [2021-06-05 21:06:43,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10143 states, 10142 states have (on average 2.620291855649773) internal successors, (26575), 10142 states have internal predecessors, (26575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:43,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10143 states to 10143 states and 26575 transitions. [2021-06-05 21:06:43,054 INFO L78 Accepts]: Start accepts. Automaton has 10143 states and 26575 transitions. Word has length 53 [2021-06-05 21:06:43,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:06:43,054 INFO L482 AbstractCegarLoop]: Abstraction has 10143 states and 26575 transitions. [2021-06-05 21:06:43,054 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:43,054 INFO L276 IsEmpty]: Start isEmpty. Operand 10143 states and 26575 transitions. [2021-06-05 21:06:43,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 21:06:43,062 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:06:43,062 INFO L554 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:06:43,262 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 304 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable611 [2021-06-05 21:06:43,262 INFO L430 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:06:43,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:06:43,263 INFO L82 PathProgramCache]: Analyzing trace with hash 1542264629, now seen corresponding path program 82 times [2021-06-05 21:06:43,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:06:43,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49056545] [2021-06-05 21:06:43,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:06:43,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:06:43,318 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 97 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:06:43,318 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:06:43,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49056545] [2021-06-05 21:06:43,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49056545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:06:43,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48946249] [2021-06-05 21:06:43,318 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:06:43,343 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:06:43,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:06:43,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:06:43,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:06:43,419 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 98 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:06:43,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48946249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:06:43,420 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:06:43,420 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 11 [2021-06-05 21:06:43,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205005287] [2021-06-05 21:06:43,420 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:06:43,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:06:43,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:06:43,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:06:43,420 INFO L87 Difference]: Start difference. First operand 10143 states and 26575 transitions. Second operand has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:43,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:06:43,613 INFO L93 Difference]: Finished difference Result 13236 states and 32994 transitions. [2021-06-05 21:06:43,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:06:43,614 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 21:06:43,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:06:43,627 INFO L225 Difference]: With dead ends: 13236 [2021-06-05 21:06:43,627 INFO L226 Difference]: Without dead ends: 13222 [2021-06-05 21:06:43,627 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 62.7ms TimeCoverageRelationStatistics Valid=75, Invalid=107, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:06:43,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13222 states. [2021-06-05 21:06:43,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13222 to 10426. [2021-06-05 21:06:43,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10426 states, 10425 states have (on average 2.6276258992805754) internal successors, (27393), 10425 states have internal predecessors, (27393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:43,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10426 states to 10426 states and 27393 transitions. [2021-06-05 21:06:43,772 INFO L78 Accepts]: Start accepts. Automaton has 10426 states and 27393 transitions. Word has length 53 [2021-06-05 21:06:43,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:06:43,772 INFO L482 AbstractCegarLoop]: Abstraction has 10426 states and 27393 transitions. [2021-06-05 21:06:43,772 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:43,772 INFO L276 IsEmpty]: Start isEmpty. Operand 10426 states and 27393 transitions. [2021-06-05 21:06:43,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 21:06:43,780 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:06:43,780 INFO L554 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:06:43,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable612 [2021-06-05 21:06:43,980 INFO L430 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:06:43,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:06:43,981 INFO L82 PathProgramCache]: Analyzing trace with hash 920384219, now seen corresponding path program 83 times [2021-06-05 21:06:43,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:06:43,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151545311] [2021-06-05 21:06:43,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:06:43,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:06:44,037 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 97 proven. 37 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:06:44,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:06:44,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151545311] [2021-06-05 21:06:44,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151545311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:06:44,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131122584] [2021-06-05 21:06:44,037 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:06:44,067 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-05 21:06:44,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:06:44,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:06:44,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:06:44,200 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 99 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:06:44,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131122584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:06:44,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:06:44,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 16] total 18 [2021-06-05 21:06:44,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178028271] [2021-06-05 21:06:44,200 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:06:44,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:06:44,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:06:44,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:06:44,201 INFO L87 Difference]: Start difference. First operand 10426 states and 27393 transitions. Second operand has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 18 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:44,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:06:44,577 INFO L93 Difference]: Finished difference Result 16570 states and 40721 transitions. [2021-06-05 21:06:44,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:06:44,577 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 18 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 21:06:44,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:06:44,595 INFO L225 Difference]: With dead ends: 16570 [2021-06-05 21:06:44,596 INFO L226 Difference]: Without dead ends: 16570 [2021-06-05 21:06:44,596 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 181.1ms TimeCoverageRelationStatistics Valid=240, Invalid=360, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:06:44,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16570 states. [2021-06-05 21:06:44,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16570 to 10440. [2021-06-05 21:06:44,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10440 states, 10439 states have (on average 2.627646326276463) internal successors, (27430), 10439 states have internal predecessors, (27430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:44,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10440 states to 10440 states and 27430 transitions. [2021-06-05 21:06:44,769 INFO L78 Accepts]: Start accepts. Automaton has 10440 states and 27430 transitions. Word has length 53 [2021-06-05 21:06:44,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:06:44,769 INFO L482 AbstractCegarLoop]: Abstraction has 10440 states and 27430 transitions. [2021-06-05 21:06:44,769 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 18 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:44,769 INFO L276 IsEmpty]: Start isEmpty. Operand 10440 states and 27430 transitions. [2021-06-05 21:06:44,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 21:06:44,777 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:06:44,777 INFO L554 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:06:44,977 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable614,306 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:06:44,977 INFO L430 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:06:44,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:06:44,978 INFO L82 PathProgramCache]: Analyzing trace with hash -717188237, now seen corresponding path program 84 times [2021-06-05 21:06:44,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:06:44,978 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646007336] [2021-06-05 21:06:44,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:06:44,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:06:45,043 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 94 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:06:45,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:06:45,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646007336] [2021-06-05 21:06:45,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646007336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:06:45,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851999458] [2021-06-05 21:06:45,044 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:06:45,072 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-05 21:06:45,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:06:45,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:06:45,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:06:45,172 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 104 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:06:45,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851999458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:06:45,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:06:45,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 14 [2021-06-05 21:06:45,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903523730] [2021-06-05 21:06:45,172 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:06:45,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:06:45,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:06:45,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:06:45,173 INFO L87 Difference]: Start difference. First operand 10440 states and 27430 transitions. Second operand has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:45,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:06:45,429 INFO L93 Difference]: Finished difference Result 13184 states and 32800 transitions. [2021-06-05 21:06:45,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:06:45,429 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 21:06:45,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:06:45,445 INFO L225 Difference]: With dead ends: 13184 [2021-06-05 21:06:45,445 INFO L226 Difference]: Without dead ends: 13184 [2021-06-05 21:06:45,445 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 106.7ms TimeCoverageRelationStatistics Valid=122, Invalid=184, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:06:45,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13184 states. [2021-06-05 21:06:45,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13184 to 10216. [2021-06-05 21:06:45,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10216 states, 10215 states have (on average 2.6215369554576604) internal successors, (26779), 10215 states have internal predecessors, (26779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:45,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10216 states to 10216 states and 26779 transitions. [2021-06-05 21:06:45,623 INFO L78 Accepts]: Start accepts. Automaton has 10216 states and 26779 transitions. Word has length 53 [2021-06-05 21:06:45,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:06:45,623 INFO L482 AbstractCegarLoop]: Abstraction has 10216 states and 26779 transitions. [2021-06-05 21:06:45,623 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:45,623 INFO L276 IsEmpty]: Start isEmpty. Operand 10216 states and 26779 transitions. [2021-06-05 21:06:45,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 21:06:45,631 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:06:45,631 INFO L554 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:06:45,831 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable615 [2021-06-05 21:06:45,831 INFO L430 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:06:45,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:06:45,831 INFO L82 PathProgramCache]: Analyzing trace with hash -2128038473, now seen corresponding path program 173 times [2021-06-05 21:06:45,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:06:45,832 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607716228] [2021-06-05 21:06:45,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:06:45,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:06:45,905 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 51 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:06:45,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:06:45,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607716228] [2021-06-05 21:06:45,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607716228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:06:45,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625226433] [2021-06-05 21:06:45,905 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:06:45,933 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 21:06:45,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:06:45,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:06:45,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:06:46,036 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 52 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:06:46,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625226433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:06:46,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:06:46,036 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 17 [2021-06-05 21:06:46,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204914429] [2021-06-05 21:06:46,036 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:06:46,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:06:46,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:06:46,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:06:46,037 INFO L87 Difference]: Start difference. First operand 10216 states and 26779 transitions. Second operand has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 17 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:46,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:06:46,311 INFO L93 Difference]: Finished difference Result 11730 states and 29482 transitions. [2021-06-05 21:06:46,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:06:46,311 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 17 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 21:06:46,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:06:46,324 INFO L225 Difference]: With dead ends: 11730 [2021-06-05 21:06:46,324 INFO L226 Difference]: Without dead ends: 11703 [2021-06-05 21:06:46,325 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 127.2ms TimeCoverageRelationStatistics Valid=121, Invalid=341, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:06:46,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11703 states. [2021-06-05 21:06:46,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11703 to 10216. [2021-06-05 21:06:46,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10216 states, 10215 states have (on average 2.6206558981889376) internal successors, (26770), 10215 states have internal predecessors, (26770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:46,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10216 states to 10216 states and 26770 transitions. [2021-06-05 21:06:46,467 INFO L78 Accepts]: Start accepts. Automaton has 10216 states and 26770 transitions. Word has length 53 [2021-06-05 21:06:46,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:06:46,467 INFO L482 AbstractCegarLoop]: Abstraction has 10216 states and 26770 transitions. [2021-06-05 21:06:46,467 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 17 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:46,467 INFO L276 IsEmpty]: Start isEmpty. Operand 10216 states and 26770 transitions. [2021-06-05 21:06:46,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 21:06:46,475 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:06:46,475 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:06:46,675 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable618,308 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:06:46,676 INFO L430 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:06:46,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:06:46,676 INFO L82 PathProgramCache]: Analyzing trace with hash -174590330, now seen corresponding path program 85 times [2021-06-05 21:06:46,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:06:46,676 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553057150] [2021-06-05 21:06:46,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:06:46,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:06:46,757 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 8 proven. 123 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:06:46,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:06:46,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553057150] [2021-06-05 21:06:46,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553057150] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:06:46,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748745492] [2021-06-05 21:06:46,758 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:06:46,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:06:46,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 21:06:46,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:06:46,859 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 124 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:06:46,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748745492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:06:46,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:06:46,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 21:06:46,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503416156] [2021-06-05 21:06:46,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:06:46,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:06:46,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:06:46,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:06:46,860 INFO L87 Difference]: Start difference. First operand 10216 states and 26770 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:47,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:06:47,264 INFO L93 Difference]: Finished difference Result 11688 states and 29696 transitions. [2021-06-05 21:06:47,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:06:47,264 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 21:06:47,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:06:47,276 INFO L225 Difference]: With dead ends: 11688 [2021-06-05 21:06:47,276 INFO L226 Difference]: Without dead ends: 11657 [2021-06-05 21:06:47,277 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 124.0ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:06:47,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11657 states. [2021-06-05 21:06:47,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11657 to 10380. [2021-06-05 21:06:47,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10380 states, 10379 states have (on average 2.618653049426727) internal successors, (27179), 10379 states have internal predecessors, (27179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:47,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10380 states to 10380 states and 27179 transitions. [2021-06-05 21:06:47,406 INFO L78 Accepts]: Start accepts. Automaton has 10380 states and 27179 transitions. Word has length 53 [2021-06-05 21:06:47,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:06:47,406 INFO L482 AbstractCegarLoop]: Abstraction has 10380 states and 27179 transitions. [2021-06-05 21:06:47,406 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:47,406 INFO L276 IsEmpty]: Start isEmpty. Operand 10380 states and 27179 transitions. [2021-06-05 21:06:47,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 21:06:47,413 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:06:47,413 INFO L554 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:06:47,614 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable623 [2021-06-05 21:06:47,614 INFO L430 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:06:47,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:06:47,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1728287187, now seen corresponding path program 174 times [2021-06-05 21:06:47,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:06:47,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256885276] [2021-06-05 21:06:47,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:06:47,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:06:47,662 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 48 proven. 83 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:06:47,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:06:47,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256885276] [2021-06-05 21:06:47,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256885276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:06:47,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052816268] [2021-06-05 21:06:47,662 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:06:47,690 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-05 21:06:47,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:06:47,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:06:47,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:06:47,761 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 48 proven. 83 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:06:47,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052816268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:06:47,761 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:06:47,761 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 21:06:47,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546207387] [2021-06-05 21:06:47,762 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:06:47,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:06:47,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:06:47,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:06:47,762 INFO L87 Difference]: Start difference. First operand 10380 states and 27179 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:47,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:06:47,909 INFO L93 Difference]: Finished difference Result 12057 states and 30158 transitions. [2021-06-05 21:06:47,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:06:47,909 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 21:06:47,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:06:47,922 INFO L225 Difference]: With dead ends: 12057 [2021-06-05 21:06:47,922 INFO L226 Difference]: Without dead ends: 12054 [2021-06-05 21:06:47,923 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 43.7ms TimeCoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:06:47,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12054 states. [2021-06-05 21:06:48,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12054 to 10366. [2021-06-05 21:06:48,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10366 states, 10365 states have (on average 2.6167872648335746) internal successors, (27123), 10365 states have internal predecessors, (27123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:48,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10366 states to 10366 states and 27123 transitions. [2021-06-05 21:06:48,105 INFO L78 Accepts]: Start accepts. Automaton has 10366 states and 27123 transitions. Word has length 53 [2021-06-05 21:06:48,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:06:48,105 INFO L482 AbstractCegarLoop]: Abstraction has 10366 states and 27123 transitions. [2021-06-05 21:06:48,105 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:48,105 INFO L276 IsEmpty]: Start isEmpty. Operand 10366 states and 27123 transitions. [2021-06-05 21:06:48,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 21:06:48,113 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:06:48,113 INFO L554 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:06:48,313 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 310 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable624 [2021-06-05 21:06:48,314 INFO L430 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:06:48,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:06:48,314 INFO L82 PathProgramCache]: Analyzing trace with hash -1521224621, now seen corresponding path program 175 times [2021-06-05 21:06:48,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:06:48,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241934898] [2021-06-05 21:06:48,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:06:48,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:06:48,385 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 43 proven. 88 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:06:48,386 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:06:48,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241934898] [2021-06-05 21:06:48,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241934898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:06:48,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756149461] [2021-06-05 21:06:48,386 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:06:48,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:06:48,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:06:48,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:06:48,492 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 43 proven. 88 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:06:48,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756149461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:06:48,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:06:48,492 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 21:06:48,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878188269] [2021-06-05 21:06:48,492 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:06:48,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:06:48,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:06:48,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:06:48,493 INFO L87 Difference]: Start difference. First operand 10366 states and 27123 transitions. Second operand has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:48,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:06:48,676 INFO L93 Difference]: Finished difference Result 12079 states and 30151 transitions. [2021-06-05 21:06:48,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:06:48,676 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 21:06:48,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:06:48,689 INFO L225 Difference]: With dead ends: 12079 [2021-06-05 21:06:48,689 INFO L226 Difference]: Without dead ends: 12061 [2021-06-05 21:06:48,689 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 77.7ms TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:06:48,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12061 states. [2021-06-05 21:06:48,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12061 to 10366. [2021-06-05 21:06:48,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10366 states, 10365 states have (on average 2.6144717800289436) internal successors, (27099), 10365 states have internal predecessors, (27099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:48,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10366 states to 10366 states and 27099 transitions. [2021-06-05 21:06:48,850 INFO L78 Accepts]: Start accepts. Automaton has 10366 states and 27099 transitions. Word has length 53 [2021-06-05 21:06:48,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:06:48,850 INFO L482 AbstractCegarLoop]: Abstraction has 10366 states and 27099 transitions. [2021-06-05 21:06:48,850 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:48,850 INFO L276 IsEmpty]: Start isEmpty. Operand 10366 states and 27099 transitions. [2021-06-05 21:06:48,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 21:06:48,858 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:06:48,858 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:06:49,058 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable626,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:06:49,058 INFO L430 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:06:49,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:06:49,059 INFO L82 PathProgramCache]: Analyzing trace with hash 1325742662, now seen corresponding path program 176 times [2021-06-05 21:06:49,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:06:49,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458923488] [2021-06-05 21:06:49,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:06:49,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:06:49,132 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 18 proven. 113 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:06:49,132 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:06:49,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458923488] [2021-06-05 21:06:49,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458923488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:06:49,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111413862] [2021-06-05 21:06:49,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:06:49,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:06:49,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:06:49,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 21:06:49,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:06:49,246 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 118 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:06:49,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111413862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:06:49,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:06:49,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 21:06:49,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709821728] [2021-06-05 21:06:49,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:06:49,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:06:49,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:06:49,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:06:49,247 INFO L87 Difference]: Start difference. First operand 10366 states and 27099 transitions. Second operand has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:49,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:06:49,823 INFO L93 Difference]: Finished difference Result 11156 states and 28494 transitions. [2021-06-05 21:06:49,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:06:49,823 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 21:06:49,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:06:49,836 INFO L225 Difference]: With dead ends: 11156 [2021-06-05 21:06:49,836 INFO L226 Difference]: Without dead ends: 11082 [2021-06-05 21:06:49,836 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 119.8ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:06:49,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11082 states. [2021-06-05 21:06:49,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11082 to 10344. [2021-06-05 21:06:49,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10344 states, 10343 states have (on average 2.61026781398047) internal successors, (26998), 10343 states have internal predecessors, (26998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:49,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10344 states to 10344 states and 26998 transitions. [2021-06-05 21:06:49,964 INFO L78 Accepts]: Start accepts. Automaton has 10344 states and 26998 transitions. Word has length 53 [2021-06-05 21:06:49,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:06:49,964 INFO L482 AbstractCegarLoop]: Abstraction has 10344 states and 26998 transitions. [2021-06-05 21:06:49,964 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) [2021-06-05 21:06:49,964 INFO L276 IsEmpty]: Start isEmpty. Operand 10344 states and 26998 transitions. [2021-06-05 21:06:49,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 21:06:49,971 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:06:49,971 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:06:50,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable629,312 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:06:50,172 INFO L430 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:06:50,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:06:50,172 INFO L82 PathProgramCache]: Analyzing trace with hash 712206482, now seen corresponding path program 177 times [2021-06-05 21:06:50,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:06:50,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049370580] [2021-06-05 21:06:50,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:06:50,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:06:50,250 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 114 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:06:50,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:06:50,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049370580] [2021-06-05 21:06:50,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049370580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:06:50,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136535076] [2021-06-05 21:06:50,250 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:06:50,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-06-05 21:06:50,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:06:50,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 21:06:50,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:06:50,354 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 115 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:06:50,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136535076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:06:50,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:06:50,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 21:06:50,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047421344] [2021-06-05 21:06:50,355 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:06:50,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:06:50,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:06:50,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:06:50,355 INFO L87 Difference]: Start difference. First operand 10344 states and 26998 transitions. Second operand has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:50,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:06:50,765 INFO L93 Difference]: Finished difference Result 11598 states and 29476 transitions. [2021-06-05 21:06:50,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:06:50,765 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 21:06:50,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:06:50,778 INFO L225 Difference]: With dead ends: 11598 [2021-06-05 21:06:50,778 INFO L226 Difference]: Without dead ends: 11586 [2021-06-05 21:06:50,779 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 121.0ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:06:50,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11586 states. [2021-06-05 21:06:50,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11586 to 10414. [2021-06-05 21:06:50,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10414 states, 10413 states have (on average 2.6087582829155864) internal successors, (27165), 10413 states have internal predecessors, (27165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:50,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10414 states to 10414 states and 27165 transitions. [2021-06-05 21:06:50,915 INFO L78 Accepts]: Start accepts. Automaton has 10414 states and 27165 transitions. Word has length 53 [2021-06-05 21:06:50,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:06:50,915 INFO L482 AbstractCegarLoop]: Abstraction has 10414 states and 27165 transitions. [2021-06-05 21:06:50,915 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:50,915 INFO L276 IsEmpty]: Start isEmpty. Operand 10414 states and 27165 transitions. [2021-06-05 21:06:50,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 21:06:50,922 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:06:50,922 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:06:51,123 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 313 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable630 [2021-06-05 21:06:51,123 INFO L430 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:06:51,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:06:51,123 INFO L82 PathProgramCache]: Analyzing trace with hash -1440843480, now seen corresponding path program 178 times [2021-06-05 21:06:51,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:06:51,123 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050540809] [2021-06-05 21:06:51,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:06:51,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:06:51,200 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 116 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:06:51,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:06:51,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050540809] [2021-06-05 21:06:51,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050540809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:06:51,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345427680] [2021-06-05 21:06:51,200 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:06:51,225 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:06:51,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:06:51,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 21:06:51,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:06:51,350 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 117 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:06:51,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345427680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:06:51,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:06:51,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 21:06:51,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064404686] [2021-06-05 21:06:51,351 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:06:51,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:06:51,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:06:51,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:06:51,351 INFO L87 Difference]: Start difference. First operand 10414 states and 27165 transitions. Second operand has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:51,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:06:51,894 INFO L93 Difference]: Finished difference Result 13130 states and 32846 transitions. [2021-06-05 21:06:51,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 21:06:51,895 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 21:06:51,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:06:51,910 INFO L225 Difference]: With dead ends: 13130 [2021-06-05 21:06:51,910 INFO L226 Difference]: Without dead ends: 13076 [2021-06-05 21:06:51,910 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 181.5ms TimeCoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:06:51,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13076 states. [2021-06-05 21:06:52,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13076 to 10595. [2021-06-05 21:06:52,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10595 states, 10594 states have (on average 2.60911836888805) internal successors, (27641), 10594 states have internal predecessors, (27641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:52,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10595 states to 10595 states and 27641 transitions. [2021-06-05 21:06:52,064 INFO L78 Accepts]: Start accepts. Automaton has 10595 states and 27641 transitions. Word has length 53 [2021-06-05 21:06:52,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:06:52,064 INFO L482 AbstractCegarLoop]: Abstraction has 10595 states and 27641 transitions. [2021-06-05 21:06:52,064 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:52,064 INFO L276 IsEmpty]: Start isEmpty. Operand 10595 states and 27641 transitions. [2021-06-05 21:06:52,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 21:06:52,072 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:06:52,073 INFO L554 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:06:52,273 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 314 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable631 [2021-06-05 21:06:52,273 INFO L430 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:06:52,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:06:52,273 INFO L82 PathProgramCache]: Analyzing trace with hash 91715629, now seen corresponding path program 179 times [2021-06-05 21:06:52,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:06:52,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754712513] [2021-06-05 21:06:52,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:06:52,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:06:52,338 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 38 proven. 96 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:06:52,338 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:06:52,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754712513] [2021-06-05 21:06:52,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754712513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:06:52,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785142998] [2021-06-05 21:06:52,338 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:06:52,366 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 21:06:52,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:06:52,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:06:52,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:06:52,463 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 39 proven. 96 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:06:52,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785142998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:06:52,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:06:52,463 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 15 [2021-06-05 21:06:52,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116379778] [2021-06-05 21:06:52,464 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:06:52,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:06:52,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:06:52,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:06:52,464 INFO L87 Difference]: Start difference. First operand 10595 states and 27641 transitions. Second operand has 16 states, 16 states have (on average 4.5625) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:52,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:06:52,714 INFO L93 Difference]: Finished difference Result 12473 states and 30997 transitions. [2021-06-05 21:06:52,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:06:52,715 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.5625) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 21:06:52,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:06:52,729 INFO L225 Difference]: With dead ends: 12473 [2021-06-05 21:06:52,730 INFO L226 Difference]: Without dead ends: 12449 [2021-06-05 21:06:52,730 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 101.6ms TimeCoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:06:52,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12449 states. [2021-06-05 21:06:52,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12449 to 10595. [2021-06-05 21:06:52,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10595 states, 10594 states have (on average 2.6075136869926374) internal successors, (27624), 10594 states have internal predecessors, (27624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:52,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10595 states to 10595 states and 27624 transitions. [2021-06-05 21:06:52,882 INFO L78 Accepts]: Start accepts. Automaton has 10595 states and 27624 transitions. Word has length 53 [2021-06-05 21:06:52,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:06:52,882 INFO L482 AbstractCegarLoop]: Abstraction has 10595 states and 27624 transitions. [2021-06-05 21:06:52,882 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.5625) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:52,882 INFO L276 IsEmpty]: Start isEmpty. Operand 10595 states and 27624 transitions. [2021-06-05 21:06:52,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 21:06:52,890 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:06:52,890 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:06:53,090 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable632,315 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:06:53,091 INFO L430 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:06:53,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:06:53,091 INFO L82 PathProgramCache]: Analyzing trace with hash -1286006946, now seen corresponding path program 180 times [2021-06-05 21:06:53,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:06:53,091 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719305381] [2021-06-05 21:06:53,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:06:53,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:06:53,177 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 116 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:06:53,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:06:53,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719305381] [2021-06-05 21:06:53,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719305381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:06:53,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699226980] [2021-06-05 21:06:53,177 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:06:53,208 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-06-05 21:06:53,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:06:53,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 21:06:53,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:06:53,282 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 117 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:06:53,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699226980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:06:53,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:06:53,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:06:53,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328306575] [2021-06-05 21:06:53,283 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:06:53,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:06:53,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:06:53,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:06:53,283 INFO L87 Difference]: Start difference. First operand 10595 states and 27624 transitions. Second operand has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:54,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:06:54,025 INFO L93 Difference]: Finished difference Result 15502 states and 38128 transitions. [2021-06-05 21:06:54,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 21:06:54,026 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 21:06:54,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:06:54,043 INFO L225 Difference]: With dead ends: 15502 [2021-06-05 21:06:54,043 INFO L226 Difference]: Without dead ends: 15388 [2021-06-05 21:06:54,044 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 302.2ms TimeCoverageRelationStatistics Valid=177, Invalid=1155, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 21:06:54,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15388 states. [2021-06-05 21:06:54,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15388 to 10752. [2021-06-05 21:06:54,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10752 states, 10751 states have (on average 2.607943447121198) internal successors, (28038), 10751 states have internal predecessors, (28038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:54,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10752 states to 10752 states and 28038 transitions. [2021-06-05 21:06:54,207 INFO L78 Accepts]: Start accepts. Automaton has 10752 states and 28038 transitions. Word has length 53 [2021-06-05 21:06:54,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:06:54,207 INFO L482 AbstractCegarLoop]: Abstraction has 10752 states and 28038 transitions. [2021-06-05 21:06:54,207 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:54,207 INFO L276 IsEmpty]: Start isEmpty. Operand 10752 states and 28038 transitions. [2021-06-05 21:06:54,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 21:06:54,214 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:06:54,214 INFO L554 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:06:54,415 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable636,316 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:06:54,415 INFO L430 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:06:54,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:06:54,415 INFO L82 PathProgramCache]: Analyzing trace with hash -899404269, now seen corresponding path program 181 times [2021-06-05 21:06:54,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:06:54,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747343513] [2021-06-05 21:06:54,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:06:54,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:06:54,549 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 39 proven. 95 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:06:54,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:06:54,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747343513] [2021-06-05 21:06:54,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747343513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:06:54,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907145760] [2021-06-05 21:06:54,549 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:06:54,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:06:54,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:06:54,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:06:54,671 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 39 proven. 95 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:06:54,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907145760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:06:54,671 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:06:54,671 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-05 21:06:54,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756831603] [2021-06-05 21:06:54,671 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:06:54,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:06:54,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:06:54,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:06:54,672 INFO L87 Difference]: Start difference. First operand 10752 states and 28038 transitions. Second operand has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:54,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:06:54,910 INFO L93 Difference]: Finished difference Result 12521 states and 31155 transitions. [2021-06-05 21:06:54,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:06:54,910 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 21:06:54,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:06:54,923 INFO L225 Difference]: With dead ends: 12521 [2021-06-05 21:06:54,924 INFO L226 Difference]: Without dead ends: 12488 [2021-06-05 21:06:54,924 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 150.2ms TimeCoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:06:54,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12488 states. [2021-06-05 21:06:55,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12488 to 10400. [2021-06-05 21:06:55,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10400 states, 10399 states have (on average 2.5997692085777477) internal successors, (27035), 10399 states have internal predecessors, (27035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:55,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10400 states to 10400 states and 27035 transitions. [2021-06-05 21:06:55,061 INFO L78 Accepts]: Start accepts. Automaton has 10400 states and 27035 transitions. Word has length 53 [2021-06-05 21:06:55,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:06:55,061 INFO L482 AbstractCegarLoop]: Abstraction has 10400 states and 27035 transitions. [2021-06-05 21:06:55,061 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:55,061 INFO L276 IsEmpty]: Start isEmpty. Operand 10400 states and 27035 transitions. [2021-06-05 21:06:55,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 21:06:55,068 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:06:55,068 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:06:55,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable637,317 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:06:55,269 INFO L430 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:06:55,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:06:55,269 INFO L82 PathProgramCache]: Analyzing trace with hash -1345698456, now seen corresponding path program 182 times [2021-06-05 21:06:55,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:06:55,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043552313] [2021-06-05 21:06:55,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:06:55,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:06:55,368 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 119 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:06:55,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:06:55,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043552313] [2021-06-05 21:06:55,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043552313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:06:55,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712458099] [2021-06-05 21:06:55,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:06:55,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:06:55,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:06:55,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 21:06:55,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:06:55,466 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 119 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:06:55,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712458099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:06:55,467 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:06:55,467 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 21:06:55,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605115879] [2021-06-05 21:06:55,467 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:06:55,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:06:55,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:06:55,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:06:55,467 INFO L87 Difference]: Start difference. First operand 10400 states and 27035 transitions. Second operand has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:56,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:06:56,056 INFO L93 Difference]: Finished difference Result 14179 states and 34868 transitions. [2021-06-05 21:06:56,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:06:56,056 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 21:06:56,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:06:56,072 INFO L225 Difference]: With dead ends: 14179 [2021-06-05 21:06:56,072 INFO L226 Difference]: Without dead ends: 14023 [2021-06-05 21:06:56,073 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 219.8ms TimeCoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:06:56,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14023 states. [2021-06-05 21:06:56,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14023 to 10040. [2021-06-05 21:06:56,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10040 states, 10039 states have (on average 2.592887737822492) internal successors, (26030), 10039 states have internal predecessors, (26030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:56,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10040 states to 10040 states and 26030 transitions. [2021-06-05 21:06:56,207 INFO L78 Accepts]: Start accepts. Automaton has 10040 states and 26030 transitions. Word has length 53 [2021-06-05 21:06:56,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:06:56,208 INFO L482 AbstractCegarLoop]: Abstraction has 10040 states and 26030 transitions. [2021-06-05 21:06:56,208 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:56,208 INFO L276 IsEmpty]: Start isEmpty. Operand 10040 states and 26030 transitions. [2021-06-05 21:06:56,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 21:06:56,215 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:06:56,215 INFO L554 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:06:56,415 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 318 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable642 [2021-06-05 21:06:56,415 INFO L430 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:06:56,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:06:56,415 INFO L82 PathProgramCache]: Analyzing trace with hash -1583759973, now seen corresponding path program 86 times [2021-06-05 21:06:56,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:06:56,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597690239] [2021-06-05 21:06:56,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:06:56,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:06:56,473 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 104 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:06:56,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:06:56,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597690239] [2021-06-05 21:06:56,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597690239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:06:56,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420859076] [2021-06-05 21:06:56,473 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:06:56,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:06:56,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:06:56,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:06:56,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:06:56,573 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 105 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:06:56,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420859076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:06:56,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:06:56,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 11 [2021-06-05 21:06:56,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658074760] [2021-06-05 21:06:56,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:06:56,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:06:56,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:06:56,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:06:56,574 INFO L87 Difference]: Start difference. First operand 10040 states and 26030 transitions. Second operand has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:56,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:06:56,763 INFO L93 Difference]: Finished difference Result 12926 states and 32056 transitions. [2021-06-05 21:06:56,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:06:56,763 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 21:06:56,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:06:56,778 INFO L225 Difference]: With dead ends: 12926 [2021-06-05 21:06:56,778 INFO L226 Difference]: Without dead ends: 12912 [2021-06-05 21:06:56,778 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 62.7ms TimeCoverageRelationStatistics Valid=74, Invalid=108, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:06:56,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12912 states. [2021-06-05 21:06:56,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12912 to 10415. [2021-06-05 21:06:56,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10415 states, 10414 states have (on average 2.6024582293067025) internal successors, (27102), 10414 states have internal predecessors, (27102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:56,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10415 states to 10415 states and 27102 transitions. [2021-06-05 21:06:56,921 INFO L78 Accepts]: Start accepts. Automaton has 10415 states and 27102 transitions. Word has length 53 [2021-06-05 21:06:56,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:06:56,921 INFO L482 AbstractCegarLoop]: Abstraction has 10415 states and 27102 transitions. [2021-06-05 21:06:56,921 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:56,921 INFO L276 IsEmpty]: Start isEmpty. Operand 10415 states and 27102 transitions. [2021-06-05 21:06:56,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 21:06:56,928 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:06:56,928 INFO L554 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:06:57,129 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable643 [2021-06-05 21:06:57,129 INFO L430 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:06:57,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:06:57,129 INFO L82 PathProgramCache]: Analyzing trace with hash 2089326913, now seen corresponding path program 87 times [2021-06-05 21:06:57,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:06:57,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870771977] [2021-06-05 21:06:57,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:06:57,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:06:57,185 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 104 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:06:57,185 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:06:57,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870771977] [2021-06-05 21:06:57,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870771977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:06:57,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914864345] [2021-06-05 21:06:57,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:06:57,215 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-06-05 21:06:57,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:06:57,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:06:57,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:06:57,302 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 109 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:06:57,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914864345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:06:57,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:06:57,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 12 [2021-06-05 21:06:57,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354452952] [2021-06-05 21:06:57,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:06:57,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:06:57,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:06:57,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:06:57,303 INFO L87 Difference]: Start difference. First operand 10415 states and 27102 transitions. Second operand has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:57,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:06:57,637 INFO L93 Difference]: Finished difference Result 13428 states and 33227 transitions. [2021-06-05 21:06:57,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:06:57,637 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 21:06:57,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:06:57,648 INFO L225 Difference]: With dead ends: 13428 [2021-06-05 21:06:57,648 INFO L226 Difference]: Without dead ends: 13428 [2021-06-05 21:06:57,648 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 117.9ms TimeCoverageRelationStatistics Valid=144, Invalid=198, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:06:57,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13428 states. [2021-06-05 21:06:57,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13428 to 10022. [2021-06-05 21:06:57,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10022 states, 10021 states have (on average 2.595150184612314) internal successors, (26006), 10021 states have internal predecessors, (26006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:57,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10022 states to 10022 states and 26006 transitions. [2021-06-05 21:06:57,785 INFO L78 Accepts]: Start accepts. Automaton has 10022 states and 26006 transitions. Word has length 53 [2021-06-05 21:06:57,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:06:57,785 INFO L482 AbstractCegarLoop]: Abstraction has 10022 states and 26006 transitions. [2021-06-05 21:06:57,785 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:57,785 INFO L276 IsEmpty]: Start isEmpty. Operand 10022 states and 26006 transitions. [2021-06-05 21:06:57,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 21:06:57,792 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:06:57,792 INFO L554 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:06:57,993 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 320 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable645 [2021-06-05 21:06:57,993 INFO L430 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:06:57,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:06:57,993 INFO L82 PathProgramCache]: Analyzing trace with hash 547874413, now seen corresponding path program 183 times [2021-06-05 21:06:57,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:06:57,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350215629] [2021-06-05 21:06:57,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:06:57,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:06:58,075 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 47 proven. 88 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:06:58,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:06:58,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350215629] [2021-06-05 21:06:58,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350215629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:06:58,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561093207] [2021-06-05 21:06:58,075 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:06:58,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 21:06:58,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:06:58,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:06:58,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:06:58,177 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 47 proven. 88 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:06:58,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561093207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:06:58,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:06:58,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-06-05 21:06:58,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17805634] [2021-06-05 21:06:58,177 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:06:58,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:06:58,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:06:58,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:06:58,178 INFO L87 Difference]: Start difference. First operand 10022 states and 26006 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:58,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:06:58,446 INFO L93 Difference]: Finished difference Result 11503 states and 28619 transitions. [2021-06-05 21:06:58,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:06:58,446 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 21:06:58,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:06:58,458 INFO L225 Difference]: With dead ends: 11503 [2021-06-05 21:06:58,459 INFO L226 Difference]: Without dead ends: 11467 [2021-06-05 21:06:58,459 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 110.9ms TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:06:58,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11467 states. [2021-06-05 21:06:58,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11467 to 10022. [2021-06-05 21:06:58,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10022 states, 10021 states have (on average 2.5942520706516317) internal successors, (25997), 10021 states have internal predecessors, (25997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:58,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10022 states to 10022 states and 25997 transitions. [2021-06-05 21:06:58,584 INFO L78 Accepts]: Start accepts. Automaton has 10022 states and 25997 transitions. Word has length 53 [2021-06-05 21:06:58,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:06:58,584 INFO L482 AbstractCegarLoop]: Abstraction has 10022 states and 25997 transitions. [2021-06-05 21:06:58,584 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:58,584 INFO L276 IsEmpty]: Start isEmpty. Operand 10022 states and 25997 transitions. [2021-06-05 21:06:58,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 21:06:58,591 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:06:58,591 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:06:58,791 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable648,321 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:06:58,791 INFO L430 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:06:58,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:06:58,791 INFO L82 PathProgramCache]: Analyzing trace with hash 355684522, now seen corresponding path program 88 times [2021-06-05 21:06:58,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:06:58,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759783697] [2021-06-05 21:06:58,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:06:58,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:06:58,874 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 8 proven. 123 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:06:58,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:06:58,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759783697] [2021-06-05 21:06:58,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759783697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:06:58,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288129537] [2021-06-05 21:06:58,875 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:06:58,901 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:06:58,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:06:58,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 21:06:58,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:06:58,975 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 124 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:06:58,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288129537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:06:58,975 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:06:58,975 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 21:06:58,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340193896] [2021-06-05 21:06:58,975 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:06:58,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:06:58,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:06:58,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:06:58,976 INFO L87 Difference]: Start difference. First operand 10022 states and 25997 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:59,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:06:59,384 INFO L93 Difference]: Finished difference Result 11456 states and 28845 transitions. [2021-06-05 21:06:59,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:06:59,384 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 21:06:59,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:06:59,395 INFO L225 Difference]: With dead ends: 11456 [2021-06-05 21:06:59,396 INFO L226 Difference]: Without dead ends: 11434 [2021-06-05 21:06:59,396 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 123.6ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:06:59,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11434 states. [2021-06-05 21:06:59,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11434 to 10210. [2021-06-05 21:06:59,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10210 states, 10209 states have (on average 2.591928690371241) internal successors, (26461), 10209 states have internal predecessors, (26461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:59,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10210 states to 10210 states and 26461 transitions. [2021-06-05 21:06:59,522 INFO L78 Accepts]: Start accepts. Automaton has 10210 states and 26461 transitions. Word has length 53 [2021-06-05 21:06:59,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:06:59,522 INFO L482 AbstractCegarLoop]: Abstraction has 10210 states and 26461 transitions. [2021-06-05 21:06:59,522 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:59,523 INFO L276 IsEmpty]: Start isEmpty. Operand 10210 states and 26461 transitions. [2021-06-05 21:06:59,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 21:06:59,529 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:06:59,530 INFO L554 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:06:59,730 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 322 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable654 [2021-06-05 21:06:59,730 INFO L430 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:06:59,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:06:59,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1198012335, now seen corresponding path program 184 times [2021-06-05 21:06:59,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:06:59,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748179956] [2021-06-05 21:06:59,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:06:59,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:06:59,780 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 50 proven. 81 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:06:59,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:06:59,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748179956] [2021-06-05 21:06:59,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748179956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:06:59,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943396238] [2021-06-05 21:06:59,780 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:06:59,805 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:06:59,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:06:59,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:06:59,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:06:59,877 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 50 proven. 81 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:06:59,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943396238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:06:59,877 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:06:59,877 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 21:06:59,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118778282] [2021-06-05 21:06:59,877 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:06:59,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:06:59,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:06:59,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:06:59,878 INFO L87 Difference]: Start difference. First operand 10210 states and 26461 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:00,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:07:00,023 INFO L93 Difference]: Finished difference Result 11989 states and 29653 transitions. [2021-06-05 21:07:00,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:07:00,024 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 21:07:00,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:07:00,035 INFO L225 Difference]: With dead ends: 11989 [2021-06-05 21:07:00,035 INFO L226 Difference]: Without dead ends: 11986 [2021-06-05 21:07:00,035 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 45.2ms TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:07:00,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11986 states. [2021-06-05 21:07:00,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11986 to 10202. [2021-06-05 21:07:00,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10202 states, 10201 states have (on average 2.5904323105577887) internal successors, (26425), 10201 states have internal predecessors, (26425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:00,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10202 states to 10202 states and 26425 transitions. [2021-06-05 21:07:00,169 INFO L78 Accepts]: Start accepts. Automaton has 10202 states and 26425 transitions. Word has length 53 [2021-06-05 21:07:00,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:07:00,169 INFO L482 AbstractCegarLoop]: Abstraction has 10202 states and 26425 transitions. [2021-06-05 21:07:00,169 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:00,169 INFO L276 IsEmpty]: Start isEmpty. Operand 10202 states and 26425 transitions. [2021-06-05 21:07:00,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 21:07:00,177 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:07:00,177 INFO L554 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:07:00,377 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable655,323 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:07:00,377 INFO L430 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:07:00,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:07:00,378 INFO L82 PathProgramCache]: Analyzing trace with hash -990949769, now seen corresponding path program 185 times [2021-06-05 21:07:00,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:07:00,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057630983] [2021-06-05 21:07:00,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:07:00,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:07:00,446 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 44 proven. 87 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:07:00,446 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:07:00,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057630983] [2021-06-05 21:07:00,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057630983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:00,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083454797] [2021-06-05 21:07:00,447 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:07:00,494 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-06-05 21:07:00,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:07:00,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:07:00,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:07:00,672 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 48 proven. 87 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:07:00,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083454797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:00,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:07:00,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 13 [2021-06-05 21:07:00,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939196931] [2021-06-05 21:07:00,673 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:07:00,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:07:00,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:07:00,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:07:00,673 INFO L87 Difference]: Start difference. First operand 10202 states and 26425 transitions. Second operand has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:00,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:07:00,917 INFO L93 Difference]: Finished difference Result 12152 states and 29947 transitions. [2021-06-05 21:07:00,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:07:00,917 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 21:07:00,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:07:00,929 INFO L225 Difference]: With dead ends: 12152 [2021-06-05 21:07:00,930 INFO L226 Difference]: Without dead ends: 12134 [2021-06-05 21:07:00,930 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 97.6ms TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:07:00,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12134 states. [2021-06-05 21:07:01,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12134 to 10202. [2021-06-05 21:07:01,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10202 states, 10201 states have (on average 2.5880796000392117) internal successors, (26401), 10201 states have internal predecessors, (26401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:01,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10202 states to 10202 states and 26401 transitions. [2021-06-05 21:07:01,051 INFO L78 Accepts]: Start accepts. Automaton has 10202 states and 26401 transitions. Word has length 53 [2021-06-05 21:07:01,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:07:01,052 INFO L482 AbstractCegarLoop]: Abstraction has 10202 states and 26401 transitions. [2021-06-05 21:07:01,052 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:01,052 INFO L276 IsEmpty]: Start isEmpty. Operand 10202 states and 26401 transitions. [2021-06-05 21:07:01,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 21:07:01,059 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:07:01,059 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:07:01,259 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 324 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable657 [2021-06-05 21:07:01,259 INFO L430 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:07:01,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:07:01,260 INFO L82 PathProgramCache]: Analyzing trace with hash 1856017514, now seen corresponding path program 186 times [2021-06-05 21:07:01,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:07:01,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600690855] [2021-06-05 21:07:01,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:07:01,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:07:01,332 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 18 proven. 113 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:07:01,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:07:01,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600690855] [2021-06-05 21:07:01,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600690855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:01,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882216158] [2021-06-05 21:07:01,333 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:07:01,364 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-06-05 21:07:01,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:07:01,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 21:07:01,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:07:01,453 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 118 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:07:01,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882216158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:01,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:07:01,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 21:07:01,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18187111] [2021-06-05 21:07:01,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:07:01,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:07:01,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:07:01,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:07:01,454 INFO L87 Difference]: Start difference. First operand 10202 states and 26401 transitions. Second operand has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:01,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:07:01,984 INFO L93 Difference]: Finished difference Result 11006 states and 27812 transitions. [2021-06-05 21:07:01,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:07:01,984 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 21:07:01,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:07:01,995 INFO L225 Difference]: With dead ends: 11006 [2021-06-05 21:07:01,995 INFO L226 Difference]: Without dead ends: 10914 [2021-06-05 21:07:01,995 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 119.1ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:07:02,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10914 states. [2021-06-05 21:07:02,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10914 to 10195. [2021-06-05 21:07:02,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10195 states, 10194 states have (on average 2.581518540317834) internal successors, (26316), 10194 states have internal predecessors, (26316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:02,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10195 states to 10195 states and 26316 transitions. [2021-06-05 21:07:02,129 INFO L78 Accepts]: Start accepts. Automaton has 10195 states and 26316 transitions. Word has length 53 [2021-06-05 21:07:02,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:07:02,129 INFO L482 AbstractCegarLoop]: Abstraction has 10195 states and 26316 transitions. [2021-06-05 21:07:02,129 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) [2021-06-05 21:07:02,129 INFO L276 IsEmpty]: Start isEmpty. Operand 10195 states and 26316 transitions. [2021-06-05 21:07:02,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 21:07:02,136 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:07:02,136 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:07:02,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable660,325 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:07:02,341 INFO L430 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:07:02,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:07:02,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1242481334, now seen corresponding path program 187 times [2021-06-05 21:07:02,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:07:02,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459973725] [2021-06-05 21:07:02,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:07:02,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:07:02,419 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 114 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:07:02,420 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:07:02,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459973725] [2021-06-05 21:07:02,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459973725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:02,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942656575] [2021-06-05 21:07:02,420 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:07:02,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:07:02,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 21:07:02,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:07:02,519 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 115 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:07:02,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942656575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:02,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:07:02,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 21:07:02,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327061805] [2021-06-05 21:07:02,519 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:07:02,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:07:02,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:07:02,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:07:02,520 INFO L87 Difference]: Start difference. First operand 10195 states and 26316 transitions. Second operand has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:02,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:07:02,922 INFO L93 Difference]: Finished difference Result 11506 states and 28913 transitions. [2021-06-05 21:07:02,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:07:02,922 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 21:07:02,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:07:02,934 INFO L225 Difference]: With dead ends: 11506 [2021-06-05 21:07:02,934 INFO L226 Difference]: Without dead ends: 11494 [2021-06-05 21:07:02,934 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 120.8ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:07:02,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11494 states. [2021-06-05 21:07:03,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11494 to 10289. [2021-06-05 21:07:03,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10289 states, 10288 states have (on average 2.5804821150855366) internal successors, (26548), 10288 states have internal predecessors, (26548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:03,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10289 states to 10289 states and 26548 transitions. [2021-06-05 21:07:03,068 INFO L78 Accepts]: Start accepts. Automaton has 10289 states and 26548 transitions. Word has length 53 [2021-06-05 21:07:03,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:07:03,068 INFO L482 AbstractCegarLoop]: Abstraction has 10289 states and 26548 transitions. [2021-06-05 21:07:03,068 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:03,068 INFO L276 IsEmpty]: Start isEmpty. Operand 10289 states and 26548 transitions. [2021-06-05 21:07:03,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 21:07:03,075 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:07:03,075 INFO L554 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:07:03,275 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable661 [2021-06-05 21:07:03,276 INFO L430 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:07:03,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:07:03,276 INFO L82 PathProgramCache]: Analyzing trace with hash 1085181847, now seen corresponding path program 89 times [2021-06-05 21:07:03,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:07:03,276 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659545458] [2021-06-05 21:07:03,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:07:03,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:07:03,343 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 87 proven. 47 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:07:03,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:07:03,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659545458] [2021-06-05 21:07:03,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659545458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:03,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524066886] [2021-06-05 21:07:03,343 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:07:03,373 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-06-05 21:07:03,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:07:03,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:07:03,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:07:03,464 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 89 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:07:03,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524066886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:03,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:07:03,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 13 [2021-06-05 21:07:03,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287369161] [2021-06-05 21:07:03,465 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:07:03,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:07:03,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:07:03,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:07:03,465 INFO L87 Difference]: Start difference. First operand 10289 states and 26548 transitions. Second operand has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:03,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:07:03,672 INFO L93 Difference]: Finished difference Result 12783 states and 31677 transitions. [2021-06-05 21:07:03,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:07:03,673 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 21:07:03,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:07:03,686 INFO L225 Difference]: With dead ends: 12783 [2021-06-05 21:07:03,686 INFO L226 Difference]: Without dead ends: 12763 [2021-06-05 21:07:03,686 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 94.2ms TimeCoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:07:03,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12763 states. [2021-06-05 21:07:03,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12763 to 10650. [2021-06-05 21:07:03,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10650 states, 10649 states have (on average 2.5842802141046106) internal successors, (27520), 10649 states have internal predecessors, (27520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:03,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10650 states to 10650 states and 27520 transitions. [2021-06-05 21:07:03,872 INFO L78 Accepts]: Start accepts. Automaton has 10650 states and 27520 transitions. Word has length 53 [2021-06-05 21:07:03,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:07:03,872 INFO L482 AbstractCegarLoop]: Abstraction has 10650 states and 27520 transitions. [2021-06-05 21:07:03,872 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:03,872 INFO L276 IsEmpty]: Start isEmpty. Operand 10650 states and 27520 transitions. [2021-06-05 21:07:03,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 21:07:03,879 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:07:03,879 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:07:04,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 327 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable662 [2021-06-05 21:07:04,080 INFO L430 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:07:04,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:07:04,080 INFO L82 PathProgramCache]: Analyzing trace with hash -910568628, now seen corresponding path program 188 times [2021-06-05 21:07:04,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:07:04,080 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858181565] [2021-06-05 21:07:04,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:07:04,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:07:04,164 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 116 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:07:04,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:07:04,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858181565] [2021-06-05 21:07:04,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858181565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:04,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919854965] [2021-06-05 21:07:04,164 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:07:04,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:07:04,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:07:04,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 21:07:04,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:07:04,272 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 117 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:07:04,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919854965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:04,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:07:04,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 21:07:04,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021073566] [2021-06-05 21:07:04,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:07:04,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:07:04,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:07:04,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:07:04,273 INFO L87 Difference]: Start difference. First operand 10650 states and 27520 transitions. Second operand has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:04,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:07:04,898 INFO L93 Difference]: Finished difference Result 13521 states and 33551 transitions. [2021-06-05 21:07:04,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 21:07:04,899 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 21:07:04,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:07:04,912 INFO L225 Difference]: With dead ends: 13521 [2021-06-05 21:07:04,912 INFO L226 Difference]: Without dead ends: 13467 [2021-06-05 21:07:04,912 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 214.7ms TimeCoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:07:04,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13467 states. [2021-06-05 21:07:05,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13467 to 10945. [2021-06-05 21:07:05,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10945 states, 10944 states have (on average 2.5868055555555554) internal successors, (28310), 10944 states have internal predecessors, (28310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:05,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10945 states to 10945 states and 28310 transitions. [2021-06-05 21:07:05,071 INFO L78 Accepts]: Start accepts. Automaton has 10945 states and 28310 transitions. Word has length 53 [2021-06-05 21:07:05,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:07:05,071 INFO L482 AbstractCegarLoop]: Abstraction has 10945 states and 28310 transitions. [2021-06-05 21:07:05,071 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:05,071 INFO L276 IsEmpty]: Start isEmpty. Operand 10945 states and 28310 transitions. [2021-06-05 21:07:05,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 21:07:05,078 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:07:05,078 INFO L554 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:07:05,279 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable665,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:07:05,279 INFO L430 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:07:05,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:07:05,279 INFO L82 PathProgramCache]: Analyzing trace with hash 621990481, now seen corresponding path program 189 times [2021-06-05 21:07:05,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:07:05,279 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847723090] [2021-06-05 21:07:05,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:07:05,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:07:05,344 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 36 proven. 98 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:07:05,344 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:07:05,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847723090] [2021-06-05 21:07:05,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847723090] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:05,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709623384] [2021-06-05 21:07:05,344 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:07:05,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-06-05 21:07:05,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:07:05,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:07:05,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:07:05,447 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 36 proven. 98 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:07:05,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709623384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:05,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:07:05,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 21:07:05,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359245029] [2021-06-05 21:07:05,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:07:05,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:07:05,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:07:05,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:07:05,448 INFO L87 Difference]: Start difference. First operand 10945 states and 28310 transitions. Second operand has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:05,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:07:05,643 INFO L93 Difference]: Finished difference Result 12806 states and 31626 transitions. [2021-06-05 21:07:05,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:07:05,644 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 21:07:05,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:07:05,658 INFO L225 Difference]: With dead ends: 12806 [2021-06-05 21:07:05,659 INFO L226 Difference]: Without dead ends: 12782 [2021-06-05 21:07:05,659 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 75.8ms TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:07:05,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12782 states. [2021-06-05 21:07:05,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12782 to 10945. [2021-06-05 21:07:05,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10945 states, 10944 states have (on average 2.5852521929824563) internal successors, (28293), 10944 states have internal predecessors, (28293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:05,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10945 states to 10945 states and 28293 transitions. [2021-06-05 21:07:05,819 INFO L78 Accepts]: Start accepts. Automaton has 10945 states and 28293 transitions. Word has length 53 [2021-06-05 21:07:05,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:07:05,819 INFO L482 AbstractCegarLoop]: Abstraction has 10945 states and 28293 transitions. [2021-06-05 21:07:05,819 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:05,819 INFO L276 IsEmpty]: Start isEmpty. Operand 10945 states and 28293 transitions. [2021-06-05 21:07:05,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 21:07:05,827 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:07:05,827 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:07:06,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 329 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable666 [2021-06-05 21:07:06,028 INFO L430 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:07:06,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:07:06,028 INFO L82 PathProgramCache]: Analyzing trace with hash -755732094, now seen corresponding path program 190 times [2021-06-05 21:07:06,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:07:06,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396061643] [2021-06-05 21:07:06,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:07:06,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:07:06,115 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 116 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:07:06,115 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:07:06,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396061643] [2021-06-05 21:07:06,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396061643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:06,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437584369] [2021-06-05 21:07:06,115 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:07:06,141 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:07:06,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:07:06,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 21:07:06,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:07:06,215 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 117 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:07:06,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437584369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:06,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:07:06,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:07:06,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698123391] [2021-06-05 21:07:06,215 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:07:06,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:07:06,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:07:06,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:07:06,216 INFO L87 Difference]: Start difference. First operand 10945 states and 28293 transitions. Second operand has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:07,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:07:07,082 INFO L93 Difference]: Finished difference Result 17261 states and 41917 transitions. [2021-06-05 21:07:07,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 21:07:07,083 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 21:07:07,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:07:07,102 INFO L225 Difference]: With dead ends: 17261 [2021-06-05 21:07:07,102 INFO L226 Difference]: Without dead ends: 17081 [2021-06-05 21:07:07,102 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 363.6ms TimeCoverageRelationStatistics Valid=225, Invalid=1581, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 21:07:07,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17081 states. [2021-06-05 21:07:07,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17081 to 11484. [2021-06-05 21:07:07,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11484 states, 11483 states have (on average 2.586432117042585) internal successors, (29700), 11483 states have internal predecessors, (29700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:07,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11484 states to 11484 states and 29700 transitions. [2021-06-05 21:07:07,279 INFO L78 Accepts]: Start accepts. Automaton has 11484 states and 29700 transitions. Word has length 53 [2021-06-05 21:07:07,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:07:07,279 INFO L482 AbstractCegarLoop]: Abstraction has 11484 states and 29700 transitions. [2021-06-05 21:07:07,279 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:07,279 INFO L276 IsEmpty]: Start isEmpty. Operand 11484 states and 29700 transitions. [2021-06-05 21:07:07,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 21:07:07,287 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:07:07,287 INFO L554 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:07:07,487 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable670,330 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:07:07,487 INFO L430 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:07:07,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:07:07,488 INFO L82 PathProgramCache]: Analyzing trace with hash -369129417, now seen corresponding path program 191 times [2021-06-05 21:07:07,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:07:07,488 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618742811] [2021-06-05 21:07:07,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:07:07,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:07:07,566 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 34 proven. 100 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:07:07,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:07:07,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618742811] [2021-06-05 21:07:07,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618742811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:07,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678817649] [2021-06-05 21:07:07,567 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:07:07,595 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 21:07:07,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:07:07,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:07:07,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:07:07,738 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 34 proven. 100 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:07:07,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678817649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:07,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:07:07,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 15 [2021-06-05 21:07:07,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940701456] [2021-06-05 21:07:07,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:07:07,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:07:07,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:07:07,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:07:07,739 INFO L87 Difference]: Start difference. First operand 11484 states and 29700 transitions. Second operand has 16 states, 16 states have (on average 4.375) internal successors, (70), 15 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:08,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:07:08,043 INFO L93 Difference]: Finished difference Result 13565 states and 33450 transitions. [2021-06-05 21:07:08,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:07:08,043 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.375) internal successors, (70), 15 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 21:07:08,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:07:08,059 INFO L225 Difference]: With dead ends: 13565 [2021-06-05 21:07:08,059 INFO L226 Difference]: Without dead ends: 13532 [2021-06-05 21:07:08,060 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 117.4ms TimeCoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:07:08,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13532 states. [2021-06-05 21:07:08,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13532 to 11484. [2021-06-05 21:07:08,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11484 states, 11483 states have (on average 2.58564834973439) internal successors, (29691), 11483 states have internal predecessors, (29691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:08,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11484 states to 11484 states and 29691 transitions. [2021-06-05 21:07:08,228 INFO L78 Accepts]: Start accepts. Automaton has 11484 states and 29691 transitions. Word has length 53 [2021-06-05 21:07:08,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:07:08,228 INFO L482 AbstractCegarLoop]: Abstraction has 11484 states and 29691 transitions. [2021-06-05 21:07:08,228 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.375) internal successors, (70), 15 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:08,228 INFO L276 IsEmpty]: Start isEmpty. Operand 11484 states and 29691 transitions. [2021-06-05 21:07:08,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 21:07:08,236 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:07:08,236 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:07:08,437 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable671,331 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:07:08,437 INFO L430 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:07:08,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:07:08,437 INFO L82 PathProgramCache]: Analyzing trace with hash -815423604, now seen corresponding path program 192 times [2021-06-05 21:07:08,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:07:08,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818779907] [2021-06-05 21:07:08,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:07:08,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:07:08,533 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 116 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:07:08,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:07:08,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818779907] [2021-06-05 21:07:08,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818779907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:08,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63685531] [2021-06-05 21:07:08,534 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:07:08,564 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-06-05 21:07:08,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:07:08,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 21:07:08,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:07:08,638 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 117 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:07:08,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63685531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:08,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:07:08,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 21:07:08,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450408326] [2021-06-05 21:07:08,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:07:08,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:07:08,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:07:08,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:07:08,639 INFO L87 Difference]: Start difference. First operand 11484 states and 29691 transitions. Second operand has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:09,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:07:09,825 INFO L93 Difference]: Finished difference Result 21447 states and 51505 transitions. [2021-06-05 21:07:09,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 21:07:09,825 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 21:07:09,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:07:09,850 INFO L225 Difference]: With dead ends: 21447 [2021-06-05 21:07:09,851 INFO L226 Difference]: Without dead ends: 21171 [2021-06-05 21:07:09,851 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1425 ImplicationChecksByTransitivity, 655.6ms TimeCoverageRelationStatistics Valid=495, Invalid=3927, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 21:07:09,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21171 states. [2021-06-05 21:07:10,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21171 to 11987. [2021-06-05 21:07:10,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11987 states, 11986 states have (on average 2.5869347572167527) internal successors, (31007), 11986 states have internal predecessors, (31007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:10,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11987 states to 11987 states and 31007 transitions. [2021-06-05 21:07:10,063 INFO L78 Accepts]: Start accepts. Automaton has 11987 states and 31007 transitions. Word has length 53 [2021-06-05 21:07:10,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:07:10,063 INFO L482 AbstractCegarLoop]: Abstraction has 11987 states and 31007 transitions. [2021-06-05 21:07:10,063 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:10,064 INFO L276 IsEmpty]: Start isEmpty. Operand 11987 states and 31007 transitions. [2021-06-05 21:07:10,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 21:07:10,072 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:07:10,072 INFO L554 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:07:10,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable676,332 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:07:10,273 INFO L430 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:07:10,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:07:10,273 INFO L82 PathProgramCache]: Analyzing trace with hash 1078149265, now seen corresponding path program 193 times [2021-06-05 21:07:10,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:07:10,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601632828] [2021-06-05 21:07:10,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:07:10,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:07:10,356 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 38 proven. 96 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:07:10,356 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:07:10,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601632828] [2021-06-05 21:07:10,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601632828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:10,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701814044] [2021-06-05 21:07:10,357 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:07:10,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:07:10,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:07:10,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:07:10,456 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 38 proven. 96 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:07:10,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701814044] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:10,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:07:10,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-06-05 21:07:10,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514128238] [2021-06-05 21:07:10,457 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:07:10,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:07:10,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:07:10,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:07:10,457 INFO L87 Difference]: Start difference. First operand 11987 states and 31007 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:10,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:07:10,708 INFO L93 Difference]: Finished difference Result 14020 states and 34646 transitions. [2021-06-05 21:07:10,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:07:10,708 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 21:07:10,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:07:10,723 INFO L225 Difference]: With dead ends: 14020 [2021-06-05 21:07:10,723 INFO L226 Difference]: Without dead ends: 13978 [2021-06-05 21:07:10,723 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 112.6ms TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:07:10,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13978 states. [2021-06-05 21:07:10,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13978 to 11653. [2021-06-05 21:07:10,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11653 states, 11652 states have (on average 2.5810161345691727) internal successors, (30074), 11652 states have internal predecessors, (30074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:10,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11653 states to 11653 states and 30074 transitions. [2021-06-05 21:07:10,877 INFO L78 Accepts]: Start accepts. Automaton has 11653 states and 30074 transitions. Word has length 53 [2021-06-05 21:07:10,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:07:10,877 INFO L482 AbstractCegarLoop]: Abstraction has 11653 states and 30074 transitions. [2021-06-05 21:07:10,877 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:10,877 INFO L276 IsEmpty]: Start isEmpty. Operand 11653 states and 30074 transitions. [2021-06-05 21:07:10,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 21:07:10,884 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:07:10,884 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:07:11,085 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 333 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable677 [2021-06-05 21:07:11,085 INFO L430 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:07:11,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:07:11,085 INFO L82 PathProgramCache]: Analyzing trace with hash -968737470, now seen corresponding path program 194 times [2021-06-05 21:07:11,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:07:11,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901173252] [2021-06-05 21:07:11,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:07:11,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:07:11,192 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 119 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:07:11,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:07:11,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901173252] [2021-06-05 21:07:11,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901173252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:11,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607474053] [2021-06-05 21:07:11,193 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:07:11,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:07:11,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:07:11,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 21:07:11,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:07:11,292 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 119 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:07:11,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607474053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:11,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:07:11,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:07:11,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733572287] [2021-06-05 21:07:11,292 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:07:11,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:07:11,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:07:11,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:07:11,293 INFO L87 Difference]: Start difference. First operand 11653 states and 30074 transitions. Second operand has 15 states, 15 states have (on average 3.6) internal successors, (54), 14 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:11,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:07:11,968 INFO L93 Difference]: Finished difference Result 16353 states and 39527 transitions. [2021-06-05 21:07:11,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:07:11,969 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 14 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 21:07:11,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:07:11,988 INFO L225 Difference]: With dead ends: 16353 [2021-06-05 21:07:11,988 INFO L226 Difference]: Without dead ends: 15975 [2021-06-05 21:07:11,988 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 298.2ms TimeCoverageRelationStatistics Valid=138, Invalid=732, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:07:12,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15975 states. [2021-06-05 21:07:12,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15975 to 10369. [2021-06-05 21:07:12,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10369 states, 10368 states have (on average 2.568672839506173) internal successors, (26632), 10368 states have internal predecessors, (26632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:12,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10369 states to 10369 states and 26632 transitions. [2021-06-05 21:07:12,155 INFO L78 Accepts]: Start accepts. Automaton has 10369 states and 26632 transitions. Word has length 53 [2021-06-05 21:07:12,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:07:12,155 INFO L482 AbstractCegarLoop]: Abstraction has 10369 states and 26632 transitions. [2021-06-05 21:07:12,155 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 14 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:12,155 INFO L276 IsEmpty]: Start isEmpty. Operand 10369 states and 26632 transitions. [2021-06-05 21:07:12,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 21:07:12,163 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:07:12,163 INFO L554 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:07:12,363 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable683,334 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:07:12,363 INFO L430 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:07:12,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:07:12,363 INFO L82 PathProgramCache]: Analyzing trace with hash -1828679397, now seen corresponding path program 90 times [2021-06-05 21:07:12,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:07:12,364 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976702392] [2021-06-05 21:07:12,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:07:12,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:07:12,426 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 105 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:07:12,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:07:12,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976702392] [2021-06-05 21:07:12,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976702392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:12,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30662366] [2021-06-05 21:07:12,427 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:07:12,456 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-06-05 21:07:12,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:07:12,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:07:12,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:07:12,535 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 106 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:07:12,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30662366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:12,536 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:07:12,536 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 11 [2021-06-05 21:07:12,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443288224] [2021-06-05 21:07:12,536 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:07:12,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:07:12,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:07:12,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:07:12,536 INFO L87 Difference]: Start difference. First operand 10369 states and 26632 transitions. Second operand has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:12,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:07:12,762 INFO L93 Difference]: Finished difference Result 15824 states and 38717 transitions. [2021-06-05 21:07:12,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:07:12,762 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 21:07:12,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:07:12,778 INFO L225 Difference]: With dead ends: 15824 [2021-06-05 21:07:12,779 INFO L226 Difference]: Without dead ends: 15824 [2021-06-05 21:07:12,779 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 93.8ms TimeCoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:07:12,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15824 states. [2021-06-05 21:07:12,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15824 to 10590. [2021-06-05 21:07:12,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10590 states, 10589 states have (on average 2.578808197185759) internal successors, (27307), 10589 states have internal predecessors, (27307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:12,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10590 states to 10590 states and 27307 transitions. [2021-06-05 21:07:12,940 INFO L78 Accepts]: Start accepts. Automaton has 10590 states and 27307 transitions. Word has length 53 [2021-06-05 21:07:12,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:07:12,940 INFO L482 AbstractCegarLoop]: Abstraction has 10590 states and 27307 transitions. [2021-06-05 21:07:12,940 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:12,940 INFO L276 IsEmpty]: Start isEmpty. Operand 10590 states and 27307 transitions. [2021-06-05 21:07:12,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 21:07:12,947 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:07:12,947 INFO L554 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:07:13,147 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 335 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable684 [2021-06-05 21:07:13,148 INFO L430 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:07:13,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:07:13,148 INFO L82 PathProgramCache]: Analyzing trace with hash 828715443, now seen corresponding path program 91 times [2021-06-05 21:07:13,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:07:13,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491992901] [2021-06-05 21:07:13,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:07:13,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:07:13,214 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 104 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:07:13,214 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:07:13,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491992901] [2021-06-05 21:07:13,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491992901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:13,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314520815] [2021-06-05 21:07:13,214 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:07:13,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:07:13,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:07:13,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:07:13,317 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 105 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:07:13,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314520815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:13,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:07:13,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 12 [2021-06-05 21:07:13,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945747089] [2021-06-05 21:07:13,318 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:07:13,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:07:13,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:07:13,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:07:13,318 INFO L87 Difference]: Start difference. First operand 10590 states and 27307 transitions. Second operand has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 12 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:13,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:07:13,665 INFO L93 Difference]: Finished difference Result 17337 states and 42262 transitions. [2021-06-05 21:07:13,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:07:13,666 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 12 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 21:07:13,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:07:13,684 INFO L225 Difference]: With dead ends: 17337 [2021-06-05 21:07:13,685 INFO L226 Difference]: Without dead ends: 17337 [2021-06-05 21:07:13,685 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 132.7ms TimeCoverageRelationStatistics Valid=184, Invalid=278, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:07:13,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17337 states. [2021-06-05 21:07:13,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17337 to 10630. [2021-06-05 21:07:13,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10630 states, 10629 states have (on average 2.5802991814846177) internal successors, (27426), 10629 states have internal predecessors, (27426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:13,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10630 states to 10630 states and 27426 transitions. [2021-06-05 21:07:13,856 INFO L78 Accepts]: Start accepts. Automaton has 10630 states and 27426 transitions. Word has length 53 [2021-06-05 21:07:13,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:07:13,856 INFO L482 AbstractCegarLoop]: Abstraction has 10630 states and 27426 transitions. [2021-06-05 21:07:13,856 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 12 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:13,856 INFO L276 IsEmpty]: Start isEmpty. Operand 10630 states and 27426 transitions. [2021-06-05 21:07:13,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 21:07:13,863 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:07:13,863 INFO L554 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:07:14,063 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable685,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:07:14,063 INFO L430 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:07:14,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:07:14,064 INFO L82 PathProgramCache]: Analyzing trace with hash -861279721, now seen corresponding path program 92 times [2021-06-05 21:07:14,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:07:14,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871236095] [2021-06-05 21:07:14,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:07:14,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:07:14,139 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 97 proven. 37 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:07:14,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:07:14,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871236095] [2021-06-05 21:07:14,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871236095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:14,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42334357] [2021-06-05 21:07:14,140 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:07:14,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:07:14,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:07:14,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:07:14,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:07:14,244 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 98 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:07:14,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42334357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:14,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:07:14,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-06-05 21:07:14,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891797603] [2021-06-05 21:07:14,245 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:07:14,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:07:14,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:07:14,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:07:14,245 INFO L87 Difference]: Start difference. First operand 10630 states and 27426 transitions. Second operand has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 13 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:14,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:07:14,633 INFO L93 Difference]: Finished difference Result 17209 states and 41987 transitions. [2021-06-05 21:07:14,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:07:14,634 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 13 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 21:07:14,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:07:14,653 INFO L225 Difference]: With dead ends: 17209 [2021-06-05 21:07:14,653 INFO L226 Difference]: Without dead ends: 17209 [2021-06-05 21:07:14,653 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 162.8ms TimeCoverageRelationStatistics Valid=233, Invalid=367, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:07:14,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17209 states. [2021-06-05 21:07:14,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17209 to 10659. [2021-06-05 21:07:14,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10659 states, 10658 states have (on average 2.581534997185213) internal successors, (27514), 10658 states have internal predecessors, (27514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:14,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10659 states to 10659 states and 27514 transitions. [2021-06-05 21:07:14,826 INFO L78 Accepts]: Start accepts. Automaton has 10659 states and 27514 transitions. Word has length 53 [2021-06-05 21:07:14,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:07:14,826 INFO L482 AbstractCegarLoop]: Abstraction has 10659 states and 27514 transitions. [2021-06-05 21:07:14,826 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 13 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:14,826 INFO L276 IsEmpty]: Start isEmpty. Operand 10659 states and 27514 transitions. [2021-06-05 21:07:14,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 21:07:14,833 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:07:14,833 INFO L554 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:07:15,034 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 337 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable686 [2021-06-05 21:07:15,034 INFO L430 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:07:15,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:07:15,034 INFO L82 PathProgramCache]: Analyzing trace with hash -1900566733, now seen corresponding path program 93 times [2021-06-05 21:07:15,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:07:15,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974632444] [2021-06-05 21:07:15,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:07:15,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:07:15,171 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 90 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:07:15,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:07:15,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974632444] [2021-06-05 21:07:15,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974632444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:15,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602227952] [2021-06-05 21:07:15,171 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 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:07:15,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-06-05 21:07:15,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:07:15,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:07:15,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:07:15,332 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 112 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:07:15,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602227952] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:15,333 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:07:15,333 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 18 [2021-06-05 21:07:15,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510140006] [2021-06-05 21:07:15,333 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:07:15,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:07:15,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:07:15,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=225, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:07:15,333 INFO L87 Difference]: Start difference. First operand 10659 states and 27514 transitions. Second operand has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 18 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:15,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:07:15,645 INFO L93 Difference]: Finished difference Result 12656 states and 31353 transitions. [2021-06-05 21:07:15,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:07:15,645 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 18 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 21:07:15,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:07:15,658 INFO L225 Difference]: With dead ends: 12656 [2021-06-05 21:07:15,658 INFO L226 Difference]: Without dead ends: 12656 [2021-06-05 21:07:15,659 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 226.7ms TimeCoverageRelationStatistics Valid=200, Invalid=352, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:07:15,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12656 states. [2021-06-05 21:07:15,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12656 to 10205. [2021-06-05 21:07:15,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10205 states, 10204 states have (on average 2.5751666013328105) internal successors, (26277), 10204 states have internal predecessors, (26277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:15,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10205 states to 10205 states and 26277 transitions. [2021-06-05 21:07:15,798 INFO L78 Accepts]: Start accepts. Automaton has 10205 states and 26277 transitions. Word has length 53 [2021-06-05 21:07:15,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:07:15,798 INFO L482 AbstractCegarLoop]: Abstraction has 10205 states and 26277 transitions. [2021-06-05 21:07:15,798 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 18 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:15,798 INFO L276 IsEmpty]: Start isEmpty. Operand 10205 states and 26277 transitions. [2021-06-05 21:07:15,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 21:07:15,805 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:07:15,805 INFO L554 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:07:16,005 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable687 [2021-06-05 21:07:16,005 INFO L430 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:07:16,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:07:16,005 INFO L82 PathProgramCache]: Analyzing trace with hash -219319817, now seen corresponding path program 195 times [2021-06-05 21:07:16,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:07:16,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076522153] [2021-06-05 21:07:16,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:07:16,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:07:16,097 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 49 proven. 86 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:07:16,098 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:07:16,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076522153] [2021-06-05 21:07:16,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076522153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:16,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952856021] [2021-06-05 21:07:16,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:07:16,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 21:07:16,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:07:16,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:07:16,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:07:16,201 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 49 proven. 86 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:07:16,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952856021] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:16,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:07:16,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-05 21:07:16,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590162565] [2021-06-05 21:07:16,201 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:07:16,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:07:16,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:07:16,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:07:16,202 INFO L87 Difference]: Start difference. First operand 10205 states and 26277 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:16,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:07:16,428 INFO L93 Difference]: Finished difference Result 11763 states and 29051 transitions. [2021-06-05 21:07:16,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:07:16,428 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 21:07:16,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:07:16,442 INFO L225 Difference]: With dead ends: 11763 [2021-06-05 21:07:16,442 INFO L226 Difference]: Without dead ends: 11718 [2021-06-05 21:07:16,442 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 132.8ms TimeCoverageRelationStatistics Valid=131, Invalid=289, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:07:16,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11718 states. [2021-06-05 21:07:16,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11718 to 10205. [2021-06-05 21:07:16,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10205 states, 10204 states have (on average 2.574284594276754) internal successors, (26268), 10204 states have internal predecessors, (26268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:16,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10205 states to 10205 states and 26268 transitions. [2021-06-05 21:07:16,578 INFO L78 Accepts]: Start accepts. Automaton has 10205 states and 26268 transitions. Word has length 53 [2021-06-05 21:07:16,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:07:16,578 INFO L482 AbstractCegarLoop]: Abstraction has 10205 states and 26268 transitions. [2021-06-05 21:07:16,578 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:16,578 INFO L276 IsEmpty]: Start isEmpty. Operand 10205 states and 26268 transitions. [2021-06-05 21:07:16,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 21:07:16,585 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:07:16,586 INFO L554 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:07:16,786 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable690,339 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:07:16,786 INFO L430 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:07:16,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:07:16,786 INFO L82 PathProgramCache]: Analyzing trace with hash 1122147283, now seen corresponding path program 196 times [2021-06-05 21:07:16,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:07:16,786 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555529904] [2021-06-05 21:07:16,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:07:16,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:07:16,840 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 43 proven. 88 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:07:16,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:07:16,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555529904] [2021-06-05 21:07:16,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555529904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:16,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988183685] [2021-06-05 21:07:16,840 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:07:16,866 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:07:16,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:07:16,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:07:16,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:07:16,943 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 43 proven. 88 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:07:16,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988183685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:16,943 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:07:16,944 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 21:07:16,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656807173] [2021-06-05 21:07:16,944 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:07:16,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:07:16,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:07:16,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:07:16,944 INFO L87 Difference]: Start difference. First operand 10205 states and 26268 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:17,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:07:17,092 INFO L93 Difference]: Finished difference Result 12506 states and 30816 transitions. [2021-06-05 21:07:17,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:07:17,093 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 21:07:17,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:07:17,107 INFO L225 Difference]: With dead ends: 12506 [2021-06-05 21:07:17,107 INFO L226 Difference]: Without dead ends: 12506 [2021-06-05 21:07:17,108 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 52.7ms TimeCoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:07:17,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12506 states. [2021-06-05 21:07:17,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12506 to 10409. [2021-06-05 21:07:17,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10409 states, 10408 states have (on average 2.5858954650269026) internal successors, (26914), 10408 states have internal predecessors, (26914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:17,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10409 states to 10409 states and 26914 transitions. [2021-06-05 21:07:17,254 INFO L78 Accepts]: Start accepts. Automaton has 10409 states and 26914 transitions. Word has length 53 [2021-06-05 21:07:17,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:07:17,254 INFO L482 AbstractCegarLoop]: Abstraction has 10409 states and 26914 transitions. [2021-06-05 21:07:17,254 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:17,254 INFO L276 IsEmpty]: Start isEmpty. Operand 10409 states and 26914 transitions. [2021-06-05 21:07:17,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 21:07:17,262 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:07:17,262 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:07:17,462 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 340 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable697 [2021-06-05 21:07:17,463 INFO L430 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:07:17,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:07:17,463 INFO L82 PathProgramCache]: Analyzing trace with hash 884085766, now seen corresponding path program 94 times [2021-06-05 21:07:17,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:07:17,463 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574194077] [2021-06-05 21:07:17,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:07:17,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:07:17,551 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 8 proven. 123 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:07:17,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:07:17,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574194077] [2021-06-05 21:07:17,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574194077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:17,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695358388] [2021-06-05 21:07:17,551 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:07:17,580 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:07:17,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:07:17,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 21:07:17,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:07:17,655 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 124 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:07:17,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695358388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:17,655 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:07:17,655 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 21:07:17,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771227272] [2021-06-05 21:07:17,655 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:07:17,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:07:17,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:07:17,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:07:17,656 INFO L87 Difference]: Start difference. First operand 10409 states and 26914 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:18,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:07:18,071 INFO L93 Difference]: Finished difference Result 11786 states and 29613 transitions. [2021-06-05 21:07:18,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:07:18,071 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 21:07:18,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:07:18,085 INFO L225 Difference]: With dead ends: 11786 [2021-06-05 21:07:18,085 INFO L226 Difference]: Without dead ends: 11771 [2021-06-05 21:07:18,085 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 127.4ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:07:18,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11771 states. [2021-06-05 21:07:18,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11771 to 10612. [2021-06-05 21:07:18,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10612 states, 10611 states have (on average 2.5817547827725944) internal successors, (27395), 10611 states have internal predecessors, (27395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:18,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10612 states to 10612 states and 27395 transitions. [2021-06-05 21:07:18,225 INFO L78 Accepts]: Start accepts. Automaton has 10612 states and 27395 transitions. Word has length 53 [2021-06-05 21:07:18,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:07:18,225 INFO L482 AbstractCegarLoop]: Abstraction has 10612 states and 27395 transitions. [2021-06-05 21:07:18,225 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:18,225 INFO L276 IsEmpty]: Start isEmpty. Operand 10612 states and 27395 transitions. [2021-06-05 21:07:18,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 21:07:18,232 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:07:18,232 INFO L554 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:07:18,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 341 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable698 [2021-06-05 21:07:18,433 INFO L430 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:07:18,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:07:18,433 INFO L82 PathProgramCache]: Analyzing trace with hash -669611091, now seen corresponding path program 197 times [2021-06-05 21:07:18,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:07:18,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681494434] [2021-06-05 21:07:18,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:07:18,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:07:18,486 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 58 proven. 74 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 21:07:18,486 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:07:18,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681494434] [2021-06-05 21:07:18,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681494434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:18,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926169909] [2021-06-05 21:07:18,486 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:07:18,514 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-06-05 21:07:18,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:07:18,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:07:18,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:07:18,609 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 61 proven. 74 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:07:18,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926169909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:18,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:07:18,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 12 [2021-06-05 21:07:18,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820829245] [2021-06-05 21:07:18,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:07:18,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:07:18,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:07:18,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:07:18,610 INFO L87 Difference]: Start difference. First operand 10612 states and 27395 transitions. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:18,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:07:18,819 INFO L93 Difference]: Finished difference Result 12612 states and 31047 transitions. [2021-06-05 21:07:18,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:07:18,819 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 21:07:18,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:07:18,832 INFO L225 Difference]: With dead ends: 12612 [2021-06-05 21:07:18,832 INFO L226 Difference]: Without dead ends: 12609 [2021-06-05 21:07:18,832 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 71.0ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:07:18,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12609 states. [2021-06-05 21:07:18,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12609 to 10610. [2021-06-05 21:07:18,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10610 states, 10609 states have (on average 2.5811103779809597) internal successors, (27383), 10609 states have internal predecessors, (27383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:18,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10610 states to 10610 states and 27383 transitions. [2021-06-05 21:07:18,969 INFO L78 Accepts]: Start accepts. Automaton has 10610 states and 27383 transitions. Word has length 53 [2021-06-05 21:07:18,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:07:18,969 INFO L482 AbstractCegarLoop]: Abstraction has 10610 states and 27383 transitions. [2021-06-05 21:07:18,969 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:18,969 INFO L276 IsEmpty]: Start isEmpty. Operand 10610 states and 27383 transitions. [2021-06-05 21:07:18,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 21:07:18,976 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:07:18,976 INFO L554 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:07:19,177 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable699,342 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:07:19,177 INFO L430 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:07:19,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:07:19,177 INFO L82 PathProgramCache]: Analyzing trace with hash -462548525, now seen corresponding path program 198 times [2021-06-05 21:07:19,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:07:19,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067658836] [2021-06-05 21:07:19,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:07:19,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:07:19,235 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 51 proven. 80 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:07:19,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:07:19,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067658836] [2021-06-05 21:07:19,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067658836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:19,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085111771] [2021-06-05 21:07:19,235 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:07:19,264 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-06-05 21:07:19,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:07:19,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:07:19,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:07:19,336 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 51 proven. 80 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:07:19,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085111771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:19,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:07:19,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 21:07:19,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978576047] [2021-06-05 21:07:19,336 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:07:19,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:07:19,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:07:19,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:07:19,337 INFO L87 Difference]: Start difference. First operand 10610 states and 27383 transitions. Second operand has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:19,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:07:19,503 INFO L93 Difference]: Finished difference Result 12493 states and 30763 transitions. [2021-06-05 21:07:19,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:07:19,503 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 21:07:19,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:07:19,519 INFO L225 Difference]: With dead ends: 12493 [2021-06-05 21:07:19,519 INFO L226 Difference]: Without dead ends: 12475 [2021-06-05 21:07:19,519 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 67.7ms TimeCoverageRelationStatistics Valid=74, Invalid=108, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:07:19,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12475 states. [2021-06-05 21:07:19,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12475 to 10610. [2021-06-05 21:07:19,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10610 states, 10609 states have (on average 2.578942407389952) internal successors, (27360), 10609 states have internal predecessors, (27360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:19,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10610 states to 10610 states and 27360 transitions. [2021-06-05 21:07:19,667 INFO L78 Accepts]: Start accepts. Automaton has 10610 states and 27360 transitions. Word has length 53 [2021-06-05 21:07:19,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:07:19,667 INFO L482 AbstractCegarLoop]: Abstraction has 10610 states and 27360 transitions. [2021-06-05 21:07:19,667 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:19,667 INFO L276 IsEmpty]: Start isEmpty. Operand 10610 states and 27360 transitions. [2021-06-05 21:07:19,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 21:07:19,674 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:07:19,674 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:07:19,874 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 343 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable701 [2021-06-05 21:07:19,875 INFO L430 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:07:19,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:07:19,875 INFO L82 PathProgramCache]: Analyzing trace with hash -1910548538, now seen corresponding path program 199 times [2021-06-05 21:07:19,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:07:19,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053399955] [2021-06-05 21:07:19,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:07:19,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:07:19,947 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 18 proven. 113 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:07:19,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:07:19,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053399955] [2021-06-05 21:07:19,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053399955] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:19,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999570503] [2021-06-05 21:07:19,948 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:07:19,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:07:19,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 21:07:19,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:07:20,059 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 118 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:07:20,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999570503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:20,059 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:07:20,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 21:07:20,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343689759] [2021-06-05 21:07:20,060 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:07:20,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:07:20,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:07:20,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:07:20,060 INFO L87 Difference]: Start difference. First operand 10610 states and 27360 transitions. Second operand has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:20,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:07:20,613 INFO L93 Difference]: Finished difference Result 11446 states and 28816 transitions. [2021-06-05 21:07:20,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:07:20,614 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 21:07:20,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:07:20,626 INFO L225 Difference]: With dead ends: 11446 [2021-06-05 21:07:20,626 INFO L226 Difference]: Without dead ends: 11336 [2021-06-05 21:07:20,626 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 121.1ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:07:20,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11336 states. [2021-06-05 21:07:20,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11336 to 10627. [2021-06-05 21:07:20,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10627 states, 10626 states have (on average 2.569734613212874) internal successors, (27306), 10626 states have internal predecessors, (27306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:20,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10627 states to 10627 states and 27306 transitions. [2021-06-05 21:07:20,764 INFO L78 Accepts]: Start accepts. Automaton has 10627 states and 27306 transitions. Word has length 53 [2021-06-05 21:07:20,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:07:20,764 INFO L482 AbstractCegarLoop]: Abstraction has 10627 states and 27306 transitions. [2021-06-05 21:07:20,764 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) [2021-06-05 21:07:20,764 INFO L276 IsEmpty]: Start isEmpty. Operand 10627 states and 27306 transitions. [2021-06-05 21:07:20,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 21:07:20,772 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:07:20,772 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:07:20,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable704,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:07:20,972 INFO L430 AbstractCegarLoop]: === Iteration 353 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:07:20,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:07:20,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1770882578, now seen corresponding path program 200 times [2021-06-05 21:07:20,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:07:20,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958418524] [2021-06-05 21:07:20,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:07:20,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:07:21,052 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 114 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:07:21,052 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:07:21,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958418524] [2021-06-05 21:07:21,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958418524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:21,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378246031] [2021-06-05 21:07:21,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:07:21,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:07:21,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:07:21,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 21:07:21,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:07:21,154 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 115 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:07:21,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378246031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:21,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:07:21,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 21:07:21,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484109171] [2021-06-05 21:07:21,154 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:07:21,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:07:21,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:07:21,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:07:21,155 INFO L87 Difference]: Start difference. First operand 10627 states and 27306 transitions. Second operand has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:21,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:07:21,562 INFO L93 Difference]: Finished difference Result 11964 states and 29958 transitions. [2021-06-05 21:07:21,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:07:21,562 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 21:07:21,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:07:21,575 INFO L225 Difference]: With dead ends: 11964 [2021-06-05 21:07:21,576 INFO L226 Difference]: Without dead ends: 11952 [2021-06-05 21:07:21,576 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 121.9ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:07:21,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11952 states. [2021-06-05 21:07:21,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11952 to 10745. [2021-06-05 21:07:21,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10745 states, 10744 states have (on average 2.5690618019359643) internal successors, (27602), 10744 states have internal predecessors, (27602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:21,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10745 states to 10745 states and 27602 transitions. [2021-06-05 21:07:21,727 INFO L78 Accepts]: Start accepts. Automaton has 10745 states and 27602 transitions. Word has length 53 [2021-06-05 21:07:21,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:07:21,727 INFO L482 AbstractCegarLoop]: Abstraction has 10745 states and 27602 transitions. [2021-06-05 21:07:21,727 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:21,727 INFO L276 IsEmpty]: Start isEmpty. Operand 10745 states and 27602 transitions. [2021-06-05 21:07:21,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 21:07:21,735 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:07:21,735 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:07:21,935 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable705 [2021-06-05 21:07:21,935 INFO L430 AbstractCegarLoop]: === Iteration 354 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:07:21,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:07:21,936 INFO L82 PathProgramCache]: Analyzing trace with hash -382167384, now seen corresponding path program 201 times [2021-06-05 21:07:21,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:07:21,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053509148] [2021-06-05 21:07:21,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:07:21,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:07:22,030 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 116 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:07:22,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:07:22,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053509148] [2021-06-05 21:07:22,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053509148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:22,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464652820] [2021-06-05 21:07:22,030 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:07:22,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-06-05 21:07:22,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:07:22,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 21:07:22,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:07:22,158 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 117 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:07:22,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464652820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:22,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:07:22,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 21:07:22,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347617214] [2021-06-05 21:07:22,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:07:22,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:07:22,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:07:22,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:07:22,158 INFO L87 Difference]: Start difference. First operand 10745 states and 27602 transitions. Second operand has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:22,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:07:22,827 INFO L93 Difference]: Finished difference Result 13743 states and 33934 transitions. [2021-06-05 21:07:22,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 21:07:22,827 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 21:07:22,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:07:22,842 INFO L225 Difference]: With dead ends: 13743 [2021-06-05 21:07:22,842 INFO L226 Difference]: Without dead ends: 13689 [2021-06-05 21:07:22,842 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 235.2ms TimeCoverageRelationStatistics Valid=111, Invalid=701, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:07:22,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13689 states. [2021-06-05 21:07:22,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13689 to 11094. [2021-06-05 21:07:22,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11094 states, 11093 states have (on average 2.5733345352925268) internal successors, (28546), 11093 states have internal predecessors, (28546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:22,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11094 states to 11094 states and 28546 transitions. [2021-06-05 21:07:22,995 INFO L78 Accepts]: Start accepts. Automaton has 11094 states and 28546 transitions. Word has length 53 [2021-06-05 21:07:22,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:07:22,995 INFO L482 AbstractCegarLoop]: Abstraction has 11094 states and 28546 transitions. [2021-06-05 21:07:22,995 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:22,995 INFO L276 IsEmpty]: Start isEmpty. Operand 11094 states and 28546 transitions. [2021-06-05 21:07:23,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 21:07:23,002 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:07:23,002 INFO L554 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:07:23,203 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable706,346 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:07:23,203 INFO L430 AbstractCegarLoop]: === Iteration 355 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:07:23,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:07:23,203 INFO L82 PathProgramCache]: Analyzing trace with hash 1150391725, now seen corresponding path program 202 times [2021-06-05 21:07:23,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:07:23,203 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505065550] [2021-06-05 21:07:23,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:07:23,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:07:23,269 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 40 proven. 94 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:07:23,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:07:23,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505065550] [2021-06-05 21:07:23,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505065550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:23,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315987512] [2021-06-05 21:07:23,270 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:07:23,295 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:07:23,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:07:23,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:07:23,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:07:23,368 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 40 proven. 94 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:07:23,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315987512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:23,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:07:23,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 21:07:23,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45476274] [2021-06-05 21:07:23,368 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:07:23,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:07:23,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:07:23,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:07:23,369 INFO L87 Difference]: Start difference. First operand 11094 states and 28546 transitions. Second operand has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:23,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:07:23,539 INFO L93 Difference]: Finished difference Result 13092 states and 32135 transitions. [2021-06-05 21:07:23,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:07:23,539 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 21:07:23,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:07:23,554 INFO L225 Difference]: With dead ends: 13092 [2021-06-05 21:07:23,554 INFO L226 Difference]: Without dead ends: 13068 [2021-06-05 21:07:23,554 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 76.9ms TimeCoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:07:23,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13068 states. [2021-06-05 21:07:23,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13068 to 11094. [2021-06-05 21:07:23,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11094 states, 11093 states have (on average 2.571802037320833) internal successors, (28529), 11093 states have internal predecessors, (28529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:23,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11094 states to 11094 states and 28529 transitions. [2021-06-05 21:07:23,700 INFO L78 Accepts]: Start accepts. Automaton has 11094 states and 28529 transitions. Word has length 53 [2021-06-05 21:07:23,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:07:23,700 INFO L482 AbstractCegarLoop]: Abstraction has 11094 states and 28529 transitions. [2021-06-05 21:07:23,700 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:23,701 INFO L276 IsEmpty]: Start isEmpty. Operand 11094 states and 28529 transitions. [2021-06-05 21:07:23,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 21:07:23,709 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:07:23,709 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:07:23,909 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable707,347 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:07:23,910 INFO L430 AbstractCegarLoop]: === Iteration 356 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:07:23,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:07:23,910 INFO L82 PathProgramCache]: Analyzing trace with hash -227330850, now seen corresponding path program 203 times [2021-06-05 21:07:23,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:07:23,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614548691] [2021-06-05 21:07:23,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:07:23,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:07:24,000 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 116 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:07:24,000 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:07:24,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614548691] [2021-06-05 21:07:24,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614548691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:24,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585788256] [2021-06-05 21:07:24,000 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:07:24,035 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-06-05 21:07:24,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:07:24,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 21:07:24,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:07:24,110 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 117 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:07:24,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585788256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:24,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:07:24,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:07:24,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505791394] [2021-06-05 21:07:24,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:07:24,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:07:24,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:07:24,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:07:24,110 INFO L87 Difference]: Start difference. First operand 11094 states and 28529 transitions. Second operand has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:25,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:07:25,064 INFO L93 Difference]: Finished difference Result 17716 states and 42908 transitions. [2021-06-05 21:07:25,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 21:07:25,064 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 21:07:25,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:07:25,082 INFO L225 Difference]: With dead ends: 17716 [2021-06-05 21:07:25,082 INFO L226 Difference]: Without dead ends: 17548 [2021-06-05 21:07:25,082 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 429.7ms TimeCoverageRelationStatistics Valid=273, Invalid=2079, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 21:07:25,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17548 states. [2021-06-05 21:07:25,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17548 to 11789. [2021-06-05 21:07:25,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11789 states, 11788 states have (on average 2.574737020699016) internal successors, (30351), 11788 states have internal predecessors, (30351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:25,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11789 states to 11789 states and 30351 transitions. [2021-06-05 21:07:25,270 INFO L78 Accepts]: Start accepts. Automaton has 11789 states and 30351 transitions. Word has length 53 [2021-06-05 21:07:25,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:07:25,270 INFO L482 AbstractCegarLoop]: Abstraction has 11789 states and 30351 transitions. [2021-06-05 21:07:25,270 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:25,270 INFO L276 IsEmpty]: Start isEmpty. Operand 11789 states and 30351 transitions. [2021-06-05 21:07:25,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 21:07:25,277 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:07:25,277 INFO L554 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:07:25,478 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable711,348 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:07:25,478 INFO L430 AbstractCegarLoop]: === Iteration 357 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:07:25,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:07:25,478 INFO L82 PathProgramCache]: Analyzing trace with hash 159271827, now seen corresponding path program 204 times [2021-06-05 21:07:25,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:07:25,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101117980] [2021-06-05 21:07:25,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:07:25,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:07:25,553 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 35 proven. 99 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:07:25,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:07:25,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101117980] [2021-06-05 21:07:25,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101117980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:25,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657720080] [2021-06-05 21:07:25,553 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:07:25,583 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-05 21:07:25,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:07:25,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:07:25,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:07:25,656 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 35 proven. 99 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:07:25,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657720080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:25,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:07:25,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-05 21:07:25,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203685211] [2021-06-05 21:07:25,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:07:25,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:07:25,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:07:25,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:07:25,657 INFO L87 Difference]: Start difference. First operand 11789 states and 30351 transitions. Second operand has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:25,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:07:25,859 INFO L93 Difference]: Finished difference Result 13934 states and 34216 transitions. [2021-06-05 21:07:25,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:07:25,860 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 21:07:25,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:07:25,875 INFO L225 Difference]: With dead ends: 13934 [2021-06-05 21:07:25,876 INFO L226 Difference]: Without dead ends: 13901 [2021-06-05 21:07:25,876 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 94.7ms TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:07:25,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13901 states. [2021-06-05 21:07:26,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13901 to 11789. [2021-06-05 21:07:26,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11789 states, 11788 states have (on average 2.5739735324058364) internal successors, (30342), 11788 states have internal predecessors, (30342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:26,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11789 states to 11789 states and 30342 transitions. [2021-06-05 21:07:26,037 INFO L78 Accepts]: Start accepts. Automaton has 11789 states and 30342 transitions. Word has length 53 [2021-06-05 21:07:26,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:07:26,037 INFO L482 AbstractCegarLoop]: Abstraction has 11789 states and 30342 transitions. [2021-06-05 21:07:26,037 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:26,037 INFO L276 IsEmpty]: Start isEmpty. Operand 11789 states and 30342 transitions. [2021-06-05 21:07:26,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 21:07:26,101 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:07:26,101 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:07:26,301 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable712,349 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:07:26,302 INFO L430 AbstractCegarLoop]: === Iteration 358 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:07:26,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:07:26,302 INFO L82 PathProgramCache]: Analyzing trace with hash -287022360, now seen corresponding path program 205 times [2021-06-05 21:07:26,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:07:26,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097275930] [2021-06-05 21:07:26,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:07:26,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:07:26,397 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 116 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:07:26,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:07:26,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097275930] [2021-06-05 21:07:26,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097275930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:26,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511966405] [2021-06-05 21:07:26,398 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:07:26,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:07:26,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 21:07:26,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:07:26,497 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 117 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:07:26,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511966405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:26,497 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:07:26,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 21:07:26,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855069058] [2021-06-05 21:07:26,497 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:07:26,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:07:26,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:07:26,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:07:26,498 INFO L87 Difference]: Start difference. First operand 11789 states and 30342 transitions. Second operand has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:27,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:07:27,935 INFO L93 Difference]: Finished difference Result 26526 states and 62830 transitions. [2021-06-05 21:07:27,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-06-05 21:07:27,935 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 21:07:27,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:07:27,965 INFO L225 Difference]: With dead ends: 26526 [2021-06-05 21:07:27,965 INFO L226 Difference]: Without dead ends: 26004 [2021-06-05 21:07:27,966 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2275 ImplicationChecksByTransitivity, 826.9ms TimeCoverageRelationStatistics Valid=651, Invalid=5829, Unknown=0, NotChecked=0, Total=6480 [2021-06-05 21:07:27,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26004 states. [2021-06-05 21:07:28,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26004 to 12945. [2021-06-05 21:07:28,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12945 states, 12944 states have (on average 2.575324474660074) internal successors, (33335), 12944 states have internal predecessors, (33335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:28,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12945 states to 12945 states and 33335 transitions. [2021-06-05 21:07:28,217 INFO L78 Accepts]: Start accepts. Automaton has 12945 states and 33335 transitions. Word has length 53 [2021-06-05 21:07:28,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:07:28,217 INFO L482 AbstractCegarLoop]: Abstraction has 12945 states and 33335 transitions. [2021-06-05 21:07:28,217 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:28,217 INFO L276 IsEmpty]: Start isEmpty. Operand 12945 states and 33335 transitions. [2021-06-05 21:07:28,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 21:07:28,225 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:07:28,225 INFO L554 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:07:28,425 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable717,350 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:07:28,425 INFO L430 AbstractCegarLoop]: === Iteration 359 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:07:28,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:07:28,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1606550509, now seen corresponding path program 206 times [2021-06-05 21:07:28,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:07:28,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877513625] [2021-06-05 21:07:28,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:07:28,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:07:28,510 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 36 proven. 98 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:07:28,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:07:28,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877513625] [2021-06-05 21:07:28,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877513625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:28,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234852925] [2021-06-05 21:07:28,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:07:28,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:07:28,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:07:28,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:07:28,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:07:28,611 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 36 proven. 98 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:07:28,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234852925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:28,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:07:28,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-06-05 21:07:28,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955909340] [2021-06-05 21:07:28,611 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:07:28,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:07:28,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:07:28,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:07:28,612 INFO L87 Difference]: Start difference. First operand 12945 states and 33335 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:28,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:07:28,863 INFO L93 Difference]: Finished difference Result 15322 states and 37639 transitions. [2021-06-05 21:07:28,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:07:28,864 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 21:07:28,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:07:28,879 INFO L225 Difference]: With dead ends: 15322 [2021-06-05 21:07:28,880 INFO L226 Difference]: Without dead ends: 15280 [2021-06-05 21:07:28,880 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 114.1ms TimeCoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:07:28,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15280 states. [2021-06-05 21:07:29,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15280 to 12945. [2021-06-05 21:07:29,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12945 states, 12944 states have (on average 2.574629171817058) internal successors, (33326), 12944 states have internal predecessors, (33326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:29,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12945 states to 12945 states and 33326 transitions. [2021-06-05 21:07:29,068 INFO L78 Accepts]: Start accepts. Automaton has 12945 states and 33326 transitions. Word has length 53 [2021-06-05 21:07:29,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:07:29,068 INFO L482 AbstractCegarLoop]: Abstraction has 12945 states and 33326 transitions. [2021-06-05 21:07:29,068 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:29,068 INFO L276 IsEmpty]: Start isEmpty. Operand 12945 states and 33326 transitions. [2021-06-05 21:07:29,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 21:07:29,076 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:07:29,076 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:07:29,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable718,351 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:07:29,276 INFO L430 AbstractCegarLoop]: === Iteration 360 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:07:29,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:07:29,276 INFO L82 PathProgramCache]: Analyzing trace with hash -440336226, now seen corresponding path program 207 times [2021-06-05 21:07:29,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:07:29,276 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195828985] [2021-06-05 21:07:29,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:07:29,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:07:29,384 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 116 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:07:29,384 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:07:29,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195828985] [2021-06-05 21:07:29,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195828985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:29,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908788421] [2021-06-05 21:07:29,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:07:29,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-06-05 21:07:29,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:07:29,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 21:07:29,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:07:29,487 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 117 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:07:29,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908788421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:29,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:07:29,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:07:29,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420049650] [2021-06-05 21:07:29,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:07:29,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:07:29,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:07:29,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:07:29,488 INFO L87 Difference]: Start difference. First operand 12945 states and 33326 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:31,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:07:31,734 INFO L93 Difference]: Finished difference Result 33896 states and 80215 transitions. [2021-06-05 21:07:31,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2021-06-05 21:07:31,735 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 21:07:31,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:07:31,773 INFO L225 Difference]: With dead ends: 33896 [2021-06-05 21:07:31,774 INFO L226 Difference]: Without dead ends: 33278 [2021-06-05 21:07:31,775 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6564 ImplicationChecksByTransitivity, 1567.7ms TimeCoverageRelationStatistics Valid=1461, Invalid=15051, Unknown=0, NotChecked=0, Total=16512 [2021-06-05 21:07:31,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33278 states. [2021-06-05 21:07:32,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33278 to 13864. [2021-06-05 21:07:32,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13864 states, 13863 states have (on average 2.5749116352881773) internal successors, (35696), 13863 states have internal predecessors, (35696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:32,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13864 states to 13864 states and 35696 transitions. [2021-06-05 21:07:32,073 INFO L78 Accepts]: Start accepts. Automaton has 13864 states and 35696 transitions. Word has length 53 [2021-06-05 21:07:32,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:07:32,073 INFO L482 AbstractCegarLoop]: Abstraction has 13864 states and 35696 transitions. [2021-06-05 21:07:32,073 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:32,073 INFO L276 IsEmpty]: Start isEmpty. Operand 13864 states and 35696 transitions. [2021-06-05 21:07:32,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 21:07:32,081 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:07:32,081 INFO L554 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:07:32,281 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable724,352 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:07:32,282 INFO L430 AbstractCegarLoop]: === Iteration 361 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:07:32,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:07:32,282 INFO L82 PathProgramCache]: Analyzing trace with hash 309081427, now seen corresponding path program 208 times [2021-06-05 21:07:32,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:07:32,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254933099] [2021-06-05 21:07:32,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:07:32,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:07:32,377 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 43 proven. 91 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:07:32,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:07:32,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254933099] [2021-06-05 21:07:32,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254933099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:32,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892188896] [2021-06-05 21:07:32,378 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:07:32,403 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:07:32,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:07:32,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:07:32,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:07:32,480 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 43 proven. 91 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:07:32,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892188896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:32,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:07:32,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-05 21:07:32,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888732934] [2021-06-05 21:07:32,484 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:07:32,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:07:32,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:07:32,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:07:32,485 INFO L87 Difference]: Start difference. First operand 13864 states and 35696 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:32,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:07:32,735 INFO L93 Difference]: Finished difference Result 16347 states and 40212 transitions. [2021-06-05 21:07:32,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:07:32,735 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 21:07:32,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:07:32,751 INFO L225 Difference]: With dead ends: 16347 [2021-06-05 21:07:32,752 INFO L226 Difference]: Without dead ends: 16296 [2021-06-05 21:07:32,752 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 135.3ms TimeCoverageRelationStatistics Valid=137, Invalid=283, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:07:32,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16296 states. [2021-06-05 21:07:32,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16296 to 13554. [2021-06-05 21:07:32,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13554 states, 13553 states have (on average 2.570353427285472) internal successors, (34836), 13553 states have internal predecessors, (34836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:32,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13554 states to 13554 states and 34836 transitions. [2021-06-05 21:07:32,950 INFO L78 Accepts]: Start accepts. Automaton has 13554 states and 34836 transitions. Word has length 53 [2021-06-05 21:07:32,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:07:32,950 INFO L482 AbstractCegarLoop]: Abstraction has 13554 states and 34836 transitions. [2021-06-05 21:07:32,951 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:32,951 INFO L276 IsEmpty]: Start isEmpty. Operand 13554 states and 34836 transitions. [2021-06-05 21:07:32,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 21:07:32,961 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:07:32,961 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:07:33,163 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable725,353 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:07:33,163 INFO L430 AbstractCegarLoop]: === Iteration 362 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:07:33,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:07:33,163 INFO L82 PathProgramCache]: Analyzing trace with hash 2031484712, now seen corresponding path program 209 times [2021-06-05 21:07:33,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:07:33,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358454919] [2021-06-05 21:07:33,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:07:33,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:07:33,280 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 119 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:07:33,280 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:07:33,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358454919] [2021-06-05 21:07:33,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358454919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:33,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573347980] [2021-06-05 21:07:33,281 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:07:33,310 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-06-05 21:07:33,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:07:33,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 21:07:33,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:07:33,386 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 119 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:07:33,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573347980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:33,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:07:33,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 21:07:33,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221159180] [2021-06-05 21:07:33,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:07:33,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:07:33,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:07:33,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:07:33,387 INFO L87 Difference]: Start difference. First operand 13554 states and 34836 transitions. Second operand has 16 states, 16 states have (on average 3.375) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:34,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:07:34,168 INFO L93 Difference]: Finished difference Result 18422 states and 44497 transitions. [2021-06-05 21:07:34,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:07:34,168 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 21:07:34,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:07:34,186 INFO L225 Difference]: With dead ends: 18422 [2021-06-05 21:07:34,186 INFO L226 Difference]: Without dead ends: 17582 [2021-06-05 21:07:34,186 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 324.2ms TimeCoverageRelationStatistics Valid=175, Invalid=881, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 21:07:34,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17582 states. [2021-06-05 21:07:34,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17582 to 10239. [2021-06-05 21:07:34,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10239 states, 10238 states have (on average 2.551279546786482) internal successors, (26120), 10238 states have internal predecessors, (26120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:34,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10239 states to 10239 states and 26120 transitions. [2021-06-05 21:07:34,346 INFO L78 Accepts]: Start accepts. Automaton has 10239 states and 26120 transitions. Word has length 53 [2021-06-05 21:07:34,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:07:34,347 INFO L482 AbstractCegarLoop]: Abstraction has 10239 states and 26120 transitions. [2021-06-05 21:07:34,347 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:34,347 INFO L276 IsEmpty]: Start isEmpty. Operand 10239 states and 26120 transitions. [2021-06-05 21:07:34,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 21:07:34,354 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:07:34,354 INFO L554 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:07:34,555 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable732,354 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:07:34,555 INFO L430 AbstractCegarLoop]: === Iteration 363 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:07:34,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:07:34,555 INFO L82 PathProgramCache]: Analyzing trace with hash 1793423195, now seen corresponding path program 95 times [2021-06-05 21:07:34,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:07:34,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311468407] [2021-06-05 21:07:34,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:07:34,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:07:34,629 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 100 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:07:34,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:07:34,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311468407] [2021-06-05 21:07:34,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311468407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:34,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743245593] [2021-06-05 21:07:34,629 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:07:34,668 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-06-05 21:07:34,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:07:34,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:07:34,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:07:34,804 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 100 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:07:34,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743245593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:34,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:07:34,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 18 [2021-06-05 21:07:34,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361313857] [2021-06-05 21:07:34,804 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:07:34,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:07:34,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:07:34,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:07:34,805 INFO L87 Difference]: Start difference. First operand 10239 states and 26120 transitions. Second operand has 19 states, 19 states have (on average 4.315789473684211) internal successors, (82), 18 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:35,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:07:35,093 INFO L93 Difference]: Finished difference Result 12499 states and 30979 transitions. [2021-06-05 21:07:35,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:07:35,093 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.315789473684211) internal successors, (82), 18 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 21:07:35,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:07:35,106 INFO L225 Difference]: With dead ends: 12499 [2021-06-05 21:07:35,107 INFO L226 Difference]: Without dead ends: 12485 [2021-06-05 21:07:35,107 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 127.8ms TimeCoverageRelationStatistics Valid=148, Invalid=272, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:07:35,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12485 states. [2021-06-05 21:07:35,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12485 to 10638. [2021-06-05 21:07:35,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10638 states, 10637 states have (on average 2.5578640594152486) internal successors, (27208), 10637 states have internal predecessors, (27208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:35,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10638 states to 10638 states and 27208 transitions. [2021-06-05 21:07:35,245 INFO L78 Accepts]: Start accepts. Automaton has 10638 states and 27208 transitions. Word has length 53 [2021-06-05 21:07:35,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:07:35,245 INFO L482 AbstractCegarLoop]: Abstraction has 10638 states and 27208 transitions. [2021-06-05 21:07:35,245 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.315789473684211) internal successors, (82), 18 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:35,245 INFO L276 IsEmpty]: Start isEmpty. Operand 10638 states and 27208 transitions. [2021-06-05 21:07:35,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 21:07:35,253 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:07:35,253 INFO L554 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:07:35,453 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 355 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable733 [2021-06-05 21:07:35,453 INFO L430 AbstractCegarLoop]: === Iteration 364 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:07:35,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:07:35,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1171542785, now seen corresponding path program 96 times [2021-06-05 21:07:35,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:07:35,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090463035] [2021-06-05 21:07:35,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:07:35,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:07:35,518 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 100 proven. 34 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:07:35,518 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:07:35,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090463035] [2021-06-05 21:07:35,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090463035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:35,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206550911] [2021-06-05 21:07:35,518 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:07:35,547 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-06-05 21:07:35,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:07:35,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:07:35,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:07:35,627 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 101 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:07:35,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206550911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:35,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:07:35,628 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 11 [2021-06-05 21:07:35,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614467775] [2021-06-05 21:07:35,628 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:07:35,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:07:35,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:07:35,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:07:35,628 INFO L87 Difference]: Start difference. First operand 10638 states and 27208 transitions. Second operand has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:35,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:07:35,929 INFO L93 Difference]: Finished difference Result 14368 states and 35164 transitions. [2021-06-05 21:07:35,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:07:35,929 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 21:07:35,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:07:35,945 INFO L225 Difference]: With dead ends: 14368 [2021-06-05 21:07:35,945 INFO L226 Difference]: Without dead ends: 14368 [2021-06-05 21:07:35,946 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 104.8ms TimeCoverageRelationStatistics Valid=128, Invalid=178, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:07:35,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14368 states. [2021-06-05 21:07:36,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14368 to 10646. [2021-06-05 21:07:36,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10646 states, 10645 states have (on average 2.558290277125411) internal successors, (27233), 10645 states have internal predecessors, (27233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:36,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10646 states to 10646 states and 27233 transitions. [2021-06-05 21:07:36,100 INFO L78 Accepts]: Start accepts. Automaton has 10646 states and 27233 transitions. Word has length 53 [2021-06-05 21:07:36,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:07:36,101 INFO L482 AbstractCegarLoop]: Abstraction has 10646 states and 27233 transitions. [2021-06-05 21:07:36,101 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:36,101 INFO L276 IsEmpty]: Start isEmpty. Operand 10646 states and 27233 transitions. [2021-06-05 21:07:36,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 21:07:36,108 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:07:36,108 INFO L554 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:07:36,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable735,356 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:07:36,309 INFO L430 AbstractCegarLoop]: === Iteration 365 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:07:36,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:07:36,309 INFO L82 PathProgramCache]: Analyzing trace with hash -466029671, now seen corresponding path program 97 times [2021-06-05 21:07:36,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:07:36,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992984297] [2021-06-05 21:07:36,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:07:36,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:07:36,379 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 100 proven. 34 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:07:36,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:07:36,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992984297] [2021-06-05 21:07:36,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992984297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:36,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22063488] [2021-06-05 21:07:36,380 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:07:36,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:07:36,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:07:36,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:07:36,485 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 101 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:07:36,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22063488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:36,485 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:07:36,485 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 12 [2021-06-05 21:07:36,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107295663] [2021-06-05 21:07:36,485 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:07:36,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:07:36,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:07:36,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:07:36,485 INFO L87 Difference]: Start difference. First operand 10646 states and 27233 transitions. Second operand has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 12 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:36,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:07:36,867 INFO L93 Difference]: Finished difference Result 15753 states and 38328 transitions. [2021-06-05 21:07:36,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:07:36,868 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 12 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 21:07:36,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:07:36,886 INFO L225 Difference]: With dead ends: 15753 [2021-06-05 21:07:36,887 INFO L226 Difference]: Without dead ends: 15753 [2021-06-05 21:07:36,887 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 153.9ms TimeCoverageRelationStatistics Valid=216, Invalid=336, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:07:36,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15753 states. [2021-06-05 21:07:37,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15753 to 10665. [2021-06-05 21:07:37,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10665 states, 10664 states have (on average 2.559358589647412) internal successors, (27293), 10664 states have internal predecessors, (27293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:37,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10665 states to 10665 states and 27293 transitions. [2021-06-05 21:07:37,055 INFO L78 Accepts]: Start accepts. Automaton has 10665 states and 27293 transitions. Word has length 53 [2021-06-05 21:07:37,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:07:37,055 INFO L482 AbstractCegarLoop]: Abstraction has 10665 states and 27293 transitions. [2021-06-05 21:07:37,055 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 12 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:37,055 INFO L276 IsEmpty]: Start isEmpty. Operand 10665 states and 27293 transitions. [2021-06-05 21:07:37,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 21:07:37,063 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:07:37,063 INFO L554 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:07:37,263 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 357 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable736 [2021-06-05 21:07:37,263 INFO L430 AbstractCegarLoop]: === Iteration 366 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:07:37,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:07:37,263 INFO L82 PathProgramCache]: Analyzing trace with hash 2138942461, now seen corresponding path program 98 times [2021-06-05 21:07:37,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:07:37,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981724647] [2021-06-05 21:07:37,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:07:37,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:07:37,343 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 96 proven. 38 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:07:37,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:07:37,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981724647] [2021-06-05 21:07:37,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981724647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:37,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418313655] [2021-06-05 21:07:37,343 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:07:37,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:07:37,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:07:37,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:07:37,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:07:37,452 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 97 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:07:37,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418313655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:37,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:07:37,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-06-05 21:07:37,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117638906] [2021-06-05 21:07:37,453 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:07:37,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:07:37,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:07:37,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:07:37,454 INFO L87 Difference]: Start difference. First operand 10665 states and 27293 transitions. Second operand has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 13 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:37,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:07:37,862 INFO L93 Difference]: Finished difference Result 16162 states and 39295 transitions. [2021-06-05 21:07:37,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:07:37,862 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 13 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 21:07:37,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:07:37,880 INFO L225 Difference]: With dead ends: 16162 [2021-06-05 21:07:37,880 INFO L226 Difference]: Without dead ends: 16162 [2021-06-05 21:07:37,880 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 221.1ms TimeCoverageRelationStatistics Valid=289, Invalid=467, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:07:37,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16162 states. [2021-06-05 21:07:38,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16162 to 10690. [2021-06-05 21:07:38,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10690 states, 10689 states have (on average 2.560669847506783) internal successors, (27371), 10689 states have internal predecessors, (27371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:38,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10690 states to 10690 states and 27371 transitions. [2021-06-05 21:07:38,044 INFO L78 Accepts]: Start accepts. Automaton has 10690 states and 27371 transitions. Word has length 53 [2021-06-05 21:07:38,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:07:38,044 INFO L482 AbstractCegarLoop]: Abstraction has 10690 states and 27371 transitions. [2021-06-05 21:07:38,044 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 13 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:38,044 INFO L276 IsEmpty]: Start isEmpty. Operand 10690 states and 27371 transitions. [2021-06-05 21:07:38,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 21:07:38,051 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:07:38,051 INFO L554 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:07:38,251 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable737,358 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:07:38,251 INFO L430 AbstractCegarLoop]: === Iteration 367 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:07:38,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:07:38,251 INFO L82 PathProgramCache]: Analyzing trace with hash 1099655449, now seen corresponding path program 99 times [2021-06-05 21:07:38,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:07:38,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912848312] [2021-06-05 21:07:38,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:07:38,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:07:38,341 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 92 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:07:38,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:07:38,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912848312] [2021-06-05 21:07:38,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912848312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:38,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756970386] [2021-06-05 21:07:38,341 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 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:07:38,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-06-05 21:07:38,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:07:38,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:07:38,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:07:38,515 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 106 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:07:38,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756970386] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:38,515 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:07:38,515 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 18 [2021-06-05 21:07:38,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632633005] [2021-06-05 21:07:38,515 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:07:38,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:07:38,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:07:38,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=228, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:07:38,515 INFO L87 Difference]: Start difference. First operand 10690 states and 27371 transitions. Second operand has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 18 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:38,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:07:38,909 INFO L93 Difference]: Finished difference Result 12484 states and 30934 transitions. [2021-06-05 21:07:38,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:07:38,909 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 18 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 21:07:38,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:07:38,924 INFO L225 Difference]: With dead ends: 12484 [2021-06-05 21:07:38,924 INFO L226 Difference]: Without dead ends: 12484 [2021-06-05 21:07:38,924 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 234.1ms TimeCoverageRelationStatistics Valid=296, Invalid=516, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:07:38,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12484 states. [2021-06-05 21:07:39,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12484 to 10077. [2021-06-05 21:07:39,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10077 states, 10076 states have (on average 2.5562723302897976) internal successors, (25757), 10076 states have internal predecessors, (25757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:39,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10077 states to 10077 states and 25757 transitions. [2021-06-05 21:07:39,055 INFO L78 Accepts]: Start accepts. Automaton has 10077 states and 25757 transitions. Word has length 53 [2021-06-05 21:07:39,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:07:39,055 INFO L482 AbstractCegarLoop]: Abstraction has 10077 states and 25757 transitions. [2021-06-05 21:07:39,055 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 18 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:39,055 INFO L276 IsEmpty]: Start isEmpty. Operand 10077 states and 25757 transitions. [2021-06-05 21:07:39,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 21:07:39,062 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:07:39,062 INFO L554 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:07:39,262 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 359 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable738 [2021-06-05 21:07:39,262 INFO L430 AbstractCegarLoop]: === Iteration 368 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:07:39,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:07:39,263 INFO L82 PathProgramCache]: Analyzing trace with hash 2113323565, now seen corresponding path program 210 times [2021-06-05 21:07:39,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:07:39,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793937898] [2021-06-05 21:07:39,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:07:39,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:07:39,369 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 57 proven. 78 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:07:39,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:07:39,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793937898] [2021-06-05 21:07:39,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793937898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:39,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517736829] [2021-06-05 21:07:39,370 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:07:39,397 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 21:07:39,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:07:39,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:07:39,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:07:39,474 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 57 proven. 78 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:07:39,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517736829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:39,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:07:39,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-06-05 21:07:39,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895880665] [2021-06-05 21:07:39,474 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:07:39,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:07:39,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:07:39,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:07:39,475 INFO L87 Difference]: Start difference. First operand 10077 states and 25757 transitions. Second operand has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:39,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:07:39,762 INFO L93 Difference]: Finished difference Result 11675 states and 28615 transitions. [2021-06-05 21:07:39,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:07:39,763 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 21:07:39,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:07:39,775 INFO L225 Difference]: With dead ends: 11675 [2021-06-05 21:07:39,775 INFO L226 Difference]: Without dead ends: 11621 [2021-06-05 21:07:39,775 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 158.2ms TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:07:39,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11621 states. [2021-06-05 21:07:39,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11621 to 10086. [2021-06-05 21:07:39,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10086 states, 10085 states have (on average 2.5548834903321764) internal successors, (25766), 10085 states have internal predecessors, (25766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:39,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10086 states to 10086 states and 25766 transitions. [2021-06-05 21:07:39,908 INFO L78 Accepts]: Start accepts. Automaton has 10086 states and 25766 transitions. Word has length 53 [2021-06-05 21:07:39,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:07:39,908 INFO L482 AbstractCegarLoop]: Abstraction has 10086 states and 25766 transitions. [2021-06-05 21:07:39,908 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:39,908 INFO L276 IsEmpty]: Start isEmpty. Operand 10086 states and 25766 transitions. [2021-06-05 21:07:39,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 21:07:39,915 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:07:39,915 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:07:40,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable741,360 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:07:40,116 INFO L430 AbstractCegarLoop]: === Iteration 369 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:07:40,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:07:40,116 INFO L82 PathProgramCache]: Analyzing trace with hash 1980297346, now seen corresponding path program 100 times [2021-06-05 21:07:40,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:07:40,116 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834949393] [2021-06-05 21:07:40,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:07:40,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:07:40,237 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 125 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:07:40,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:07:40,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834949393] [2021-06-05 21:07:40,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834949393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:40,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917602111] [2021-06-05 21:07:40,237 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:07:40,262 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:07:40,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:07:40,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 21:07:40,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:07:40,335 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 125 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:07:40,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917602111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:40,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:07:40,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 21:07:40,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809674127] [2021-06-05 21:07:40,335 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:07:40,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:07:40,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:07:40,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:07:40,336 INFO L87 Difference]: Start difference. First operand 10086 states and 25766 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:40,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:07:40,919 INFO L93 Difference]: Finished difference Result 14226 states and 34514 transitions. [2021-06-05 21:07:40,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:07:40,919 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 21:07:40,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:07:40,932 INFO L225 Difference]: With dead ends: 14226 [2021-06-05 21:07:40,932 INFO L226 Difference]: Without dead ends: 13952 [2021-06-05 21:07:40,933 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 321.9ms TimeCoverageRelationStatistics Valid=175, Invalid=881, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 21:07:40,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13952 states. [2021-06-05 21:07:41,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13952 to 9958. [2021-06-05 21:07:41,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9958 states, 9957 states have (on average 2.552475645274681) internal successors, (25415), 9957 states have internal predecessors, (25415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:41,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9958 states to 9958 states and 25415 transitions. [2021-06-05 21:07:41,073 INFO L78 Accepts]: Start accepts. Automaton has 9958 states and 25415 transitions. Word has length 53 [2021-06-05 21:07:41,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:07:41,073 INFO L482 AbstractCegarLoop]: Abstraction has 9958 states and 25415 transitions. [2021-06-05 21:07:41,073 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:41,073 INFO L276 IsEmpty]: Start isEmpty. Operand 9958 states and 25415 transitions. [2021-06-05 21:07:41,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 21:07:41,080 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:07:41,080 INFO L554 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:07:41,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 361 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable749 [2021-06-05 21:07:41,281 INFO L430 AbstractCegarLoop]: === Iteration 370 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:07:41,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:07:41,281 INFO L82 PathProgramCache]: Analyzing trace with hash -217067145, now seen corresponding path program 211 times [2021-06-05 21:07:41,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:07:41,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825971383] [2021-06-05 21:07:41,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:07:41,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:07:41,426 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 66 proven. 68 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:07:41,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:07:41,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825971383] [2021-06-05 21:07:41,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825971383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:41,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668869524] [2021-06-05 21:07:41,427 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:07:41,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:07:41,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:07:41,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:07:41,530 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 66 proven. 68 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:07:41,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668869524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:41,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:07:41,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-05 21:07:41,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589436748] [2021-06-05 21:07:41,531 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:07:41,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:07:41,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:07:41,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:07:41,531 INFO L87 Difference]: Start difference. First operand 9958 states and 25415 transitions. Second operand has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:41,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:07:41,842 INFO L93 Difference]: Finished difference Result 12529 states and 31068 transitions. [2021-06-05 21:07:41,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:07:41,842 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 21:07:41,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:07:41,854 INFO L225 Difference]: With dead ends: 12529 [2021-06-05 21:07:41,855 INFO L226 Difference]: Without dead ends: 12529 [2021-06-05 21:07:41,855 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 216.8ms TimeCoverageRelationStatistics Valid=200, Invalid=352, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:07:41,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12529 states. [2021-06-05 21:07:41,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12529 to 10698. [2021-06-05 21:07:41,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10698 states, 10697 states have (on average 2.5853977750771246) internal successors, (27656), 10697 states have internal predecessors, (27656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:41,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10698 states to 10698 states and 27656 transitions. [2021-06-05 21:07:41,993 INFO L78 Accepts]: Start accepts. Automaton has 10698 states and 27656 transitions. Word has length 53 [2021-06-05 21:07:41,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:07:41,993 INFO L482 AbstractCegarLoop]: Abstraction has 10698 states and 27656 transitions. [2021-06-05 21:07:41,993 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:41,993 INFO L276 IsEmpty]: Start isEmpty. Operand 10698 states and 27656 transitions. [2021-06-05 21:07:42,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 21:07:42,000 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:07:42,000 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:07:42,201 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable750,362 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:07:42,201 INFO L430 AbstractCegarLoop]: === Iteration 371 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:07:42,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:07:42,201 INFO L82 PathProgramCache]: Analyzing trace with hash 2097202474, now seen corresponding path program 101 times [2021-06-05 21:07:42,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:07:42,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436487435] [2021-06-05 21:07:42,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:07:42,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:07:42,325 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 125 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:07:42,326 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:07:42,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436487435] [2021-06-05 21:07:42,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436487435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:42,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352111262] [2021-06-05 21:07:42,326 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:07:42,372 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 21:07:42,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:07:42,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 21:07:42,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:07:42,458 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 125 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:07:42,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352111262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:42,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:07:42,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:07:42,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690456674] [2021-06-05 21:07:42,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:07:42,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:07:42,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:07:42,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:07:42,459 INFO L87 Difference]: Start difference. First operand 10698 states and 27656 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:43,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:07:43,064 INFO L93 Difference]: Finished difference Result 14809 states and 36436 transitions. [2021-06-05 21:07:43,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:07:43,064 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 21:07:43,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:07:43,079 INFO L225 Difference]: With dead ends: 14809 [2021-06-05 21:07:43,079 INFO L226 Difference]: Without dead ends: 14757 [2021-06-05 21:07:43,079 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 293.4ms TimeCoverageRelationStatistics Valid=138, Invalid=732, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:07:43,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14757 states. [2021-06-05 21:07:43,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14757 to 10607. [2021-06-05 21:07:43,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10607 states, 10606 states have (on average 2.587309070337545) internal successors, (27441), 10606 states have internal predecessors, (27441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:43,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10607 states to 10607 states and 27441 transitions. [2021-06-05 21:07:43,225 INFO L78 Accepts]: Start accepts. Automaton has 10607 states and 27441 transitions. Word has length 53 [2021-06-05 21:07:43,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:07:43,225 INFO L482 AbstractCegarLoop]: Abstraction has 10607 states and 27441 transitions. [2021-06-05 21:07:43,225 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:43,225 INFO L276 IsEmpty]: Start isEmpty. Operand 10607 states and 27441 transitions. [2021-06-05 21:07:43,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 21:07:43,232 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:07:43,232 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:07:43,433 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 363 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable751 [2021-06-05 21:07:43,433 INFO L430 AbstractCegarLoop]: === Iteration 372 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:07:43,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:07:43,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1617639658, now seen corresponding path program 212 times [2021-06-05 21:07:43,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:07:43,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644567141] [2021-06-05 21:07:43,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:07:43,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:07:43,550 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 16 proven. 116 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:07:43,550 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:07:43,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644567141] [2021-06-05 21:07:43,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644567141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:43,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571366105] [2021-06-05 21:07:43,551 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 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:07:43,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:07:43,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:07:43,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 21:07:43,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:07:43,763 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 119 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:07:43,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571366105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:43,764 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:07:43,764 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2021-06-05 21:07:43,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558685445] [2021-06-05 21:07:43,764 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:07:43,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:07:43,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:07:43,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:07:43,764 INFO L87 Difference]: Start difference. First operand 10607 states and 27441 transitions. Second operand has 19 states, 19 states have (on average 3.6315789473684212) internal successors, (69), 18 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:44,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:07:44,352 INFO L93 Difference]: Finished difference Result 10731 states and 27633 transitions. [2021-06-05 21:07:44,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:07:44,352 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.6315789473684212) internal successors, (69), 18 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 21:07:44,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:07:44,364 INFO L225 Difference]: With dead ends: 10731 [2021-06-05 21:07:44,364 INFO L226 Difference]: Without dead ends: 10675 [2021-06-05 21:07:44,364 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 198.4ms TimeCoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:07:44,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10675 states. [2021-06-05 21:07:44,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10675 to 10607. [2021-06-05 21:07:44,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10607 states, 10606 states have (on average 2.5841976239864226) internal successors, (27408), 10606 states have internal predecessors, (27408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:44,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10607 states to 10607 states and 27408 transitions. [2021-06-05 21:07:44,501 INFO L78 Accepts]: Start accepts. Automaton has 10607 states and 27408 transitions. Word has length 53 [2021-06-05 21:07:44,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:07:44,501 INFO L482 AbstractCegarLoop]: Abstraction has 10607 states and 27408 transitions. [2021-06-05 21:07:44,501 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.6315789473684212) internal successors, (69), 18 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:44,501 INFO L276 IsEmpty]: Start isEmpty. Operand 10607 states and 27408 transitions. [2021-06-05 21:07:44,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 21:07:44,508 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:07:44,508 INFO L554 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:07:44,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 364 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable752 [2021-06-05 21:07:44,709 INFO L430 AbstractCegarLoop]: === Iteration 373 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:07:44,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:07:44,709 INFO L82 PathProgramCache]: Analyzing trace with hash -290292687, now seen corresponding path program 102 times [2021-06-05 21:07:44,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:07:44,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88510063] [2021-06-05 21:07:44,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:07:44,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:07:44,792 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 42 proven. 91 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:07:44,792 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:07:44,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88510063] [2021-06-05 21:07:44,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88510063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:44,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331312447] [2021-06-05 21:07:44,792 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:07:44,819 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 21:07:44,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:07:44,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:07:44,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:07:44,914 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 43 proven. 91 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:07:44,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331312447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:44,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:07:44,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 16 [2021-06-05 21:07:44,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341002880] [2021-06-05 21:07:44,914 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:07:44,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:07:44,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:07:44,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:07:44,915 INFO L87 Difference]: Start difference. First operand 10607 states and 27408 transitions. Second operand has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 16 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:45,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:07:45,222 INFO L93 Difference]: Finished difference Result 12680 states and 31642 transitions. [2021-06-05 21:07:45,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:07:45,222 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 16 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 21:07:45,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:07:45,235 INFO L225 Difference]: With dead ends: 12680 [2021-06-05 21:07:45,235 INFO L226 Difference]: Without dead ends: 12630 [2021-06-05 21:07:45,235 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 136.2ms TimeCoverageRelationStatistics Valid=129, Invalid=333, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:07:45,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12630 states. [2021-06-05 21:07:45,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12630 to 10144. [2021-06-05 21:07:45,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10144 states, 10143 states have (on average 2.5837523415163166) internal successors, (26207), 10143 states have internal predecessors, (26207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:45,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10144 states to 10144 states and 26207 transitions. [2021-06-05 21:07:45,405 INFO L78 Accepts]: Start accepts. Automaton has 10144 states and 26207 transitions. Word has length 53 [2021-06-05 21:07:45,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:07:45,405 INFO L482 AbstractCegarLoop]: Abstraction has 10144 states and 26207 transitions. [2021-06-05 21:07:45,405 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 16 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:45,405 INFO L276 IsEmpty]: Start isEmpty. Operand 10144 states and 26207 transitions. [2021-06-05 21:07:45,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 21:07:45,412 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:07:45,412 INFO L554 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:07:45,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable753,365 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:07:45,612 INFO L430 AbstractCegarLoop]: === Iteration 374 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:07:45,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:07:45,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1595716629, now seen corresponding path program 213 times [2021-06-05 21:07:45,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:07:45,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266790010] [2021-06-05 21:07:45,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:07:45,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:07:45,699 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 64 proven. 70 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:07:45,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:07:45,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266790010] [2021-06-05 21:07:45,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266790010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:45,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176498902] [2021-06-05 21:07:45,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:07:45,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 21:07:45,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:07:45,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:07:45,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:07:45,806 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 64 proven. 70 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:07:45,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176498902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:45,806 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:07:45,806 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-06-05 21:07:45,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818546831] [2021-06-05 21:07:45,806 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:07:45,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:07:45,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:07:45,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:07:45,807 INFO L87 Difference]: Start difference. First operand 10144 states and 26207 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:46,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:07:46,112 INFO L93 Difference]: Finished difference Result 12591 states and 31328 transitions. [2021-06-05 21:07:46,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:07:46,112 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 21:07:46,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:07:46,126 INFO L225 Difference]: With dead ends: 12591 [2021-06-05 21:07:46,126 INFO L226 Difference]: Without dead ends: 12591 [2021-06-05 21:07:46,126 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 134.2ms TimeCoverageRelationStatistics Valid=157, Invalid=263, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:07:46,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12591 states. [2021-06-05 21:07:46,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12591 to 10616. [2021-06-05 21:07:46,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10616 states, 10615 states have (on average 2.6016015073009893) internal successors, (27616), 10615 states have internal predecessors, (27616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:46,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10616 states to 10616 states and 27616 transitions. [2021-06-05 21:07:46,268 INFO L78 Accepts]: Start accepts. Automaton has 10616 states and 27616 transitions. Word has length 53 [2021-06-05 21:07:46,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:07:46,268 INFO L482 AbstractCegarLoop]: Abstraction has 10616 states and 27616 transitions. [2021-06-05 21:07:46,268 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:46,268 INFO L276 IsEmpty]: Start isEmpty. Operand 10616 states and 27616 transitions. [2021-06-05 21:07:46,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 21:07:46,274 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:07:46,275 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:07:46,475 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 366 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable759 [2021-06-05 21:07:46,475 INFO L430 AbstractCegarLoop]: === Iteration 375 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:07:46,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:07:46,475 INFO L82 PathProgramCache]: Analyzing trace with hash -2006879870, now seen corresponding path program 103 times [2021-06-05 21:07:46,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:07:46,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185710679] [2021-06-05 21:07:46,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:07:46,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:07:46,570 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 125 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:07:46,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:07:46,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185710679] [2021-06-05 21:07:46,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185710679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:46,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292902736] [2021-06-05 21:07:46,570 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:07:46,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:07:46,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 21:07:46,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:07:46,669 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 125 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:07:46,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292902736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:46,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:07:46,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 21:07:46,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749930191] [2021-06-05 21:07:46,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:07:46,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:07:46,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:07:46,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:07:46,670 INFO L87 Difference]: Start difference. First operand 10616 states and 27616 transitions. Second operand has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:47,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:07:47,202 INFO L93 Difference]: Finished difference Result 13894 states and 34616 transitions. [2021-06-05 21:07:47,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:07:47,202 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 21:07:47,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:07:47,218 INFO L225 Difference]: With dead ends: 13894 [2021-06-05 21:07:47,218 INFO L226 Difference]: Without dead ends: 13880 [2021-06-05 21:07:47,218 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 219.3ms TimeCoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:07:47,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13880 states. [2021-06-05 21:07:47,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13880 to 10564. [2021-06-05 21:07:47,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10564 states, 10563 states have (on average 2.6058884786518983) internal successors, (27526), 10563 states have internal predecessors, (27526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:47,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10564 states to 10564 states and 27526 transitions. [2021-06-05 21:07:47,376 INFO L78 Accepts]: Start accepts. Automaton has 10564 states and 27526 transitions. Word has length 53 [2021-06-05 21:07:47,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:07:47,376 INFO L482 AbstractCegarLoop]: Abstraction has 10564 states and 27526 transitions. [2021-06-05 21:07:47,376 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:47,376 INFO L276 IsEmpty]: Start isEmpty. Operand 10564 states and 27526 transitions. [2021-06-05 21:07:47,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 21:07:47,383 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:07:47,383 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:07:47,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable760,367 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:07:47,584 INFO L430 AbstractCegarLoop]: === Iteration 376 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:07:47,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:07:47,584 INFO L82 PathProgramCache]: Analyzing trace with hash 2126035330, now seen corresponding path program 214 times [2021-06-05 21:07:47,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:07:47,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896132005] [2021-06-05 21:07:47,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:07:47,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:07:47,690 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 16 proven. 116 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:07:47,690 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:07:47,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896132005] [2021-06-05 21:07:47,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896132005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:47,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601532955] [2021-06-05 21:07:47,690 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:07:47,717 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:07:47,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:07:47,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 21:07:47,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:07:47,880 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 119 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:07:47,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601532955] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:47,880 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:07:47,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 21:07:47,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123553750] [2021-06-05 21:07:47,881 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:07:47,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:07:47,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:07:47,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:07:47,881 INFO L87 Difference]: Start difference. First operand 10564 states and 27526 transitions. Second operand has 17 states, 17 states have (on average 3.8823529411764706) internal successors, (66), 16 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:48,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:07:48,468 INFO L93 Difference]: Finished difference Result 10719 states and 27762 transitions. [2021-06-05 21:07:48,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:07:48,469 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.8823529411764706) internal successors, (66), 16 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 21:07:48,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:07:48,480 INFO L225 Difference]: With dead ends: 10719 [2021-06-05 21:07:48,480 INFO L226 Difference]: Without dead ends: 10675 [2021-06-05 21:07:48,480 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 177.2ms TimeCoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:07:48,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10675 states. [2021-06-05 21:07:48,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10675 to 10564. [2021-06-05 21:07:48,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10564 states, 10563 states have (on average 2.6041844173056896) internal successors, (27508), 10563 states have internal predecessors, (27508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:48,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10564 states to 10564 states and 27508 transitions. [2021-06-05 21:07:48,609 INFO L78 Accepts]: Start accepts. Automaton has 10564 states and 27508 transitions. Word has length 53 [2021-06-05 21:07:48,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:07:48,609 INFO L482 AbstractCegarLoop]: Abstraction has 10564 states and 27508 transitions. [2021-06-05 21:07:48,609 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.8823529411764706) internal successors, (66), 16 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:48,609 INFO L276 IsEmpty]: Start isEmpty. Operand 10564 states and 27508 transitions. [2021-06-05 21:07:48,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 21:07:48,616 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:07:48,616 INFO L554 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:07:48,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 368 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable761 [2021-06-05 21:07:48,816 INFO L430 AbstractCegarLoop]: === Iteration 377 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:07:48,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:07:48,817 INFO L82 PathProgramCache]: Analyzing trace with hash 145337653, now seen corresponding path program 104 times [2021-06-05 21:07:48,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:07:48,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695805975] [2021-06-05 21:07:48,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:07:48,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:07:48,900 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 50 proven. 84 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:07:48,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:07:48,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695805975] [2021-06-05 21:07:48,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695805975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:48,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878422791] [2021-06-05 21:07:48,901 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:07:48,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:07:48,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:07:48,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:07:48,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:07:49,007 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 51 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:07:49,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878422791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:49,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:07:49,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 14 [2021-06-05 21:07:49,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182446241] [2021-06-05 21:07:49,008 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:07:49,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:07:49,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:07:49,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:07:49,008 INFO L87 Difference]: Start difference. First operand 10564 states and 27508 transitions. Second operand has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:49,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:07:49,215 INFO L93 Difference]: Finished difference Result 12086 states and 30576 transitions. [2021-06-05 21:07:49,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:07:49,216 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 21:07:49,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:07:49,228 INFO L225 Difference]: With dead ends: 12086 [2021-06-05 21:07:49,229 INFO L226 Difference]: Without dead ends: 12002 [2021-06-05 21:07:49,229 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 111.9ms TimeCoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:07:49,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12002 states. [2021-06-05 21:07:49,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12002 to 9748. [2021-06-05 21:07:49,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9748 states, 9747 states have (on average 2.6030573509797885) internal successors, (25372), 9747 states have internal predecessors, (25372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:49,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9748 states to 9748 states and 25372 transitions. [2021-06-05 21:07:49,397 INFO L78 Accepts]: Start accepts. Automaton has 9748 states and 25372 transitions. Word has length 53 [2021-06-05 21:07:49,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:07:49,397 INFO L482 AbstractCegarLoop]: Abstraction has 9748 states and 25372 transitions. [2021-06-05 21:07:49,397 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:49,398 INFO L276 IsEmpty]: Start isEmpty. Operand 9748 states and 25372 transitions. [2021-06-05 21:07:49,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 21:07:49,405 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:07:49,405 INFO L554 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:07:49,605 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable762,369 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:07:49,605 INFO L430 AbstractCegarLoop]: === Iteration 378 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:07:49,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:07:49,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1808139831, now seen corresponding path program 215 times [2021-06-05 21:07:49,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:07:49,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370579072] [2021-06-05 21:07:49,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:07:49,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:07:49,681 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 62 proven. 72 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:07:49,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:07:49,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370579072] [2021-06-05 21:07:49,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370579072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:49,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851666829] [2021-06-05 21:07:49,681 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:07:49,714 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 21:07:49,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:07:49,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:07:49,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:07:49,803 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 64 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:07:49,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851666829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:49,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:07:49,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 14 [2021-06-05 21:07:49,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146424137] [2021-06-05 21:07:49,804 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:07:49,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:07:49,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:07:49,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:07:49,804 INFO L87 Difference]: Start difference. First operand 9748 states and 25372 transitions. Second operand has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:50,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:07:50,076 INFO L93 Difference]: Finished difference Result 12328 states and 30680 transitions. [2021-06-05 21:07:50,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:07:50,077 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 21:07:50,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:07:50,090 INFO L225 Difference]: With dead ends: 12328 [2021-06-05 21:07:50,090 INFO L226 Difference]: Without dead ends: 12328 [2021-06-05 21:07:50,090 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 117.9ms TimeCoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:07:50,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12328 states. [2021-06-05 21:07:50,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12328 to 10133. [2021-06-05 21:07:50,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10133 states, 10132 states have (on average 2.618041847611528) internal successors, (26526), 10132 states have internal predecessors, (26526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:50,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10133 states to 10133 states and 26526 transitions. [2021-06-05 21:07:50,227 INFO L78 Accepts]: Start accepts. Automaton has 10133 states and 26526 transitions. Word has length 53 [2021-06-05 21:07:50,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:07:50,227 INFO L482 AbstractCegarLoop]: Abstraction has 10133 states and 26526 transitions. [2021-06-05 21:07:50,227 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:50,227 INFO L276 IsEmpty]: Start isEmpty. Operand 10133 states and 26526 transitions. [2021-06-05 21:07:50,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 21:07:50,233 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:07:50,233 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:07:50,433 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable768,370 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:07:50,433 INFO L430 AbstractCegarLoop]: === Iteration 379 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:07:50,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:07:50,434 INFO L82 PathProgramCache]: Analyzing trace with hash -933239766, now seen corresponding path program 105 times [2021-06-05 21:07:50,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:07:50,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156369565] [2021-06-05 21:07:50,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:07:50,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:07:50,526 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 125 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:07:50,526 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:07:50,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156369565] [2021-06-05 21:07:50,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156369565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:50,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146940383] [2021-06-05 21:07:50,526 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:07:50,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 21:07:50,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:07:50,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 21:07:50,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:07:50,629 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 125 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:07:50,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146940383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:50,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:07:50,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:07:50,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709022879] [2021-06-05 21:07:50,630 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:07:50,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:07:50,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:07:50,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:07:50,630 INFO L87 Difference]: Start difference. First operand 10133 states and 26526 transitions. Second operand has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:51,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:07:51,106 INFO L93 Difference]: Finished difference Result 12314 states and 31139 transitions. [2021-06-05 21:07:51,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:07:51,106 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 21:07:51,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:07:51,119 INFO L225 Difference]: With dead ends: 12314 [2021-06-05 21:07:51,120 INFO L226 Difference]: Without dead ends: 12300 [2021-06-05 21:07:51,120 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 179.3ms TimeCoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:07:51,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12300 states. [2021-06-05 21:07:51,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12300 to 10160. [2021-06-05 21:07:51,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10160 states, 10159 states have (on average 2.6188601240279556) internal successors, (26605), 10159 states have internal predecessors, (26605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:51,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10160 states to 10160 states and 26605 transitions. [2021-06-05 21:07:51,249 INFO L78 Accepts]: Start accepts. Automaton has 10160 states and 26605 transitions. Word has length 53 [2021-06-05 21:07:51,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:07:51,249 INFO L482 AbstractCegarLoop]: Abstraction has 10160 states and 26605 transitions. [2021-06-05 21:07:51,249 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:51,250 INFO L276 IsEmpty]: Start isEmpty. Operand 10160 states and 26605 transitions. [2021-06-05 21:07:51,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 21:07:51,256 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:07:51,256 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:07:51,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 371 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable769 [2021-06-05 21:07:51,456 INFO L430 AbstractCegarLoop]: === Iteration 380 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:07:51,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:07:51,457 INFO L82 PathProgramCache]: Analyzing trace with hash -1110130710, now seen corresponding path program 216 times [2021-06-05 21:07:51,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:07:51,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374502074] [2021-06-05 21:07:51,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:07:51,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:07:51,550 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 16 proven. 116 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:07:51,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:07:51,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374502074] [2021-06-05 21:07:51,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374502074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:51,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369312063] [2021-06-05 21:07:51,551 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:07:51,579 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 21:07:51,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:07:51,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 21:07:51,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:07:51,714 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 119 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:07:51,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369312063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:51,714 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:07:51,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-05 21:07:51,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885025864] [2021-06-05 21:07:51,715 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:07:51,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:07:51,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:07:51,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:07:51,715 INFO L87 Difference]: Start difference. First operand 10160 states and 26605 transitions. Second operand has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:52,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:07:52,067 INFO L93 Difference]: Finished difference Result 10211 states and 26683 transitions. [2021-06-05 21:07:52,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:07:52,067 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 21:07:52,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:07:52,078 INFO L225 Difference]: With dead ends: 10211 [2021-06-05 21:07:52,078 INFO L226 Difference]: Without dead ends: 10179 [2021-06-05 21:07:52,079 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 119.8ms TimeCoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:07:52,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10179 states. [2021-06-05 21:07:52,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10179 to 10160. [2021-06-05 21:07:52,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10160 states, 10159 states have (on average 2.6182695147160153) internal successors, (26599), 10159 states have internal predecessors, (26599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:52,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10160 states to 10160 states and 26599 transitions. [2021-06-05 21:07:52,193 INFO L78 Accepts]: Start accepts. Automaton has 10160 states and 26599 transitions. Word has length 53 [2021-06-05 21:07:52,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:07:52,193 INFO L482 AbstractCegarLoop]: Abstraction has 10160 states and 26599 transitions. [2021-06-05 21:07:52,194 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:52,194 INFO L276 IsEmpty]: Start isEmpty. Operand 10160 states and 26599 transitions. [2021-06-05 21:07:52,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 21:07:52,200 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:07:52,200 INFO L554 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:07:52,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable770,372 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:07:52,400 INFO L430 AbstractCegarLoop]: === Iteration 381 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:07:52,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:07:52,400 INFO L82 PathProgramCache]: Analyzing trace with hash -1855932587, now seen corresponding path program 217 times [2021-06-05 21:07:52,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:07:52,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128330580] [2021-06-05 21:07:52,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:07:52,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:07:52,467 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 60 proven. 74 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:07:52,467 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:07:52,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128330580] [2021-06-05 21:07:52,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128330580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:52,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245390665] [2021-06-05 21:07:52,467 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:07:52,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:07:52,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:07:52,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:07:52,587 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 95 proven. 39 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:07:52,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245390665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:52,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:07:52,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-05 21:07:52,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094342015] [2021-06-05 21:07:52,588 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:07:52,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:07:52,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:07:52,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:07:52,588 INFO L87 Difference]: Start difference. First operand 10160 states and 26599 transitions. Second operand has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 13 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:52,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:07:52,837 INFO L93 Difference]: Finished difference Result 12704 states and 31833 transitions. [2021-06-05 21:07:52,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:07:52,837 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 13 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 21:07:52,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:07:52,851 INFO L225 Difference]: With dead ends: 12704 [2021-06-05 21:07:52,851 INFO L226 Difference]: Without dead ends: 12704 [2021-06-05 21:07:52,851 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 96.0ms TimeCoverageRelationStatistics Valid=113, Invalid=159, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:07:52,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12704 states. [2021-06-05 21:07:53,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12704 to 10580. [2021-06-05 21:07:53,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10580 states, 10579 states have (on average 2.632668494186596) internal successors, (27851), 10579 states have internal predecessors, (27851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:53,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10580 states to 10580 states and 27851 transitions. [2021-06-05 21:07:53,042 INFO L78 Accepts]: Start accepts. Automaton has 10580 states and 27851 transitions. Word has length 53 [2021-06-05 21:07:53,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:07:53,042 INFO L482 AbstractCegarLoop]: Abstraction has 10580 states and 27851 transitions. [2021-06-05 21:07:53,042 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 13 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:53,042 INFO L276 IsEmpty]: Start isEmpty. Operand 10580 states and 27851 transitions. [2021-06-05 21:07:53,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 21:07:53,049 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:07:53,049 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:07:53,250 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 373 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable771 [2021-06-05 21:07:53,250 INFO L430 AbstractCegarLoop]: === Iteration 382 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:07:53,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:07:53,250 INFO L82 PathProgramCache]: Analyzing trace with hash 1668199042, now seen corresponding path program 106 times [2021-06-05 21:07:53,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:07:53,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882667671] [2021-06-05 21:07:53,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:07:53,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:07:53,328 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 125 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:07:53,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:07:53,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882667671] [2021-06-05 21:07:53,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882667671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:53,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769789506] [2021-06-05 21:07:53,328 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:07:53,357 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:07:53,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:07:53,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 21:07:53,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:07:53,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:07:53,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2021-06-05 21:07:53,463 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:07:53,465 INFO L628 ElimStorePlain]: treesize reduction 20, result has 4.8 percent of original size [2021-06-05 21:07:53,465 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-06-05 21:07:53,465 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:07:53,465 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:1 [2021-06-05 21:07:53,470 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 125 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:07:53,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769789506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:53,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:07:53,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-05 21:07:53,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804075128] [2021-06-05 21:07:53,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:07:53,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:07:53,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:07:53,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:07:53,471 INFO L87 Difference]: Start difference. First operand 10580 states and 27851 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:54,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:07:54,037 INFO L93 Difference]: Finished difference Result 13655 states and 34305 transitions. [2021-06-05 21:07:54,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:07:54,038 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 21:07:54,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:07:54,052 INFO L225 Difference]: With dead ends: 13655 [2021-06-05 21:07:54,052 INFO L226 Difference]: Without dead ends: 13599 [2021-06-05 21:07:54,053 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 169.7ms TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:07:54,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13599 states. [2021-06-05 21:07:54,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13599 to 11353. [2021-06-05 21:07:54,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11353 states, 11352 states have (on average 2.6204193093727977) internal successors, (29747), 11352 states have internal predecessors, (29747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:54,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11353 states to 11353 states and 29747 transitions. [2021-06-05 21:07:54,209 INFO L78 Accepts]: Start accepts. Automaton has 11353 states and 29747 transitions. Word has length 53 [2021-06-05 21:07:54,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:07:54,209 INFO L482 AbstractCegarLoop]: Abstraction has 11353 states and 29747 transitions. [2021-06-05 21:07:54,209 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:54,210 INFO L276 IsEmpty]: Start isEmpty. Operand 11353 states and 29747 transitions. [2021-06-05 21:07:54,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 21:07:54,217 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:07:54,217 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:07:54,418 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 374 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable774 [2021-06-05 21:07:54,419 INFO L430 AbstractCegarLoop]: === Iteration 383 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:07:54,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:07:54,419 INFO L82 PathProgramCache]: Analyzing trace with hash 34902658, now seen corresponding path program 218 times [2021-06-05 21:07:54,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:07:54,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7869555] [2021-06-05 21:07:54,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:07:54,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:07:54,502 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 16 proven. 116 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:07:54,502 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:07:54,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7869555] [2021-06-05 21:07:54,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7869555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:54,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645486845] [2021-06-05 21:07:54,502 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:07:54,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:07:54,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:07:54,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 21:07:54,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:07:54,636 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 119 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:07:54,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645486845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:54,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:07:54,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-05 21:07:54,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040714887] [2021-06-05 21:07:54,636 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:07:54,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:07:54,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:07:54,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:07:54,637 INFO L87 Difference]: Start difference. First operand 11353 states and 29747 transitions. Second operand has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:54,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:07:54,957 INFO L93 Difference]: Finished difference Result 11423 states and 29849 transitions. [2021-06-05 21:07:54,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:07:54,957 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 21:07:54,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:07:54,968 INFO L225 Difference]: With dead ends: 11423 [2021-06-05 21:07:54,969 INFO L226 Difference]: Without dead ends: 11403 [2021-06-05 21:07:54,969 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 103.6ms TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:07:54,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11403 states. [2021-06-05 21:07:55,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11403 to 11353. [2021-06-05 21:07:55,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11353 states, 11352 states have (on average 2.62015503875969) internal successors, (29744), 11352 states have internal predecessors, (29744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:55,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11353 states to 11353 states and 29744 transitions. [2021-06-05 21:07:55,103 INFO L78 Accepts]: Start accepts. Automaton has 11353 states and 29744 transitions. Word has length 53 [2021-06-05 21:07:55,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:07:55,103 INFO L482 AbstractCegarLoop]: Abstraction has 11353 states and 29744 transitions. [2021-06-05 21:07:55,103 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:55,104 INFO L276 IsEmpty]: Start isEmpty. Operand 11353 states and 29744 transitions. [2021-06-05 21:07:55,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 21:07:55,111 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:07:55,111 INFO L554 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:07:55,311 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable775,375 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:07:55,312 INFO L430 AbstractCegarLoop]: === Iteration 384 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:07:55,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:07:55,318 INFO L82 PathProgramCache]: Analyzing trace with hash 1588490357, now seen corresponding path program 107 times [2021-06-05 21:07:55,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:07:55,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13493808] [2021-06-05 21:07:55,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:07:55,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:07:55,393 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 58 proven. 76 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:07:55,393 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:07:55,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13493808] [2021-06-05 21:07:55,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13493808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:55,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756258120] [2021-06-05 21:07:55,393 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:07:55,422 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 21:07:55,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:07:55,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:07:55,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:07:55,545 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 60 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:07:55,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756258120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:55,546 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:07:55,546 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16] total 19 [2021-06-05 21:07:55,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650789873] [2021-06-05 21:07:55,546 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 21:07:55,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:07:55,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 21:07:55,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:07:55,546 INFO L87 Difference]: Start difference. First operand 11353 states and 29744 transitions. Second operand has 20 states, 20 states have (on average 4.0) internal successors, (80), 19 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:55,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:07:55,885 INFO L93 Difference]: Finished difference Result 12639 states and 32192 transitions. [2021-06-05 21:07:55,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:07:55,886 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.0) internal successors, (80), 19 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 21:07:55,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:07:55,901 INFO L225 Difference]: With dead ends: 12639 [2021-06-05 21:07:55,902 INFO L226 Difference]: Without dead ends: 12617 [2021-06-05 21:07:55,902 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 133.5ms TimeCoverageRelationStatistics Valid=127, Invalid=379, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:07:55,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12617 states. [2021-06-05 21:07:56,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12617 to 11299. [2021-06-05 21:07:56,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11299 states, 11298 states have (on average 2.6222340237210124) internal successors, (29626), 11298 states have internal predecessors, (29626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:56,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11299 states to 11299 states and 29626 transitions. [2021-06-05 21:07:56,060 INFO L78 Accepts]: Start accepts. Automaton has 11299 states and 29626 transitions. Word has length 53 [2021-06-05 21:07:56,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:07:56,060 INFO L482 AbstractCegarLoop]: Abstraction has 11299 states and 29626 transitions. [2021-06-05 21:07:56,060 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 4.0) internal successors, (80), 19 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:56,060 INFO L276 IsEmpty]: Start isEmpty. Operand 11299 states and 29626 transitions. [2021-06-05 21:07:56,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 21:07:56,068 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:07:56,068 INFO L554 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:07:56,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 376 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable776 [2021-06-05 21:07:56,268 INFO L430 AbstractCegarLoop]: === Iteration 385 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:07:56,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:07:56,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1668467447, now seen corresponding path program 219 times [2021-06-05 21:07:56,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:07:56,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985869280] [2021-06-05 21:07:56,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:07:56,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:07:56,341 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 58 proven. 76 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:07:56,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:07:56,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985869280] [2021-06-05 21:07:56,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985869280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:56,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143703754] [2021-06-05 21:07:56,341 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 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:07:56,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 21:07:56,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:07:56,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:07:56,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:07:56,463 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 58 proven. 76 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:07:56,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143703754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:56,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:07:56,463 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 21:07:56,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399196587] [2021-06-05 21:07:56,464 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:07:56,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:07:56,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:07:56,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:07:56,464 INFO L87 Difference]: Start difference. First operand 11299 states and 29626 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:56,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:07:56,625 INFO L93 Difference]: Finished difference Result 14216 states and 35571 transitions. [2021-06-05 21:07:56,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:07:56,626 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 21:07:56,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:07:56,643 INFO L225 Difference]: With dead ends: 14216 [2021-06-05 21:07:56,643 INFO L226 Difference]: Without dead ends: 14216 [2021-06-05 21:07:56,643 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 67.7ms TimeCoverageRelationStatistics Valid=58, Invalid=74, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:07:56,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14216 states. [2021-06-05 21:07:56,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14216 to 11759. [2021-06-05 21:07:56,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11759 states, 11758 states have (on average 2.634886885524749) internal successors, (30981), 11758 states have internal predecessors, (30981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:56,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11759 states to 11759 states and 30981 transitions. [2021-06-05 21:07:56,840 INFO L78 Accepts]: Start accepts. Automaton has 11759 states and 30981 transitions. Word has length 53 [2021-06-05 21:07:56,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:07:56,840 INFO L482 AbstractCegarLoop]: Abstraction has 11759 states and 30981 transitions. [2021-06-05 21:07:56,840 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:56,841 INFO L276 IsEmpty]: Start isEmpty. Operand 11759 states and 30981 transitions. [2021-06-05 21:07:56,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 21:07:56,848 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:07:56,848 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:07:57,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable779,377 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:07:57,048 INFO L430 AbstractCegarLoop]: === Iteration 386 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:07:57,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:07:57,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1430405930, now seen corresponding path program 108 times [2021-06-05 21:07:57,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:07:57,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391243028] [2021-06-05 21:07:57,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:07:57,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:07:57,142 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 125 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:07:57,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:07:57,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391243028] [2021-06-05 21:07:57,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391243028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:57,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996172958] [2021-06-05 21:07:57,143 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:07:57,172 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 21:07:57,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:07:57,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 21:07:57,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:07:57,247 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 125 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:07:57,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996172958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:57,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:07:57,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 21:07:57,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440780031] [2021-06-05 21:07:57,248 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:07:57,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:07:57,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:07:57,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:07:57,248 INFO L87 Difference]: Start difference. First operand 11759 states and 30981 transitions. Second operand has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:57,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:07:57,688 INFO L93 Difference]: Finished difference Result 12771 states and 32920 transitions. [2021-06-05 21:07:57,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:07:57,689 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 21:07:57,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:07:57,704 INFO L225 Difference]: With dead ends: 12771 [2021-06-05 21:07:57,704 INFO L226 Difference]: Without dead ends: 12763 [2021-06-05 21:07:57,705 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 132.7ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:07:57,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12763 states. [2021-06-05 21:07:57,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12763 to 11651. [2021-06-05 21:07:57,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11651 states, 11650 states have (on average 2.6366523605150216) internal successors, (30717), 11650 states have internal predecessors, (30717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:57,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11651 states to 11651 states and 30717 transitions. [2021-06-05 21:07:57,865 INFO L78 Accepts]: Start accepts. Automaton has 11651 states and 30717 transitions. Word has length 53 [2021-06-05 21:07:57,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:07:57,865 INFO L482 AbstractCegarLoop]: Abstraction has 11651 states and 30717 transitions. [2021-06-05 21:07:57,866 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) [2021-06-05 21:07:57,866 INFO L276 IsEmpty]: Start isEmpty. Operand 11651 states and 30717 transitions. [2021-06-05 21:07:57,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 21:07:57,873 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:07:57,873 INFO L554 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:07:58,073 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable780,378 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:07:58,073 INFO L430 AbstractCegarLoop]: === Iteration 387 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:07:58,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:07:58,074 INFO L82 PathProgramCache]: Analyzing trace with hash -123290927, now seen corresponding path program 220 times [2021-06-05 21:07:58,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:07:58,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055378110] [2021-06-05 21:07:58,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:07:58,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:07:58,133 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 72 proven. 62 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:07:58,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:07:58,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055378110] [2021-06-05 21:07:58,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055378110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:58,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190490964] [2021-06-05 21:07:58,134 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:07:58,159 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:07:58,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:07:58,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:07:58,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:07:58,236 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 72 proven. 62 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:07:58,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190490964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:58,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:07:58,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 21:07:58,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209762052] [2021-06-05 21:07:58,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:07:58,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:07:58,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:07:58,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:07:58,237 INFO L87 Difference]: Start difference. First operand 11651 states and 30717 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:58,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:07:58,382 INFO L93 Difference]: Finished difference Result 13925 states and 34879 transitions. [2021-06-05 21:07:58,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:07:58,383 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 21:07:58,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:07:58,399 INFO L225 Difference]: With dead ends: 13925 [2021-06-05 21:07:58,399 INFO L226 Difference]: Without dead ends: 13922 [2021-06-05 21:07:58,399 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 54.8ms TimeCoverageRelationStatistics Valid=58, Invalid=74, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:07:58,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13922 states. [2021-06-05 21:07:58,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13922 to 11650. [2021-06-05 21:07:58,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11650 states, 11649 states have (on average 2.6362777920851577) internal successors, (30710), 11649 states have internal predecessors, (30710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:58,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11650 states to 11650 states and 30710 transitions. [2021-06-05 21:07:58,569 INFO L78 Accepts]: Start accepts. Automaton has 11650 states and 30710 transitions. Word has length 53 [2021-06-05 21:07:58,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:07:58,569 INFO L482 AbstractCegarLoop]: Abstraction has 11650 states and 30710 transitions. [2021-06-05 21:07:58,569 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:58,569 INFO L276 IsEmpty]: Start isEmpty. Operand 11650 states and 30710 transitions. [2021-06-05 21:07:58,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 21:07:58,577 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:07:58,577 INFO L554 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:07:58,777 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable781,379 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:07:58,777 INFO L430 AbstractCegarLoop]: === Iteration 388 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:07:58,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:07:58,778 INFO L82 PathProgramCache]: Analyzing trace with hash 83771639, now seen corresponding path program 221 times [2021-06-05 21:07:58,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:07:58,778 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425651455] [2021-06-05 21:07:58,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:07:58,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:07:58,840 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 65 proven. 68 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:07:58,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:07:58,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425651455] [2021-06-05 21:07:58,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425651455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:58,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742357164] [2021-06-05 21:07:58,840 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:07:58,868 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 21:07:58,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:07:58,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:07:58,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:07:58,986 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 68 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:07:58,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742357164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:58,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:07:58,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 13 [2021-06-05 21:07:58,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175837658] [2021-06-05 21:07:58,987 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:07:58,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:07:58,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:07:58,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:07:58,988 INFO L87 Difference]: Start difference. First operand 11650 states and 30710 transitions. Second operand has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:59,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:07:59,211 INFO L93 Difference]: Finished difference Result 14037 states and 35373 transitions. [2021-06-05 21:07:59,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:07:59,212 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 21:07:59,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:07:59,229 INFO L225 Difference]: With dead ends: 14037 [2021-06-05 21:07:59,229 INFO L226 Difference]: Without dead ends: 14025 [2021-06-05 21:07:59,229 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 87.8ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:07:59,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14025 states. [2021-06-05 21:07:59,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14025 to 11650. [2021-06-05 21:07:59,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11650 states, 11649 states have (on average 2.636020259249721) internal successors, (30707), 11649 states have internal predecessors, (30707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:59,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11650 states to 11650 states and 30707 transitions. [2021-06-05 21:07:59,401 INFO L78 Accepts]: Start accepts. Automaton has 11650 states and 30707 transitions. Word has length 53 [2021-06-05 21:07:59,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:07:59,401 INFO L482 AbstractCegarLoop]: Abstraction has 11650 states and 30707 transitions. [2021-06-05 21:07:59,401 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:59,401 INFO L276 IsEmpty]: Start isEmpty. Operand 11650 states and 30707 transitions. [2021-06-05 21:07:59,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 21:07:59,409 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:07:59,409 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:07:59,609 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 380 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable783 [2021-06-05 21:07:59,609 INFO L430 AbstractCegarLoop]: === Iteration 389 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:07:59,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:07:59,609 INFO L82 PathProgramCache]: Analyzing trace with hash -1364228374, now seen corresponding path program 222 times [2021-06-05 21:07:59,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:07:59,610 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717652223] [2021-06-05 21:07:59,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:07:59,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:07:59,697 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 17 proven. 115 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:07:59,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:07:59,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717652223] [2021-06-05 21:07:59,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717652223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:59,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165235697] [2021-06-05 21:07:59,697 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:07:59,743 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 21:07:59,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:07:59,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 21:07:59,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:07:59,848 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 119 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:07:59,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165235697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:59,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:07:59,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 21:07:59,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973958714] [2021-06-05 21:07:59,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:07:59,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:07:59,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:07:59,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:07:59,849 INFO L87 Difference]: Start difference. First operand 11650 states and 30707 transitions. Second operand has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:00,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:08:00,429 INFO L93 Difference]: Finished difference Result 12517 states and 32320 transitions. [2021-06-05 21:08:00,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:08:00,429 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 21:08:00,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:08:00,444 INFO L225 Difference]: With dead ends: 12517 [2021-06-05 21:08:00,445 INFO L226 Difference]: Without dead ends: 12384 [2021-06-05 21:08:00,445 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 137.1ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:08:00,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12384 states. [2021-06-05 21:08:00,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12384 to 11825. [2021-06-05 21:08:00,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11825 states, 11824 states have (on average 2.6268606224627877) internal successors, (31060), 11824 states have internal predecessors, (31060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:00,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11825 states to 11825 states and 31060 transitions. [2021-06-05 21:08:00,674 INFO L78 Accepts]: Start accepts. Automaton has 11825 states and 31060 transitions. Word has length 53 [2021-06-05 21:08:00,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:08:00,674 INFO L482 AbstractCegarLoop]: Abstraction has 11825 states and 31060 transitions. [2021-06-05 21:08:00,674 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:00,674 INFO L276 IsEmpty]: Start isEmpty. Operand 11825 states and 31060 transitions. [2021-06-05 21:08:00,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 21:08:00,682 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:08:00,682 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:08:00,882 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 381 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable786 [2021-06-05 21:08:00,883 INFO L430 AbstractCegarLoop]: === Iteration 390 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:08:00,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:08:00,883 INFO L82 PathProgramCache]: Analyzing trace with hash -1977764554, now seen corresponding path program 223 times [2021-06-05 21:08:00,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:08:00,883 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198059107] [2021-06-05 21:08:00,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:08:00,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:08:00,962 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 116 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:08:00,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:08:00,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198059107] [2021-06-05 21:08:00,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198059107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:08:00,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362847864] [2021-06-05 21:08:00,962 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:08:00,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:08:00,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 21:08:00,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:08:01,065 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 117 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:08:01,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362847864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:08:01,065 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:08:01,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 21:08:01,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565657278] [2021-06-05 21:08:01,066 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:08:01,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:08:01,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:08:01,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:08:01,066 INFO L87 Difference]: Start difference. First operand 11825 states and 31060 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:01,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:08:01,463 INFO L93 Difference]: Finished difference Result 12581 states and 32513 transitions. [2021-06-05 21:08:01,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:08:01,463 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 21:08:01,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:08:01,478 INFO L225 Difference]: With dead ends: 12581 [2021-06-05 21:08:01,478 INFO L226 Difference]: Without dead ends: 12569 [2021-06-05 21:08:01,478 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 122.2ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:08:01,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12569 states. [2021-06-05 21:08:01,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12569 to 11827. [2021-06-05 21:08:01,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11827 states, 11826 states have (on average 2.6267546084897684) internal successors, (31064), 11826 states have internal predecessors, (31064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:01,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11827 states to 11827 states and 31064 transitions. [2021-06-05 21:08:01,639 INFO L78 Accepts]: Start accepts. Automaton has 11827 states and 31064 transitions. Word has length 53 [2021-06-05 21:08:01,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:08:01,639 INFO L482 AbstractCegarLoop]: Abstraction has 11827 states and 31064 transitions. [2021-06-05 21:08:01,639 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:01,639 INFO L276 IsEmpty]: Start isEmpty. Operand 11827 states and 31064 transitions. [2021-06-05 21:08:01,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 21:08:01,646 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:08:01,646 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:08:01,846 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable787,382 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:08:01,847 INFO L430 AbstractCegarLoop]: === Iteration 391 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:08:01,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:08:01,847 INFO L82 PathProgramCache]: Analyzing trace with hash 164152780, now seen corresponding path program 224 times [2021-06-05 21:08:01,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:08:01,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746751346] [2021-06-05 21:08:01,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:08:01,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:08:01,924 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 117 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:08:01,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:08:01,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746751346] [2021-06-05 21:08:01,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746751346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:08:01,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117349280] [2021-06-05 21:08:01,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:08:01,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:08:01,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:08:01,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 21:08:01,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:08:02,029 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 118 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:08:02,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117349280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:08:02,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:08:02,030 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 21:08:02,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836247186] [2021-06-05 21:08:02,030 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:08:02,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:08:02,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:08:02,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:08:02,030 INFO L87 Difference]: Start difference. First operand 11827 states and 31064 transitions. Second operand has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:02,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:08:02,662 INFO L93 Difference]: Finished difference Result 13836 states and 35142 transitions. [2021-06-05 21:08:02,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 21:08:02,662 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 21:08:02,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:08:02,678 INFO L225 Difference]: With dead ends: 13836 [2021-06-05 21:08:02,678 INFO L226 Difference]: Without dead ends: 13782 [2021-06-05 21:08:02,679 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 235.4ms TimeCoverageRelationStatistics Valid=123, Invalid=807, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:08:02,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13782 states. [2021-06-05 21:08:02,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13782 to 11958. [2021-06-05 21:08:02,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11958 states, 11957 states have (on average 2.6264113071840764) internal successors, (31404), 11957 states have internal predecessors, (31404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:02,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11958 states to 11958 states and 31404 transitions. [2021-06-05 21:08:02,843 INFO L78 Accepts]: Start accepts. Automaton has 11958 states and 31404 transitions. Word has length 53 [2021-06-05 21:08:02,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:08:02,844 INFO L482 AbstractCegarLoop]: Abstraction has 11958 states and 31404 transitions. [2021-06-05 21:08:02,844 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:02,844 INFO L276 IsEmpty]: Start isEmpty. Operand 11958 states and 31404 transitions. [2021-06-05 21:08:02,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 21:08:02,851 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:08:02,851 INFO L554 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:08:03,051 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 383 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable788 [2021-06-05 21:08:03,051 INFO L430 AbstractCegarLoop]: === Iteration 392 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:08:03,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:08:03,052 INFO L82 PathProgramCache]: Analyzing trace with hash 1696711889, now seen corresponding path program 225 times [2021-06-05 21:08:03,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:08:03,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578387022] [2021-06-05 21:08:03,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:08:03,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:08:03,121 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 51 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:08:03,122 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:08:03,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578387022] [2021-06-05 21:08:03,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578387022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:08:03,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843522027] [2021-06-05 21:08:03,122 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:08:03,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 21:08:03,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:08:03,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:08:03,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:08:03,231 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 51 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:08:03,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843522027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:08:03,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:08:03,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 21:08:03,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903783366] [2021-06-05 21:08:03,232 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:08:03,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:08:03,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:08:03,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:08:03,232 INFO L87 Difference]: Start difference. First operand 11958 states and 31404 transitions. Second operand has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:03,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:08:03,398 INFO L93 Difference]: Finished difference Result 14190 states and 35732 transitions. [2021-06-05 21:08:03,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:08:03,399 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 21:08:03,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:08:03,416 INFO L225 Difference]: With dead ends: 14190 [2021-06-05 21:08:03,416 INFO L226 Difference]: Without dead ends: 14172 [2021-06-05 21:08:03,416 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 72.9ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:08:03,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14172 states. [2021-06-05 21:08:03,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14172 to 12156. [2021-06-05 21:08:03,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12156 states, 12155 states have (on average 2.6338955162484576) internal successors, (32015), 12155 states have internal predecessors, (32015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:03,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12156 states to 12156 states and 32015 transitions. [2021-06-05 21:08:03,577 INFO L78 Accepts]: Start accepts. Automaton has 12156 states and 32015 transitions. Word has length 53 [2021-06-05 21:08:03,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:08:03,577 INFO L482 AbstractCegarLoop]: Abstraction has 12156 states and 32015 transitions. [2021-06-05 21:08:03,578 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:03,578 INFO L276 IsEmpty]: Start isEmpty. Operand 12156 states and 32015 transitions. [2021-06-05 21:08:03,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 21:08:03,585 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:08:03,585 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:08:03,785 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 384 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable789 [2021-06-05 21:08:03,785 INFO L430 AbstractCegarLoop]: === Iteration 393 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:08:03,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:08:03,786 INFO L82 PathProgramCache]: Analyzing trace with hash 318989314, now seen corresponding path program 226 times [2021-06-05 21:08:03,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:08:03,786 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212919786] [2021-06-05 21:08:03,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:08:03,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:08:03,871 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 117 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:08:03,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:08:03,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212919786] [2021-06-05 21:08:03,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212919786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:08:03,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052322868] [2021-06-05 21:08:03,872 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:08:03,899 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:08:03,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:08:03,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 21:08:03,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:08:04,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:08:04,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2021-06-05 21:08:04,007 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:08:04,009 INFO L628 ElimStorePlain]: treesize reduction 20, result has 4.8 percent of original size [2021-06-05 21:08:04,009 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-06-05 21:08:04,009 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:08:04,009 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:1 [2021-06-05 21:08:04,015 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 18 proven. 114 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:08:04,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052322868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:08:04,016 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:08:04,016 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 15 [2021-06-05 21:08:04,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891466434] [2021-06-05 21:08:04,016 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:08:04,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:08:04,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:08:04,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:08:04,016 INFO L87 Difference]: Start difference. First operand 12156 states and 32015 transitions. Second operand has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:05,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:08:05,144 INFO L93 Difference]: Finished difference Result 16988 states and 42019 transitions. [2021-06-05 21:08:05,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 21:08:05,144 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 21:08:05,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:08:05,164 INFO L225 Difference]: With dead ends: 16988 [2021-06-05 21:08:05,164 INFO L226 Difference]: Without dead ends: 16820 [2021-06-05 21:08:05,164 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 898 ImplicationChecksByTransitivity, 490.4ms TimeCoverageRelationStatistics Valid=321, Invalid=2649, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 21:08:05,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16820 states. [2021-06-05 21:08:05,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16820 to 12541. [2021-06-05 21:08:05,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12541 states, 12540 states have (on average 2.6271132376395534) internal successors, (32944), 12540 states have internal predecessors, (32944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:05,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12541 states to 12541 states and 32944 transitions. [2021-06-05 21:08:05,369 INFO L78 Accepts]: Start accepts. Automaton has 12541 states and 32944 transitions. Word has length 53 [2021-06-05 21:08:05,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:08:05,369 INFO L482 AbstractCegarLoop]: Abstraction has 12541 states and 32944 transitions. [2021-06-05 21:08:05,369 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:05,369 INFO L276 IsEmpty]: Start isEmpty. Operand 12541 states and 32944 transitions. [2021-06-05 21:08:05,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 21:08:05,377 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:08:05,377 INFO L554 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:08:05,577 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable793,385 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:08:05,577 INFO L430 AbstractCegarLoop]: === Iteration 394 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:08:05,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:08:05,577 INFO L82 PathProgramCache]: Analyzing trace with hash 705591991, now seen corresponding path program 227 times [2021-06-05 21:08:05,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:08:05,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785753278] [2021-06-05 21:08:05,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:08:05,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:08:05,657 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 43 proven. 92 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:08:05,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:08:05,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785753278] [2021-06-05 21:08:05,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785753278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:08:05,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713474992] [2021-06-05 21:08:05,657 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:08:05,686 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 21:08:05,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:08:05,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:08:05,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:08:05,783 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 44 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:08:05,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713474992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:08:05,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:08:05,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 15 [2021-06-05 21:08:05,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002331839] [2021-06-05 21:08:05,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:08:05,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:08:05,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:08:05,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:08:05,783 INFO L87 Difference]: Start difference. First operand 12541 states and 32944 transitions. Second operand has 16 states, 16 states have (on average 4.0625) internal successors, (65), 15 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:06,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:08:06,020 INFO L93 Difference]: Finished difference Result 14864 states and 37234 transitions. [2021-06-05 21:08:06,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:08:06,021 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.0625) internal successors, (65), 15 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 21:08:06,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:08:06,038 INFO L225 Difference]: With dead ends: 14864 [2021-06-05 21:08:06,039 INFO L226 Difference]: Without dead ends: 14837 [2021-06-05 21:08:06,039 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 115.7ms TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:08:06,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14837 states. [2021-06-05 21:08:06,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14837 to 12541. [2021-06-05 21:08:06,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12541 states, 12540 states have (on average 2.626874003189793) internal successors, (32941), 12540 states have internal predecessors, (32941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:06,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12541 states to 12541 states and 32941 transitions. [2021-06-05 21:08:06,233 INFO L78 Accepts]: Start accepts. Automaton has 12541 states and 32941 transitions. Word has length 53 [2021-06-05 21:08:06,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:08:06,233 INFO L482 AbstractCegarLoop]: Abstraction has 12541 states and 32941 transitions. [2021-06-05 21:08:06,233 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.0625) internal successors, (65), 15 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:06,233 INFO L276 IsEmpty]: Start isEmpty. Operand 12541 states and 32941 transitions. [2021-06-05 21:08:06,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 21:08:06,241 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:08:06,241 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:08:06,441 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 386 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable794 [2021-06-05 21:08:06,441 INFO L430 AbstractCegarLoop]: === Iteration 395 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:08:06,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:08:06,442 INFO L82 PathProgramCache]: Analyzing trace with hash 259297804, now seen corresponding path program 228 times [2021-06-05 21:08:06,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:08:06,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161794868] [2021-06-05 21:08:06,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:08:06,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:08:06,555 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 117 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:08:06,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:08:06,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161794868] [2021-06-05 21:08:06,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161794868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:08:06,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824448975] [2021-06-05 21:08:06,556 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:08:06,591 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 21:08:06,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:08:06,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 21:08:06,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:08:06,666 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 118 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:08:06,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824448975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:08:06,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:08:06,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 21:08:06,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105749640] [2021-06-05 21:08:06,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:08:06,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:08:06,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:08:06,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:08:06,667 INFO L87 Difference]: Start difference. First operand 12541 states and 32941 transitions. Second operand has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:08,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:08:08,335 INFO L93 Difference]: Finished difference Result 23524 states and 56000 transitions. [2021-06-05 21:08:08,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-06-05 21:08:08,335 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 21:08:08,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:08:08,413 INFO L225 Difference]: With dead ends: 23524 [2021-06-05 21:08:08,413 INFO L226 Difference]: Without dead ends: 23068 [2021-06-05 21:08:08,413 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3318 ImplicationChecksByTransitivity, 1036.8ms TimeCoverageRelationStatistics Valid=807, Invalid=8123, Unknown=0, NotChecked=0, Total=8930 [2021-06-05 21:08:08,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23068 states. [2021-06-05 21:08:08,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23068 to 13305. [2021-06-05 21:08:08,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13305 states, 13304 states have (on average 2.6126728803367407) internal successors, (34759), 13304 states have internal predecessors, (34759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:08,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13305 states to 13305 states and 34759 transitions. [2021-06-05 21:08:08,622 INFO L78 Accepts]: Start accepts. Automaton has 13305 states and 34759 transitions. Word has length 53 [2021-06-05 21:08:08,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:08:08,622 INFO L482 AbstractCegarLoop]: Abstraction has 13305 states and 34759 transitions. [2021-06-05 21:08:08,622 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:08,622 INFO L276 IsEmpty]: Start isEmpty. Operand 13305 states and 34759 transitions. [2021-06-05 21:08:08,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 21:08:08,630 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:08:08,630 INFO L554 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:08:08,830 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable799,387 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:08:08,830 INFO L430 AbstractCegarLoop]: === Iteration 396 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:08:08,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:08:08,830 INFO L82 PathProgramCache]: Analyzing trace with hash -2142096623, now seen corresponding path program 229 times [2021-06-05 21:08:08,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:08:08,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978476940] [2021-06-05 21:08:08,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:08:08,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:08:08,924 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 41 proven. 94 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:08:08,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:08:08,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978476940] [2021-06-05 21:08:08,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978476940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:08:08,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284843047] [2021-06-05 21:08:08,925 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:08:08,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:08:08,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:08:08,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:08:09,026 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 41 proven. 94 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:08:09,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284843047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:08:09,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:08:09,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-06-05 21:08:09,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975828583] [2021-06-05 21:08:09,026 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:08:09,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:08:09,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:08:09,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:08:09,027 INFO L87 Difference]: Start difference. First operand 13305 states and 34759 transitions. Second operand has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:09,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:08:09,238 INFO L93 Difference]: Finished difference Result 15631 states and 39032 transitions. [2021-06-05 21:08:09,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:08:09,239 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 21:08:09,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:08:09,255 INFO L225 Difference]: With dead ends: 15631 [2021-06-05 21:08:09,255 INFO L226 Difference]: Without dead ends: 15595 [2021-06-05 21:08:09,255 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 112.0ms TimeCoverageRelationStatistics Valid=102, Invalid=204, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:08:09,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15595 states. [2021-06-05 21:08:09,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15595 to 13305. [2021-06-05 21:08:09,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13305 states, 13304 states have (on average 2.61244738424534) internal successors, (34756), 13304 states have internal predecessors, (34756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:09,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13305 states to 13305 states and 34756 transitions. [2021-06-05 21:08:09,449 INFO L78 Accepts]: Start accepts. Automaton has 13305 states and 34756 transitions. Word has length 53 [2021-06-05 21:08:09,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:08:09,449 INFO L482 AbstractCegarLoop]: Abstraction has 13305 states and 34756 transitions. [2021-06-05 21:08:09,449 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:09,450 INFO L276 IsEmpty]: Start isEmpty. Operand 13305 states and 34756 transitions. [2021-06-05 21:08:09,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 21:08:09,457 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:08:09,457 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:08:09,657 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 388 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable800 [2021-06-05 21:08:09,658 INFO L430 AbstractCegarLoop]: === Iteration 397 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:08:09,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:08:09,658 INFO L82 PathProgramCache]: Analyzing trace with hash 105983938, now seen corresponding path program 230 times [2021-06-05 21:08:09,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:08:09,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939031651] [2021-06-05 21:08:09,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:08:09,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:08:09,766 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 117 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:08:09,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:08:09,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939031651] [2021-06-05 21:08:09,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939031651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:08:09,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052932083] [2021-06-05 21:08:09,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:08:09,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:08:09,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:08:09,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 21:08:09,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:08:09,867 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 118 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:08:09,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052932083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:08:09,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:08:09,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:08:09,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520973508] [2021-06-05 21:08:09,868 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:08:09,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:08:09,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:08:09,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:08:09,868 INFO L87 Difference]: Start difference. First operand 13305 states and 34756 transitions. Second operand has 15 states, 15 states have (on average 3.6) internal successors, (54), 14 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:12,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:08:12,671 INFO L93 Difference]: Finished difference Result 39717 states and 90677 transitions. [2021-06-05 21:08:12,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 159 states. [2021-06-05 21:08:12,671 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 14 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 21:08:12,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:08:12,711 INFO L225 Difference]: With dead ends: 39717 [2021-06-05 21:08:12,711 INFO L226 Difference]: Without dead ends: 38331 [2021-06-05 21:08:12,712 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10453 ImplicationChecksByTransitivity, 2052.1ms TimeCoverageRelationStatistics Valid=1941, Invalid=23181, Unknown=0, NotChecked=0, Total=25122 [2021-06-05 21:08:12,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38331 states. [2021-06-05 21:08:12,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38331 to 14578. [2021-06-05 21:08:12,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14578 states, 14577 states have (on average 2.592371544213487) internal successors, (37789), 14577 states have internal predecessors, (37789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:13,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14578 states to 14578 states and 37789 transitions. [2021-06-05 21:08:13,021 INFO L78 Accepts]: Start accepts. Automaton has 14578 states and 37789 transitions. Word has length 53 [2021-06-05 21:08:13,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:08:13,021 INFO L482 AbstractCegarLoop]: Abstraction has 14578 states and 37789 transitions. [2021-06-05 21:08:13,021 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 14 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:13,021 INFO L276 IsEmpty]: Start isEmpty. Operand 14578 states and 37789 transitions. [2021-06-05 21:08:13,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 21:08:13,029 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:08:13,029 INFO L554 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:08:13,230 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable806,389 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:08:13,230 INFO L430 AbstractCegarLoop]: === Iteration 398 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:08:13,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:08:13,230 INFO L82 PathProgramCache]: Analyzing trace with hash 855401591, now seen corresponding path program 231 times [2021-06-05 21:08:13,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:08:13,230 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128949219] [2021-06-05 21:08:13,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:08:13,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:08:13,339 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 45 proven. 90 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:08:13,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:08:13,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128949219] [2021-06-05 21:08:13,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128949219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:08:13,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528101514] [2021-06-05 21:08:13,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:08:13,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 21:08:13,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:08:13,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:08:13,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:08:13,445 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 45 proven. 90 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:08:13,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528101514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:08:13,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:08:13,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-05 21:08:13,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058678953] [2021-06-05 21:08:13,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:08:13,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:08:13,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:08:13,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:08:13,446 INFO L87 Difference]: Start difference. First operand 14578 states and 37789 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:13,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:08:13,672 INFO L93 Difference]: Finished difference Result 17260 states and 42750 transitions. [2021-06-05 21:08:13,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:08:13,672 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 21:08:13,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:08:13,690 INFO L225 Difference]: With dead ends: 17260 [2021-06-05 21:08:13,690 INFO L226 Difference]: Without dead ends: 17215 [2021-06-05 21:08:13,690 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 136.7ms TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:08:13,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17215 states. [2021-06-05 21:08:13,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17215 to 14578. [2021-06-05 21:08:13,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14578 states, 14577 states have (on average 2.5921657405501817) internal successors, (37786), 14577 states have internal predecessors, (37786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:13,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14578 states to 14578 states and 37786 transitions. [2021-06-05 21:08:13,897 INFO L78 Accepts]: Start accepts. Automaton has 14578 states and 37786 transitions. Word has length 53 [2021-06-05 21:08:13,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:08:13,897 INFO L482 AbstractCegarLoop]: Abstraction has 14578 states and 37786 transitions. [2021-06-05 21:08:13,897 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:13,897 INFO L276 IsEmpty]: Start isEmpty. Operand 14578 states and 37786 transitions. [2021-06-05 21:08:13,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 21:08:13,905 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:08:13,905 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:08:14,106 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 390 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable807 [2021-06-05 21:08:14,106 INFO L430 AbstractCegarLoop]: === Iteration 399 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:08:14,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:08:14,106 INFO L82 PathProgramCache]: Analyzing trace with hash -1717162420, now seen corresponding path program 232 times [2021-06-05 21:08:14,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:08:14,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12925165] [2021-06-05 21:08:14,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:08:14,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:08:14,225 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 117 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:08:14,225 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:08:14,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12925165] [2021-06-05 21:08:14,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12925165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:08:14,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020396611] [2021-06-05 21:08:14,225 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:08:14,252 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:08:14,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:08:14,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 21:08:14,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:08:14,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:08:14,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2021-06-05 21:08:14,417 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:08:14,418 INFO L628 ElimStorePlain]: treesize reduction 20, result has 4.8 percent of original size [2021-06-05 21:08:14,419 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-06-05 21:08:14,419 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:08:14,419 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:1 [2021-06-05 21:08:14,425 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 18 proven. 114 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:08:14,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020396611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:08:14,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:08:14,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2021-06-05 21:08:14,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159474585] [2021-06-05 21:08:14,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:08:14,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:08:14,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:08:14,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:08:14,426 INFO L87 Difference]: Start difference. First operand 14578 states and 37786 transitions. Second operand has 22 states, 22 states have (on average 3.090909090909091) internal successors, (68), 21 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:19,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:08:19,342 INFO L93 Difference]: Finished difference Result 44078 states and 101715 transitions. [2021-06-05 21:08:19,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 255 states. [2021-06-05 21:08:19,342 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.090909090909091) internal successors, (68), 21 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 21:08:19,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:08:19,397 INFO L225 Difference]: With dead ends: 44078 [2021-06-05 21:08:19,397 INFO L226 Difference]: Without dead ends: 42758 [2021-06-05 21:08:19,403 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 253 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28740 ImplicationChecksByTransitivity, 3936.2ms TimeCoverageRelationStatistics Valid=4371, Invalid=60399, Unknown=0, NotChecked=0, Total=64770 [2021-06-05 21:08:19,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42758 states. [2021-06-05 21:08:19,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42758 to 16260. [2021-06-05 21:08:19,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16260 states, 16259 states have (on average 2.578448859093425) internal successors, (41923), 16259 states have internal predecessors, (41923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:19,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16260 states to 16260 states and 41923 transitions. [2021-06-05 21:08:19,776 INFO L78 Accepts]: Start accepts. Automaton has 16260 states and 41923 transitions. Word has length 53 [2021-06-05 21:08:19,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:08:19,776 INFO L482 AbstractCegarLoop]: Abstraction has 16260 states and 41923 transitions. [2021-06-05 21:08:19,777 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.090909090909091) internal successors, (68), 21 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:19,777 INFO L276 IsEmpty]: Start isEmpty. Operand 16260 states and 41923 transitions. [2021-06-05 21:08:19,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 21:08:19,786 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:08:19,786 INFO L554 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:08:19,986 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable814,391 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:08:19,986 INFO L430 AbstractCegarLoop]: === Iteration 400 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:08:19,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:08:19,986 INFO L82 PathProgramCache]: Analyzing trace with hash -1635323567, now seen corresponding path program 233 times [2021-06-05 21:08:19,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:08:19,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914868030] [2021-06-05 21:08:19,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:08:19,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:08:20,175 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 55 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:08:20,175 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:08:20,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914868030] [2021-06-05 21:08:20,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914868030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:08:20,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840099491] [2021-06-05 21:08:20,175 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:08:20,204 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 21:08:20,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:08:20,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:08:20,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:08:20,315 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 55 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:08:20,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840099491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:08:20,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:08:20,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 18 [2021-06-05 21:08:20,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134896285] [2021-06-05 21:08:20,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:08:20,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:08:20,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:08:20,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:08:20,316 INFO L87 Difference]: Start difference. First operand 16260 states and 41923 transitions. Second operand has 19 states, 19 states have (on average 3.4210526315789473) internal successors, (65), 18 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:20,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:08:20,737 INFO L93 Difference]: Finished difference Result 19781 states and 48513 transitions. [2021-06-05 21:08:20,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:08:20,738 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.4210526315789473) internal successors, (65), 18 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 21:08:20,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:08:20,759 INFO L225 Difference]: With dead ends: 19781 [2021-06-05 21:08:20,760 INFO L226 Difference]: Without dead ends: 19727 [2021-06-05 21:08:20,760 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 275.1ms TimeCoverageRelationStatistics Valid=167, Invalid=433, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:08:20,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19727 states. [2021-06-05 21:08:20,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19727 to 16260. [2021-06-05 21:08:20,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16260 states, 16259 states have (on average 2.578264345900732) internal successors, (41920), 16259 states have internal predecessors, (41920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:20,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16260 states to 16260 states and 41920 transitions. [2021-06-05 21:08:20,986 INFO L78 Accepts]: Start accepts. Automaton has 16260 states and 41920 transitions. Word has length 53 [2021-06-05 21:08:20,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:08:20,986 INFO L482 AbstractCegarLoop]: Abstraction has 16260 states and 41920 transitions. [2021-06-05 21:08:20,986 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.4210526315789473) internal successors, (65), 18 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:20,986 INFO L276 IsEmpty]: Start isEmpty. Operand 16260 states and 41920 transitions. [2021-06-05 21:08:20,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 21:08:20,995 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:08:20,995 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:08:21,195 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 392 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable815 [2021-06-05 21:08:21,195 INFO L430 AbstractCegarLoop]: === Iteration 401 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:08:21,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:08:21,195 INFO L82 PathProgramCache]: Analyzing trace with hash -913888382, now seen corresponding path program 234 times [2021-06-05 21:08:21,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:08:21,195 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458523365] [2021-06-05 21:08:21,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:08:21,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:08:21,328 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:08:21,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:08:21,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458523365] [2021-06-05 21:08:21,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458523365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:08:21,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372280869] [2021-06-05 21:08:21,328 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:08:21,357 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 21:08:21,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:08:21,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 21:08:21,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:08:21,429 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:08:21,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372280869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:08:21,429 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:08:21,429 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-06-05 21:08:21,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588471102] [2021-06-05 21:08:21,429 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:08:21,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:08:21,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:08:21,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:08:21,430 INFO L87 Difference]: Start difference. First operand 16260 states and 41920 transitions. Second operand has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:22,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:08:22,115 INFO L93 Difference]: Finished difference Result 21764 states and 52143 transitions. [2021-06-05 21:08:22,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:08:22,115 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 21:08:22,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:08:22,135 INFO L225 Difference]: With dead ends: 21764 [2021-06-05 21:08:22,135 INFO L226 Difference]: Without dead ends: 19982 [2021-06-05 21:08:22,135 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 384.4ms TimeCoverageRelationStatistics Valid=218, Invalid=1042, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 21:08:22,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19982 states. [2021-06-05 21:08:22,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19982 to 11673. [2021-06-05 21:08:22,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11673 states, 11672 states have (on average 2.643762851267992) internal successors, (30858), 11672 states have internal predecessors, (30858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:22,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11673 states to 11673 states and 30858 transitions. [2021-06-05 21:08:22,316 INFO L78 Accepts]: Start accepts. Automaton has 11673 states and 30858 transitions. Word has length 53 [2021-06-05 21:08:22,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:08:22,316 INFO L482 AbstractCegarLoop]: Abstraction has 11673 states and 30858 transitions. [2021-06-05 21:08:22,316 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:22,316 INFO L276 IsEmpty]: Start isEmpty. Operand 11673 states and 30858 transitions. [2021-06-05 21:08:22,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 21:08:22,322 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:08:22,322 INFO L554 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:08:22,523 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable823,393 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:08:22,523 INFO L430 AbstractCegarLoop]: === Iteration 402 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:08:22,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:08:22,523 INFO L82 PathProgramCache]: Analyzing trace with hash -1151949899, now seen corresponding path program 109 times [2021-06-05 21:08:22,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:08:22,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436552732] [2021-06-05 21:08:22,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:08:22,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:08:22,594 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 89 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:08:22,594 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:08:22,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436552732] [2021-06-05 21:08:22,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436552732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:08:22,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786961249] [2021-06-05 21:08:22,594 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:08:22,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:08:22,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:08:22,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:08:22,707 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 90 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:08:22,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786961249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:08:22,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:08:22,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 12 [2021-06-05 21:08:22,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881164017] [2021-06-05 21:08:22,708 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:08:22,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:08:22,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:08:22,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:08:22,708 INFO L87 Difference]: Start difference. First operand 11673 states and 30858 transitions. Second operand has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:22,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:08:22,908 INFO L93 Difference]: Finished difference Result 13241 states and 34204 transitions. [2021-06-05 21:08:22,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:08:22,909 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 21:08:22,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:08:22,923 INFO L225 Difference]: With dead ends: 13241 [2021-06-05 21:08:22,923 INFO L226 Difference]: Without dead ends: 13227 [2021-06-05 21:08:22,924 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 90.2ms TimeCoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:08:22,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13227 states. [2021-06-05 21:08:23,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13227 to 12216. [2021-06-05 21:08:23,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12216 states, 12215 states have (on average 2.644617273843635) internal successors, (32304), 12215 states have internal predecessors, (32304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:23,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12216 states to 12216 states and 32304 transitions. [2021-06-05 21:08:23,081 INFO L78 Accepts]: Start accepts. Automaton has 12216 states and 32304 transitions. Word has length 53 [2021-06-05 21:08:23,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:08:23,081 INFO L482 AbstractCegarLoop]: Abstraction has 12216 states and 32304 transitions. [2021-06-05 21:08:23,081 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:23,081 INFO L276 IsEmpty]: Start isEmpty. Operand 12216 states and 32304 transitions. [2021-06-05 21:08:23,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 21:08:23,088 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:08:23,088 INFO L554 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:08:23,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable824,394 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:08:23,288 INFO L430 AbstractCegarLoop]: === Iteration 403 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:08:23,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:08:23,289 INFO L82 PathProgramCache]: Analyzing trace with hash -1773830309, now seen corresponding path program 110 times [2021-06-05 21:08:23,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:08:23,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667399255] [2021-06-05 21:08:23,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:08:23,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:08:23,353 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 89 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:08:23,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:08:23,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667399255] [2021-06-05 21:08:23,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667399255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:08:23,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943879438] [2021-06-05 21:08:23,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:08:23,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:08:23,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:08:23,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:08:23,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:08:23,458 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 89 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:08:23,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943879438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:08:23,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:08:23,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 11 [2021-06-05 21:08:23,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807171535] [2021-06-05 21:08:23,459 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:08:23,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:08:23,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:08:23,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:08:23,459 INFO L87 Difference]: Start difference. First operand 12216 states and 32304 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:23,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:08:23,731 INFO L93 Difference]: Finished difference Result 14309 states and 36490 transitions. [2021-06-05 21:08:23,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:08:23,731 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 21:08:23,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:08:23,746 INFO L225 Difference]: With dead ends: 14309 [2021-06-05 21:08:23,746 INFO L226 Difference]: Without dead ends: 14309 [2021-06-05 21:08:23,746 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 142.3ms TimeCoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:08:23,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14309 states. [2021-06-05 21:08:23,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14309 to 12222. [2021-06-05 21:08:23,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12222 states, 12221 states have (on average 2.6448735782669175) internal successors, (32323), 12221 states have internal predecessors, (32323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:23,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12222 states to 12222 states and 32323 transitions. [2021-06-05 21:08:23,919 INFO L78 Accepts]: Start accepts. Automaton has 12222 states and 32323 transitions. Word has length 53 [2021-06-05 21:08:23,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:08:23,919 INFO L482 AbstractCegarLoop]: Abstraction has 12222 states and 32323 transitions. [2021-06-05 21:08:23,919 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:23,919 INFO L276 IsEmpty]: Start isEmpty. Operand 12222 states and 32323 transitions. [2021-06-05 21:08:23,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 21:08:23,926 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:08:23,926 INFO L554 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:08:24,126 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable827,395 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:08:24,127 INFO L430 AbstractCegarLoop]: === Iteration 404 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:08:24,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:08:24,127 INFO L82 PathProgramCache]: Analyzing trace with hash 883564531, now seen corresponding path program 111 times [2021-06-05 21:08:24,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:08:24,127 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596850424] [2021-06-05 21:08:24,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:08:24,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:08:24,202 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 90 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:08:24,202 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:08:24,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596850424] [2021-06-05 21:08:24,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596850424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:08:24,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329554965] [2021-06-05 21:08:24,202 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:08:24,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 21:08:24,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:08:24,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:08:24,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:08:24,331 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 91 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:08:24,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329554965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:08:24,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:08:24,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 14 [2021-06-05 21:08:24,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650178027] [2021-06-05 21:08:24,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:08:24,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:08:24,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:08:24,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:08:24,331 INFO L87 Difference]: Start difference. First operand 12222 states and 32323 transitions. Second operand has 15 states, 15 states have (on average 4.066666666666666) internal successors, (61), 14 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:24,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:08:24,797 INFO L93 Difference]: Finished difference Result 13621 states and 34955 transitions. [2021-06-05 21:08:24,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 21:08:24,797 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.066666666666666) internal successors, (61), 14 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 21:08:24,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:08:24,814 INFO L225 Difference]: With dead ends: 13621 [2021-06-05 21:08:24,814 INFO L226 Difference]: Without dead ends: 13621 [2021-06-05 21:08:24,814 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 243.7ms TimeCoverageRelationStatistics Valid=324, Invalid=546, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:08:24,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13621 states. [2021-06-05 21:08:24,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13621 to 12015. [2021-06-05 21:08:24,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12015 states, 12014 states have (on average 2.647411353421009) internal successors, (31806), 12014 states have internal predecessors, (31806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:24,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12015 states to 12015 states and 31806 transitions. [2021-06-05 21:08:24,976 INFO L78 Accepts]: Start accepts. Automaton has 12015 states and 31806 transitions. Word has length 53 [2021-06-05 21:08:24,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:08:24,976 INFO L482 AbstractCegarLoop]: Abstraction has 12015 states and 31806 transitions. [2021-06-05 21:08:24,976 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.066666666666666) internal successors, (61), 14 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:24,976 INFO L276 IsEmpty]: Start isEmpty. Operand 12015 states and 31806 transitions. [2021-06-05 21:08:24,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 21:08:24,984 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:08:24,984 INFO L554 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:08:25,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable828,396 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:08:25,184 INFO L430 AbstractCegarLoop]: === Iteration 405 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:08:25,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:08:25,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1321467447, now seen corresponding path program 235 times [2021-06-05 21:08:25,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:08:25,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731733736] [2021-06-05 21:08:25,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:08:25,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:08:25,309 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 72 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:08:25,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:08:25,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731733736] [2021-06-05 21:08:25,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731733736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:08:25,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188900355] [2021-06-05 21:08:25,309 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:08:25,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:08:25,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:08:25,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:08:25,414 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 72 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:08:25,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188900355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:08:25,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:08:25,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2021-06-05 21:08:25,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439158768] [2021-06-05 21:08:25,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:08:25,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:08:25,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:08:25,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:08:25,415 INFO L87 Difference]: Start difference. First operand 12015 states and 31806 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:25,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:08:25,701 INFO L93 Difference]: Finished difference Result 13804 states and 35062 transitions. [2021-06-05 21:08:25,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:08:25,701 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 21:08:25,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:08:25,718 INFO L225 Difference]: With dead ends: 13804 [2021-06-05 21:08:25,718 INFO L226 Difference]: Without dead ends: 13739 [2021-06-05 21:08:25,718 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 176.9ms TimeCoverageRelationStatistics Valid=171, Invalid=381, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:08:25,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13739 states. [2021-06-05 21:08:25,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13739 to 12024. [2021-06-05 21:08:25,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12024 states, 12023 states have (on average 2.646594028112784) internal successors, (31820), 12023 states have internal predecessors, (31820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:25,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12024 states to 12024 states and 31820 transitions. [2021-06-05 21:08:25,878 INFO L78 Accepts]: Start accepts. Automaton has 12024 states and 31820 transitions. Word has length 53 [2021-06-05 21:08:25,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:08:25,878 INFO L482 AbstractCegarLoop]: Abstraction has 12024 states and 31820 transitions. [2021-06-05 21:08:25,878 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:25,878 INFO L276 IsEmpty]: Start isEmpty. Operand 12024 states and 31820 transitions. [2021-06-05 21:08:25,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 21:08:25,886 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:08:25,886 INFO L554 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:08:26,086 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 397 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable831 [2021-06-05 21:08:26,087 INFO L430 AbstractCegarLoop]: === Iteration 406 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:08:26,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:08:26,087 INFO L82 PathProgramCache]: Analyzing trace with hash -278189192, now seen corresponding path program 236 times [2021-06-05 21:08:26,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:08:26,087 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530276555] [2021-06-05 21:08:26,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:08:26,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:08:26,163 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:08:26,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:08:26,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530276555] [2021-06-05 21:08:26,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530276555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:08:26,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36950254] [2021-06-05 21:08:26,163 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:08:26,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:08:26,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:08:26,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:08:26,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:08:26,513 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 70 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:08:26,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36950254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:08:26,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:08:26,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 17] total 25 [2021-06-05 21:08:26,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601861581] [2021-06-05 21:08:26,513 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 21:08:26,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:08:26,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 21:08:26,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:08:26,514 INFO L87 Difference]: Start difference. First operand 12024 states and 31820 transitions. Second operand has 26 states, 26 states have (on average 4.269230769230769) internal successors, (111), 25 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:27,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:08:27,961 INFO L93 Difference]: Finished difference Result 15072 states and 37802 transitions. [2021-06-05 21:08:27,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 21:08:27,962 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.269230769230769) internal successors, (111), 25 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 21:08:27,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:08:27,978 INFO L225 Difference]: With dead ends: 15072 [2021-06-05 21:08:27,978 INFO L226 Difference]: Without dead ends: 15028 [2021-06-05 21:08:27,978 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 923 ImplicationChecksByTransitivity, 858.7ms TimeCoverageRelationStatistics Valid=786, Invalid=3246, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 21:08:27,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15028 states. [2021-06-05 21:08:28,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15028 to 12811. [2021-06-05 21:08:28,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12811 states, 12810 states have (on average 2.609992193598751) internal successors, (33434), 12810 states have internal predecessors, (33434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:28,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12811 states to 12811 states and 33434 transitions. [2021-06-05 21:08:28,162 INFO L78 Accepts]: Start accepts. Automaton has 12811 states and 33434 transitions. Word has length 56 [2021-06-05 21:08:28,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:08:28,162 INFO L482 AbstractCegarLoop]: Abstraction has 12811 states and 33434 transitions. [2021-06-05 21:08:28,162 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 4.269230769230769) internal successors, (111), 25 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:28,162 INFO L276 IsEmpty]: Start isEmpty. Operand 12811 states and 33434 transitions. [2021-06-05 21:08:28,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 21:08:28,170 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:08:28,170 INFO L554 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:08:28,370 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 398 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable840 [2021-06-05 21:08:28,370 INFO L430 AbstractCegarLoop]: === Iteration 407 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:08:28,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:08:28,370 INFO L82 PathProgramCache]: Analyzing trace with hash -1678028872, now seen corresponding path program 237 times [2021-06-05 21:08:28,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:08:28,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964405245] [2021-06-05 21:08:28,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:08:28,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:08:28,436 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 21:08:28,436 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:08:28,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964405245] [2021-06-05 21:08:28,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964405245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:08:28,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319896909] [2021-06-05 21:08:28,436 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:08:28,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-06-05 21:08:28,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:08:28,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:08:28,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:08:28,649 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 62 proven. 91 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:08:28,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319896909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:08:28,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:08:28,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2021-06-05 21:08:28,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488821915] [2021-06-05 21:08:28,650 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:08:28,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:08:28,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:08:28,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:08:28,650 INFO L87 Difference]: Start difference. First operand 12811 states and 33434 transitions. Second operand has 19 states, 19 states have (on average 5.684210526315789) internal successors, (108), 18 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:29,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:08:29,594 INFO L93 Difference]: Finished difference Result 16926 states and 41264 transitions. [2021-06-05 21:08:29,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 21:08:29,594 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.684210526315789) internal successors, (108), 18 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 21:08:29,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:08:29,613 INFO L225 Difference]: With dead ends: 16926 [2021-06-05 21:08:29,614 INFO L226 Difference]: Without dead ends: 16834 [2021-06-05 21:08:29,614 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 427.4ms TimeCoverageRelationStatistics Valid=323, Invalid=1483, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 21:08:29,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16834 states. [2021-06-05 21:08:29,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16834 to 12990. [2021-06-05 21:08:29,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12990 states, 12989 states have (on average 2.6092847794287475) internal successors, (33892), 12989 states have internal predecessors, (33892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:29,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12990 states to 12990 states and 33892 transitions. [2021-06-05 21:08:29,812 INFO L78 Accepts]: Start accepts. Automaton has 12990 states and 33892 transitions. Word has length 56 [2021-06-05 21:08:29,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:08:29,812 INFO L482 AbstractCegarLoop]: Abstraction has 12990 states and 33892 transitions. [2021-06-05 21:08:29,812 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.684210526315789) internal successors, (108), 18 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:29,812 INFO L276 IsEmpty]: Start isEmpty. Operand 12990 states and 33892 transitions. [2021-06-05 21:08:29,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 21:08:29,820 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:08:29,820 INFO L554 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:08:30,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 399 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable841 [2021-06-05 21:08:30,021 INFO L430 AbstractCegarLoop]: === Iteration 408 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:08:30,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:08:30,021 INFO L82 PathProgramCache]: Analyzing trace with hash 173585170, now seen corresponding path program 238 times [2021-06-05 21:08:30,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:08:30,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728698469] [2021-06-05 21:08:30,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:08:30,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:08:30,083 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 21:08:30,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:08:30,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728698469] [2021-06-05 21:08:30,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728698469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:08:30,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639818211] [2021-06-05 21:08:30,084 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:08:30,111 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:08:30,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:08:30,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:08:30,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:08:30,181 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 21:08:30,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639818211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:08:30,181 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:08:30,181 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 21:08:30,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012375472] [2021-06-05 21:08:30,181 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:08:30,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:08:30,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:08:30,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:08:30,181 INFO L87 Difference]: Start difference. First operand 12990 states and 33892 transitions. Second operand has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:30,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:08:30,505 INFO L93 Difference]: Finished difference Result 14078 states and 35927 transitions. [2021-06-05 21:08:30,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:08:30,505 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 21:08:30,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:08:30,520 INFO L225 Difference]: With dead ends: 14078 [2021-06-05 21:08:30,520 INFO L226 Difference]: Without dead ends: 14012 [2021-06-05 21:08:30,520 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 50.8ms TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:08:30,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14012 states. [2021-06-05 21:08:30,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14012 to 13057. [2021-06-05 21:08:30,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13057 states, 13056 states have (on average 2.604549632352941) internal successors, (34005), 13056 states have internal predecessors, (34005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:30,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13057 states to 13057 states and 34005 transitions. [2021-06-05 21:08:30,697 INFO L78 Accepts]: Start accepts. Automaton has 13057 states and 34005 transitions. Word has length 56 [2021-06-05 21:08:30,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:08:30,697 INFO L482 AbstractCegarLoop]: Abstraction has 13057 states and 34005 transitions. [2021-06-05 21:08:30,697 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:30,697 INFO L276 IsEmpty]: Start isEmpty. Operand 13057 states and 34005 transitions. [2021-06-05 21:08:30,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 21:08:30,705 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:08:30,705 INFO L554 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:08:30,905 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 400 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable842 [2021-06-05 21:08:30,905 INFO L430 AbstractCegarLoop]: === Iteration 409 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:08:30,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:08:30,906 INFO L82 PathProgramCache]: Analyzing trace with hash 1342527864, now seen corresponding path program 239 times [2021-06-05 21:08:30,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:08:30,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596142721] [2021-06-05 21:08:30,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:08:30,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:08:30,968 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 21:08:30,968 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:08:30,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596142721] [2021-06-05 21:08:30,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596142721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:08:30,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399765772] [2021-06-05 21:08:30,968 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:08:30,999 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-06-05 21:08:30,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:08:31,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:08:31,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:08:31,068 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 21:08:31,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399765772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:08:31,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:08:31,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 21:08:31,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068033219] [2021-06-05 21:08:31,069 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:08:31,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:08:31,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:08:31,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:08:31,069 INFO L87 Difference]: Start difference. First operand 13057 states and 34005 transitions. Second operand has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:31,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:08:31,418 INFO L93 Difference]: Finished difference Result 14112 states and 36011 transitions. [2021-06-05 21:08:31,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:08:31,418 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 21:08:31,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:08:31,433 INFO L225 Difference]: With dead ends: 14112 [2021-06-05 21:08:31,434 INFO L226 Difference]: Without dead ends: 14074 [2021-06-05 21:08:31,434 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 50.7ms TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:08:31,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14074 states. [2021-06-05 21:08:31,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14074 to 13111. [2021-06-05 21:08:31,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13111 states, 13110 states have (on average 2.6011441647597255) internal successors, (34101), 13110 states have internal predecessors, (34101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:31,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13111 states to 13111 states and 34101 transitions. [2021-06-05 21:08:31,608 INFO L78 Accepts]: Start accepts. Automaton has 13111 states and 34101 transitions. Word has length 56 [2021-06-05 21:08:31,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:08:31,608 INFO L482 AbstractCegarLoop]: Abstraction has 13111 states and 34101 transitions. [2021-06-05 21:08:31,608 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:31,608 INFO L276 IsEmpty]: Start isEmpty. Operand 13111 states and 34101 transitions. [2021-06-05 21:08:31,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 21:08:31,616 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:08:31,616 INFO L554 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:08:31,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable843,401 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:08:31,816 INFO L430 AbstractCegarLoop]: === Iteration 410 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:08:31,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:08:31,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1719488850, now seen corresponding path program 240 times [2021-06-05 21:08:31,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:08:31,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031720010] [2021-06-05 21:08:31,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:08:31,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:08:31,879 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 21:08:31,880 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:08:31,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031720010] [2021-06-05 21:08:31,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031720010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:08:31,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771528751] [2021-06-05 21:08:31,880 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:08:31,911 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-06-05 21:08:31,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:08:31,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:08:31,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:08:32,088 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 32 proven. 121 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:08:32,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771528751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:08:32,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:08:32,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2021-06-05 21:08:32,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469824995] [2021-06-05 21:08:32,089 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:08:32,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:08:32,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:08:32,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:08:32,089 INFO L87 Difference]: Start difference. First operand 13111 states and 34101 transitions. Second operand has 19 states, 19 states have (on average 5.684210526315789) internal successors, (108), 18 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:33,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:08:33,065 INFO L93 Difference]: Finished difference Result 18611 states and 44534 transitions. [2021-06-05 21:08:33,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 21:08:33,066 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.684210526315789) internal successors, (108), 18 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 21:08:33,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:08:33,086 INFO L225 Difference]: With dead ends: 18611 [2021-06-05 21:08:33,086 INFO L226 Difference]: Without dead ends: 18544 [2021-06-05 21:08:33,087 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 405.7ms TimeCoverageRelationStatistics Valid=323, Invalid=1483, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 21:08:33,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18544 states. [2021-06-05 21:08:33,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18544 to 13170. [2021-06-05 21:08:33,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13170 states, 13169 states have (on average 2.5990583947148607) internal successors, (34227), 13169 states have internal predecessors, (34227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:33,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13170 states to 13170 states and 34227 transitions. [2021-06-05 21:08:33,286 INFO L78 Accepts]: Start accepts. Automaton has 13170 states and 34227 transitions. Word has length 56 [2021-06-05 21:08:33,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:08:33,286 INFO L482 AbstractCegarLoop]: Abstraction has 13170 states and 34227 transitions. [2021-06-05 21:08:33,286 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.684210526315789) internal successors, (108), 18 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:33,286 INFO L276 IsEmpty]: Start isEmpty. Operand 13170 states and 34227 transitions. [2021-06-05 21:08:33,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 21:08:33,294 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:08:33,294 INFO L554 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:08:33,495 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 402 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable844 [2021-06-05 21:08:33,495 INFO L430 AbstractCegarLoop]: === Iteration 411 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:08:33,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:08:33,495 INFO L82 PathProgramCache]: Analyzing trace with hash 1774337938, now seen corresponding path program 241 times [2021-06-05 21:08:33,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:08:33,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364135769] [2021-06-05 21:08:33,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:08:33,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:08:33,566 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 21:08:33,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:08:33,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364135769] [2021-06-05 21:08:33,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364135769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:08:33,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509016718] [2021-06-05 21:08:33,567 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:08:33,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:08:33,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:08:33,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:08:33,661 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 21:08:33,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509016718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:08:33,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:08:33,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 21:08:33,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435061930] [2021-06-05 21:08:33,661 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:08:33,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:08:33,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:08:33,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:08:33,661 INFO L87 Difference]: Start difference. First operand 13170 states and 34227 transitions. Second operand has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:33,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:08:33,988 INFO L93 Difference]: Finished difference Result 14386 states and 36601 transitions. [2021-06-05 21:08:33,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:08:33,988 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 21:08:33,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:08:34,004 INFO L225 Difference]: With dead ends: 14386 [2021-06-05 21:08:34,004 INFO L226 Difference]: Without dead ends: 14350 [2021-06-05 21:08:34,004 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 51.9ms TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:08:34,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14350 states. [2021-06-05 21:08:34,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14350 to 13369. [2021-06-05 21:08:34,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13369 states, 13368 states have (on average 2.590065828845003) internal successors, (34624), 13368 states have internal predecessors, (34624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:34,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13369 states to 13369 states and 34624 transitions. [2021-06-05 21:08:34,182 INFO L78 Accepts]: Start accepts. Automaton has 13369 states and 34624 transitions. Word has length 56 [2021-06-05 21:08:34,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:08:34,182 INFO L482 AbstractCegarLoop]: Abstraction has 13369 states and 34624 transitions. [2021-06-05 21:08:34,182 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:34,182 INFO L276 IsEmpty]: Start isEmpty. Operand 13369 states and 34624 transitions. [2021-06-05 21:08:34,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 21:08:34,191 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:08:34,191 INFO L554 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:08:34,391 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable845,403 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:08:34,391 INFO L430 AbstractCegarLoop]: === Iteration 412 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:08:34,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:08:34,392 INFO L82 PathProgramCache]: Analyzing trace with hash -1948615432, now seen corresponding path program 242 times [2021-06-05 21:08:34,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:08:34,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893515431] [2021-06-05 21:08:34,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:08:34,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:08:34,454 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 150 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:08:34,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:08:34,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893515431] [2021-06-05 21:08:34,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893515431] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:08:34,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359390378] [2021-06-05 21:08:34,455 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:08:34,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:08:34,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:08:34,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:08:34,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:08:34,669 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 57 proven. 97 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:08:34,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359390378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:08:34,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:08:34,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2021-06-05 21:08:34,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71540635] [2021-06-05 21:08:34,669 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:08:34,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:08:34,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:08:34,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:08:34,670 INFO L87 Difference]: Start difference. First operand 13369 states and 34624 transitions. Second operand has 19 states, 19 states have (on average 5.7894736842105265) internal successors, (110), 18 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:35,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:08:35,721 INFO L93 Difference]: Finished difference Result 18830 states and 45148 transitions. [2021-06-05 21:08:35,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 21:08:35,721 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.7894736842105265) internal successors, (110), 18 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 21:08:35,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:08:35,744 INFO L225 Difference]: With dead ends: 18830 [2021-06-05 21:08:35,744 INFO L226 Difference]: Without dead ends: 18792 [2021-06-05 21:08:35,744 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 433.5ms TimeCoverageRelationStatistics Valid=323, Invalid=1483, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 21:08:35,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18792 states. [2021-06-05 21:08:35,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18792 to 14037. [2021-06-05 21:08:35,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14037 states, 14036 states have (on average 2.5893416927899686) internal successors, (36344), 14036 states have internal predecessors, (36344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:35,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14037 states to 14037 states and 36344 transitions. [2021-06-05 21:08:35,959 INFO L78 Accepts]: Start accepts. Automaton has 14037 states and 36344 transitions. Word has length 56 [2021-06-05 21:08:35,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:08:35,959 INFO L482 AbstractCegarLoop]: Abstraction has 14037 states and 36344 transitions. [2021-06-05 21:08:35,959 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.7894736842105265) internal successors, (110), 18 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:35,959 INFO L276 IsEmpty]: Start isEmpty. Operand 14037 states and 36344 transitions. [2021-06-05 21:08:35,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:08:35,969 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:08:35,969 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:08:36,169 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable846,404 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:08:36,169 INFO L430 AbstractCegarLoop]: === Iteration 413 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:08:36,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:08:36,169 INFO L82 PathProgramCache]: Analyzing trace with hash -848422539, now seen corresponding path program 112 times [2021-06-05 21:08:36,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:08:36,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106659672] [2021-06-05 21:08:36,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:08:36,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:08:36,328 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:08:36,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:08:36,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106659672] [2021-06-05 21:08:36,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106659672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:08:36,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146481280] [2021-06-05 21:08:36,328 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:08:36,354 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:08:36,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:08:36,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 21:08:36,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:08:36,435 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:08:36,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146481280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:08:36,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:08:36,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 18 [2021-06-05 21:08:36,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355287411] [2021-06-05 21:08:36,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:08:36,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:08:36,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:08:36,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:08:36,436 INFO L87 Difference]: Start difference. First operand 14037 states and 36344 transitions. Second operand has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 18 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:37,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:08:37,466 INFO L93 Difference]: Finished difference Result 17404 states and 43003 transitions. [2021-06-05 21:08:37,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 21:08:37,466 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 18 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:08:37,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:08:37,490 INFO L225 Difference]: With dead ends: 17404 [2021-06-05 21:08:37,490 INFO L226 Difference]: Without dead ends: 17123 [2021-06-05 21:08:37,491 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 485.7ms TimeCoverageRelationStatistics Valid=273, Invalid=1367, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 21:08:37,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17123 states. [2021-06-05 21:08:37,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17123 to 13513. [2021-06-05 21:08:37,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13513 states, 13512 states have (on average 2.5924363528715215) internal successors, (35029), 13512 states have internal predecessors, (35029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:37,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13513 states to 13513 states and 35029 transitions. [2021-06-05 21:08:37,690 INFO L78 Accepts]: Start accepts. Automaton has 13513 states and 35029 transitions. Word has length 59 [2021-06-05 21:08:37,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:08:37,690 INFO L482 AbstractCegarLoop]: Abstraction has 13513 states and 35029 transitions. [2021-06-05 21:08:37,690 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 18 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:37,690 INFO L276 IsEmpty]: Start isEmpty. Operand 13513 states and 35029 transitions. [2021-06-05 21:08:37,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:08:37,699 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:08:37,699 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:08:37,899 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 405 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable847 [2021-06-05 21:08:37,900 INFO L430 AbstractCegarLoop]: === Iteration 414 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:08:37,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:08:37,900 INFO L82 PathProgramCache]: Analyzing trace with hash 917417269, now seen corresponding path program 243 times [2021-06-05 21:08:37,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:08:37,900 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302301940] [2021-06-05 21:08:37,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:08:37,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:08:38,076 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:08:38,076 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:08:38,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302301940] [2021-06-05 21:08:38,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302301940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:08:38,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454558759] [2021-06-05 21:08:38,076 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:08:38,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 21:08:38,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:08:38,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 21:08:38,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:08:38,438 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:08:38,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454558759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:08:38,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:08:38,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2021-06-05 21:08:38,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586857390] [2021-06-05 21:08:38,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 21:08:38,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:08:38,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 21:08:38,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=585, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:08:38,439 INFO L87 Difference]: Start difference. First operand 13513 states and 35029 transitions. Second operand has 26 states, 26 states have (on average 3.269230769230769) internal successors, (85), 25 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:39,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:08:39,583 INFO L93 Difference]: Finished difference Result 13861 states and 35583 transitions. [2021-06-05 21:08:39,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:08:39,583 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.269230769230769) internal successors, (85), 25 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:08:39,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:08:39,597 INFO L225 Difference]: With dead ends: 13861 [2021-06-05 21:08:39,598 INFO L226 Difference]: Without dead ends: 13757 [2021-06-05 21:08:39,598 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 338.1ms TimeCoverageRelationStatistics Valid=65, Invalid=585, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:08:39,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13757 states. [2021-06-05 21:08:39,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13757 to 13513. [2021-06-05 21:08:39,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13513 states, 13512 states have (on average 2.5887359384251036) internal successors, (34979), 13512 states have internal predecessors, (34979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:39,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13513 states to 13513 states and 34979 transitions. [2021-06-05 21:08:39,761 INFO L78 Accepts]: Start accepts. Automaton has 13513 states and 34979 transitions. Word has length 59 [2021-06-05 21:08:39,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:08:39,762 INFO L482 AbstractCegarLoop]: Abstraction has 13513 states and 34979 transitions. [2021-06-05 21:08:39,762 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 3.269230769230769) internal successors, (85), 25 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:39,762 INFO L276 IsEmpty]: Start isEmpty. Operand 13513 states and 34979 transitions. [2021-06-05 21:08:39,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:08:39,771 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:08:39,771 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:08:39,971 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable848,406 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:08:39,972 INFO L430 AbstractCegarLoop]: === Iteration 415 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:08:39,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:08:39,972 INFO L82 PathProgramCache]: Analyzing trace with hash -1852033535, now seen corresponding path program 244 times [2021-06-05 21:08:39,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:08:39,972 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526148840] [2021-06-05 21:08:39,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:08:39,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:08:40,063 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:08:40,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:08:40,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526148840] [2021-06-05 21:08:40,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526148840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:08:40,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402627675] [2021-06-05 21:08:40,064 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:08:40,090 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:08:40,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:08:40,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 21:08:40,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:08:40,173 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:08:40,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402627675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:08:40,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:08:40,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 21:08:40,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384507912] [2021-06-05 21:08:40,173 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:08:40,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:08:40,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:08:40,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:08:40,174 INFO L87 Difference]: Start difference. First operand 13513 states and 34979 transitions. Second operand has 12 states, 12 states have (on average 5.0) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:40,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:08:40,614 INFO L93 Difference]: Finished difference Result 14176 states and 36253 transitions. [2021-06-05 21:08:40,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:08:40,615 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:08:40,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:08:40,631 INFO L225 Difference]: With dead ends: 14176 [2021-06-05 21:08:40,631 INFO L226 Difference]: Without dead ends: 14176 [2021-06-05 21:08:40,632 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 142.3ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:08:40,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14176 states. [2021-06-05 21:08:40,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14176 to 13534. [2021-06-05 21:08:40,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13534 states, 13533 states have (on average 2.589448015960984) internal successors, (35043), 13533 states have internal predecessors, (35043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:40,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13534 states to 13534 states and 35043 transitions. [2021-06-05 21:08:40,814 INFO L78 Accepts]: Start accepts. Automaton has 13534 states and 35043 transitions. Word has length 59 [2021-06-05 21:08:40,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:08:40,814 INFO L482 AbstractCegarLoop]: Abstraction has 13534 states and 35043 transitions. [2021-06-05 21:08:40,814 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:40,814 INFO L276 IsEmpty]: Start isEmpty. Operand 13534 states and 35043 transitions. [2021-06-05 21:08:40,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:08:40,824 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:08:40,824 INFO L554 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:08:41,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable849,407 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:08:41,024 INFO L430 AbstractCegarLoop]: === Iteration 416 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:08:41,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:08:41,025 INFO L82 PathProgramCache]: Analyzing trace with hash -267823288, now seen corresponding path program 113 times [2021-06-05 21:08:41,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:08:41,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193751680] [2021-06-05 21:08:41,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:08:41,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:08:41,094 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 102 proven. 76 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:08:41,094 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:08:41,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193751680] [2021-06-05 21:08:41,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193751680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:08:41,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959371938] [2021-06-05 21:08:41,095 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:08:41,125 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 21:08:41,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:08:41,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:08:41,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:08:41,230 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 103 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:08:41,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959371938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:08:41,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:08:41,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 14 [2021-06-05 21:08:41,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74253583] [2021-06-05 21:08:41,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:08:41,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:08:41,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:08:41,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:08:41,230 INFO L87 Difference]: Start difference. First operand 13534 states and 35043 transitions. Second operand has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:41,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:08:41,467 INFO L93 Difference]: Finished difference Result 19967 states and 49349 transitions. [2021-06-05 21:08:41,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:08:41,467 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:08:41,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:08:41,491 INFO L225 Difference]: With dead ends: 19967 [2021-06-05 21:08:41,491 INFO L226 Difference]: Without dead ends: 19967 [2021-06-05 21:08:41,491 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 90.0ms TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:08:41,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19967 states. [2021-06-05 21:08:41,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19967 to 14829. [2021-06-05 21:08:41,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14829 states, 14828 states have (on average 2.625573239816563) internal successors, (38932), 14828 states have internal predecessors, (38932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:41,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14829 states to 14829 states and 38932 transitions. [2021-06-05 21:08:41,710 INFO L78 Accepts]: Start accepts. Automaton has 14829 states and 38932 transitions. Word has length 59 [2021-06-05 21:08:41,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:08:41,710 INFO L482 AbstractCegarLoop]: Abstraction has 14829 states and 38932 transitions. [2021-06-05 21:08:41,710 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:41,710 INFO L276 IsEmpty]: Start isEmpty. Operand 14829 states and 38932 transitions. [2021-06-05 21:08:41,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:08:41,720 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:08:41,720 INFO L554 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:08:41,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable850,408 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:08:41,920 INFO L430 AbstractCegarLoop]: === Iteration 417 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:08:41,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:08:41,921 INFO L82 PathProgramCache]: Analyzing trace with hash -801688664, now seen corresponding path program 245 times [2021-06-05 21:08:41,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:08:41,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783340447] [2021-06-05 21:08:41,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:08:41,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:08:42,006 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 87 proven. 91 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:08:42,006 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:08:42,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783340447] [2021-06-05 21:08:42,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783340447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:08:42,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541965306] [2021-06-05 21:08:42,007 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:08:42,055 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 21:08:42,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:08:42,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:08:42,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:08:42,188 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 88 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:08:42,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541965306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:08:42,188 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:08:42,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 19 [2021-06-05 21:08:42,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69021428] [2021-06-05 21:08:42,188 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 21:08:42,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:08:42,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 21:08:42,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:08:42,189 INFO L87 Difference]: Start difference. First operand 14829 states and 38932 transitions. Second operand has 20 states, 20 states have (on average 4.5) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:42,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:08:42,539 INFO L93 Difference]: Finished difference Result 15741 states and 40619 transitions. [2021-06-05 21:08:42,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:08:42,539 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.5) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:08:42,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:08:42,557 INFO L225 Difference]: With dead ends: 15741 [2021-06-05 21:08:42,557 INFO L226 Difference]: Without dead ends: 15735 [2021-06-05 21:08:42,557 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 127.2ms TimeCoverageRelationStatistics Valid=135, Invalid=285, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:08:42,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15735 states. [2021-06-05 21:08:42,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15735 to 14730. [2021-06-05 21:08:42,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14730 states, 14729 states have (on average 2.6223776223776225) internal successors, (38625), 14729 states have internal predecessors, (38625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:42,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14730 states to 14730 states and 38625 transitions. [2021-06-05 21:08:42,827 INFO L78 Accepts]: Start accepts. Automaton has 14730 states and 38625 transitions. Word has length 59 [2021-06-05 21:08:42,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:08:42,827 INFO L482 AbstractCegarLoop]: Abstraction has 14730 states and 38625 transitions. [2021-06-05 21:08:42,827 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 4.5) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:42,827 INFO L276 IsEmpty]: Start isEmpty. Operand 14730 states and 38625 transitions. [2021-06-05 21:08:42,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:08:42,837 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:08:42,838 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:08:43,038 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 409 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable851 [2021-06-05 21:08:43,038 INFO L430 AbstractCegarLoop]: === Iteration 418 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:08:43,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:08:43,038 INFO L82 PathProgramCache]: Analyzing trace with hash 925621557, now seen corresponding path program 114 times [2021-06-05 21:08:43,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:08:43,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24490133] [2021-06-05 21:08:43,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:08:43,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:08:43,130 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 9 proven. 165 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:08:43,130 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:08:43,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24490133] [2021-06-05 21:08:43,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24490133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:08:43,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549112553] [2021-06-05 21:08:43,130 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:08:43,160 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-05 21:08:43,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:08:43,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 21:08:43,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:08:43,243 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 166 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:08:43,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549112553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:08:43,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:08:43,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 21:08:43,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377820377] [2021-06-05 21:08:43,244 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:08:43,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:08:43,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:08:43,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:08:43,244 INFO L87 Difference]: Start difference. First operand 14730 states and 38625 transitions. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:43,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:08:43,734 INFO L93 Difference]: Finished difference Result 16762 states and 42638 transitions. [2021-06-05 21:08:43,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:08:43,734 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:08:43,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:08:43,753 INFO L225 Difference]: With dead ends: 16762 [2021-06-05 21:08:43,753 INFO L226 Difference]: Without dead ends: 16710 [2021-06-05 21:08:43,753 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 143.1ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:08:43,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16710 states. [2021-06-05 21:08:43,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16710 to 14900. [2021-06-05 21:08:43,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14900 states, 14899 states have (on average 2.6196389019397275) internal successors, (39030), 14899 states have internal predecessors, (39030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:43,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14900 states to 14900 states and 39030 transitions. [2021-06-05 21:08:43,953 INFO L78 Accepts]: Start accepts. Automaton has 14900 states and 39030 transitions. Word has length 59 [2021-06-05 21:08:43,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:08:43,953 INFO L482 AbstractCegarLoop]: Abstraction has 14900 states and 39030 transitions. [2021-06-05 21:08:43,953 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:43,953 INFO L276 IsEmpty]: Start isEmpty. Operand 14900 states and 39030 transitions. [2021-06-05 21:08:43,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:08:43,963 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:08:43,963 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:08:44,163 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 410 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable854 [2021-06-05 21:08:44,164 INFO L430 AbstractCegarLoop]: === Iteration 419 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:08:44,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:08:44,164 INFO L82 PathProgramCache]: Analyzing trace with hash -1869012747, now seen corresponding path program 246 times [2021-06-05 21:08:44,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:08:44,164 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000733597] [2021-06-05 21:08:44,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:08:44,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:08:44,247 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 20 proven. 154 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:08:44,247 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:08:44,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000733597] [2021-06-05 21:08:44,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000733597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:08:44,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095547692] [2021-06-05 21:08:44,248 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:08:44,278 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-05 21:08:44,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:08:44,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 21:08:44,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:08:44,371 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 159 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:08:44,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095547692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:08:44,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:08:44,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 21:08:44,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834778295] [2021-06-05 21:08:44,372 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:08:44,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:08:44,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:08:44,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:08:44,372 INFO L87 Difference]: Start difference. First operand 14900 states and 39030 transitions. Second operand has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:45,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:08:45,068 INFO L93 Difference]: Finished difference Result 15921 states and 40869 transitions. [2021-06-05 21:08:45,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:08:45,068 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:08:45,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:08:45,086 INFO L225 Difference]: With dead ends: 15921 [2021-06-05 21:08:45,086 INFO L226 Difference]: Without dead ends: 15883 [2021-06-05 21:08:45,086 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 142.7ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:08:45,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15883 states. [2021-06-05 21:08:45,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15883 to 14906. [2021-06-05 21:08:45,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14906 states, 14905 states have (on average 2.617309627641731) internal successors, (39011), 14905 states have internal predecessors, (39011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:45,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14906 states to 14906 states and 39011 transitions. [2021-06-05 21:08:45,284 INFO L78 Accepts]: Start accepts. Automaton has 14906 states and 39011 transitions. Word has length 59 [2021-06-05 21:08:45,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:08:45,284 INFO L482 AbstractCegarLoop]: Abstraction has 14906 states and 39011 transitions. [2021-06-05 21:08:45,284 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:45,284 INFO L276 IsEmpty]: Start isEmpty. Operand 14906 states and 39011 transitions. [2021-06-05 21:08:45,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:08:45,294 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:08:45,294 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:08:45,494 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 411 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable855 [2021-06-05 21:08:45,494 INFO L430 AbstractCegarLoop]: === Iteration 420 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:08:45,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:08:45,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1812418369, now seen corresponding path program 247 times [2021-06-05 21:08:45,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:08:45,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896692121] [2021-06-05 21:08:45,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:08:45,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:08:45,594 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 155 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:08:45,594 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:08:45,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896692121] [2021-06-05 21:08:45,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896692121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:08:45,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598134748] [2021-06-05 21:08:45,594 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:08:45,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:08:45,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 21:08:45,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:08:45,704 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 156 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:08:45,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598134748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:08:45,704 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:08:45,704 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 21:08:45,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790615214] [2021-06-05 21:08:45,705 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:08:45,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:08:45,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:08:45,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:08:45,705 INFO L87 Difference]: Start difference. First operand 14906 states and 39011 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:46,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:08:46,242 INFO L93 Difference]: Finished difference Result 16341 states and 41812 transitions. [2021-06-05 21:08:46,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:08:46,243 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:08:46,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:08:46,264 INFO L225 Difference]: With dead ends: 16341 [2021-06-05 21:08:46,264 INFO L226 Difference]: Without dead ends: 16329 [2021-06-05 21:08:46,264 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 149.6ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:08:46,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16329 states. [2021-06-05 21:08:46,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16329 to 14918. [2021-06-05 21:08:46,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14918 states, 14917 states have (on average 2.61661191928672) internal successors, (39032), 14917 states have internal predecessors, (39032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:46,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14918 states to 14918 states and 39032 transitions. [2021-06-05 21:08:46,519 INFO L78 Accepts]: Start accepts. Automaton has 14918 states and 39032 transitions. Word has length 59 [2021-06-05 21:08:46,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:08:46,519 INFO L482 AbstractCegarLoop]: Abstraction has 14918 states and 39032 transitions. [2021-06-05 21:08:46,519 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:46,519 INFO L276 IsEmpty]: Start isEmpty. Operand 14918 states and 39032 transitions. [2021-06-05 21:08:46,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:08:46,529 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:08:46,529 INFO L554 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:08:46,729 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 412 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable856 [2021-06-05 21:08:46,730 INFO L430 AbstractCegarLoop]: === Iteration 421 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:08:46,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:08:46,730 INFO L82 PathProgramCache]: Analyzing trace with hash 164060866, now seen corresponding path program 248 times [2021-06-05 21:08:46,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:08:46,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455031911] [2021-06-05 21:08:46,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:08:46,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:08:46,814 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 80 proven. 96 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:08:46,815 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:08:46,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455031911] [2021-06-05 21:08:46,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455031911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:08:46,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997402621] [2021-06-05 21:08:46,815 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:08:46,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:08:46,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:08:46,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:08:46,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:08:46,953 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 80 proven. 96 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:08:46,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997402621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:08:46,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:08:46,953 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 21:08:46,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644526561] [2021-06-05 21:08:46,954 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:08:46,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:08:46,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:08:46,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:08:46,954 INFO L87 Difference]: Start difference. First operand 14918 states and 39032 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:47,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:08:47,189 INFO L93 Difference]: Finished difference Result 16558 states and 41906 transitions. [2021-06-05 21:08:47,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:08:47,189 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:08:47,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:08:47,208 INFO L225 Difference]: With dead ends: 16558 [2021-06-05 21:08:47,209 INFO L226 Difference]: Without dead ends: 16534 [2021-06-05 21:08:47,209 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 96.7ms TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:08:47,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16534 states. [2021-06-05 21:08:47,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16534 to 14871. [2021-06-05 21:08:47,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14871 states, 14870 states have (on average 2.6131136516476126) internal successors, (38857), 14870 states have internal predecessors, (38857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:47,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14871 states to 14871 states and 38857 transitions. [2021-06-05 21:08:47,416 INFO L78 Accepts]: Start accepts. Automaton has 14871 states and 38857 transitions. Word has length 59 [2021-06-05 21:08:47,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:08:47,416 INFO L482 AbstractCegarLoop]: Abstraction has 14871 states and 38857 transitions. [2021-06-05 21:08:47,416 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:47,417 INFO L276 IsEmpty]: Start isEmpty. Operand 14871 states and 38857 transitions. [2021-06-05 21:08:47,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:08:47,427 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:08:47,427 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:08:47,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable857,413 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:08:47,627 INFO L430 AbstractCegarLoop]: === Iteration 422 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:08:47,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:08:47,627 INFO L82 PathProgramCache]: Analyzing trace with hash -340631593, now seen corresponding path program 249 times [2021-06-05 21:08:47,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:08:47,627 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278943152] [2021-06-05 21:08:47,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:08:47,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:08:47,717 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:08:47,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:08:47,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278943152] [2021-06-05 21:08:47,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278943152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:08:47,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838430653] [2021-06-05 21:08:47,718 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 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:08:47,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-06-05 21:08:47,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:08:47,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 21:08:47,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:08:47,832 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:08:47,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838430653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:08:47,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:08:47,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:08:47,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374142830] [2021-06-05 21:08:47,832 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:08:47,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:08:47,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:08:47,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:08:47,833 INFO L87 Difference]: Start difference. First operand 14871 states and 38857 transitions. Second operand has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:48,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:08:48,500 INFO L93 Difference]: Finished difference Result 17148 states and 43479 transitions. [2021-06-05 21:08:48,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:08:48,500 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:08:48,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:08:48,519 INFO L225 Difference]: With dead ends: 17148 [2021-06-05 21:08:48,519 INFO L226 Difference]: Without dead ends: 17136 [2021-06-05 21:08:48,519 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 171.6ms TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:08:48,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17136 states. [2021-06-05 21:08:48,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17136 to 14915. [2021-06-05 21:08:48,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14915 states, 14914 states have (on average 2.6129140404988602) internal successors, (38969), 14914 states have internal predecessors, (38969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:48,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14915 states to 14915 states and 38969 transitions. [2021-06-05 21:08:48,727 INFO L78 Accepts]: Start accepts. Automaton has 14915 states and 38969 transitions. Word has length 59 [2021-06-05 21:08:48,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:08:48,728 INFO L482 AbstractCegarLoop]: Abstraction has 14915 states and 38969 transitions. [2021-06-05 21:08:48,728 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:48,728 INFO L276 IsEmpty]: Start isEmpty. Operand 14915 states and 38969 transitions. [2021-06-05 21:08:48,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:08:48,738 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:08:48,738 INFO L554 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:08:48,938 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 414 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable860 [2021-06-05 21:08:48,939 INFO L430 AbstractCegarLoop]: === Iteration 423 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:08:48,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:08:48,939 INFO L82 PathProgramCache]: Analyzing trace with hash -578693110, now seen corresponding path program 115 times [2021-06-05 21:08:48,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:08:48,939 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213862216] [2021-06-05 21:08:48,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:08:48,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:08:49,004 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 108 proven. 70 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:08:49,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:08:49,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213862216] [2021-06-05 21:08:49,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213862216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:08:49,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119644136] [2021-06-05 21:08:49,005 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:08:49,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:08:49,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:08:49,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:08:49,118 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 109 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:08:49,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119644136] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:08:49,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:08:49,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 12 [2021-06-05 21:08:49,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874725013] [2021-06-05 21:08:49,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:08:49,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:08:49,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:08:49,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:08:49,119 INFO L87 Difference]: Start difference. First operand 14915 states and 38969 transitions. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:49,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:08:49,325 INFO L93 Difference]: Finished difference Result 19459 states and 48107 transitions. [2021-06-05 21:08:49,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:08:49,325 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:08:49,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:08:49,348 INFO L225 Difference]: With dead ends: 19459 [2021-06-05 21:08:49,348 INFO L226 Difference]: Without dead ends: 19451 [2021-06-05 21:08:49,348 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 72.6ms TimeCoverageRelationStatistics Valid=88, Invalid=122, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:08:49,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19451 states. [2021-06-05 21:08:49,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19451 to 15127. [2021-06-05 21:08:49,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15127 states, 15126 states have (on average 2.619264841993918) internal successors, (39619), 15126 states have internal predecessors, (39619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:49,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15127 states to 15127 states and 39619 transitions. [2021-06-05 21:08:49,572 INFO L78 Accepts]: Start accepts. Automaton has 15127 states and 39619 transitions. Word has length 59 [2021-06-05 21:08:49,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:08:49,572 INFO L482 AbstractCegarLoop]: Abstraction has 15127 states and 39619 transitions. [2021-06-05 21:08:49,572 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:49,572 INFO L276 IsEmpty]: Start isEmpty. Operand 15127 states and 39619 transitions. [2021-06-05 21:08:49,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:08:49,582 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:08:49,582 INFO L554 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:08:49,783 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 415 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable861 [2021-06-05 21:08:49,783 INFO L430 AbstractCegarLoop]: === Iteration 424 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:08:49,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:08:49,783 INFO L82 PathProgramCache]: Analyzing trace with hash -1200573520, now seen corresponding path program 116 times [2021-06-05 21:08:49,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:08:49,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370065053] [2021-06-05 21:08:49,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:08:49,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:08:49,862 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 108 proven. 69 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:08:49,862 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:08:49,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370065053] [2021-06-05 21:08:49,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370065053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:08:49,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733620196] [2021-06-05 21:08:49,862 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:08:49,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:08:49,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:08:49,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:08:49,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:08:50,067 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 109 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:08:50,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733620196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:08:50,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:08:50,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 12 [2021-06-05 21:08:50,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028940852] [2021-06-05 21:08:50,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:08:50,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:08:50,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:08:50,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:08:50,068 INFO L87 Difference]: Start difference. First operand 15127 states and 39619 transitions. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:50,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:08:50,278 INFO L93 Difference]: Finished difference Result 21539 states and 52894 transitions. [2021-06-05 21:08:50,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:08:50,278 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:08:50,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:08:50,303 INFO L225 Difference]: With dead ends: 21539 [2021-06-05 21:08:50,303 INFO L226 Difference]: Without dead ends: 21539 [2021-06-05 21:08:50,303 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 79.2ms TimeCoverageRelationStatistics Valid=88, Invalid=122, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:08:50,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21539 states. [2021-06-05 21:08:50,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21539 to 15133. [2021-06-05 21:08:50,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15133 states, 15132 states have (on average 2.6190192968543484) internal successors, (39631), 15132 states have internal predecessors, (39631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:50,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15133 states to 15133 states and 39631 transitions. [2021-06-05 21:08:50,553 INFO L78 Accepts]: Start accepts. Automaton has 15133 states and 39631 transitions. Word has length 59 [2021-06-05 21:08:50,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:08:50,553 INFO L482 AbstractCegarLoop]: Abstraction has 15133 states and 39631 transitions. [2021-06-05 21:08:50,553 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:50,553 INFO L276 IsEmpty]: Start isEmpty. Operand 15133 states and 39631 transitions. [2021-06-05 21:08:50,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:08:50,563 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:08:50,564 INFO L554 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:08:50,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable863,416 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:08:50,764 INFO L430 AbstractCegarLoop]: === Iteration 425 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:08:50,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:08:50,764 INFO L82 PathProgramCache]: Analyzing trace with hash 1456821320, now seen corresponding path program 117 times [2021-06-05 21:08:50,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:08:50,764 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111133248] [2021-06-05 21:08:50,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:08:50,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:08:50,840 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 103 proven. 75 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:08:50,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:08:50,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111133248] [2021-06-05 21:08:50,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111133248] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:08:50,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108666640] [2021-06-05 21:08:50,840 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:08:50,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 21:08:50,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:08:50,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:08:50,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:08:50,961 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 104 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:08:50,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108666640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:08:50,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:08:50,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-06-05 21:08:50,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912502758] [2021-06-05 21:08:50,961 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:08:50,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:08:50,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:08:50,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:08:50,962 INFO L87 Difference]: Start difference. First operand 15133 states and 39631 transitions. Second operand has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:51,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:08:51,194 INFO L93 Difference]: Finished difference Result 19875 states and 49164 transitions. [2021-06-05 21:08:51,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:08:51,194 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:08:51,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:08:51,215 INFO L225 Difference]: With dead ends: 19875 [2021-06-05 21:08:51,215 INFO L226 Difference]: Without dead ends: 19875 [2021-06-05 21:08:51,216 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 94.3ms TimeCoverageRelationStatistics Valid=107, Invalid=165, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:08:51,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19875 states. [2021-06-05 21:08:51,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19875 to 14798. [2021-06-05 21:08:51,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14798 states, 14797 states have (on average 2.6091099547205516) internal successors, (38607), 14797 states have internal predecessors, (38607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:51,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14798 states to 14798 states and 38607 transitions. [2021-06-05 21:08:51,437 INFO L78 Accepts]: Start accepts. Automaton has 14798 states and 38607 transitions. Word has length 59 [2021-06-05 21:08:51,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:08:51,437 INFO L482 AbstractCegarLoop]: Abstraction has 14798 states and 38607 transitions. [2021-06-05 21:08:51,437 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:51,437 INFO L276 IsEmpty]: Start isEmpty. Operand 14798 states and 38607 transitions. [2021-06-05 21:08:51,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:08:51,447 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:08:51,447 INFO L554 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:08:51,647 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 417 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable864 [2021-06-05 21:08:51,648 INFO L430 AbstractCegarLoop]: === Iteration 426 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:08:51,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:08:51,648 INFO L82 PathProgramCache]: Analyzing trace with hash 1191927516, now seen corresponding path program 250 times [2021-06-05 21:08:51,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:08:51,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685916217] [2021-06-05 21:08:51,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:08:51,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:08:51,745 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 81 proven. 97 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:08:51,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:08:51,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685916217] [2021-06-05 21:08:51,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685916217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:08:51,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229543266] [2021-06-05 21:08:51,746 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:08:51,775 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:08:51,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:08:51,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:08:51,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:08:51,857 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 81 proven. 97 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:08:51,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229543266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:08:51,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:08:51,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-05 21:08:51,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400635801] [2021-06-05 21:08:51,857 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:08:51,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:08:51,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:08:51,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:08:51,858 INFO L87 Difference]: Start difference. First operand 14798 states and 38607 transitions. Second operand has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:52,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:08:52,087 INFO L93 Difference]: Finished difference Result 16237 states and 41157 transitions. [2021-06-05 21:08:52,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:08:52,088 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:08:52,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:08:52,106 INFO L225 Difference]: With dead ends: 16237 [2021-06-05 21:08:52,107 INFO L226 Difference]: Without dead ends: 16219 [2021-06-05 21:08:52,107 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 104.5ms TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:08:52,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16219 states. [2021-06-05 21:08:52,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16219 to 14798. [2021-06-05 21:08:52,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14798 states, 14797 states have (on average 2.608298979522876) internal successors, (38595), 14797 states have internal predecessors, (38595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:52,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14798 states to 14798 states and 38595 transitions. [2021-06-05 21:08:52,319 INFO L78 Accepts]: Start accepts. Automaton has 14798 states and 38595 transitions. Word has length 59 [2021-06-05 21:08:52,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:08:52,320 INFO L482 AbstractCegarLoop]: Abstraction has 14798 states and 38595 transitions. [2021-06-05 21:08:52,320 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:52,320 INFO L276 IsEmpty]: Start isEmpty. Operand 14798 states and 38595 transitions. [2021-06-05 21:08:52,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:08:52,329 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:08:52,329 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:08:52,529 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable865,418 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:08:52,530 INFO L430 AbstractCegarLoop]: === Iteration 427 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:08:52,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:08:52,530 INFO L82 PathProgramCache]: Analyzing trace with hash 2094564251, now seen corresponding path program 118 times [2021-06-05 21:08:52,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:08:52,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766314380] [2021-06-05 21:08:52,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:08:52,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:08:52,623 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 9 proven. 165 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:08:52,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:08:52,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766314380] [2021-06-05 21:08:52,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766314380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:08:52,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709603285] [2021-06-05 21:08:52,624 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:08:52,677 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:08:52,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:08:52,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 21:08:52,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:08:52,760 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 166 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:08:52,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709603285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:08:52,761 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:08:52,761 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 21:08:52,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631837025] [2021-06-05 21:08:52,761 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:08:52,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:08:52,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:08:52,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:08:52,761 INFO L87 Difference]: Start difference. First operand 14798 states and 38595 transitions. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:53,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:08:53,305 INFO L93 Difference]: Finished difference Result 16875 states and 42676 transitions. [2021-06-05 21:08:53,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:08:53,305 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:08:53,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:08:53,320 INFO L225 Difference]: With dead ends: 16875 [2021-06-05 21:08:53,320 INFO L226 Difference]: Without dead ends: 16832 [2021-06-05 21:08:53,320 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 145.2ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:08:53,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16832 states. [2021-06-05 21:08:53,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16832 to 14910. [2021-06-05 21:08:53,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14910 states, 14909 states have (on average 2.608357368032732) internal successors, (38888), 14909 states have internal predecessors, (38888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:53,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14910 states to 14910 states and 38888 transitions. [2021-06-05 21:08:53,518 INFO L78 Accepts]: Start accepts. Automaton has 14910 states and 38888 transitions. Word has length 59 [2021-06-05 21:08:53,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:08:53,518 INFO L482 AbstractCegarLoop]: Abstraction has 14910 states and 38888 transitions. [2021-06-05 21:08:53,518 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:53,518 INFO L276 IsEmpty]: Start isEmpty. Operand 14910 states and 38888 transitions. [2021-06-05 21:08:53,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:08:53,528 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:08:53,528 INFO L554 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:08:53,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 419 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable869 [2021-06-05 21:08:53,728 INFO L430 AbstractCegarLoop]: === Iteration 428 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:08:53,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:08:53,728 INFO L82 PathProgramCache]: Analyzing trace with hash 540867394, now seen corresponding path program 251 times [2021-06-05 21:08:53,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:08:53,728 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615655805] [2021-06-05 21:08:53,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:08:53,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:08:53,787 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 69 proven. 105 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:08:53,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:08:53,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615655805] [2021-06-05 21:08:53,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615655805] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:08:53,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596756479] [2021-06-05 21:08:53,787 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:08:53,818 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-05 21:08:53,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:08:53,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:08:53,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:08:53,929 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 73 proven. 105 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:08:53,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596756479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:08:53,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:08:53,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 16 [2021-06-05 21:08:53,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698123875] [2021-06-05 21:08:53,929 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:08:53,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:08:53,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:08:53,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:08:53,930 INFO L87 Difference]: Start difference. First operand 14910 states and 38888 transitions. Second operand has 17 states, 17 states have (on average 4.823529411764706) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:54,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:08:54,179 INFO L93 Difference]: Finished difference Result 17259 states and 43116 transitions. [2021-06-05 21:08:54,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:08:54,179 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.823529411764706) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:08:54,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:08:54,199 INFO L225 Difference]: With dead ends: 17259 [2021-06-05 21:08:54,199 INFO L226 Difference]: Without dead ends: 17256 [2021-06-05 21:08:54,200 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 87.2ms TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:08:54,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17256 states. [2021-06-05 21:08:54,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17256 to 14884. [2021-06-05 21:08:54,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14884 states, 14883 states have (on average 2.6065309413424713) internal successors, (38793), 14883 states have internal predecessors, (38793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:54,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14884 states to 14884 states and 38793 transitions. [2021-06-05 21:08:54,407 INFO L78 Accepts]: Start accepts. Automaton has 14884 states and 38793 transitions. Word has length 59 [2021-06-05 21:08:54,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:08:54,407 INFO L482 AbstractCegarLoop]: Abstraction has 14884 states and 38793 transitions. [2021-06-05 21:08:54,407 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.823529411764706) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:54,407 INFO L276 IsEmpty]: Start isEmpty. Operand 14884 states and 38793 transitions. [2021-06-05 21:08:54,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:08:54,417 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:08:54,417 INFO L554 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:08:54,617 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 420 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable870 [2021-06-05 21:08:54,618 INFO L430 AbstractCegarLoop]: === Iteration 429 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:08:54,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:08:54,618 INFO L82 PathProgramCache]: Analyzing trace with hash 747929960, now seen corresponding path program 252 times [2021-06-05 21:08:54,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:08:54,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822169907] [2021-06-05 21:08:54,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:08:54,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:08:54,683 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 65 proven. 109 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:08:54,683 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:08:54,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822169907] [2021-06-05 21:08:54,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822169907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:08:54,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808236536] [2021-06-05 21:08:54,683 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:08:54,714 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-05 21:08:54,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:08:54,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:08:54,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:08:54,795 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 65 proven. 109 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:08:54,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808236536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:08:54,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:08:54,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 21:08:54,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95139352] [2021-06-05 21:08:54,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:08:54,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:08:54,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:08:54,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:08:54,796 INFO L87 Difference]: Start difference. First operand 14884 states and 38793 transitions. Second operand has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:55,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:08:55,023 INFO L93 Difference]: Finished difference Result 17001 states and 42513 transitions. [2021-06-05 21:08:55,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:08:55,023 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:08:55,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:08:55,043 INFO L225 Difference]: With dead ends: 17001 [2021-06-05 21:08:55,043 INFO L226 Difference]: Without dead ends: 16983 [2021-06-05 21:08:55,043 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 74.7ms TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:08:55,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16983 states. [2021-06-05 21:08:55,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16983 to 14884. [2021-06-05 21:08:55,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14884 states, 14883 states have (on average 2.605187126251428) internal successors, (38773), 14883 states have internal predecessors, (38773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:55,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14884 states to 14884 states and 38773 transitions. [2021-06-05 21:08:55,272 INFO L78 Accepts]: Start accepts. Automaton has 14884 states and 38773 transitions. Word has length 59 [2021-06-05 21:08:55,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:08:55,272 INFO L482 AbstractCegarLoop]: Abstraction has 14884 states and 38773 transitions. [2021-06-05 21:08:55,272 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) [2021-06-05 21:08:55,272 INFO L276 IsEmpty]: Start isEmpty. Operand 14884 states and 38773 transitions. [2021-06-05 21:08:55,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:08:55,282 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:08:55,282 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:08:55,482 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 421 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable872 [2021-06-05 21:08:55,482 INFO L430 AbstractCegarLoop]: === Iteration 430 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:08:55,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:08:55,483 INFO L82 PathProgramCache]: Analyzing trace with hash -700070053, now seen corresponding path program 253 times [2021-06-05 21:08:55,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:08:55,483 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493164800] [2021-06-05 21:08:55,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:08:55,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:08:55,568 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 20 proven. 154 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:08:55,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:08:55,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493164800] [2021-06-05 21:08:55,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493164800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:08:55,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640577296] [2021-06-05 21:08:55,568 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 422 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 422 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:08:55,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:08:55,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 21:08:55,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:08:55,692 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 159 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:08:55,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640577296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:08:55,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:08:55,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 21:08:55,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407720926] [2021-06-05 21:08:55,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:08:55,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:08:55,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:08:55,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:08:55,693 INFO L87 Difference]: Start difference. First operand 14884 states and 38773 transitions. Second operand has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:56,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:08:56,424 INFO L93 Difference]: Finished difference Result 16014 states and 40804 transitions. [2021-06-05 21:08:56,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:08:56,424 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:08:56,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:08:56,444 INFO L225 Difference]: With dead ends: 16014 [2021-06-05 21:08:56,444 INFO L226 Difference]: Without dead ends: 15958 [2021-06-05 21:08:56,444 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 144.8ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:08:56,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15958 states. [2021-06-05 21:08:56,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15958 to 14911. [2021-06-05 21:08:56,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14911 states, 14910 states have (on average 2.602012072434608) internal successors, (38796), 14910 states have internal predecessors, (38796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:56,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14911 states to 14911 states and 38796 transitions. [2021-06-05 21:08:56,687 INFO L78 Accepts]: Start accepts. Automaton has 14911 states and 38796 transitions. Word has length 59 [2021-06-05 21:08:56,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:08:56,687 INFO L482 AbstractCegarLoop]: Abstraction has 14911 states and 38796 transitions. [2021-06-05 21:08:56,687 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:56,687 INFO L276 IsEmpty]: Start isEmpty. Operand 14911 states and 38796 transitions. [2021-06-05 21:08:56,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:08:56,696 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:08:56,697 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:08:56,897 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable875,422 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:08:56,897 INFO L430 AbstractCegarLoop]: === Iteration 431 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:08:56,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:08:56,897 INFO L82 PathProgramCache]: Analyzing trace with hash -1313606233, now seen corresponding path program 254 times [2021-06-05 21:08:56,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:08:56,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8471843] [2021-06-05 21:08:56,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:08:56,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:08:56,989 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 155 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:08:56,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:08:56,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8471843] [2021-06-05 21:08:56,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8471843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:08:56,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446585295] [2021-06-05 21:08:56,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:08:57,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:08:57,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:08:57,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 21:08:57,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:08:57,100 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 156 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:08:57,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446585295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:08:57,100 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:08:57,100 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 21:08:57,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065955554] [2021-06-05 21:08:57,100 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:08:57,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:08:57,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:08:57,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:08:57,101 INFO L87 Difference]: Start difference. First operand 14911 states and 38796 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:57,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:08:57,637 INFO L93 Difference]: Finished difference Result 16567 states and 42026 transitions. [2021-06-05 21:08:57,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:08:57,638 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:08:57,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:08:57,655 INFO L225 Difference]: With dead ends: 16567 [2021-06-05 21:08:57,655 INFO L226 Difference]: Without dead ends: 16555 [2021-06-05 21:08:57,656 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 143.1ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:08:57,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16555 states. [2021-06-05 21:08:57,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16555 to 14947. [2021-06-05 21:08:57,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14947 states, 14946 states have (on average 2.6009634684865515) internal successors, (38874), 14946 states have internal predecessors, (38874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:57,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14947 states to 14947 states and 38874 transitions. [2021-06-05 21:08:57,859 INFO L78 Accepts]: Start accepts. Automaton has 14947 states and 38874 transitions. Word has length 59 [2021-06-05 21:08:57,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:08:57,859 INFO L482 AbstractCegarLoop]: Abstraction has 14947 states and 38874 transitions. [2021-06-05 21:08:57,859 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:57,860 INFO L276 IsEmpty]: Start isEmpty. Operand 14947 states and 38874 transitions. [2021-06-05 21:08:57,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:08:57,870 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:08:57,870 INFO L554 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:08:58,070 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 423 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable876 [2021-06-05 21:08:58,070 INFO L430 AbstractCegarLoop]: === Iteration 432 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:08:58,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:08:58,071 INFO L82 PathProgramCache]: Analyzing trace with hash -1470905720, now seen corresponding path program 119 times [2021-06-05 21:08:58,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:08:58,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168360335] [2021-06-05 21:08:58,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:08:58,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:08:58,136 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 103 proven. 74 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:08:58,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:08:58,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168360335] [2021-06-05 21:08:58,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168360335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:08:58,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050534192] [2021-06-05 21:08:58,136 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:08:58,204 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-05 21:08:58,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:08:58,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:08:58,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:08:58,305 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 105 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:08:58,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050534192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:08:58,305 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:08:58,305 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 14 [2021-06-05 21:08:58,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379176764] [2021-06-05 21:08:58,305 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:08:58,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:08:58,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:08:58,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:08:58,306 INFO L87 Difference]: Start difference. First operand 14947 states and 38874 transitions. Second operand has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:58,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:08:58,537 INFO L93 Difference]: Finished difference Result 19543 states and 48102 transitions. [2021-06-05 21:08:58,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:08:58,538 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:08:58,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:08:58,560 INFO L225 Difference]: With dead ends: 19543 [2021-06-05 21:08:58,560 INFO L226 Difference]: Without dead ends: 19523 [2021-06-05 21:08:58,560 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 95.2ms TimeCoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:08:58,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19523 states. [2021-06-05 21:08:58,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19523 to 15262. [2021-06-05 21:08:58,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15262 states, 15261 states have (on average 2.6088067623353646) internal successors, (39813), 15261 states have internal predecessors, (39813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:58,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15262 states to 15262 states and 39813 transitions. [2021-06-05 21:08:58,801 INFO L78 Accepts]: Start accepts. Automaton has 15262 states and 39813 transitions. Word has length 59 [2021-06-05 21:08:58,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:08:58,801 INFO L482 AbstractCegarLoop]: Abstraction has 15262 states and 39813 transitions. [2021-06-05 21:08:58,801 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:58,801 INFO L276 IsEmpty]: Start isEmpty. Operand 15262 states and 39813 transitions. [2021-06-05 21:08:58,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:08:58,812 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:08:58,812 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:08:59,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable877,424 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:08:59,012 INFO L430 AbstractCegarLoop]: === Iteration 433 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:08:59,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:08:59,012 INFO L82 PathProgramCache]: Analyzing trace with hash 828311101, now seen corresponding path program 255 times [2021-06-05 21:08:59,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:08:59,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122826475] [2021-06-05 21:08:59,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:08:59,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:08:59,103 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:08:59,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:08:59,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122826475] [2021-06-05 21:08:59,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122826475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:08:59,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632661814] [2021-06-05 21:08:59,104 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 425 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 425 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:08:59,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-06-05 21:08:59,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:08:59,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 21:08:59,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:08:59,222 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:08:59,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632661814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:08:59,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:08:59,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:08:59,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27289509] [2021-06-05 21:08:59,222 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:08:59,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:08:59,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:08:59,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:08:59,223 INFO L87 Difference]: Start difference. First operand 15262 states and 39813 transitions. Second operand has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:59,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:08:59,878 INFO L93 Difference]: Finished difference Result 18379 states and 46239 transitions. [2021-06-05 21:08:59,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 21:08:59,878 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:08:59,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:08:59,900 INFO L225 Difference]: With dead ends: 18379 [2021-06-05 21:08:59,900 INFO L226 Difference]: Without dead ends: 18337 [2021-06-05 21:08:59,901 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 192.2ms TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:08:59,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18337 states. [2021-06-05 21:09:00,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18337 to 15333. [2021-06-05 21:09:00,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15333 states, 15332 states have (on average 2.6092486303156797) internal successors, (40005), 15332 states have internal predecessors, (40005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:00,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15333 states to 15333 states and 40005 transitions. [2021-06-05 21:09:00,174 INFO L78 Accepts]: Start accepts. Automaton has 15333 states and 40005 transitions. Word has length 59 [2021-06-05 21:09:00,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:09:00,174 INFO L482 AbstractCegarLoop]: Abstraction has 15333 states and 40005 transitions. [2021-06-05 21:09:00,174 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:00,174 INFO L276 IsEmpty]: Start isEmpty. Operand 15333 states and 40005 transitions. [2021-06-05 21:09:00,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:09:00,185 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:09:00,186 INFO L554 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:09:00,386 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable880,425 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:09:00,386 INFO L430 AbstractCegarLoop]: === Iteration 434 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:09:00,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:09:00,386 INFO L82 PathProgramCache]: Analyzing trace with hash -1934097086, now seen corresponding path program 256 times [2021-06-05 21:09:00,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:09:00,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109197162] [2021-06-05 21:09:00,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:09:00,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:09:00,460 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 63 proven. 114 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:09:00,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:09:00,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109197162] [2021-06-05 21:09:00,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109197162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:00,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150501658] [2021-06-05 21:09:00,460 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:09:00,486 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:09:00,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:09:00,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:09:00,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:09:00,568 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 63 proven. 114 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:09:00,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150501658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:00,568 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:09:00,568 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-05 21:09:00,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231814118] [2021-06-05 21:09:00,568 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:09:00,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:09:00,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:09:00,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:09:00,569 INFO L87 Difference]: Start difference. First operand 15333 states and 40005 transitions. Second operand has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:00,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:09:00,806 INFO L93 Difference]: Finished difference Result 17426 states and 43666 transitions. [2021-06-05 21:09:00,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:09:00,806 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:09:00,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:09:00,824 INFO L225 Difference]: With dead ends: 17426 [2021-06-05 21:09:00,825 INFO L226 Difference]: Without dead ends: 17402 [2021-06-05 21:09:00,825 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 83.7ms TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:09:00,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17402 states. [2021-06-05 21:09:00,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17402 to 14978. [2021-06-05 21:09:01,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14978 states, 14977 states have (on average 2.6034586365760832) internal successors, (38992), 14977 states have internal predecessors, (38992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:01,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14978 states to 14978 states and 38992 transitions. [2021-06-05 21:09:01,029 INFO L78 Accepts]: Start accepts. Automaton has 14978 states and 38992 transitions. Word has length 59 [2021-06-05 21:09:01,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:09:01,029 INFO L482 AbstractCegarLoop]: Abstraction has 14978 states and 38992 transitions. [2021-06-05 21:09:01,029 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:01,029 INFO L276 IsEmpty]: Start isEmpty. Operand 14978 states and 38992 transitions. [2021-06-05 21:09:01,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:09:01,038 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:09:01,038 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:09:01,239 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable881,426 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:09:01,239 INFO L430 AbstractCegarLoop]: === Iteration 435 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:09:01,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:09:01,239 INFO L82 PathProgramCache]: Analyzing trace with hash 983147635, now seen corresponding path program 257 times [2021-06-05 21:09:01,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:09:01,239 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142460034] [2021-06-05 21:09:01,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:09:01,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:09:01,338 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:09:01,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:09:01,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142460034] [2021-06-05 21:09:01,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142460034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:01,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211538838] [2021-06-05 21:09:01,339 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 427 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 427 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:09:01,370 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-06-05 21:09:01,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:09:01,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 21:09:01,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:09:01,452 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:09:01,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211538838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:01,452 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:09:01,452 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 21:09:01,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938371847] [2021-06-05 21:09:01,453 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:09:01,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:09:01,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:09:01,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:09:01,453 INFO L87 Difference]: Start difference. First operand 14978 states and 38992 transitions. Second operand has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 13 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:02,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:09:02,121 INFO L93 Difference]: Finished difference Result 18584 states and 46418 transitions. [2021-06-05 21:09:02,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:09:02,122 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 13 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:09:02,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:09:02,142 INFO L225 Difference]: With dead ends: 18584 [2021-06-05 21:09:02,142 INFO L226 Difference]: Without dead ends: 18530 [2021-06-05 21:09:02,143 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 206.3ms TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:09:02,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18530 states. [2021-06-05 21:09:02,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18530 to 14933. [2021-06-05 21:09:02,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14933 states, 14932 states have (on average 2.601125100455398) internal successors, (38840), 14932 states have internal predecessors, (38840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:02,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14933 states to 14933 states and 38840 transitions. [2021-06-05 21:09:02,355 INFO L78 Accepts]: Start accepts. Automaton has 14933 states and 38840 transitions. Word has length 59 [2021-06-05 21:09:02,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:09:02,355 INFO L482 AbstractCegarLoop]: Abstraction has 14933 states and 38840 transitions. [2021-06-05 21:09:02,355 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 13 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:02,355 INFO L276 IsEmpty]: Start isEmpty. Operand 14933 states and 38840 transitions. [2021-06-05 21:09:02,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:09:02,365 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:09:02,365 INFO L554 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:09:02,565 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 427 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable885 [2021-06-05 21:09:02,565 INFO L430 AbstractCegarLoop]: === Iteration 436 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:09:02,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:09:02,565 INFO L82 PathProgramCache]: Analyzing trace with hash 123205708, now seen corresponding path program 120 times [2021-06-05 21:09:02,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:09:02,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443767775] [2021-06-05 21:09:02,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:09:02,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:09:02,630 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 124 proven. 53 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:09:02,630 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:09:02,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443767775] [2021-06-05 21:09:02,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443767775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:02,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688615372] [2021-06-05 21:09:02,631 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 428 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 428 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:09:02,660 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-06-05 21:09:02,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:09:02,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:09:02,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:09:02,750 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 125 proven. 53 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:09:02,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688615372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:02,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:09:02,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 12 [2021-06-05 21:09:02,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282307028] [2021-06-05 21:09:02,751 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:09:02,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:09:02,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:09:02,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:09:02,751 INFO L87 Difference]: Start difference. First operand 14933 states and 38840 transitions. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:02,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:09:02,981 INFO L93 Difference]: Finished difference Result 22981 states and 56099 transitions. [2021-06-05 21:09:02,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:09:02,981 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:09:02,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:09:03,007 INFO L225 Difference]: With dead ends: 22981 [2021-06-05 21:09:03,007 INFO L226 Difference]: Without dead ends: 22981 [2021-06-05 21:09:03,007 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 82.2ms TimeCoverageRelationStatistics Valid=102, Invalid=138, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:09:03,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22981 states. [2021-06-05 21:09:03,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22981 to 15053. [2021-06-05 21:09:03,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15053 states, 15052 states have (on average 2.6044379484453892) internal successors, (39202), 15052 states have internal predecessors, (39202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:03,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15053 states to 15053 states and 39202 transitions. [2021-06-05 21:09:03,326 INFO L78 Accepts]: Start accepts. Automaton has 15053 states and 39202 transitions. Word has length 59 [2021-06-05 21:09:03,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:09:03,326 INFO L482 AbstractCegarLoop]: Abstraction has 15053 states and 39202 transitions. [2021-06-05 21:09:03,326 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:03,326 INFO L276 IsEmpty]: Start isEmpty. Operand 15053 states and 39202 transitions. [2021-06-05 21:09:03,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:09:03,335 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:09:03,335 INFO L554 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:09:03,535 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable886,428 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:09:03,536 INFO L430 AbstractCegarLoop]: === Iteration 437 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:09:03,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:09:03,536 INFO L82 PathProgramCache]: Analyzing trace with hash -1514366748, now seen corresponding path program 121 times [2021-06-05 21:09:03,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:09:03,536 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827648372] [2021-06-05 21:09:03,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:09:03,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:09:03,609 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 120 proven. 57 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:09:03,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:09:03,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827648372] [2021-06-05 21:09:03,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827648372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:03,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508483216] [2021-06-05 21:09:03,610 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 429 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 429 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:09:03,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:09:03,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:09:03,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:09:03,724 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 121 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:09:03,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508483216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:03,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:09:03,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-06-05 21:09:03,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4463418] [2021-06-05 21:09:03,725 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:09:03,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:09:03,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:09:03,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:09:03,725 INFO L87 Difference]: Start difference. First operand 15053 states and 39202 transitions. Second operand has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:04,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:09:04,001 INFO L93 Difference]: Finished difference Result 22759 states and 55530 transitions. [2021-06-05 21:09:04,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:09:04,001 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:09:04,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:09:04,027 INFO L225 Difference]: With dead ends: 22759 [2021-06-05 21:09:04,028 INFO L226 Difference]: Without dead ends: 22759 [2021-06-05 21:09:04,028 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 106.7ms TimeCoverageRelationStatistics Valid=138, Invalid=204, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:09:04,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22759 states. [2021-06-05 21:09:04,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22759 to 15073. [2021-06-05 21:09:04,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15073 states, 15072 states have (on average 2.6047638004246285) internal successors, (39259), 15072 states have internal predecessors, (39259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:04,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15073 states to 15073 states and 39259 transitions. [2021-06-05 21:09:04,270 INFO L78 Accepts]: Start accepts. Automaton has 15073 states and 39259 transitions. Word has length 59 [2021-06-05 21:09:04,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:09:04,270 INFO L482 AbstractCegarLoop]: Abstraction has 15073 states and 39259 transitions. [2021-06-05 21:09:04,270 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:04,270 INFO L276 IsEmpty]: Start isEmpty. Operand 15073 states and 39259 transitions. [2021-06-05 21:09:04,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:09:04,280 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:09:04,280 INFO L554 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:09:04,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 429 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable887 [2021-06-05 21:09:04,481 INFO L430 AbstractCegarLoop]: === Iteration 438 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:09:04,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:09:04,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1090605384, now seen corresponding path program 122 times [2021-06-05 21:09:04,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:09:04,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346261737] [2021-06-05 21:09:04,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:09:04,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:09:04,566 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 104 proven. 74 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:09:04,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:09:04,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346261737] [2021-06-05 21:09:04,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346261737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:04,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108280005] [2021-06-05 21:09:04,566 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 430 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 430 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:09:04,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:09:04,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:09:04,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:09:04,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:09:04,706 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 105 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:09:04,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108280005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:04,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:09:04,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 14 [2021-06-05 21:09:04,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333770868] [2021-06-05 21:09:04,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:09:04,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:09:04,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:09:04,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:09:04,707 INFO L87 Difference]: Start difference. First operand 15073 states and 39259 transitions. Second operand has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:04,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:09:04,980 INFO L93 Difference]: Finished difference Result 19776 states and 48785 transitions. [2021-06-05 21:09:04,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:09:04,981 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:09:04,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:09:05,001 INFO L225 Difference]: With dead ends: 19776 [2021-06-05 21:09:05,002 INFO L226 Difference]: Without dead ends: 19776 [2021-06-05 21:09:05,002 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 120.5ms TimeCoverageRelationStatistics Valid=145, Invalid=235, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:09:05,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19776 states. [2021-06-05 21:09:05,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19776 to 14764. [2021-06-05 21:09:05,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14764 states, 14763 states have (on average 2.5980491769965455) internal successors, (38355), 14763 states have internal predecessors, (38355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:05,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14764 states to 14764 states and 38355 transitions. [2021-06-05 21:09:05,220 INFO L78 Accepts]: Start accepts. Automaton has 14764 states and 38355 transitions. Word has length 59 [2021-06-05 21:09:05,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:09:05,220 INFO L482 AbstractCegarLoop]: Abstraction has 14764 states and 38355 transitions. [2021-06-05 21:09:05,220 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:05,220 INFO L276 IsEmpty]: Start isEmpty. Operand 14764 states and 38355 transitions. [2021-06-05 21:09:05,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:09:05,231 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:09:05,231 INFO L554 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:09:05,431 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 430 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable888 [2021-06-05 21:09:05,431 INFO L430 AbstractCegarLoop]: === Iteration 439 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:09:05,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:09:05,431 INFO L82 PathProgramCache]: Analyzing trace with hash 1369750312, now seen corresponding path program 258 times [2021-06-05 21:09:05,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:09:05,431 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872619428] [2021-06-05 21:09:05,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:09:05,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:09:05,514 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 68 proven. 110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:09:05,514 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:09:05,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872619428] [2021-06-05 21:09:05,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872619428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:05,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532309835] [2021-06-05 21:09:05,515 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 431 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 431 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:09:05,543 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 21:09:05,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:09:05,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:09:05,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:09:05,626 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 68 proven. 110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:09:05,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532309835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:05,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:09:05,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-06-05 21:09:05,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373274517] [2021-06-05 21:09:05,627 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:09:05,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:09:05,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:09:05,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:09:05,627 INFO L87 Difference]: Start difference. First operand 14764 states and 38355 transitions. Second operand has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:05,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:09:05,870 INFO L93 Difference]: Finished difference Result 16631 states and 41638 transitions. [2021-06-05 21:09:05,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:09:05,870 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:09:05,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:09:05,889 INFO L225 Difference]: With dead ends: 16631 [2021-06-05 21:09:05,889 INFO L226 Difference]: Without dead ends: 16604 [2021-06-05 21:09:05,889 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 101.5ms TimeCoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:09:05,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16604 states. [2021-06-05 21:09:06,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16604 to 14764. [2021-06-05 21:09:06,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14764 states, 14763 states have (on average 2.597439544807966) internal successors, (38346), 14763 states have internal predecessors, (38346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:06,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14764 states to 14764 states and 38346 transitions. [2021-06-05 21:09:06,091 INFO L78 Accepts]: Start accepts. Automaton has 14764 states and 38346 transitions. Word has length 59 [2021-06-05 21:09:06,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:09:06,091 INFO L482 AbstractCegarLoop]: Abstraction has 14764 states and 38346 transitions. [2021-06-05 21:09:06,091 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:06,091 INFO L276 IsEmpty]: Start isEmpty. Operand 14764 states and 38346 transitions. [2021-06-05 21:09:06,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:09:06,101 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:09:06,101 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:09:06,301 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 431 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable889 [2021-06-05 21:09:06,301 INFO L430 AbstractCegarLoop]: === Iteration 440 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:09:06,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:09:06,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1823442059, now seen corresponding path program 123 times [2021-06-05 21:09:06,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:09:06,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240948382] [2021-06-05 21:09:06,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:09:06,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:09:06,393 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 9 proven. 165 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:09:06,393 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:09:06,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240948382] [2021-06-05 21:09:06,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240948382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:06,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260245932] [2021-06-05 21:09:06,393 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 432 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 432 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:09:06,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-06-05 21:09:06,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:09:06,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 21:09:06,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:09:06,510 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 166 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:09:06,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260245932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:06,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:09:06,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 21:09:06,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561105399] [2021-06-05 21:09:06,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:09:06,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:09:06,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:09:06,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:09:06,511 INFO L87 Difference]: Start difference. First operand 14764 states and 38346 transitions. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:07,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:09:07,067 INFO L93 Difference]: Finished difference Result 16764 states and 42302 transitions. [2021-06-05 21:09:07,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:09:07,068 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:09:07,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:09:07,086 INFO L225 Difference]: With dead ends: 16764 [2021-06-05 21:09:07,086 INFO L226 Difference]: Without dead ends: 16726 [2021-06-05 21:09:07,087 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 143.6ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:09:07,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16726 states. [2021-06-05 21:09:07,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16726 to 14878. [2021-06-05 21:09:07,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14878 states, 14877 states have (on average 2.597297842306917) internal successors, (38640), 14877 states have internal predecessors, (38640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:07,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14878 states to 14878 states and 38640 transitions. [2021-06-05 21:09:07,286 INFO L78 Accepts]: Start accepts. Automaton has 14878 states and 38640 transitions. Word has length 59 [2021-06-05 21:09:07,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:09:07,286 INFO L482 AbstractCegarLoop]: Abstraction has 14878 states and 38640 transitions. [2021-06-05 21:09:07,286 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:07,286 INFO L276 IsEmpty]: Start isEmpty. Operand 14878 states and 38640 transitions. [2021-06-05 21:09:07,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:09:07,297 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:09:07,297 INFO L554 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:09:07,498 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 432 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable894 [2021-06-05 21:09:07,498 INFO L430 AbstractCegarLoop]: === Iteration 441 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:09:07,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:09:07,498 INFO L82 PathProgramCache]: Analyzing trace with hash 917828380, now seen corresponding path program 259 times [2021-06-05 21:09:07,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:09:07,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009890077] [2021-06-05 21:09:07,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:09:07,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:09:07,556 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 62 proven. 112 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:09:07,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:09:07,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009890077] [2021-06-05 21:09:07,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009890077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:07,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116458421] [2021-06-05 21:09:07,556 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 433 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 433 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:09:07,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:09:07,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:09:07,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:09:07,663 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 62 proven. 112 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:09:07,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116458421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:07,663 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:09:07,663 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 21:09:07,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868829090] [2021-06-05 21:09:07,663 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:09:07,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:09:07,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:09:07,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:09:07,664 INFO L87 Difference]: Start difference. First operand 14878 states and 38640 transitions. Second operand has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:07,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:09:07,834 INFO L93 Difference]: Finished difference Result 17271 states and 42891 transitions. [2021-06-05 21:09:07,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:09:07,835 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:09:07,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:09:07,857 INFO L225 Difference]: With dead ends: 17271 [2021-06-05 21:09:07,857 INFO L226 Difference]: Without dead ends: 17268 [2021-06-05 21:09:07,857 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 50.6ms TimeCoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:09:07,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17268 states. [2021-06-05 21:09:08,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17268 to 14858. [2021-06-05 21:09:08,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14858 states, 14857 states have (on average 2.5956114962643873) internal successors, (38563), 14857 states have internal predecessors, (38563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:08,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14858 states to 14858 states and 38563 transitions. [2021-06-05 21:09:08,080 INFO L78 Accepts]: Start accepts. Automaton has 14858 states and 38563 transitions. Word has length 59 [2021-06-05 21:09:08,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:09:08,080 INFO L482 AbstractCegarLoop]: Abstraction has 14858 states and 38563 transitions. [2021-06-05 21:09:08,080 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:08,080 INFO L276 IsEmpty]: Start isEmpty. Operand 14858 states and 38563 transitions. [2021-06-05 21:09:08,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:09:08,090 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:09:08,090 INFO L554 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:09:08,290 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 433 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable895 [2021-06-05 21:09:08,291 INFO L430 AbstractCegarLoop]: === Iteration 442 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:09:08,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:09:08,291 INFO L82 PathProgramCache]: Analyzing trace with hash 1124890946, now seen corresponding path program 260 times [2021-06-05 21:09:08,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:09:08,291 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536994972] [2021-06-05 21:09:08,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:09:08,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:09:08,354 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 57 proven. 117 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:09:08,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:09:08,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536994972] [2021-06-05 21:09:08,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536994972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:08,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640687712] [2021-06-05 21:09:08,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 434 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 434 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:09:08,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:09:08,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:09:08,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:09:08,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:09:08,462 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 57 proven. 117 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:09:08,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640687712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:08,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:09:08,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 21:09:08,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478225587] [2021-06-05 21:09:08,463 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:09:08,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:09:08,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:09:08,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:09:08,463 INFO L87 Difference]: Start difference. First operand 14858 states and 38563 transitions. Second operand has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:08,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:09:08,682 INFO L93 Difference]: Finished difference Result 17287 states and 42863 transitions. [2021-06-05 21:09:08,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:09:08,682 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:09:08,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:09:08,705 INFO L225 Difference]: With dead ends: 17287 [2021-06-05 21:09:08,705 INFO L226 Difference]: Without dead ends: 17269 [2021-06-05 21:09:08,705 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 73.3ms TimeCoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:09:08,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17269 states. [2021-06-05 21:09:08,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17269 to 14858. [2021-06-05 21:09:08,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14858 states, 14857 states have (on average 2.593996096116309) internal successors, (38539), 14857 states have internal predecessors, (38539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:08,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14858 states to 14858 states and 38539 transitions. [2021-06-05 21:09:08,925 INFO L78 Accepts]: Start accepts. Automaton has 14858 states and 38539 transitions. Word has length 59 [2021-06-05 21:09:08,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:09:08,925 INFO L482 AbstractCegarLoop]: Abstraction has 14858 states and 38539 transitions. [2021-06-05 21:09:08,925 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) [2021-06-05 21:09:08,925 INFO L276 IsEmpty]: Start isEmpty. Operand 14858 states and 38539 transitions. [2021-06-05 21:09:08,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:09:08,935 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:09:08,935 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:09:09,135 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable897,434 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:09:09,135 INFO L430 AbstractCegarLoop]: === Iteration 443 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:09:09,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:09:09,135 INFO L82 PathProgramCache]: Analyzing trace with hash -323109067, now seen corresponding path program 261 times [2021-06-05 21:09:09,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:09:09,135 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351692816] [2021-06-05 21:09:09,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:09:09,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:09:09,220 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 20 proven. 154 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:09:09,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:09:09,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351692816] [2021-06-05 21:09:09,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351692816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:09,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102270073] [2021-06-05 21:09:09,220 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 435 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 435 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:09:09,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-06-05 21:09:09,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:09:09,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 21:09:09,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:09:09,347 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 159 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:09:09,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102270073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:09,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:09:09,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 21:09:09,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958718106] [2021-06-05 21:09:09,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:09:09,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:09:09,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:09:09,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:09:09,348 INFO L87 Difference]: Start difference. First operand 14858 states and 38539 transitions. Second operand has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:10,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:09:10,034 INFO L93 Difference]: Finished difference Result 15989 states and 40590 transitions. [2021-06-05 21:09:10,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:09:10,035 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:09:10,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:09:10,054 INFO L225 Difference]: With dead ends: 15989 [2021-06-05 21:09:10,054 INFO L226 Difference]: Without dead ends: 15915 [2021-06-05 21:09:10,054 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 146.0ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:09:10,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15915 states. [2021-06-05 21:09:10,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15915 to 14924. [2021-06-05 21:09:10,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14924 states, 14923 states have (on average 2.588956644106413) internal successors, (38635), 14923 states have internal predecessors, (38635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:10,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14924 states to 14924 states and 38635 transitions. [2021-06-05 21:09:10,299 INFO L78 Accepts]: Start accepts. Automaton has 14924 states and 38635 transitions. Word has length 59 [2021-06-05 21:09:10,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:09:10,300 INFO L482 AbstractCegarLoop]: Abstraction has 14924 states and 38635 transitions. [2021-06-05 21:09:10,300 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:10,300 INFO L276 IsEmpty]: Start isEmpty. Operand 14924 states and 38635 transitions. [2021-06-05 21:09:10,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:09:10,310 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:09:10,310 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:09:10,511 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable900,435 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:09:10,511 INFO L430 AbstractCegarLoop]: === Iteration 444 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:09:10,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:09:10,511 INFO L82 PathProgramCache]: Analyzing trace with hash -936645247, now seen corresponding path program 262 times [2021-06-05 21:09:10,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:09:10,511 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884542319] [2021-06-05 21:09:10,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:09:10,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:09:10,602 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 155 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:09:10,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:09:10,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884542319] [2021-06-05 21:09:10,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884542319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:10,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200168436] [2021-06-05 21:09:10,602 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 436 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 436 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:09:10,630 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:09:10,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:09:10,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 21:09:10,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:09:10,712 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 156 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:09:10,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200168436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:10,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:09:10,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 21:09:10,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032812299] [2021-06-05 21:09:10,712 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:09:10,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:09:10,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:09:10,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:09:10,713 INFO L87 Difference]: Start difference. First operand 14924 states and 38635 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:11,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:09:11,244 INFO L93 Difference]: Finished difference Result 16650 states and 42030 transitions. [2021-06-05 21:09:11,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:09:11,244 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:09:11,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:09:11,263 INFO L225 Difference]: With dead ends: 16650 [2021-06-05 21:09:11,263 INFO L226 Difference]: Without dead ends: 16638 [2021-06-05 21:09:11,263 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 142.5ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:09:11,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16638 states. [2021-06-05 21:09:11,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16638 to 14998. [2021-06-05 21:09:11,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14998 states, 14997 states have (on average 2.587784223511369) internal successors, (38809), 14997 states have internal predecessors, (38809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:11,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14998 states to 14998 states and 38809 transitions. [2021-06-05 21:09:11,464 INFO L78 Accepts]: Start accepts. Automaton has 14998 states and 38809 transitions. Word has length 59 [2021-06-05 21:09:11,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:09:11,464 INFO L482 AbstractCegarLoop]: Abstraction has 14998 states and 38809 transitions. [2021-06-05 21:09:11,464 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:11,464 INFO L276 IsEmpty]: Start isEmpty. Operand 14998 states and 38809 transitions. [2021-06-05 21:09:11,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:09:11,474 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:09:11,474 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:09:11,674 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable901,436 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:09:11,674 INFO L430 AbstractCegarLoop]: === Iteration 445 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:09:11,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:09:11,675 INFO L82 PathProgramCache]: Analyzing trace with hash 1205272087, now seen corresponding path program 263 times [2021-06-05 21:09:11,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:09:11,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422030854] [2021-06-05 21:09:11,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:09:11,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:09:11,764 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:09:11,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:09:11,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422030854] [2021-06-05 21:09:11,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422030854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:11,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922866328] [2021-06-05 21:09:11,764 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 437 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 437 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:09:11,796 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-06-05 21:09:11,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:09:11,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 21:09:11,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:09:11,879 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:09:11,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922866328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:11,879 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:09:11,879 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:09:11,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043221458] [2021-06-05 21:09:11,879 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:09:11,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:09:11,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:09:11,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:09:11,879 INFO L87 Difference]: Start difference. First operand 14998 states and 38809 transitions. Second operand has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:12,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:09:12,557 INFO L93 Difference]: Finished difference Result 18719 states and 46626 transitions. [2021-06-05 21:09:12,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 21:09:12,557 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:09:12,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:09:12,578 INFO L225 Difference]: With dead ends: 18719 [2021-06-05 21:09:12,578 INFO L226 Difference]: Without dead ends: 18665 [2021-06-05 21:09:12,578 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 206.7ms TimeCoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:09:12,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18665 states. [2021-06-05 21:09:12,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18665 to 15200. [2021-06-05 21:09:12,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15200 states, 15199 states have (on average 2.5887887361010593) internal successors, (39347), 15199 states have internal predecessors, (39347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:12,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15200 states to 15200 states and 39347 transitions. [2021-06-05 21:09:12,793 INFO L78 Accepts]: Start accepts. Automaton has 15200 states and 39347 transitions. Word has length 59 [2021-06-05 21:09:12,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:09:12,794 INFO L482 AbstractCegarLoop]: Abstraction has 15200 states and 39347 transitions. [2021-06-05 21:09:12,794 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:12,794 INFO L276 IsEmpty]: Start isEmpty. Operand 15200 states and 39347 transitions. [2021-06-05 21:09:12,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:09:12,804 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:09:12,804 INFO L554 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:09:13,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable902,437 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:09:13,004 INFO L430 AbstractCegarLoop]: === Iteration 446 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:09:13,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:09:13,004 INFO L82 PathProgramCache]: Analyzing trace with hash -1557136100, now seen corresponding path program 264 times [2021-06-05 21:09:13,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:09:13,004 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231701312] [2021-06-05 21:09:13,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:09:13,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:09:13,077 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 52 proven. 125 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:09:13,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:09:13,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231701312] [2021-06-05 21:09:13,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231701312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:13,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336861885] [2021-06-05 21:09:13,078 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 438 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 438 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:09:13,109 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-05 21:09:13,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:09:13,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:09:13,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:09:13,191 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 52 proven. 125 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:09:13,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336861885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:13,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:09:13,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-05 21:09:13,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064006977] [2021-06-05 21:09:13,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:09:13,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:09:13,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:09:13,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:09:13,192 INFO L87 Difference]: Start difference. First operand 15200 states and 39347 transitions. Second operand has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:13,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:09:13,411 INFO L93 Difference]: Finished difference Result 17641 states and 43655 transitions. [2021-06-05 21:09:13,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:09:13,411 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:09:13,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:09:13,431 INFO L225 Difference]: With dead ends: 17641 [2021-06-05 21:09:13,431 INFO L226 Difference]: Without dead ends: 17617 [2021-06-05 21:09:13,431 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 82.7ms TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:09:13,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17617 states. [2021-06-05 21:09:13,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17617 to 15200. [2021-06-05 21:09:13,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15200 states, 15199 states have (on average 2.587670241463254) internal successors, (39330), 15199 states have internal predecessors, (39330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:13,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15200 states to 15200 states and 39330 transitions. [2021-06-05 21:09:13,673 INFO L78 Accepts]: Start accepts. Automaton has 15200 states and 39330 transitions. Word has length 59 [2021-06-05 21:09:13,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:09:13,673 INFO L482 AbstractCegarLoop]: Abstraction has 15200 states and 39330 transitions. [2021-06-05 21:09:13,673 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:13,673 INFO L276 IsEmpty]: Start isEmpty. Operand 15200 states and 39330 transitions. [2021-06-05 21:09:13,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:09:13,682 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:09:13,682 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:09:13,882 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 438 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable903 [2021-06-05 21:09:13,883 INFO L430 AbstractCegarLoop]: === Iteration 447 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:09:13,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:09:13,883 INFO L82 PathProgramCache]: Analyzing trace with hash 1360108621, now seen corresponding path program 265 times [2021-06-05 21:09:13,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:09:13,883 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270405663] [2021-06-05 21:09:13,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:09:13,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:09:13,982 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:09:13,982 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:09:13,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270405663] [2021-06-05 21:09:13,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270405663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:13,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149858049] [2021-06-05 21:09:13,982 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 439 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 439 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:09:14,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:09:14,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 21:09:14,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:09:14,094 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:09:14,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149858049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:14,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:09:14,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 21:09:14,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373965748] [2021-06-05 21:09:14,094 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:09:14,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:09:14,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:09:14,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:09:14,095 INFO L87 Difference]: Start difference. First operand 15200 states and 39330 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:14,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:09:14,957 INFO L93 Difference]: Finished difference Result 21862 states and 53696 transitions. [2021-06-05 21:09:14,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 21:09:14,958 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:09:14,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:09:14,981 INFO L225 Difference]: With dead ends: 21862 [2021-06-05 21:09:14,981 INFO L226 Difference]: Without dead ends: 21748 [2021-06-05 21:09:14,981 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 332.8ms TimeCoverageRelationStatistics Valid=183, Invalid=1299, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 21:09:14,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21748 states. [2021-06-05 21:09:15,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21748 to 15415. [2021-06-05 21:09:15,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15415 states, 15414 states have (on average 2.589139743090697) internal successors, (39909), 15414 states have internal predecessors, (39909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:15,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15415 states to 15415 states and 39909 transitions. [2021-06-05 21:09:15,215 INFO L78 Accepts]: Start accepts. Automaton has 15415 states and 39909 transitions. Word has length 59 [2021-06-05 21:09:15,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:09:15,215 INFO L482 AbstractCegarLoop]: Abstraction has 15415 states and 39909 transitions. [2021-06-05 21:09:15,215 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:15,215 INFO L276 IsEmpty]: Start isEmpty. Operand 15415 states and 39909 transitions. [2021-06-05 21:09:15,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:09:15,226 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:09:15,226 INFO L554 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:09:15,426 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable907,439 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:09:15,426 INFO L430 AbstractCegarLoop]: === Iteration 448 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:09:15,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:09:15,426 INFO L82 PathProgramCache]: Analyzing trace with hash 1746711298, now seen corresponding path program 266 times [2021-06-05 21:09:15,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:09:15,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987840795] [2021-06-05 21:09:15,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:09:15,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:09:15,509 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 53 proven. 124 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:09:15,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:09:15,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987840795] [2021-06-05 21:09:15,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987840795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:15,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652286955] [2021-06-05 21:09:15,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 440 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 440 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:09:15,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:09:15,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:09:15,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:09:15,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:09:15,621 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 53 proven. 124 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:09:15,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652286955] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:15,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:09:15,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-06-05 21:09:15,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266239432] [2021-06-05 21:09:15,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:09:15,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:09:15,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:09:15,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:09:15,622 INFO L87 Difference]: Start difference. First operand 15415 states and 39909 transitions. Second operand has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:15,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:09:15,844 INFO L93 Difference]: Finished difference Result 17893 states and 44283 transitions. [2021-06-05 21:09:15,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:09:15,844 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:09:15,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:09:15,863 INFO L225 Difference]: With dead ends: 17893 [2021-06-05 21:09:15,863 INFO L226 Difference]: Without dead ends: 17860 [2021-06-05 21:09:15,863 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 101.2ms TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:09:15,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17860 states. [2021-06-05 21:09:16,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17860 to 15072. [2021-06-05 21:09:16,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15072 states, 15071 states have (on average 2.5837038020038485) internal successors, (38939), 15071 states have internal predecessors, (38939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:16,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15072 states to 15072 states and 38939 transitions. [2021-06-05 21:09:16,067 INFO L78 Accepts]: Start accepts. Automaton has 15072 states and 38939 transitions. Word has length 59 [2021-06-05 21:09:16,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:09:16,067 INFO L482 AbstractCegarLoop]: Abstraction has 15072 states and 38939 transitions. [2021-06-05 21:09:16,067 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:16,067 INFO L276 IsEmpty]: Start isEmpty. Operand 15072 states and 38939 transitions. [2021-06-05 21:09:16,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:09:16,077 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:09:16,077 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:09:16,278 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable908,440 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:09:16,278 INFO L430 AbstractCegarLoop]: === Iteration 449 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:09:16,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:09:16,278 INFO L82 PathProgramCache]: Analyzing trace with hash 1300417111, now seen corresponding path program 267 times [2021-06-05 21:09:16,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:09:16,278 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155427598] [2021-06-05 21:09:16,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:09:16,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:09:16,387 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:09:16,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:09:16,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155427598] [2021-06-05 21:09:16,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155427598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:16,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128342072] [2021-06-05 21:09:16,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 441 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 441 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:09:16,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-06-05 21:09:16,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:09:16,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 21:09:16,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:09:16,502 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:09:16,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128342072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:16,502 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:09:16,503 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:09:16,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159595245] [2021-06-05 21:09:16,503 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:09:16,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:09:16,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:09:16,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:09:16,503 INFO L87 Difference]: Start difference. First operand 15072 states and 38939 transitions. Second operand has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:17,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:09:17,271 INFO L93 Difference]: Finished difference Result 20407 states and 50176 transitions. [2021-06-05 21:09:17,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:09:17,272 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:09:17,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:09:17,292 INFO L225 Difference]: With dead ends: 20407 [2021-06-05 21:09:17,292 INFO L226 Difference]: Without dead ends: 20251 [2021-06-05 21:09:17,293 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 248.4ms TimeCoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:09:17,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20251 states. [2021-06-05 21:09:17,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20251 to 14617. [2021-06-05 21:09:17,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14617 states, 14616 states have (on average 2.5764915161466884) internal successors, (37658), 14616 states have internal predecessors, (37658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:17,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14617 states to 14617 states and 37658 transitions. [2021-06-05 21:09:17,510 INFO L78 Accepts]: Start accepts. Automaton has 14617 states and 37658 transitions. Word has length 59 [2021-06-05 21:09:17,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:09:17,510 INFO L482 AbstractCegarLoop]: Abstraction has 14617 states and 37658 transitions. [2021-06-05 21:09:17,510 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:17,510 INFO L276 IsEmpty]: Start isEmpty. Operand 14617 states and 37658 transitions. [2021-06-05 21:09:17,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:09:17,520 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:09:17,520 INFO L554 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:09:17,721 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 441 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable913 [2021-06-05 21:09:17,721 INFO L430 AbstractCegarLoop]: === Iteration 450 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:09:17,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:09:17,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1062355594, now seen corresponding path program 124 times [2021-06-05 21:09:17,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:09:17,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569960235] [2021-06-05 21:09:17,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:09:17,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:09:17,785 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 134 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:09:17,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:09:17,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569960235] [2021-06-05 21:09:17,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569960235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:17,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706396856] [2021-06-05 21:09:17,785 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 442 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 442 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:09:17,813 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:09:17,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:09:17,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:09:17,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:09:17,897 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 135 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:09:17,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706396856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:17,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:09:17,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 12 [2021-06-05 21:09:17,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620178094] [2021-06-05 21:09:17,898 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:09:17,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:09:17,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:09:17,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=92, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:09:17,898 INFO L87 Difference]: Start difference. First operand 14617 states and 37658 transitions. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:18,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:09:18,118 INFO L93 Difference]: Finished difference Result 18811 states and 46226 transitions. [2021-06-05 21:09:18,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:09:18,118 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:09:18,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:09:18,139 INFO L225 Difference]: With dead ends: 18811 [2021-06-05 21:09:18,139 INFO L226 Difference]: Without dead ends: 18797 [2021-06-05 21:09:18,139 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 69.5ms TimeCoverageRelationStatistics Valid=86, Invalid=124, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:09:18,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18797 states. [2021-06-05 21:09:18,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18797 to 14958. [2021-06-05 21:09:18,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14958 states, 14957 states have (on average 2.5815337300260746) internal successors, (38612), 14957 states have internal predecessors, (38612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:18,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14958 states to 14958 states and 38612 transitions. [2021-06-05 21:09:18,374 INFO L78 Accepts]: Start accepts. Automaton has 14958 states and 38612 transitions. Word has length 59 [2021-06-05 21:09:18,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:09:18,374 INFO L482 AbstractCegarLoop]: Abstraction has 14958 states and 38612 transitions. [2021-06-05 21:09:18,374 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:18,374 INFO L276 IsEmpty]: Start isEmpty. Operand 14958 states and 38612 transitions. [2021-06-05 21:09:18,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:09:18,384 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:09:18,384 INFO L554 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:09:18,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable914,442 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:09:18,585 INFO L430 AbstractCegarLoop]: === Iteration 451 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:09:18,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:09:18,585 INFO L82 PathProgramCache]: Analyzing trace with hash 440475184, now seen corresponding path program 125 times [2021-06-05 21:09:18,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:09:18,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076239698] [2021-06-05 21:09:18,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:09:18,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:09:18,648 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 134 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:09:18,648 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:09:18,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076239698] [2021-06-05 21:09:18,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076239698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:18,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646766930] [2021-06-05 21:09:18,648 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 443 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 443 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:09:18,681 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-06-05 21:09:18,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:09:18,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:09:18,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:09:18,782 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 135 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:09:18,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646766930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:18,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:09:18,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 14 [2021-06-05 21:09:18,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881044743] [2021-06-05 21:09:18,782 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:09:18,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:09:18,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:09:18,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:09:18,782 INFO L87 Difference]: Start difference. First operand 14958 states and 38612 transitions. Second operand has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:19,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:09:19,035 INFO L93 Difference]: Finished difference Result 23655 states and 57376 transitions. [2021-06-05 21:09:19,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:09:19,035 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:09:19,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:09:19,062 INFO L225 Difference]: With dead ends: 23655 [2021-06-05 21:09:19,062 INFO L226 Difference]: Without dead ends: 23655 [2021-06-05 21:09:19,062 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 100.6ms TimeCoverageRelationStatistics Valid=144, Invalid=198, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:09:19,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23655 states. [2021-06-05 21:09:19,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23655 to 14973. [2021-06-05 21:09:19,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14973 states, 14972 states have (on average 2.5819529788939355) internal successors, (38657), 14972 states have internal predecessors, (38657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:19,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14973 states to 14973 states and 38657 transitions. [2021-06-05 21:09:19,317 INFO L78 Accepts]: Start accepts. Automaton has 14973 states and 38657 transitions. Word has length 59 [2021-06-05 21:09:19,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:09:19,318 INFO L482 AbstractCegarLoop]: Abstraction has 14973 states and 38657 transitions. [2021-06-05 21:09:19,318 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:19,318 INFO L276 IsEmpty]: Start isEmpty. Operand 14973 states and 38657 transitions. [2021-06-05 21:09:19,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:09:19,328 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:09:19,328 INFO L554 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:09:19,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable916,443 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:09:19,528 INFO L430 AbstractCegarLoop]: === Iteration 452 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:09:19,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:09:19,529 INFO L82 PathProgramCache]: Analyzing trace with hash -1197097272, now seen corresponding path program 126 times [2021-06-05 21:09:19,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:09:19,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670034609] [2021-06-05 21:09:19,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:09:19,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:09:19,601 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 131 proven. 46 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:09:19,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:09:19,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670034609] [2021-06-05 21:09:19,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670034609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:19,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027133365] [2021-06-05 21:09:19,602 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 444 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 444 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:09:19,633 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-06-05 21:09:19,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:09:19,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:09:19,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:09:19,735 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 132 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:09:19,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027133365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:19,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:09:19,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-06-05 21:09:19,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391697387] [2021-06-05 21:09:19,736 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:09:19,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:09:19,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:09:19,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:09:19,736 INFO L87 Difference]: Start difference. First operand 14973 states and 38657 transitions. Second operand has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:20,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:09:20,055 INFO L93 Difference]: Finished difference Result 24867 states and 60280 transitions. [2021-06-05 21:09:20,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:09:20,055 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:09:20,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:09:20,087 INFO L225 Difference]: With dead ends: 24867 [2021-06-05 21:09:20,087 INFO L226 Difference]: Without dead ends: 24867 [2021-06-05 21:09:20,088 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 123.3ms TimeCoverageRelationStatistics Valid=170, Invalid=250, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:09:20,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24867 states. [2021-06-05 21:09:20,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24867 to 15014. [2021-06-05 21:09:20,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15014 states, 15013 states have (on average 2.5834276959968028) internal successors, (38785), 15013 states have internal predecessors, (38785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:20,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15014 states to 15014 states and 38785 transitions. [2021-06-05 21:09:20,393 INFO L78 Accepts]: Start accepts. Automaton has 15014 states and 38785 transitions. Word has length 59 [2021-06-05 21:09:20,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:09:20,394 INFO L482 AbstractCegarLoop]: Abstraction has 15014 states and 38785 transitions. [2021-06-05 21:09:20,394 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:20,394 INFO L276 IsEmpty]: Start isEmpty. Operand 15014 states and 38785 transitions. [2021-06-05 21:09:20,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:09:20,404 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:09:20,404 INFO L554 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:09:20,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable917,444 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:09:20,605 INFO L430 AbstractCegarLoop]: === Iteration 453 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:09:20,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:09:20,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1407874860, now seen corresponding path program 127 times [2021-06-05 21:09:20,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:09:20,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317893437] [2021-06-05 21:09:20,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:09:20,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:09:20,687 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 118 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:09:20,688 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:09:20,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317893437] [2021-06-05 21:09:20,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317893437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:20,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492684598] [2021-06-05 21:09:20,688 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 445 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 445 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:09:20,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:09:20,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:09:20,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:09:20,805 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 119 proven. 59 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:09:20,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492684598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:20,806 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:09:20,806 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 14 [2021-06-05 21:09:20,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375354243] [2021-06-05 21:09:20,806 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:09:20,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:09:20,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:09:20,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:09:20,806 INFO L87 Difference]: Start difference. First operand 15014 states and 38785 transitions. Second operand has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:21,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:09:21,132 INFO L93 Difference]: Finished difference Result 23075 states and 56081 transitions. [2021-06-05 21:09:21,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:09:21,132 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:09:21,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:09:21,157 INFO L225 Difference]: With dead ends: 23075 [2021-06-05 21:09:21,157 INFO L226 Difference]: Without dead ends: 23075 [2021-06-05 21:09:21,157 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 142.5ms TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:09:21,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23075 states. [2021-06-05 21:09:21,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23075 to 15042. [2021-06-05 21:09:21,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15042 states, 15041 states have (on average 2.5839372382155443) internal successors, (38865), 15041 states have internal predecessors, (38865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:21,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15042 states to 15042 states and 38865 transitions. [2021-06-05 21:09:21,393 INFO L78 Accepts]: Start accepts. Automaton has 15042 states and 38865 transitions. Word has length 59 [2021-06-05 21:09:21,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:09:21,393 INFO L482 AbstractCegarLoop]: Abstraction has 15042 states and 38865 transitions. [2021-06-05 21:09:21,394 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:21,394 INFO L276 IsEmpty]: Start isEmpty. Operand 15042 states and 38865 transitions. [2021-06-05 21:09:21,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:09:21,403 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:09:21,404 INFO L554 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:09:21,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 445 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable918 [2021-06-05 21:09:21,604 INFO L430 AbstractCegarLoop]: === Iteration 454 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:09:21,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:09:21,604 INFO L82 PathProgramCache]: Analyzing trace with hash 368587848, now seen corresponding path program 128 times [2021-06-05 21:09:21,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:09:21,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813480295] [2021-06-05 21:09:21,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:09:21,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:09:21,698 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 105 proven. 73 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:09:21,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:09:21,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813480295] [2021-06-05 21:09:21,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813480295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:21,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607247325] [2021-06-05 21:09:21,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 446 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 446 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:09:21,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:09:21,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:09:21,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:09:21,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:09:21,821 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 106 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:09:21,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607247325] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:21,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:09:21,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 15 [2021-06-05 21:09:21,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541945996] [2021-06-05 21:09:21,822 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:09:21,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:09:21,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:09:21,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:09:21,822 INFO L87 Difference]: Start difference. First operand 15042 states and 38865 transitions. Second operand has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:22,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:09:22,156 INFO L93 Difference]: Finished difference Result 19432 states and 47841 transitions. [2021-06-05 21:09:22,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:09:22,157 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:09:22,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:09:22,179 INFO L225 Difference]: With dead ends: 19432 [2021-06-05 21:09:22,179 INFO L226 Difference]: Without dead ends: 19432 [2021-06-05 21:09:22,179 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 150.4ms TimeCoverageRelationStatistics Valid=188, Invalid=318, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:09:22,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19432 states. [2021-06-05 21:09:22,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19432 to 14656. [2021-06-05 21:09:22,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14656 states, 14655 states have (on average 2.5765950187649267) internal successors, (37760), 14655 states have internal predecessors, (37760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:22,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14656 states to 14656 states and 37760 transitions. [2021-06-05 21:09:22,388 INFO L78 Accepts]: Start accepts. Automaton has 14656 states and 37760 transitions. Word has length 59 [2021-06-05 21:09:22,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:09:22,388 INFO L482 AbstractCegarLoop]: Abstraction has 14656 states and 37760 transitions. [2021-06-05 21:09:22,388 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:22,389 INFO L276 IsEmpty]: Start isEmpty. Operand 14656 states and 37760 transitions. [2021-06-05 21:09:22,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:09:22,398 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:09:22,398 INFO L554 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:09:22,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 446 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable919 [2021-06-05 21:09:22,599 INFO L430 AbstractCegarLoop]: === Iteration 455 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:09:22,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:09:22,599 INFO L82 PathProgramCache]: Analyzing trace with hash -1100977316, now seen corresponding path program 268 times [2021-06-05 21:09:22,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:09:22,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448498266] [2021-06-05 21:09:22,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:09:22,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:09:22,713 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 61 proven. 117 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:09:22,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:09:22,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448498266] [2021-06-05 21:09:22,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448498266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:22,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799816709] [2021-06-05 21:09:22,713 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 447 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 447 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:09:22,740 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:09:22,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:09:22,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:09:22,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:09:22,824 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 61 proven. 117 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:09:22,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799816709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:22,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:09:22,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-05 21:09:22,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21661256] [2021-06-05 21:09:22,824 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:09:22,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:09:22,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:09:22,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:09:22,825 INFO L87 Difference]: Start difference. First operand 14656 states and 37760 transitions. Second operand has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:23,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:09:23,141 INFO L93 Difference]: Finished difference Result 16822 states and 41592 transitions. [2021-06-05 21:09:23,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:09:23,142 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:09:23,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:09:23,160 INFO L225 Difference]: With dead ends: 16822 [2021-06-05 21:09:23,160 INFO L226 Difference]: Without dead ends: 16786 [2021-06-05 21:09:23,160 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 130.8ms TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:09:23,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16786 states. [2021-06-05 21:09:23,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16786 to 14656. [2021-06-05 21:09:23,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14656 states, 14655 states have (on average 2.5757761856021837) internal successors, (37748), 14655 states have internal predecessors, (37748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:23,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14656 states to 14656 states and 37748 transitions. [2021-06-05 21:09:23,392 INFO L78 Accepts]: Start accepts. Automaton has 14656 states and 37748 transitions. Word has length 59 [2021-06-05 21:09:23,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:09:23,392 INFO L482 AbstractCegarLoop]: Abstraction has 14656 states and 37748 transitions. [2021-06-05 21:09:23,392 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:23,392 INFO L276 IsEmpty]: Start isEmpty. Operand 14656 states and 37748 transitions. [2021-06-05 21:09:23,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:09:23,401 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:09:23,401 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:09:23,602 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 447 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable920 [2021-06-05 21:09:23,602 INFO L430 AbstractCegarLoop]: === Iteration 456 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:09:23,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:09:23,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1176780123, now seen corresponding path program 129 times [2021-06-05 21:09:23,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:09:23,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329620718] [2021-06-05 21:09:23,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:09:23,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:09:23,693 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 9 proven. 165 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:09:23,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:09:23,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329620718] [2021-06-05 21:09:23,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329620718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:23,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175479595] [2021-06-05 21:09:23,693 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 448 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 448 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:09:23,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-06-05 21:09:23,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:09:23,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 21:09:23,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:09:23,809 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 166 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:09:23,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175479595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:23,810 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:09:23,810 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 21:09:23,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773449372] [2021-06-05 21:09:23,810 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:09:23,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:09:23,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:09:23,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:09:23,810 INFO L87 Difference]: Start difference. First operand 14656 states and 37748 transitions. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:24,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:09:24,328 INFO L93 Difference]: Finished difference Result 16512 states and 41427 transitions. [2021-06-05 21:09:24,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:09:24,328 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:09:24,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:09:24,347 INFO L225 Difference]: With dead ends: 16512 [2021-06-05 21:09:24,347 INFO L226 Difference]: Without dead ends: 16481 [2021-06-05 21:09:24,348 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 143.5ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:09:24,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16481 states. [2021-06-05 21:09:24,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16481 to 14732. [2021-06-05 21:09:24,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14732 states, 14731 states have (on average 2.5756567782227955) internal successors, (37942), 14731 states have internal predecessors, (37942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:24,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14732 states to 14732 states and 37942 transitions. [2021-06-05 21:09:24,574 INFO L78 Accepts]: Start accepts. Automaton has 14732 states and 37942 transitions. Word has length 59 [2021-06-05 21:09:24,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:09:24,575 INFO L482 AbstractCegarLoop]: Abstraction has 14732 states and 37942 transitions. [2021-06-05 21:09:24,575 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:24,575 INFO L276 IsEmpty]: Start isEmpty. Operand 14732 states and 37942 transitions. [2021-06-05 21:09:24,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:09:24,585 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:09:24,585 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:09:24,785 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable926,448 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:09:24,785 INFO L430 AbstractCegarLoop]: === Iteration 457 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:09:24,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:09:24,786 INFO L82 PathProgramCache]: Analyzing trace with hash -1617854181, now seen corresponding path program 269 times [2021-06-05 21:09:24,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:09:24,786 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74921042] [2021-06-05 21:09:24,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:09:24,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:09:24,870 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 20 proven. 154 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:09:24,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:09:24,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74921042] [2021-06-05 21:09:24,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74921042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:24,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086997572] [2021-06-05 21:09:24,870 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 449 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 449 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:09:24,902 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-06-05 21:09:24,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:09:24,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 21:09:24,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:09:24,996 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 159 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:09:24,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086997572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:24,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:09:24,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 21:09:24,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619173720] [2021-06-05 21:09:24,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:09:24,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:09:24,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:09:24,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:09:24,997 INFO L87 Difference]: Start difference. First operand 14732 states and 37942 transitions. Second operand has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:25,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:09:25,695 INFO L93 Difference]: Finished difference Result 15859 states and 40013 transitions. [2021-06-05 21:09:25,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:09:25,695 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:09:25,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:09:25,714 INFO L225 Difference]: With dead ends: 15859 [2021-06-05 21:09:25,714 INFO L226 Difference]: Without dead ends: 15767 [2021-06-05 21:09:25,714 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 143.9ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:09:25,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15767 states. [2021-06-05 21:09:25,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15767 to 14855. [2021-06-05 21:09:25,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14855 states, 14854 states have (on average 2.569341591490508) internal successors, (38165), 14854 states have internal predecessors, (38165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:25,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14855 states to 14855 states and 38165 transitions. [2021-06-05 21:09:25,924 INFO L78 Accepts]: Start accepts. Automaton has 14855 states and 38165 transitions. Word has length 59 [2021-06-05 21:09:25,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:09:25,924 INFO L482 AbstractCegarLoop]: Abstraction has 14855 states and 38165 transitions. [2021-06-05 21:09:25,924 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:25,924 INFO L276 IsEmpty]: Start isEmpty. Operand 14855 states and 38165 transitions. [2021-06-05 21:09:25,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:09:25,935 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:09:25,935 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:09:26,135 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable927,449 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:09:26,135 INFO L430 AbstractCegarLoop]: === Iteration 458 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:09:26,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:09:26,136 INFO L82 PathProgramCache]: Analyzing trace with hash 2063576935, now seen corresponding path program 270 times [2021-06-05 21:09:26,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:09:26,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835105915] [2021-06-05 21:09:26,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:09:26,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:09:26,227 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 155 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:09:26,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:09:26,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835105915] [2021-06-05 21:09:26,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835105915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:26,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246915027] [2021-06-05 21:09:26,227 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 450 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 450 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:09:26,258 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-06-05 21:09:26,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:09:26,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 21:09:26,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:09:26,341 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 156 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:09:26,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246915027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:26,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:09:26,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 21:09:26,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710014154] [2021-06-05 21:09:26,342 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:09:26,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:09:26,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:09:26,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:09:26,342 INFO L87 Difference]: Start difference. First operand 14855 states and 38165 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:26,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:09:26,912 INFO L93 Difference]: Finished difference Result 16568 states and 41541 transitions. [2021-06-05 21:09:26,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:09:26,913 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:09:26,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:09:26,933 INFO L225 Difference]: With dead ends: 16568 [2021-06-05 21:09:26,933 INFO L226 Difference]: Without dead ends: 16556 [2021-06-05 21:09:26,933 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 144.1ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:09:26,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16556 states. [2021-06-05 21:09:27,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16556 to 14951. [2021-06-05 21:09:27,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14951 states, 14950 states have (on average 2.568561872909699) internal successors, (38400), 14950 states have internal predecessors, (38400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:27,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14951 states to 14951 states and 38400 transitions. [2021-06-05 21:09:27,190 INFO L78 Accepts]: Start accepts. Automaton has 14951 states and 38400 transitions. Word has length 59 [2021-06-05 21:09:27,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:09:27,190 INFO L482 AbstractCegarLoop]: Abstraction has 14951 states and 38400 transitions. [2021-06-05 21:09:27,190 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:27,190 INFO L276 IsEmpty]: Start isEmpty. Operand 14951 states and 38400 transitions. [2021-06-05 21:09:27,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:09:27,200 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:09:27,201 INFO L554 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:09:27,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable928,450 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:09:27,401 INFO L430 AbstractCegarLoop]: === Iteration 459 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:09:27,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:09:27,401 INFO L82 PathProgramCache]: Analyzing trace with hash 415219432, now seen corresponding path program 271 times [2021-06-05 21:09:27,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:09:27,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677164238] [2021-06-05 21:09:27,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:09:27,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:09:27,465 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 50 proven. 126 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:09:27,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:09:27,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677164238] [2021-06-05 21:09:27,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677164238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:27,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394295701] [2021-06-05 21:09:27,466 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 451 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 451 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:09:27,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:09:27,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:09:27,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:09:27,573 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 50 proven. 126 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:09:27,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394295701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:27,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:09:27,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 21:09:27,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99312713] [2021-06-05 21:09:27,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:09:27,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:09:27,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:09:27,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:09:27,574 INFO L87 Difference]: Start difference. First operand 14951 states and 38400 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:27,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:09:27,793 INFO L93 Difference]: Finished difference Result 17530 states and 42981 transitions. [2021-06-05 21:09:27,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:09:27,793 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:09:27,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:09:27,814 INFO L225 Difference]: With dead ends: 17530 [2021-06-05 21:09:27,815 INFO L226 Difference]: Without dead ends: 17512 [2021-06-05 21:09:27,815 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 73.9ms TimeCoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:09:27,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17512 states. [2021-06-05 21:09:27,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17512 to 14926. [2021-06-05 21:09:27,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14926 states, 14925 states have (on average 2.5662311557788944) internal successors, (38301), 14925 states have internal predecessors, (38301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:28,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14926 states to 14926 states and 38301 transitions. [2021-06-05 21:09:28,020 INFO L78 Accepts]: Start accepts. Automaton has 14926 states and 38301 transitions. Word has length 59 [2021-06-05 21:09:28,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:09:28,020 INFO L482 AbstractCegarLoop]: Abstraction has 14926 states and 38301 transitions. [2021-06-05 21:09:28,020 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:28,020 INFO L276 IsEmpty]: Start isEmpty. Operand 14926 states and 38301 transitions. [2021-06-05 21:09:28,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:09:28,030 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:09:28,031 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:09:28,231 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable929,451 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:09:28,231 INFO L430 AbstractCegarLoop]: === Iteration 460 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:09:28,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:09:28,231 INFO L82 PathProgramCache]: Analyzing trace with hash -89473027, now seen corresponding path program 272 times [2021-06-05 21:09:28,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:09:28,231 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238881107] [2021-06-05 21:09:28,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:09:28,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:09:28,320 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:09:28,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:09:28,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238881107] [2021-06-05 21:09:28,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238881107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:28,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021328163] [2021-06-05 21:09:28,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 452 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 452 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:09:28,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:09:28,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:09:28,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 21:09:28,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:09:28,431 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:09:28,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021328163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:28,432 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:09:28,432 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:09:28,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3582557] [2021-06-05 21:09:28,432 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:09:28,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:09:28,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:09:28,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:09:28,432 INFO L87 Difference]: Start difference. First operand 14926 states and 38301 transitions. Second operand has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:29,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:09:29,138 INFO L93 Difference]: Finished difference Result 18642 states and 46055 transitions. [2021-06-05 21:09:29,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 21:09:29,139 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:09:29,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:09:29,160 INFO L225 Difference]: With dead ends: 18642 [2021-06-05 21:09:29,160 INFO L226 Difference]: Without dead ends: 18588 [2021-06-05 21:09:29,160 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 225.7ms TimeCoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:09:29,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18588 states. [2021-06-05 21:09:29,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18588 to 15189. [2021-06-05 21:09:29,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15189 states, 15188 states have (on average 2.568145904661575) internal successors, (39005), 15188 states have internal predecessors, (39005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:29,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15189 states to 15189 states and 39005 transitions. [2021-06-05 21:09:29,377 INFO L78 Accepts]: Start accepts. Automaton has 15189 states and 39005 transitions. Word has length 59 [2021-06-05 21:09:29,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:09:29,377 INFO L482 AbstractCegarLoop]: Abstraction has 15189 states and 39005 transitions. [2021-06-05 21:09:29,377 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:29,377 INFO L276 IsEmpty]: Start isEmpty. Operand 15189 states and 39005 transitions. [2021-06-05 21:09:29,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:09:29,387 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:09:29,387 INFO L554 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:09:29,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 452 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable932 [2021-06-05 21:09:29,588 INFO L430 AbstractCegarLoop]: === Iteration 461 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:09:29,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:09:29,588 INFO L82 PathProgramCache]: Analyzing trace with hash 1443086082, now seen corresponding path program 273 times [2021-06-05 21:09:29,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:09:29,588 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793915317] [2021-06-05 21:09:29,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:09:29,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:09:29,661 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 47 proven. 130 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:09:29,661 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:09:29,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793915317] [2021-06-05 21:09:29,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793915317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:29,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500332791] [2021-06-05 21:09:29,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 453 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 453 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:09:29,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-06-05 21:09:29,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:09:29,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:09:29,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:09:29,774 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 47 proven. 130 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:09:29,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500332791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:29,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:09:29,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-05 21:09:29,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050448745] [2021-06-05 21:09:29,775 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:09:29,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:09:29,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:09:29,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:09:29,775 INFO L87 Difference]: Start difference. First operand 15189 states and 39005 transitions. Second operand has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:30,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:09:30,039 INFO L93 Difference]: Finished difference Result 17831 states and 43702 transitions. [2021-06-05 21:09:30,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:09:30,040 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:09:30,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:09:30,063 INFO L225 Difference]: With dead ends: 17831 [2021-06-05 21:09:30,063 INFO L226 Difference]: Without dead ends: 17807 [2021-06-05 21:09:30,063 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 82.4ms TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:09:30,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17807 states. [2021-06-05 21:09:30,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17807 to 15189. [2021-06-05 21:09:30,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15189 states, 15188 states have (on average 2.5672241243086646) internal successors, (38991), 15188 states have internal predecessors, (38991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:30,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15189 states to 15189 states and 38991 transitions. [2021-06-05 21:09:30,374 INFO L78 Accepts]: Start accepts. Automaton has 15189 states and 38991 transitions. Word has length 59 [2021-06-05 21:09:30,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:09:30,374 INFO L482 AbstractCegarLoop]: Abstraction has 15189 states and 38991 transitions. [2021-06-05 21:09:30,374 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:30,374 INFO L276 IsEmpty]: Start isEmpty. Operand 15189 states and 38991 transitions. [2021-06-05 21:09:30,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:09:30,383 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:09:30,383 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:09:30,583 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable933,453 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:09:30,583 INFO L430 AbstractCegarLoop]: === Iteration 462 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:09:30,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:09:30,583 INFO L82 PathProgramCache]: Analyzing trace with hash 65363507, now seen corresponding path program 274 times [2021-06-05 21:09:30,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:09:30,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008348673] [2021-06-05 21:09:30,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:09:30,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:09:30,689 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:09:30,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:09:30,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008348673] [2021-06-05 21:09:30,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008348673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:30,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641994764] [2021-06-05 21:09:30,689 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 454 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 454 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:09:30,717 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:09:30,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:09:30,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 21:09:30,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:09:30,801 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:09:30,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641994764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:30,802 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:09:30,802 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 21:09:30,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776624925] [2021-06-05 21:09:30,802 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:09:30,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:09:30,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:09:30,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:09:30,802 INFO L87 Difference]: Start difference. First operand 15189 states and 38991 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:31,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:09:31,812 INFO L93 Difference]: Finished difference Result 23093 states and 55993 transitions. [2021-06-05 21:09:31,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 21:09:31,812 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:09:31,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:09:31,838 INFO L225 Difference]: With dead ends: 23093 [2021-06-05 21:09:31,838 INFO L226 Difference]: Without dead ends: 22913 [2021-06-05 21:09:31,839 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 398.8ms TimeCoverageRelationStatistics Valid=231, Invalid=1749, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 21:09:31,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22913 states. [2021-06-05 21:09:32,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22913 to 15680. [2021-06-05 21:09:32,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15680 states, 15679 states have (on average 2.568403597168187) internal successors, (40270), 15679 states have internal predecessors, (40270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:32,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15680 states to 15680 states and 40270 transitions. [2021-06-05 21:09:32,084 INFO L78 Accepts]: Start accepts. Automaton has 15680 states and 40270 transitions. Word has length 59 [2021-06-05 21:09:32,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:09:32,084 INFO L482 AbstractCegarLoop]: Abstraction has 15680 states and 40270 transitions. [2021-06-05 21:09:32,084 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:32,084 INFO L276 IsEmpty]: Start isEmpty. Operand 15680 states and 40270 transitions. [2021-06-05 21:09:32,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:09:32,094 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:09:32,094 INFO L554 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:09:32,294 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable937,454 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:09:32,294 INFO L430 AbstractCegarLoop]: === Iteration 463 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:09:32,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:09:32,294 INFO L82 PathProgramCache]: Analyzing trace with hash 451966184, now seen corresponding path program 275 times [2021-06-05 21:09:32,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:09:32,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808970598] [2021-06-05 21:09:32,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:09:32,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:09:32,375 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 45 proven. 132 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:09:32,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:09:32,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808970598] [2021-06-05 21:09:32,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808970598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:32,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821412133] [2021-06-05 21:09:32,375 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 455 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 455 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:09:32,406 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-05 21:09:32,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:09:32,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:09:32,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:09:32,514 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 46 proven. 132 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:09:32,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821412133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:32,514 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:09:32,514 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 17 [2021-06-05 21:09:32,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494154422] [2021-06-05 21:09:32,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:09:32,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:09:32,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:09:32,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:09:32,515 INFO L87 Difference]: Start difference. First operand 15680 states and 40270 transitions. Second operand has 18 states, 18 states have (on average 4.388888888888889) internal successors, (79), 17 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:32,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:09:32,790 INFO L93 Difference]: Finished difference Result 18578 states and 45476 transitions. [2021-06-05 21:09:32,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:09:32,791 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.388888888888889) internal successors, (79), 17 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:09:32,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:09:32,810 INFO L225 Difference]: With dead ends: 18578 [2021-06-05 21:09:32,810 INFO L226 Difference]: Without dead ends: 18545 [2021-06-05 21:09:32,811 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 128.5ms TimeCoverageRelationStatistics Valid=127, Invalid=335, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:09:32,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18545 states. [2021-06-05 21:09:32,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18545 to 15680. [2021-06-05 21:09:33,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15680 states, 15679 states have (on average 2.567829580968174) internal successors, (40261), 15679 states have internal predecessors, (40261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:33,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15680 states to 15680 states and 40261 transitions. [2021-06-05 21:09:33,027 INFO L78 Accepts]: Start accepts. Automaton has 15680 states and 40261 transitions. Word has length 59 [2021-06-05 21:09:33,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:09:33,027 INFO L482 AbstractCegarLoop]: Abstraction has 15680 states and 40261 transitions. [2021-06-05 21:09:33,027 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.388888888888889) internal successors, (79), 17 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:33,027 INFO L276 IsEmpty]: Start isEmpty. Operand 15680 states and 40261 transitions. [2021-06-05 21:09:33,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:09:33,038 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:09:33,038 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:09:33,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable938,455 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:09:33,245 INFO L430 AbstractCegarLoop]: === Iteration 464 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:09:33,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:09:33,245 INFO L82 PathProgramCache]: Analyzing trace with hash 5671997, now seen corresponding path program 276 times [2021-06-05 21:09:33,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:09:33,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358473499] [2021-06-05 21:09:33,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:09:33,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:09:33,357 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:09:33,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:09:33,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358473499] [2021-06-05 21:09:33,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358473499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:33,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465948957] [2021-06-05 21:09:33,358 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 456 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 456 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:09:33,391 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-06-05 21:09:33,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:09:33,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 21:09:33,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:09:33,478 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:09:33,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465948957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:33,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:09:33,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:09:33,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775112315] [2021-06-05 21:09:33,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:09:33,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:09:33,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:09:33,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:09:33,479 INFO L87 Difference]: Start difference. First operand 15680 states and 40261 transitions. Second operand has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:34,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:09:34,929 INFO L93 Difference]: Finished difference Result 28722 states and 68889 transitions. [2021-06-05 21:09:34,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 21:09:34,929 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:09:34,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:09:34,965 INFO L225 Difference]: With dead ends: 28722 [2021-06-05 21:09:34,965 INFO L226 Difference]: Without dead ends: 28446 [2021-06-05 21:09:34,966 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1479 ImplicationChecksByTransitivity, 752.6ms TimeCoverageRelationStatistics Valid=501, Invalid=4191, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 21:09:34,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28446 states. [2021-06-05 21:09:35,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28446 to 16072. [2021-06-05 21:09:35,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16072 states, 16071 states have (on average 2.5689129487897455) internal successors, (41285), 16071 states have internal predecessors, (41285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:35,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16072 states to 16072 states and 41285 transitions. [2021-06-05 21:09:35,275 INFO L78 Accepts]: Start accepts. Automaton has 16072 states and 41285 transitions. Word has length 59 [2021-06-05 21:09:35,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:09:35,275 INFO L482 AbstractCegarLoop]: Abstraction has 16072 states and 41285 transitions. [2021-06-05 21:09:35,275 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:35,275 INFO L276 IsEmpty]: Start isEmpty. Operand 16072 states and 41285 transitions. [2021-06-05 21:09:35,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:09:35,286 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:09:35,286 INFO L554 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:09:35,486 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 456 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable943 [2021-06-05 21:09:35,486 INFO L430 AbstractCegarLoop]: === Iteration 465 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:09:35,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:09:35,486 INFO L82 PathProgramCache]: Analyzing trace with hash 1899244866, now seen corresponding path program 277 times [2021-06-05 21:09:35,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:09:35,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870939754] [2021-06-05 21:09:35,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:09:35,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:09:35,579 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 49 proven. 128 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:09:35,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:09:35,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870939754] [2021-06-05 21:09:35,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870939754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:35,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512444393] [2021-06-05 21:09:35,580 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 457 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 457 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:09:35,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:09:35,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:09:35,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:09:35,692 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 49 proven. 128 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:09:35,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512444393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:35,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:09:35,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-05 21:09:35,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751660983] [2021-06-05 21:09:35,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:09:35,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:09:35,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:09:35,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:09:35,693 INFO L87 Difference]: Start difference. First operand 16072 states and 41285 transitions. Second operand has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:36,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:09:36,014 INFO L93 Difference]: Finished difference Result 18886 states and 46305 transitions. [2021-06-05 21:09:36,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:09:36,014 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:09:36,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:09:36,037 INFO L225 Difference]: With dead ends: 18886 [2021-06-05 21:09:36,037 INFO L226 Difference]: Without dead ends: 18844 [2021-06-05 21:09:36,037 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 121.5ms TimeCoverageRelationStatistics Valid=119, Invalid=261, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:09:36,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18844 states. [2021-06-05 21:09:36,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18844 to 15745. [2021-06-05 21:09:36,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15745 states, 15744 states have (on average 2.5645960365853657) internal successors, (40377), 15744 states have internal predecessors, (40377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:36,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15745 states to 15745 states and 40377 transitions. [2021-06-05 21:09:36,276 INFO L78 Accepts]: Start accepts. Automaton has 15745 states and 40377 transitions. Word has length 59 [2021-06-05 21:09:36,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:09:36,276 INFO L482 AbstractCegarLoop]: Abstraction has 15745 states and 40377 transitions. [2021-06-05 21:09:36,276 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:36,276 INFO L276 IsEmpty]: Start isEmpty. Operand 15745 states and 40377 transitions. [2021-06-05 21:09:36,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:09:36,287 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:09:36,287 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:09:36,487 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 457 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable944 [2021-06-05 21:09:36,487 INFO L430 AbstractCegarLoop]: === Iteration 466 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:09:36,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:09:36,488 INFO L82 PathProgramCache]: Analyzing trace with hash -147641869, now seen corresponding path program 278 times [2021-06-05 21:09:36,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:09:36,488 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341893886] [2021-06-05 21:09:36,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:09:36,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:09:36,613 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:09:36,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:09:36,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341893886] [2021-06-05 21:09:36,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341893886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:36,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184665162] [2021-06-05 21:09:36,614 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 458 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 458 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:09:36,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:09:36,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:09:36,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 21:09:36,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:09:36,724 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:09:36,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184665162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:36,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:09:36,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 21:09:36,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084439394] [2021-06-05 21:09:36,725 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:09:36,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:09:36,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:09:36,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:09:36,725 INFO L87 Difference]: Start difference. First operand 15745 states and 40377 transitions. Second operand has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:37,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:09:37,535 INFO L93 Difference]: Finished difference Result 22153 states and 53662 transitions. [2021-06-05 21:09:37,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:09:37,535 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:09:37,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:09:37,561 INFO L225 Difference]: With dead ends: 22153 [2021-06-05 21:09:37,562 INFO L226 Difference]: Without dead ends: 21775 [2021-06-05 21:09:37,562 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 302.3ms TimeCoverageRelationStatistics Valid=144, Invalid=848, Unknown=0, NotChecked=0, Total=992 [2021-06-05 21:09:37,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21775 states. [2021-06-05 21:09:37,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21775 to 14506. [2021-06-05 21:09:37,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14506 states, 14505 states have (on average 2.5544295070665286) internal successors, (37052), 14505 states have internal predecessors, (37052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:37,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14506 states to 14506 states and 37052 transitions. [2021-06-05 21:09:37,836 INFO L78 Accepts]: Start accepts. Automaton has 14506 states and 37052 transitions. Word has length 59 [2021-06-05 21:09:37,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:09:37,837 INFO L482 AbstractCegarLoop]: Abstraction has 14506 states and 37052 transitions. [2021-06-05 21:09:37,837 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:37,837 INFO L276 IsEmpty]: Start isEmpty. Operand 14506 states and 37052 transitions. [2021-06-05 21:09:37,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:09:37,847 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:09:37,847 INFO L554 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:09:38,047 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 458 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable950 [2021-06-05 21:09:38,047 INFO L430 AbstractCegarLoop]: === Iteration 467 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:09:38,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:09:38,048 INFO L82 PathProgramCache]: Analyzing trace with hash -385703386, now seen corresponding path program 130 times [2021-06-05 21:09:38,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:09:38,048 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263331764] [2021-06-05 21:09:38,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:09:38,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:09:38,112 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 138 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:09:38,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:09:38,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263331764] [2021-06-05 21:09:38,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263331764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:38,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116438752] [2021-06-05 21:09:38,112 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 459 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 459 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:09:38,140 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:09:38,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:09:38,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:09:38,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:09:38,226 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 139 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:09:38,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116438752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:38,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:09:38,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 12 [2021-06-05 21:09:38,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403663136] [2021-06-05 21:09:38,226 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:09:38,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:09:38,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:09:38,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=91, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:09:38,227 INFO L87 Difference]: Start difference. First operand 14506 states and 37052 transitions. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:38,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:09:38,450 INFO L93 Difference]: Finished difference Result 18216 states and 44603 transitions. [2021-06-05 21:09:38,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:09:38,451 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:09:38,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:09:38,469 INFO L225 Difference]: With dead ends: 18216 [2021-06-05 21:09:38,469 INFO L226 Difference]: Without dead ends: 18202 [2021-06-05 21:09:38,469 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 70.4ms TimeCoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:09:38,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18202 states. [2021-06-05 21:09:38,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18202 to 14941. [2021-06-05 21:09:38,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14941 states, 14940 states have (on average 2.5593038821954486) internal successors, (38236), 14940 states have internal predecessors, (38236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:38,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14941 states to 14941 states and 38236 transitions. [2021-06-05 21:09:38,679 INFO L78 Accepts]: Start accepts. Automaton has 14941 states and 38236 transitions. Word has length 59 [2021-06-05 21:09:38,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:09:38,679 INFO L482 AbstractCegarLoop]: Abstraction has 14941 states and 38236 transitions. [2021-06-05 21:09:38,679 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:38,679 INFO L276 IsEmpty]: Start isEmpty. Operand 14941 states and 38236 transitions. [2021-06-05 21:09:38,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:09:38,689 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:09:38,689 INFO L554 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:09:38,889 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable951,459 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:09:38,889 INFO L430 AbstractCegarLoop]: === Iteration 468 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:09:38,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:09:38,890 INFO L82 PathProgramCache]: Analyzing trace with hash -1007583796, now seen corresponding path program 131 times [2021-06-05 21:09:38,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:09:38,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194783630] [2021-06-05 21:09:38,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:09:38,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:09:38,954 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 138 proven. 39 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:09:38,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:09:38,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194783630] [2021-06-05 21:09:38,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194783630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:38,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573872122] [2021-06-05 21:09:38,955 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 460 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 460 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:09:38,989 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-06-05 21:09:38,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:09:38,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:09:38,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:09:39,091 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 139 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:09:39,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573872122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:39,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:09:39,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 14 [2021-06-05 21:09:39,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042635540] [2021-06-05 21:09:39,091 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:09:39,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:09:39,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:09:39,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=123, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:09:39,092 INFO L87 Difference]: Start difference. First operand 14941 states and 38236 transitions. Second operand has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:39,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:09:39,365 INFO L93 Difference]: Finished difference Result 23419 states and 56616 transitions. [2021-06-05 21:09:39,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:09:39,365 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:09:39,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:09:39,390 INFO L225 Difference]: With dead ends: 23419 [2021-06-05 21:09:39,390 INFO L226 Difference]: Without dead ends: 23419 [2021-06-05 21:09:39,390 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 110.0ms TimeCoverageRelationStatistics Valid=162, Invalid=218, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:09:39,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23419 states. [2021-06-05 21:09:39,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23419 to 14952. [2021-06-05 21:09:39,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14952 states, 14951 states have (on average 2.5596281185205) internal successors, (38269), 14951 states have internal predecessors, (38269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:39,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14952 states to 14952 states and 38269 transitions. [2021-06-05 21:09:39,630 INFO L78 Accepts]: Start accepts. Automaton has 14952 states and 38269 transitions. Word has length 59 [2021-06-05 21:09:39,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:09:39,630 INFO L482 AbstractCegarLoop]: Abstraction has 14952 states and 38269 transitions. [2021-06-05 21:09:39,630 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:39,630 INFO L276 IsEmpty]: Start isEmpty. Operand 14952 states and 38269 transitions. [2021-06-05 21:09:39,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:09:39,639 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:09:39,639 INFO L554 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:09:39,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable953,460 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:09:39,840 INFO L430 AbstractCegarLoop]: === Iteration 469 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:09:39,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:09:39,840 INFO L82 PathProgramCache]: Analyzing trace with hash 1649811044, now seen corresponding path program 132 times [2021-06-05 21:09:39,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:09:39,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456079189] [2021-06-05 21:09:39,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:09:39,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:09:39,919 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 136 proven. 41 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:09:39,920 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:09:39,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456079189] [2021-06-05 21:09:39,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456079189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:39,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749852815] [2021-06-05 21:09:39,920 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 461 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 461 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:09:39,953 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-06-05 21:09:39,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:09:39,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:09:39,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:09:40,045 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 137 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:09:40,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749852815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:40,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:09:40,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-06-05 21:09:40,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018502313] [2021-06-05 21:09:40,045 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:09:40,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:09:40,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:09:40,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:09:40,045 INFO L87 Difference]: Start difference. First operand 14952 states and 38269 transitions. Second operand has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:40,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:09:40,387 INFO L93 Difference]: Finished difference Result 25599 states and 61804 transitions. [2021-06-05 21:09:40,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:09:40,388 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:09:40,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:09:40,421 INFO L225 Difference]: With dead ends: 25599 [2021-06-05 21:09:40,421 INFO L226 Difference]: Without dead ends: 25599 [2021-06-05 21:09:40,421 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 145.3ms TimeCoverageRelationStatistics Valid=203, Invalid=303, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:09:40,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25599 states. [2021-06-05 21:09:40,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25599 to 14991. [2021-06-05 21:09:40,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14991 states, 14990 states have (on average 2.561307538358906) internal successors, (38394), 14990 states have internal predecessors, (38394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:40,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14991 states to 14991 states and 38394 transitions. [2021-06-05 21:09:40,691 INFO L78 Accepts]: Start accepts. Automaton has 14991 states and 38394 transitions. Word has length 59 [2021-06-05 21:09:40,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:09:40,691 INFO L482 AbstractCegarLoop]: Abstraction has 14991 states and 38394 transitions. [2021-06-05 21:09:40,691 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:40,691 INFO L276 IsEmpty]: Start isEmpty. Operand 14991 states and 38394 transitions. [2021-06-05 21:09:40,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:09:40,702 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:09:40,702 INFO L554 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:09:40,902 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 461 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable954 [2021-06-05 21:09:40,902 INFO L430 AbstractCegarLoop]: === Iteration 470 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:09:40,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:09:40,903 INFO L82 PathProgramCache]: Analyzing trace with hash -40184120, now seen corresponding path program 133 times [2021-06-05 21:09:40,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:09:40,903 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723238453] [2021-06-05 21:09:40,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:09:40,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:09:41,055 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 126 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:09:41,055 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:09:41,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723238453] [2021-06-05 21:09:41,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723238453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:41,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033478210] [2021-06-05 21:09:41,056 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 462 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 462 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:09:41,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:09:41,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:09:41,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:09:41,174 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 127 proven. 51 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:09:41,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033478210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:41,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:09:41,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 14 [2021-06-05 21:09:41,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047982073] [2021-06-05 21:09:41,174 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:09:41,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:09:41,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:09:41,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:09:41,174 INFO L87 Difference]: Start difference. First operand 14991 states and 38394 transitions. Second operand has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:41,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:09:41,625 INFO L93 Difference]: Finished difference Result 25335 states and 61221 transitions. [2021-06-05 21:09:41,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:09:41,626 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:09:41,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:09:41,656 INFO L225 Difference]: With dead ends: 25335 [2021-06-05 21:09:41,656 INFO L226 Difference]: Without dead ends: 25335 [2021-06-05 21:09:41,656 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 241.1ms TimeCoverageRelationStatistics Valid=254, Invalid=396, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:09:41,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25335 states. [2021-06-05 21:09:41,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25335 to 15025. [2021-06-05 21:09:41,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15025 states, 15024 states have (on average 2.562433439829606) internal successors, (38498), 15024 states have internal predecessors, (38498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:41,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15025 states to 15025 states and 38498 transitions. [2021-06-05 21:09:41,900 INFO L78 Accepts]: Start accepts. Automaton has 15025 states and 38498 transitions. Word has length 59 [2021-06-05 21:09:41,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:09:41,900 INFO L482 AbstractCegarLoop]: Abstraction has 15025 states and 38498 transitions. [2021-06-05 21:09:41,900 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:41,901 INFO L276 IsEmpty]: Start isEmpty. Operand 15025 states and 38498 transitions. [2021-06-05 21:09:41,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:09:41,910 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:09:41,910 INFO L554 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:09:42,110 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 462 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable955 [2021-06-05 21:09:42,110 INFO L430 AbstractCegarLoop]: === Iteration 471 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:09:42,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:09:42,111 INFO L82 PathProgramCache]: Analyzing trace with hash -1079471132, now seen corresponding path program 134 times [2021-06-05 21:09:42,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:09:42,111 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529350222] [2021-06-05 21:09:42,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:09:42,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:09:42,206 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 116 proven. 61 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:09:42,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:09:42,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529350222] [2021-06-05 21:09:42,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529350222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:42,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722739286] [2021-06-05 21:09:42,206 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 463 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 463 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:09:42,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:09:42,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:09:42,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:09:42,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:09:42,326 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 117 proven. 61 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:09:42,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722739286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:42,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:09:42,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 15 [2021-06-05 21:09:42,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291252795] [2021-06-05 21:09:42,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:09:42,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:09:42,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:09:42,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:09:42,327 INFO L87 Difference]: Start difference. First operand 15025 states and 38498 transitions. Second operand has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:42,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:09:42,705 INFO L93 Difference]: Finished difference Result 22714 states and 55093 transitions. [2021-06-05 21:09:42,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:09:42,705 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:09:42,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:09:42,728 INFO L225 Difference]: With dead ends: 22714 [2021-06-05 21:09:42,729 INFO L226 Difference]: Without dead ends: 22714 [2021-06-05 21:09:42,729 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 188.7ms TimeCoverageRelationStatistics Valid=268, Invalid=434, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:09:42,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22714 states. [2021-06-05 21:09:42,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22714 to 15046. [2021-06-05 21:09:42,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15046 states, 15045 states have (on average 2.5626453971419076) internal successors, (38555), 15045 states have internal predecessors, (38555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:42,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15046 states to 15046 states and 38555 transitions. [2021-06-05 21:09:42,956 INFO L78 Accepts]: Start accepts. Automaton has 15046 states and 38555 transitions. Word has length 59 [2021-06-05 21:09:42,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:09:42,956 INFO L482 AbstractCegarLoop]: Abstraction has 15046 states and 38555 transitions. [2021-06-05 21:09:42,956 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:42,956 INFO L276 IsEmpty]: Start isEmpty. Operand 15046 states and 38555 transitions. [2021-06-05 21:09:42,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:09:42,966 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:09:42,966 INFO L554 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:09:43,166 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable956,463 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:09:43,167 INFO L430 AbstractCegarLoop]: === Iteration 472 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:09:43,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:09:43,167 INFO L82 PathProgramCache]: Analyzing trace with hash -59608760, now seen corresponding path program 135 times [2021-06-05 21:09:43,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:09:43,167 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361439699] [2021-06-05 21:09:43,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:09:43,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:09:43,274 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 106 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:09:43,274 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:09:43,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361439699] [2021-06-05 21:09:43,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361439699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:43,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005753868] [2021-06-05 21:09:43,275 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 464 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 464 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:09:43,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-06-05 21:09:43,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:09:43,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:09:43,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:09:43,399 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 107 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:09:43,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005753868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:43,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:09:43,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 16 [2021-06-05 21:09:43,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304874694] [2021-06-05 21:09:43,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:09:43,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:09:43,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:09:43,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:09:43,400 INFO L87 Difference]: Start difference. First operand 15046 states and 38555 transitions. Second operand has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 16 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:43,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:09:43,780 INFO L93 Difference]: Finished difference Result 18929 states and 46502 transitions. [2021-06-05 21:09:43,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:09:43,780 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 16 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:09:43,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:09:43,800 INFO L225 Difference]: With dead ends: 18929 [2021-06-05 21:09:43,800 INFO L226 Difference]: Without dead ends: 18929 [2021-06-05 21:09:43,800 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 186.1ms TimeCoverageRelationStatistics Valid=236, Invalid=414, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:09:43,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18929 states. [2021-06-05 21:09:43,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18929 to 14402. [2021-06-05 21:09:43,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14402 states, 14401 states have (on average 2.552669953475453) internal successors, (36761), 14401 states have internal predecessors, (36761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:44,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14402 states to 14402 states and 36761 transitions. [2021-06-05 21:09:44,018 INFO L78 Accepts]: Start accepts. Automaton has 14402 states and 36761 transitions. Word has length 59 [2021-06-05 21:09:44,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:09:44,018 INFO L482 AbstractCegarLoop]: Abstraction has 14402 states and 36761 transitions. [2021-06-05 21:09:44,018 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 16 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:44,018 INFO L276 IsEmpty]: Start isEmpty. Operand 14402 states and 36761 transitions. [2021-06-05 21:09:44,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:09:44,100 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:09:44,100 INFO L554 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:09:44,301 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 464 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable957 [2021-06-05 21:09:44,301 INFO L430 AbstractCegarLoop]: === Iteration 473 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:09:44,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:09:44,301 INFO L82 PathProgramCache]: Analyzing trace with hash 601775784, now seen corresponding path program 279 times [2021-06-05 21:09:44,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:09:44,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369675732] [2021-06-05 21:09:44,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:09:44,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:09:44,404 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 60 proven. 118 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:09:44,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:09:44,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369675732] [2021-06-05 21:09:44,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369675732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:44,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267735074] [2021-06-05 21:09:44,404 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 465 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 465 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:09:44,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 21:09:44,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:09:44,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:09:44,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:09:44,519 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 60 proven. 118 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:09:44,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267735074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:44,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:09:44,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-06-05 21:09:44,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608553476] [2021-06-05 21:09:44,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:09:44,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:09:44,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:09:44,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:09:44,520 INFO L87 Difference]: Start difference. First operand 14402 states and 36761 transitions. Second operand has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:44,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:09:44,825 INFO L93 Difference]: Finished difference Result 16717 states and 40878 transitions. [2021-06-05 21:09:44,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:09:44,825 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:09:44,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:09:44,841 INFO L225 Difference]: With dead ends: 16717 [2021-06-05 21:09:44,841 INFO L226 Difference]: Without dead ends: 16672 [2021-06-05 21:09:44,842 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 142.2ms TimeCoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:09:44,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16672 states. [2021-06-05 21:09:44,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16672 to 14402. [2021-06-05 21:09:45,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14402 states, 14401 states have (on average 2.552044996875217) internal successors, (36752), 14401 states have internal predecessors, (36752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:45,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14402 states to 14402 states and 36752 transitions. [2021-06-05 21:09:45,034 INFO L78 Accepts]: Start accepts. Automaton has 14402 states and 36752 transitions. Word has length 59 [2021-06-05 21:09:45,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:09:45,034 INFO L482 AbstractCegarLoop]: Abstraction has 14402 states and 36752 transitions. [2021-06-05 21:09:45,034 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:45,034 INFO L276 IsEmpty]: Start isEmpty. Operand 14402 states and 36752 transitions. [2021-06-05 21:09:45,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:09:45,044 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:09:45,044 INFO L554 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:09:45,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable958,465 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:09:45,244 INFO L430 AbstractCegarLoop]: === Iteration 474 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:09:45,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:09:45,244 INFO L82 PathProgramCache]: Analyzing trace with hash 972677468, now seen corresponding path program 280 times [2021-06-05 21:09:45,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:09:45,244 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186378850] [2021-06-05 21:09:45,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:09:45,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:09:45,311 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 66 proven. 108 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:09:45,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:09:45,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186378850] [2021-06-05 21:09:45,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186378850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:45,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53136993] [2021-06-05 21:09:45,311 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 466 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 466 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:09:45,340 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:09:45,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:09:45,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:09:45,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:09:45,421 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 66 proven. 108 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:09:45,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53136993] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:45,421 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:09:45,421 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 21:09:45,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164510398] [2021-06-05 21:09:45,421 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:09:45,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:09:45,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:09:45,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:09:45,422 INFO L87 Difference]: Start difference. First operand 14402 states and 36752 transitions. Second operand has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:45,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:09:45,586 INFO L93 Difference]: Finished difference Result 17320 states and 42003 transitions. [2021-06-05 21:09:45,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:09:45,586 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:09:45,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:09:45,604 INFO L225 Difference]: With dead ends: 17320 [2021-06-05 21:09:45,604 INFO L226 Difference]: Without dead ends: 17317 [2021-06-05 21:09:45,604 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 57.9ms TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:09:45,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17317 states. [2021-06-05 21:09:45,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17317 to 14390. [2021-06-05 21:09:45,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14390 states, 14389 states have (on average 2.5509069428035303) internal successors, (36705), 14389 states have internal predecessors, (36705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:45,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14390 states to 14390 states and 36705 transitions. [2021-06-05 21:09:45,807 INFO L78 Accepts]: Start accepts. Automaton has 14390 states and 36705 transitions. Word has length 59 [2021-06-05 21:09:45,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:09:45,807 INFO L482 AbstractCegarLoop]: Abstraction has 14390 states and 36705 transitions. [2021-06-05 21:09:45,807 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:45,807 INFO L276 IsEmpty]: Start isEmpty. Operand 14390 states and 36705 transitions. [2021-06-05 21:09:45,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:09:45,817 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:09:45,817 INFO L554 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:09:46,017 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 466 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable965 [2021-06-05 21:09:46,017 INFO L430 AbstractCegarLoop]: === Iteration 475 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:09:46,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:09:46,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1179740034, now seen corresponding path program 281 times [2021-06-05 21:09:46,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:09:46,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402526915] [2021-06-05 21:09:46,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:09:46,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:09:46,084 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 59 proven. 115 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:09:46,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:09:46,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402526915] [2021-06-05 21:09:46,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402526915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:46,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479047668] [2021-06-05 21:09:46,085 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 467 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 467 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:09:46,118 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-06-05 21:09:46,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:09:46,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:09:46,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:09:46,217 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 63 proven. 115 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:09:46,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479047668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:46,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:09:46,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 14 [2021-06-05 21:09:46,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969911831] [2021-06-05 21:09:46,218 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:09:46,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:09:46,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:09:46,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:09:46,218 INFO L87 Difference]: Start difference. First operand 14390 states and 36705 transitions. Second operand has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:46,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:09:46,439 INFO L93 Difference]: Finished difference Result 17479 states and 42286 transitions. [2021-06-05 21:09:46,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:09:46,439 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:09:46,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:09:46,459 INFO L225 Difference]: With dead ends: 17479 [2021-06-05 21:09:46,459 INFO L226 Difference]: Without dead ends: 17461 [2021-06-05 21:09:46,459 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 96.7ms TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:09:46,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17461 states. [2021-06-05 21:09:46,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17461 to 14390. [2021-06-05 21:09:46,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14390 states, 14389 states have (on average 2.549308499548266) internal successors, (36682), 14389 states have internal predecessors, (36682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:46,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14390 states to 14390 states and 36682 transitions. [2021-06-05 21:09:46,680 INFO L78 Accepts]: Start accepts. Automaton has 14390 states and 36682 transitions. Word has length 59 [2021-06-05 21:09:46,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:09:46,680 INFO L482 AbstractCegarLoop]: Abstraction has 14390 states and 36682 transitions. [2021-06-05 21:09:46,680 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:46,680 INFO L276 IsEmpty]: Start isEmpty. Operand 14390 states and 36682 transitions. [2021-06-05 21:09:46,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:09:46,690 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:09:46,690 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:09:46,890 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable967,467 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:09:46,891 INFO L430 AbstractCegarLoop]: === Iteration 476 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:09:46,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:09:46,891 INFO L82 PathProgramCache]: Analyzing trace with hash -268259979, now seen corresponding path program 282 times [2021-06-05 21:09:46,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:09:46,891 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590200567] [2021-06-05 21:09:46,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:09:46,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:09:46,978 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 20 proven. 154 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:09:46,978 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:09:46,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590200567] [2021-06-05 21:09:46,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590200567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:46,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563113814] [2021-06-05 21:09:46,979 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 468 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 468 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:09:47,014 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-06-05 21:09:47,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:09:47,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 21:09:47,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:09:47,120 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 159 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:09:47,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563113814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:47,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:09:47,121 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 21:09:47,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703752703] [2021-06-05 21:09:47,121 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:09:47,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:09:47,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:09:47,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:09:47,121 INFO L87 Difference]: Start difference. First operand 14390 states and 36682 transitions. Second operand has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:47,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:09:47,872 INFO L93 Difference]: Finished difference Result 16064 states and 39766 transitions. [2021-06-05 21:09:47,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:09:47,873 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:09:47,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:09:47,889 INFO L225 Difference]: With dead ends: 16064 [2021-06-05 21:09:47,889 INFO L226 Difference]: Without dead ends: 15797 [2021-06-05 21:09:47,889 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 149.6ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:09:47,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15797 states. [2021-06-05 21:09:48,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15797 to 14403. [2021-06-05 21:09:48,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14403 states, 14402 states have (on average 2.540411054020275) internal successors, (36587), 14402 states have internal predecessors, (36587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:48,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14403 states to 14403 states and 36587 transitions. [2021-06-05 21:09:48,093 INFO L78 Accepts]: Start accepts. Automaton has 14403 states and 36587 transitions. Word has length 59 [2021-06-05 21:09:48,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:09:48,093 INFO L482 AbstractCegarLoop]: Abstraction has 14403 states and 36587 transitions. [2021-06-05 21:09:48,093 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:48,093 INFO L276 IsEmpty]: Start isEmpty. Operand 14403 states and 36587 transitions. [2021-06-05 21:09:48,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:09:48,103 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:09:48,103 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:09:48,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 468 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable970 [2021-06-05 21:09:48,304 INFO L430 AbstractCegarLoop]: === Iteration 477 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:09:48,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:09:48,304 INFO L82 PathProgramCache]: Analyzing trace with hash -881796159, now seen corresponding path program 283 times [2021-06-05 21:09:48,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:09:48,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355283455] [2021-06-05 21:09:48,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:09:48,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:09:48,413 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 155 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:09:48,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:09:48,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355283455] [2021-06-05 21:09:48,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355283455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:48,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681102158] [2021-06-05 21:09:48,413 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 469 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 469 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:09:48,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:09:48,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 21:09:48,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:09:48,528 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 156 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:09:48,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681102158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:48,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:09:48,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 21:09:48,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280006834] [2021-06-05 21:09:48,529 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:09:48,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:09:48,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:09:48,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:09:48,529 INFO L87 Difference]: Start difference. First operand 14403 states and 36587 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:49,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:09:49,087 INFO L93 Difference]: Finished difference Result 16239 states and 40254 transitions. [2021-06-05 21:09:49,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:09:49,087 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:09:49,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:09:49,104 INFO L225 Difference]: With dead ends: 16239 [2021-06-05 21:09:49,104 INFO L226 Difference]: Without dead ends: 16227 [2021-06-05 21:09:49,104 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 159.4ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:09:49,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16227 states. [2021-06-05 21:09:49,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16227 to 14558. [2021-06-05 21:09:49,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14558 states, 14557 states have (on average 2.540221199422958) internal successors, (36978), 14557 states have internal predecessors, (36978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:49,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14558 states to 14558 states and 36978 transitions. [2021-06-05 21:09:49,306 INFO L78 Accepts]: Start accepts. Automaton has 14558 states and 36978 transitions. Word has length 59 [2021-06-05 21:09:49,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:09:49,306 INFO L482 AbstractCegarLoop]: Abstraction has 14558 states and 36978 transitions. [2021-06-05 21:09:49,306 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:49,306 INFO L276 IsEmpty]: Start isEmpty. Operand 14558 states and 36978 transitions. [2021-06-05 21:09:49,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:09:49,317 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:09:49,317 INFO L554 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:09:49,517 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable971,469 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:09:49,517 INFO L430 AbstractCegarLoop]: === Iteration 478 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:09:49,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:09:49,518 INFO L82 PathProgramCache]: Analyzing trace with hash -1039095646, now seen corresponding path program 136 times [2021-06-05 21:09:49,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:09:49,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416328443] [2021-06-05 21:09:49,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:09:49,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:09:49,585 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 115 proven. 62 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:09:49,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:09:49,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416328443] [2021-06-05 21:09:49,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416328443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:49,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926996797] [2021-06-05 21:09:49,585 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 470 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 470 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:09:49,613 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:09:49,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:09:49,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:09:49,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:09:49,700 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 117 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:09:49,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926996797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:49,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:09:49,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 12 [2021-06-05 21:09:49,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314994717] [2021-06-05 21:09:49,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:09:49,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:09:49,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:09:49,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:09:49,701 INFO L87 Difference]: Start difference. First operand 14558 states and 36978 transitions. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:49,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:09:49,904 INFO L93 Difference]: Finished difference Result 17769 states and 43570 transitions. [2021-06-05 21:09:49,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:09:49,904 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:09:49,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:09:49,924 INFO L225 Difference]: With dead ends: 17769 [2021-06-05 21:09:49,924 INFO L226 Difference]: Without dead ends: 17739 [2021-06-05 21:09:49,924 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 81.5ms TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:09:49,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17739 states. [2021-06-05 21:09:50,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17739 to 15059. [2021-06-05 21:09:50,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15059 states, 15058 states have (on average 2.5455571789082216) internal successors, (38331), 15058 states have internal predecessors, (38331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:50,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15059 states to 15059 states and 38331 transitions. [2021-06-05 21:09:50,136 INFO L78 Accepts]: Start accepts. Automaton has 15059 states and 38331 transitions. Word has length 59 [2021-06-05 21:09:50,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:09:50,136 INFO L482 AbstractCegarLoop]: Abstraction has 15059 states and 38331 transitions. [2021-06-05 21:09:50,136 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:50,136 INFO L276 IsEmpty]: Start isEmpty. Operand 15059 states and 38331 transitions. [2021-06-05 21:09:50,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:09:50,146 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:09:50,146 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:09:50,347 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 470 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable972 [2021-06-05 21:09:50,347 INFO L430 AbstractCegarLoop]: === Iteration 479 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:09:50,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:09:50,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1260121175, now seen corresponding path program 284 times [2021-06-05 21:09:50,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:09:50,347 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938354109] [2021-06-05 21:09:50,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:09:50,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:09:50,441 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:09:50,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:09:50,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938354109] [2021-06-05 21:09:50,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938354109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:50,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446864461] [2021-06-05 21:09:50,441 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 471 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 471 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:09:50,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:09:50,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:09:50,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 21:09:50,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:09:50,562 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:09:50,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446864461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:50,563 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:09:50,563 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:09:50,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986394813] [2021-06-05 21:09:50,563 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:09:50,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:09:50,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:09:50,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:09:50,563 INFO L87 Difference]: Start difference. First operand 15059 states and 38331 transitions. Second operand has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:51,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:09:51,375 INFO L93 Difference]: Finished difference Result 19111 states and 46968 transitions. [2021-06-05 21:09:51,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 21:09:51,376 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:09:51,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:09:51,393 INFO L225 Difference]: With dead ends: 19111 [2021-06-05 21:09:51,393 INFO L226 Difference]: Without dead ends: 19057 [2021-06-05 21:09:51,393 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 249.5ms TimeCoverageRelationStatistics Valid=117, Invalid=813, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:09:51,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19057 states. [2021-06-05 21:09:51,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19057 to 15532. [2021-06-05 21:09:51,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15532 states, 15531 states have (on average 2.551155753010109) internal successors, (39622), 15531 states have internal predecessors, (39622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:51,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15532 states to 15532 states and 39622 transitions. [2021-06-05 21:09:51,595 INFO L78 Accepts]: Start accepts. Automaton has 15532 states and 39622 transitions. Word has length 59 [2021-06-05 21:09:51,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:09:51,595 INFO L482 AbstractCegarLoop]: Abstraction has 15532 states and 39622 transitions. [2021-06-05 21:09:51,595 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:51,595 INFO L276 IsEmpty]: Start isEmpty. Operand 15532 states and 39622 transitions. [2021-06-05 21:09:51,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:09:51,605 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:09:51,605 INFO L554 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:09:51,805 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 471 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable975 [2021-06-05 21:09:51,805 INFO L430 AbstractCegarLoop]: === Iteration 480 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:09:51,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:09:51,805 INFO L82 PathProgramCache]: Analyzing trace with hash -1502287012, now seen corresponding path program 285 times [2021-06-05 21:09:51,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:09:51,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37621304] [2021-06-05 21:09:51,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:09:51,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:09:51,880 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 48 proven. 129 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:09:51,880 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:09:51,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37621304] [2021-06-05 21:09:51,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37621304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:51,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209318768] [2021-06-05 21:09:51,881 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 472 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 472 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:09:51,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-06-05 21:09:51,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:09:51,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:09:51,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:09:51,997 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 48 proven. 129 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:09:51,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209318768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:51,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:09:51,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-05 21:09:51,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501642303] [2021-06-05 21:09:51,998 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:09:51,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:09:51,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:09:51,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:09:51,998 INFO L87 Difference]: Start difference. First operand 15532 states and 39622 transitions. Second operand has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:52,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:09:52,209 INFO L93 Difference]: Finished difference Result 18411 states and 44785 transitions. [2021-06-05 21:09:52,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:09:52,209 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:09:52,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:09:52,228 INFO L225 Difference]: With dead ends: 18411 [2021-06-05 21:09:52,228 INFO L226 Difference]: Without dead ends: 18387 [2021-06-05 21:09:52,229 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 85.2ms TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:09:52,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18387 states. [2021-06-05 21:09:52,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18387 to 15532. [2021-06-05 21:09:52,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15532 states, 15531 states have (on average 2.54993239327796) internal successors, (39603), 15531 states have internal predecessors, (39603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:52,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15532 states to 15532 states and 39603 transitions. [2021-06-05 21:09:52,446 INFO L78 Accepts]: Start accepts. Automaton has 15532 states and 39603 transitions. Word has length 59 [2021-06-05 21:09:52,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:09:52,446 INFO L482 AbstractCegarLoop]: Abstraction has 15532 states and 39603 transitions. [2021-06-05 21:09:52,446 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:52,446 INFO L276 IsEmpty]: Start isEmpty. Operand 15532 states and 39603 transitions. [2021-06-05 21:09:52,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:09:52,456 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:09:52,456 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:09:52,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 472 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable976 [2021-06-05 21:09:52,657 INFO L430 AbstractCegarLoop]: === Iteration 481 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:09:52,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:09:52,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1414957709, now seen corresponding path program 286 times [2021-06-05 21:09:52,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:09:52,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437314196] [2021-06-05 21:09:52,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:09:52,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:09:52,756 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:09:52,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:09:52,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437314196] [2021-06-05 21:09:52,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437314196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:52,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77963751] [2021-06-05 21:09:52,757 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 473 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 473 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:09:52,786 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:09:52,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:09:52,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 21:09:52,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:09:52,869 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:09:52,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77963751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:52,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:09:52,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 21:09:52,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436098850] [2021-06-05 21:09:52,870 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:09:52,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:09:52,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:09:52,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:09:52,870 INFO L87 Difference]: Start difference. First operand 15532 states and 39603 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:53,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:09:53,964 INFO L93 Difference]: Finished difference Result 24361 states and 58995 transitions. [2021-06-05 21:09:53,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 21:09:53,964 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:09:53,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:09:53,992 INFO L225 Difference]: With dead ends: 24361 [2021-06-05 21:09:53,992 INFO L226 Difference]: Without dead ends: 24193 [2021-06-05 21:09:53,992 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 467.1ms TimeCoverageRelationStatistics Valid=279, Invalid=2271, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 21:09:54,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24193 states. [2021-06-05 21:09:54,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24193 to 16448. [2021-06-05 21:09:54,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16448 states, 16447 states have (on average 2.5559676536754425) internal successors, (42038), 16447 states have internal predecessors, (42038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:54,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16448 states to 16448 states and 42038 transitions. [2021-06-05 21:09:54,268 INFO L78 Accepts]: Start accepts. Automaton has 16448 states and 42038 transitions. Word has length 59 [2021-06-05 21:09:54,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:09:54,268 INFO L482 AbstractCegarLoop]: Abstraction has 16448 states and 42038 transitions. [2021-06-05 21:09:54,268 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:54,268 INFO L276 IsEmpty]: Start isEmpty. Operand 16448 states and 42038 transitions. [2021-06-05 21:09:54,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:09:54,278 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:09:54,278 INFO L554 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:09:54,478 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable980,473 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:09:54,478 INFO L430 AbstractCegarLoop]: === Iteration 482 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:09:54,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:09:54,479 INFO L82 PathProgramCache]: Analyzing trace with hash 1801560386, now seen corresponding path program 287 times [2021-06-05 21:09:54,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:09:54,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107455085] [2021-06-05 21:09:54,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:09:54,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:09:54,562 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 43 proven. 134 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:09:54,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:09:54,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107455085] [2021-06-05 21:09:54,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107455085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:54,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988306718] [2021-06-05 21:09:54,562 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 474 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 474 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:09:54,593 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-06-05 21:09:54,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:09:54,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:09:54,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:09:54,774 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 43 proven. 134 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:09:54,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988306718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:54,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:09:54,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 16 [2021-06-05 21:09:54,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465059721] [2021-06-05 21:09:54,775 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:09:54,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:09:54,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:09:54,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:09:54,775 INFO L87 Difference]: Start difference. First operand 16448 states and 42038 transitions. Second operand has 17 states, 17 states have (on average 4.470588235294118) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:55,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:09:55,089 INFO L93 Difference]: Finished difference Result 19584 states and 47707 transitions. [2021-06-05 21:09:55,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:09:55,089 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.470588235294118) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:09:55,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:09:55,110 INFO L225 Difference]: With dead ends: 19584 [2021-06-05 21:09:55,110 INFO L226 Difference]: Without dead ends: 19551 [2021-06-05 21:09:55,110 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 125.0ms TimeCoverageRelationStatistics Valid=122, Invalid=298, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:09:55,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19551 states. [2021-06-05 21:09:55,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19551 to 16448. [2021-06-05 21:09:55,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16448 states, 16447 states have (on average 2.5550556332461847) internal successors, (42023), 16447 states have internal predecessors, (42023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:55,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16448 states to 16448 states and 42023 transitions. [2021-06-05 21:09:55,339 INFO L78 Accepts]: Start accepts. Automaton has 16448 states and 42023 transitions. Word has length 59 [2021-06-05 21:09:55,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:09:55,339 INFO L482 AbstractCegarLoop]: Abstraction has 16448 states and 42023 transitions. [2021-06-05 21:09:55,339 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.470588235294118) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:55,339 INFO L276 IsEmpty]: Start isEmpty. Operand 16448 states and 42023 transitions. [2021-06-05 21:09:55,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:09:55,350 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:09:55,350 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:09:55,550 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 474 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable981 [2021-06-05 21:09:55,550 INFO L430 AbstractCegarLoop]: === Iteration 483 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:09:55,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:09:55,550 INFO L82 PathProgramCache]: Analyzing trace with hash 1355266199, now seen corresponding path program 288 times [2021-06-05 21:09:55,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:09:55,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162079989] [2021-06-05 21:09:55,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:09:55,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:09:55,661 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:09:55,661 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:09:55,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162079989] [2021-06-05 21:09:55,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162079989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:55,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079337] [2021-06-05 21:09:55,661 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 475 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 475 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:09:55,694 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-06-05 21:09:55,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:09:55,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 21:09:55,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:09:55,778 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:09:55,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:55,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:09:55,778 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:09:55,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042265566] [2021-06-05 21:09:55,778 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:09:55,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:09:55,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:09:55,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:09:55,779 INFO L87 Difference]: Start difference. First operand 16448 states and 42023 transitions. Second operand has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:57,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:09:57,418 INFO L93 Difference]: Finished difference Result 35626 states and 84935 transitions. [2021-06-05 21:09:57,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-05 21:09:57,419 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:09:57,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:09:57,465 INFO L225 Difference]: With dead ends: 35626 [2021-06-05 21:09:57,466 INFO L226 Difference]: Without dead ends: 35104 [2021-06-05 21:09:57,466 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2343 ImplicationChecksByTransitivity, 889.9ms TimeCoverageRelationStatistics Valid=657, Invalid=6149, Unknown=0, NotChecked=0, Total=6806 [2021-06-05 21:09:57,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35104 states. [2021-06-05 21:09:57,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35104 to 17932. [2021-06-05 21:09:57,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17932 states, 17931 states have (on average 2.560760693770565) internal successors, (45917), 17931 states have internal predecessors, (45917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:57,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17932 states to 17932 states and 45917 transitions. [2021-06-05 21:09:57,842 INFO L78 Accepts]: Start accepts. Automaton has 17932 states and 45917 transitions. Word has length 59 [2021-06-05 21:09:57,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:09:57,842 INFO L482 AbstractCegarLoop]: Abstraction has 17932 states and 45917 transitions. [2021-06-05 21:09:57,842 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:57,842 INFO L276 IsEmpty]: Start isEmpty. Operand 17932 states and 45917 transitions. [2021-06-05 21:09:57,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:09:57,853 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:09:57,853 INFO L554 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:09:58,053 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable986,475 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:09:58,054 INFO L430 AbstractCegarLoop]: === Iteration 484 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:09:58,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:09:58,054 INFO L82 PathProgramCache]: Analyzing trace with hash -1046128228, now seen corresponding path program 289 times [2021-06-05 21:09:58,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:09:58,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865614877] [2021-06-05 21:09:58,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:09:58,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:09:58,149 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 44 proven. 133 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:09:58,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:09:58,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865614877] [2021-06-05 21:09:58,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865614877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:58,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562209458] [2021-06-05 21:09:58,149 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 476 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 476 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:09:58,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:09:58,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:09:58,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:09:58,342 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 44 proven. 133 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:09:58,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562209458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:58,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:09:58,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-05 21:09:58,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857576210] [2021-06-05 21:09:58,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:09:58,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:09:58,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:09:58,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:09:58,343 INFO L87 Difference]: Start difference. First operand 17932 states and 45917 transitions. Second operand has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:58,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:09:58,606 INFO L93 Difference]: Finished difference Result 21190 states and 51795 transitions. [2021-06-05 21:09:58,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:09:58,606 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:09:58,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:09:58,630 INFO L225 Difference]: With dead ends: 21190 [2021-06-05 21:09:58,630 INFO L226 Difference]: Without dead ends: 21148 [2021-06-05 21:09:58,630 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 123.3ms TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:09:58,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21148 states. [2021-06-05 21:09:58,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21148 to 17932. [2021-06-05 21:09:58,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17932 states, 17931 states have (on average 2.5599241537002957) internal successors, (45902), 17931 states have internal predecessors, (45902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:58,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17932 states to 17932 states and 45902 transitions. [2021-06-05 21:09:58,898 INFO L78 Accepts]: Start accepts. Automaton has 17932 states and 45902 transitions. Word has length 59 [2021-06-05 21:09:58,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:09:58,898 INFO L482 AbstractCegarLoop]: Abstraction has 17932 states and 45902 transitions. [2021-06-05 21:09:58,898 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:58,898 INFO L276 IsEmpty]: Start isEmpty. Operand 17932 states and 45902 transitions. [2021-06-05 21:09:58,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:09:58,909 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:09:58,909 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:09:59,109 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 476 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable987 [2021-06-05 21:09:59,110 INFO L430 AbstractCegarLoop]: === Iteration 485 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:09:59,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:09:59,110 INFO L82 PathProgramCache]: Analyzing trace with hash 1201952333, now seen corresponding path program 290 times [2021-06-05 21:09:59,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:09:59,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592409770] [2021-06-05 21:09:59,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:09:59,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:09:59,232 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:09:59,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:09:59,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592409770] [2021-06-05 21:09:59,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592409770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:59,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810083375] [2021-06-05 21:09:59,232 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 477 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 477 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:09:59,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:09:59,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:09:59,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 21:09:59,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:09:59,344 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:09:59,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810083375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:59,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:09:59,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 21:09:59,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491807190] [2021-06-05 21:09:59,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:09:59,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:09:59,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:09:59,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:09:59,345 INFO L87 Difference]: Start difference. First operand 17932 states and 45902 transitions. Second operand has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:01,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:10:01,820 INFO L93 Difference]: Finished difference Result 45251 states and 107889 transitions. [2021-06-05 21:10:01,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2021-06-05 21:10:01,822 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:10:01,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:10:01,882 INFO L225 Difference]: With dead ends: 45251 [2021-06-05 21:10:01,882 INFO L226 Difference]: Without dead ends: 44633 [2021-06-05 21:10:01,884 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6679 ImplicationChecksByTransitivity, 1638.0ms TimeCoverageRelationStatistics Valid=1467, Invalid=15563, Unknown=0, NotChecked=0, Total=17030 [2021-06-05 21:10:01,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44633 states. [2021-06-05 21:10:02,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44633 to 19324. [2021-06-05 21:10:02,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19324 states, 19323 states have (on average 2.5631630699166794) internal successors, (49528), 19323 states have internal predecessors, (49528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:02,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19324 states to 19324 states and 49528 transitions. [2021-06-05 21:10:02,457 INFO L78 Accepts]: Start accepts. Automaton has 19324 states and 49528 transitions. Word has length 59 [2021-06-05 21:10:02,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:10:02,457 INFO L482 AbstractCegarLoop]: Abstraction has 19324 states and 49528 transitions. [2021-06-05 21:10:02,457 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:02,457 INFO L276 IsEmpty]: Start isEmpty. Operand 19324 states and 49528 transitions. [2021-06-05 21:10:02,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:10:02,469 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:10:02,469 INFO L554 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:10:02,669 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 477 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable993 [2021-06-05 21:10:02,670 INFO L430 AbstractCegarLoop]: === Iteration 486 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:10:02,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:10:02,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1951369986, now seen corresponding path program 291 times [2021-06-05 21:10:02,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:10:02,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825214812] [2021-06-05 21:10:02,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:10:02,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:10:02,789 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 51 proven. 126 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:10:02,789 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:10:02,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825214812] [2021-06-05 21:10:02,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825214812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:02,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936736511] [2021-06-05 21:10:02,789 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 478 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 478 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:10:02,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 21:10:02,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:10:02,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:10:02,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:10:02,923 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 51 proven. 126 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:10:02,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936736511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:02,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:10:02,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-06-05 21:10:02,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612288039] [2021-06-05 21:10:02,924 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:10:02,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:10:02,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:10:02,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:10:02,924 INFO L87 Difference]: Start difference. First operand 19324 states and 49528 transitions. Second operand has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:03,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:10:03,222 INFO L93 Difference]: Finished difference Result 22688 states and 55618 transitions. [2021-06-05 21:10:03,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:10:03,222 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:10:03,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:10:03,250 INFO L225 Difference]: With dead ends: 22688 [2021-06-05 21:10:03,250 INFO L226 Difference]: Without dead ends: 22637 [2021-06-05 21:10:03,250 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 160.7ms TimeCoverageRelationStatistics Valid=146, Invalid=316, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:10:03,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22637 states. [2021-06-05 21:10:03,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22637 to 18993. [2021-06-05 21:10:03,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18993 states, 18992 states have (on average 2.5599726200505475) internal successors, (48619), 18992 states have internal predecessors, (48619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:03,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18993 states to 18993 states and 48619 transitions. [2021-06-05 21:10:03,551 INFO L78 Accepts]: Start accepts. Automaton has 18993 states and 48619 transitions. Word has length 59 [2021-06-05 21:10:03,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:10:03,551 INFO L482 AbstractCegarLoop]: Abstraction has 18993 states and 48619 transitions. [2021-06-05 21:10:03,551 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:03,551 INFO L276 IsEmpty]: Start isEmpty. Operand 18993 states and 48619 transitions. [2021-06-05 21:10:03,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:10:03,562 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:10:03,562 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:10:03,763 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 478 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable994 [2021-06-05 21:10:03,763 INFO L430 AbstractCegarLoop]: === Iteration 487 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:10:03,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:10:03,763 INFO L82 PathProgramCache]: Analyzing trace with hash -621194025, now seen corresponding path program 292 times [2021-06-05 21:10:03,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:10:03,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18397599] [2021-06-05 21:10:03,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:10:03,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:10:03,933 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:10:03,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:10:03,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18397599] [2021-06-05 21:10:03,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18397599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:03,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412583578] [2021-06-05 21:10:03,933 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 479 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 479 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:10:03,968 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:10:03,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:10:03,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 21:10:03,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:10:04,050 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:10:04,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412583578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:04,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:10:04,050 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-06-05 21:10:04,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074076064] [2021-06-05 21:10:04,050 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:10:04,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:10:04,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:10:04,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:10:04,051 INFO L87 Difference]: Start difference. First operand 18993 states and 48619 transitions. Second operand has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 16 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:04,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:10:04,952 INFO L93 Difference]: Finished difference Result 27005 states and 64480 transitions. [2021-06-05 21:10:04,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:10:04,952 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 16 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:10:04,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:10:04,988 INFO L225 Difference]: With dead ends: 27005 [2021-06-05 21:10:04,988 INFO L226 Difference]: Without dead ends: 26165 [2021-06-05 21:10:04,988 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 390.6ms TimeCoverageRelationStatistics Valid=181, Invalid=1009, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 21:10:05,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26165 states. [2021-06-05 21:10:05,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26165 to 14615. [2021-06-05 21:10:05,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14615 states, 14614 states have (on average 2.5288764198713563) internal successors, (36957), 14614 states have internal predecessors, (36957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:05,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14615 states to 14615 states and 36957 transitions. [2021-06-05 21:10:05,251 INFO L78 Accepts]: Start accepts. Automaton has 14615 states and 36957 transitions. Word has length 59 [2021-06-05 21:10:05,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:10:05,251 INFO L482 AbstractCegarLoop]: Abstraction has 14615 states and 36957 transitions. [2021-06-05 21:10:05,252 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 16 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:05,252 INFO L276 IsEmpty]: Start isEmpty. Operand 14615 states and 36957 transitions. [2021-06-05 21:10:05,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:10:05,263 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:10:05,263 INFO L554 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:10:05,463 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 479 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1001 [2021-06-05 21:10:05,463 INFO L430 AbstractCegarLoop]: === Iteration 488 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:10:05,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:10:05,463 INFO L82 PathProgramCache]: Analyzing trace with hash -1481135952, now seen corresponding path program 137 times [2021-06-05 21:10:05,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:10:05,463 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782911656] [2021-06-05 21:10:05,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:10:05,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:10:05,532 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 136 proven. 41 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:10:05,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:10:05,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782911656] [2021-06-05 21:10:05,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782911656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:05,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283652672] [2021-06-05 21:10:05,533 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 480 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 480 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:10:05,569 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-06-05 21:10:05,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:10:05,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:10:05,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:10:05,672 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 137 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:10:05,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283652672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:05,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:10:05,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 14 [2021-06-05 21:10:05,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716196996] [2021-06-05 21:10:05,672 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:10:05,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:10:05,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:10:05,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:10:05,673 INFO L87 Difference]: Start difference. First operand 14615 states and 36957 transitions. Second operand has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:05,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:10:05,971 INFO L93 Difference]: Finished difference Result 22169 states and 53449 transitions. [2021-06-05 21:10:05,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:10:05,971 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:10:05,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:10:05,997 INFO L225 Difference]: With dead ends: 22169 [2021-06-05 21:10:05,997 INFO L226 Difference]: Without dead ends: 22169 [2021-06-05 21:10:05,997 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 121.9ms TimeCoverageRelationStatistics Valid=180, Invalid=240, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:10:06,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22169 states. [2021-06-05 21:10:06,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22169 to 14758. [2021-06-05 21:10:06,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14758 states, 14757 states have (on average 2.533035169749949) internal successors, (37380), 14757 states have internal predecessors, (37380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:06,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14758 states to 14758 states and 37380 transitions. [2021-06-05 21:10:06,296 INFO L78 Accepts]: Start accepts. Automaton has 14758 states and 37380 transitions. Word has length 59 [2021-06-05 21:10:06,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:10:06,297 INFO L482 AbstractCegarLoop]: Abstraction has 14758 states and 37380 transitions. [2021-06-05 21:10:06,297 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:06,297 INFO L276 IsEmpty]: Start isEmpty. Operand 14758 states and 37380 transitions. [2021-06-05 21:10:06,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:10:06,306 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:10:06,306 INFO L554 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:10:06,507 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 480 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1002 [2021-06-05 21:10:06,507 INFO L430 AbstractCegarLoop]: === Iteration 489 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:10:06,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:10:06,507 INFO L82 PathProgramCache]: Analyzing trace with hash 1176258888, now seen corresponding path program 138 times [2021-06-05 21:10:06,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:10:06,507 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649650059] [2021-06-05 21:10:06,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:10:06,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:10:06,586 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 135 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:10:06,586 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:10:06,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649650059] [2021-06-05 21:10:06,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649650059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:06,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118920893] [2021-06-05 21:10:06,587 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 481 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 481 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:10:06,621 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-06-05 21:10:06,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:10:06,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:10:06,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:10:06,712 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 136 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:10:06,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118920893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:06,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:10:06,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-06-05 21:10:06,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705533798] [2021-06-05 21:10:06,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:10:06,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:10:06,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:10:06,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:10:06,713 INFO L87 Difference]: Start difference. First operand 14758 states and 37380 transitions. Second operand has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:07,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:10:07,102 INFO L93 Difference]: Finished difference Result 24727 states and 59450 transitions. [2021-06-05 21:10:07,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:10:07,103 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:10:07,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:10:07,131 INFO L225 Difference]: With dead ends: 24727 [2021-06-05 21:10:07,131 INFO L226 Difference]: Without dead ends: 24727 [2021-06-05 21:10:07,131 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 163.7ms TimeCoverageRelationStatistics Valid=237, Invalid=363, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:10:07,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24727 states. [2021-06-05 21:10:07,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24727 to 14806. [2021-06-05 21:10:07,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14806 states, 14805 states have (on average 2.534481594056062) internal successors, (37523), 14805 states have internal predecessors, (37523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:07,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14806 states to 14806 states and 37523 transitions. [2021-06-05 21:10:07,384 INFO L78 Accepts]: Start accepts. Automaton has 14806 states and 37523 transitions. Word has length 59 [2021-06-05 21:10:07,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:10:07,384 INFO L482 AbstractCegarLoop]: Abstraction has 14806 states and 37523 transitions. [2021-06-05 21:10:07,384 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:07,384 INFO L276 IsEmpty]: Start isEmpty. Operand 14806 states and 37523 transitions. [2021-06-05 21:10:07,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:10:07,394 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:10:07,394 INFO L554 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:10:07,594 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1003,481 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:10:07,594 INFO L430 AbstractCegarLoop]: === Iteration 490 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:10:07,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:10:07,595 INFO L82 PathProgramCache]: Analyzing trace with hash -513736276, now seen corresponding path program 139 times [2021-06-05 21:10:07,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:10:07,595 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836547554] [2021-06-05 21:10:07,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:10:07,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:10:07,683 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 128 proven. 49 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:10:07,683 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:10:07,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836547554] [2021-06-05 21:10:07,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836547554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:07,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356234232] [2021-06-05 21:10:07,683 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 482 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 482 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:10:07,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:10:07,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:10:07,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:10:07,805 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 129 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:10:07,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356234232] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:07,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:10:07,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 14 [2021-06-05 21:10:07,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307566837] [2021-06-05 21:10:07,805 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:10:07,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:10:07,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:10:07,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:10:07,806 INFO L87 Difference]: Start difference. First operand 14806 states and 37523 transitions. Second operand has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:08,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:10:08,243 INFO L93 Difference]: Finished difference Result 25465 states and 61218 transitions. [2021-06-05 21:10:08,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:10:08,244 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:10:08,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:10:08,276 INFO L225 Difference]: With dead ends: 25465 [2021-06-05 21:10:08,276 INFO L226 Difference]: Without dead ends: 25465 [2021-06-05 21:10:08,276 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 205.9ms TimeCoverageRelationStatistics Valid=313, Invalid=499, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:10:08,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25465 states. [2021-06-05 21:10:08,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25465 to 14863. [2021-06-05 21:10:08,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14863 states, 14862 states have (on average 2.5361997039429416) internal successors, (37693), 14862 states have internal predecessors, (37693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:08,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14863 states to 14863 states and 37693 transitions. [2021-06-05 21:10:08,537 INFO L78 Accepts]: Start accepts. Automaton has 14863 states and 37693 transitions. Word has length 59 [2021-06-05 21:10:08,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:10:08,537 INFO L482 AbstractCegarLoop]: Abstraction has 14863 states and 37693 transitions. [2021-06-05 21:10:08,537 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:08,537 INFO L276 IsEmpty]: Start isEmpty. Operand 14863 states and 37693 transitions. [2021-06-05 21:10:08,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:10:08,547 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:10:08,547 INFO L554 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:10:08,747 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 482 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1004 [2021-06-05 21:10:08,747 INFO L430 AbstractCegarLoop]: === Iteration 491 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:10:08,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:10:08,747 INFO L82 PathProgramCache]: Analyzing trace with hash -1553023288, now seen corresponding path program 140 times [2021-06-05 21:10:08,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:10:08,748 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756114909] [2021-06-05 21:10:08,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:10:08,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:10:08,847 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 121 proven. 56 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:10:08,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:10:08,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756114909] [2021-06-05 21:10:08,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756114909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:08,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324638459] [2021-06-05 21:10:08,847 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 483 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 483 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:10:08,875 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:10:08,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:10:08,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:10:08,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:10:08,967 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 122 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:10:08,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324638459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:08,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:10:08,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 15 [2021-06-05 21:10:08,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91279199] [2021-06-05 21:10:08,968 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:10:08,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:10:08,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:10:08,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:10:08,968 INFO L87 Difference]: Start difference. First operand 14863 states and 37693 transitions. Second operand has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:09,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:10:09,470 INFO L93 Difference]: Finished difference Result 24352 states and 58685 transitions. [2021-06-05 21:10:09,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:10:09,470 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:10:09,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:10:09,500 INFO L225 Difference]: With dead ends: 24352 [2021-06-05 21:10:09,501 INFO L226 Difference]: Without dead ends: 24352 [2021-06-05 21:10:09,501 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 233.9ms TimeCoverageRelationStatistics Valid=355, Invalid=575, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:10:09,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24352 states. [2021-06-05 21:10:09,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24352 to 14909. [2021-06-05 21:10:09,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14909 states, 14908 states have (on average 2.5376978803327073) internal successors, (37832), 14908 states have internal predecessors, (37832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:09,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14909 states to 14909 states and 37832 transitions. [2021-06-05 21:10:09,769 INFO L78 Accepts]: Start accepts. Automaton has 14909 states and 37832 transitions. Word has length 59 [2021-06-05 21:10:09,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:10:09,770 INFO L482 AbstractCegarLoop]: Abstraction has 14909 states and 37832 transitions. [2021-06-05 21:10:09,770 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:09,770 INFO L276 IsEmpty]: Start isEmpty. Operand 14909 states and 37832 transitions. [2021-06-05 21:10:09,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:10:09,779 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:10:09,779 INFO L554 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:10:09,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1005,483 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:10:09,980 INFO L430 AbstractCegarLoop]: === Iteration 492 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:10:09,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:10:09,980 INFO L82 PathProgramCache]: Analyzing trace with hash -533160916, now seen corresponding path program 141 times [2021-06-05 21:10:09,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:10:09,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489551957] [2021-06-05 21:10:09,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:10:09,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:10:10,093 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 114 proven. 63 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:10:10,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:10:10,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489551957] [2021-06-05 21:10:10,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489551957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:10,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441573739] [2021-06-05 21:10:10,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 484 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 484 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:10:10,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-06-05 21:10:10,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:10:10,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:10:10,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:10:10,357 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 144 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:10:10,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441573739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:10,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:10:10,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 21 [2021-06-05 21:10:10,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348639826] [2021-06-05 21:10:10,358 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:10:10,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:10:10,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:10:10,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=308, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:10:10,358 INFO L87 Difference]: Start difference. First operand 14909 states and 37832 transitions. Second operand has 22 states, 22 states have (on average 3.409090909090909) internal successors, (75), 21 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:10,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:10:10,802 INFO L93 Difference]: Finished difference Result 17503 states and 42817 transitions. [2021-06-05 21:10:10,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:10:10,803 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.409090909090909) internal successors, (75), 21 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:10:10,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:10:10,823 INFO L225 Difference]: With dead ends: 17503 [2021-06-05 21:10:10,823 INFO L226 Difference]: Without dead ends: 17503 [2021-06-05 21:10:10,823 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 307.9ms TimeCoverageRelationStatistics Valid=266, Invalid=490, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:10:10,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17503 states. [2021-06-05 21:10:10,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17503 to 14273. [2021-06-05 21:10:11,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14273 states, 14272 states have (on average 2.5301289237668163) internal successors, (36110), 14272 states have internal predecessors, (36110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:11,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14273 states to 14273 states and 36110 transitions. [2021-06-05 21:10:11,033 INFO L78 Accepts]: Start accepts. Automaton has 14273 states and 36110 transitions. Word has length 59 [2021-06-05 21:10:11,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:10:11,033 INFO L482 AbstractCegarLoop]: Abstraction has 14273 states and 36110 transitions. [2021-06-05 21:10:11,033 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.409090909090909) internal successors, (75), 21 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:11,033 INFO L276 IsEmpty]: Start isEmpty. Operand 14273 states and 36110 transitions. [2021-06-05 21:10:11,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:10:11,043 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:10:11,043 INFO L554 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:10:11,243 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 484 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1006 [2021-06-05 21:10:11,243 INFO L430 AbstractCegarLoop]: === Iteration 493 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:10:11,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:10:11,243 INFO L82 PathProgramCache]: Analyzing trace with hash -539355172, now seen corresponding path program 293 times [2021-06-05 21:10:11,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:10:11,244 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830898588] [2021-06-05 21:10:11,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:10:11,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:10:11,361 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 65 proven. 113 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:10:11,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:10:11,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830898588] [2021-06-05 21:10:11,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830898588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:11,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951263242] [2021-06-05 21:10:11,361 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 485 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 485 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:10:11,391 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 21:10:11,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:10:11,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:10:11,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:10:11,501 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 65 proven. 113 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:10:11,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951263242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:11,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:10:11,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 19 [2021-06-05 21:10:11,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530466584] [2021-06-05 21:10:11,501 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 21:10:11,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:10:11,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 21:10:11,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:10:11,502 INFO L87 Difference]: Start difference. First operand 14273 states and 36110 transitions. Second operand has 20 states, 20 states have (on average 3.8) internal successors, (76), 19 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:11,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:10:11,866 INFO L93 Difference]: Finished difference Result 16871 states and 40798 transitions. [2021-06-05 21:10:11,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:10:11,867 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.8) internal successors, (76), 19 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:10:11,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:10:11,884 INFO L225 Difference]: With dead ends: 16871 [2021-06-05 21:10:11,884 INFO L226 Difference]: Without dead ends: 16817 [2021-06-05 21:10:11,885 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 197.1ms TimeCoverageRelationStatistics Valid=188, Invalid=514, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:10:11,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16817 states. [2021-06-05 21:10:12,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16817 to 14273. [2021-06-05 21:10:12,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14273 states, 14272 states have (on average 2.529077914798206) internal successors, (36095), 14272 states have internal predecessors, (36095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:12,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14273 states to 14273 states and 36095 transitions. [2021-06-05 21:10:12,086 INFO L78 Accepts]: Start accepts. Automaton has 14273 states and 36095 transitions. Word has length 59 [2021-06-05 21:10:12,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:10:12,086 INFO L482 AbstractCegarLoop]: Abstraction has 14273 states and 36095 transitions. [2021-06-05 21:10:12,086 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.8) internal successors, (76), 19 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:12,086 INFO L276 IsEmpty]: Start isEmpty. Operand 14273 states and 36095 transitions. [2021-06-05 21:10:12,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:10:12,096 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:10:12,096 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:10:12,297 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1009,485 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:10:12,297 INFO L430 AbstractCegarLoop]: === Iteration 494 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:10:12,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:10:12,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1196579045, now seen corresponding path program 142 times [2021-06-05 21:10:12,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:10:12,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499213054] [2021-06-05 21:10:12,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:10:12,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:10:12,406 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 9 proven. 165 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:10:12,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:10:12,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499213054] [2021-06-05 21:10:12,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499213054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:12,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156336683] [2021-06-05 21:10:12,406 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 486 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 486 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:10:12,436 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:10:12,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:10:12,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 21:10:12,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:10:12,521 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 166 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:10:12,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156336683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:12,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:10:12,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 21:10:12,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125700549] [2021-06-05 21:10:12,522 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:10:12,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:10:12,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:10:12,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:10:12,522 INFO L87 Difference]: Start difference. First operand 14273 states and 36095 transitions. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:13,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:10:13,059 INFO L93 Difference]: Finished difference Result 15978 states and 39441 transitions. [2021-06-05 21:10:13,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:10:13,059 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:10:13,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:10:13,077 INFO L225 Difference]: With dead ends: 15978 [2021-06-05 21:10:13,077 INFO L226 Difference]: Without dead ends: 15963 [2021-06-05 21:10:13,077 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 158.6ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:10:13,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15963 states. [2021-06-05 21:10:13,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15963 to 14540. [2021-06-05 21:10:13,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14540 states, 14539 states have (on average 2.5258958662906665) internal successors, (36724), 14539 states have internal predecessors, (36724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:13,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14540 states to 14540 states and 36724 transitions. [2021-06-05 21:10:13,282 INFO L78 Accepts]: Start accepts. Automaton has 14540 states and 36724 transitions. Word has length 59 [2021-06-05 21:10:13,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:10:13,282 INFO L482 AbstractCegarLoop]: Abstraction has 14540 states and 36724 transitions. [2021-06-05 21:10:13,282 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:13,282 INFO L276 IsEmpty]: Start isEmpty. Operand 14540 states and 36724 transitions. [2021-06-05 21:10:13,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:10:13,292 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:10:13,292 INFO L554 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:10:13,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 486 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1017 [2021-06-05 21:10:13,492 INFO L430 AbstractCegarLoop]: === Iteration 495 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:10:13,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:10:13,492 INFO L82 PathProgramCache]: Analyzing trace with hash 1751753960, now seen corresponding path program 294 times [2021-06-05 21:10:13,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:10:13,492 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314798016] [2021-06-05 21:10:13,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:10:13,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:10:13,563 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 69 proven. 105 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:10:13,563 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:10:13,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314798016] [2021-06-05 21:10:13,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314798016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:13,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547603129] [2021-06-05 21:10:13,563 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 487 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 487 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:10:13,595 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-06-05 21:10:13,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:10:13,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:10:13,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:10:13,679 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 69 proven. 105 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:10:13,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547603129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:13,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:10:13,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 21:10:13,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213231362] [2021-06-05 21:10:13,680 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:10:13,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:10:13,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:10:13,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:10:13,680 INFO L87 Difference]: Start difference. First operand 14540 states and 36724 transitions. Second operand has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:13,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:10:13,876 INFO L93 Difference]: Finished difference Result 17442 states and 41946 transitions. [2021-06-05 21:10:13,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:10:13,876 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:10:13,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:10:13,897 INFO L225 Difference]: With dead ends: 17442 [2021-06-05 21:10:13,897 INFO L226 Difference]: Without dead ends: 17424 [2021-06-05 21:10:13,897 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 79.8ms TimeCoverageRelationStatistics Valid=86, Invalid=124, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:10:13,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17424 states. [2021-06-05 21:10:14,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17424 to 14540. [2021-06-05 21:10:14,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14540 states, 14539 states have (on average 2.5246578169062524) internal successors, (36706), 14539 states have internal predecessors, (36706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:14,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14540 states to 14540 states and 36706 transitions. [2021-06-05 21:10:14,108 INFO L78 Accepts]: Start accepts. Automaton has 14540 states and 36706 transitions. Word has length 59 [2021-06-05 21:10:14,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:10:14,108 INFO L482 AbstractCegarLoop]: Abstraction has 14540 states and 36706 transitions. [2021-06-05 21:10:14,108 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) [2021-06-05 21:10:14,108 INFO L276 IsEmpty]: Start isEmpty. Operand 14540 states and 36706 transitions. [2021-06-05 21:10:14,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:10:14,118 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:10:14,118 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:10:14,318 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1018,487 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:10:14,319 INFO L430 AbstractCegarLoop]: === Iteration 496 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:10:14,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:10:14,319 INFO L82 PathProgramCache]: Analyzing trace with hash 303753947, now seen corresponding path program 295 times [2021-06-05 21:10:14,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:10:14,319 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203764841] [2021-06-05 21:10:14,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:10:14,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:10:14,404 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 20 proven. 154 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:10:14,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:10:14,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203764841] [2021-06-05 21:10:14,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203764841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:14,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563560316] [2021-06-05 21:10:14,405 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 488 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 488 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:10:14,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:10:14,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 21:10:14,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:10:14,603 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 159 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:10:14,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563560316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:14,603 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:10:14,603 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 21:10:14,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021832928] [2021-06-05 21:10:14,603 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:10:14,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:10:14,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:10:14,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:10:14,604 INFO L87 Difference]: Start difference. First operand 14540 states and 36706 transitions. Second operand has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:15,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:10:15,364 INFO L93 Difference]: Finished difference Result 15609 states and 38572 transitions. [2021-06-05 21:10:15,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:10:15,364 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:10:15,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:10:15,383 INFO L225 Difference]: With dead ends: 15609 [2021-06-05 21:10:15,383 INFO L226 Difference]: Without dead ends: 15481 [2021-06-05 21:10:15,383 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 146.4ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:10:15,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15481 states. [2021-06-05 21:10:15,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15481 to 14586. [2021-06-05 21:10:15,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14586 states, 14585 states have (on average 2.5154610901611245) internal successors, (36688), 14585 states have internal predecessors, (36688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:15,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14586 states to 14586 states and 36688 transitions. [2021-06-05 21:10:15,577 INFO L78 Accepts]: Start accepts. Automaton has 14586 states and 36688 transitions. Word has length 59 [2021-06-05 21:10:15,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:10:15,577 INFO L482 AbstractCegarLoop]: Abstraction has 14586 states and 36688 transitions. [2021-06-05 21:10:15,577 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:15,577 INFO L276 IsEmpty]: Start isEmpty. Operand 14586 states and 36688 transitions. [2021-06-05 21:10:15,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:10:15,587 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:10:15,587 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:10:15,787 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1021,488 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:10:15,787 INFO L430 AbstractCegarLoop]: === Iteration 497 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:10:15,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:10:15,788 INFO L82 PathProgramCache]: Analyzing trace with hash -309782233, now seen corresponding path program 296 times [2021-06-05 21:10:15,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:10:15,788 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503713512] [2021-06-05 21:10:15,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:10:15,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:10:15,880 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 155 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:10:15,880 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:10:15,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503713512] [2021-06-05 21:10:15,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503713512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:15,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863367752] [2021-06-05 21:10:15,880 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 489 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 489 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:10:15,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:10:15,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:10:15,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 21:10:15,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:10:15,994 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 156 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:10:15,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863367752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:15,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:10:15,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 21:10:15,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115616425] [2021-06-05 21:10:15,995 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:10:15,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:10:15,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:10:15,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:10:15,995 INFO L87 Difference]: Start difference. First operand 14586 states and 36688 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:16,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:10:16,547 INFO L93 Difference]: Finished difference Result 16298 states and 40065 transitions. [2021-06-05 21:10:16,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:10:16,548 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:10:16,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:10:16,566 INFO L225 Difference]: With dead ends: 16298 [2021-06-05 21:10:16,566 INFO L226 Difference]: Without dead ends: 16286 [2021-06-05 21:10:16,567 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 145.7ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:10:16,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16286 states. [2021-06-05 21:10:16,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16286 to 14730. [2021-06-05 21:10:16,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14730 states, 14729 states have (on average 2.5157172924163214) internal successors, (37054), 14729 states have internal predecessors, (37054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:16,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14730 states to 14730 states and 37054 transitions. [2021-06-05 21:10:16,768 INFO L78 Accepts]: Start accepts. Automaton has 14730 states and 37054 transitions. Word has length 59 [2021-06-05 21:10:16,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:10:16,768 INFO L482 AbstractCegarLoop]: Abstraction has 14730 states and 37054 transitions. [2021-06-05 21:10:16,768 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:16,768 INFO L276 IsEmpty]: Start isEmpty. Operand 14730 states and 37054 transitions. [2021-06-05 21:10:16,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:10:16,778 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:10:16,778 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:10:16,978 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 489 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1022 [2021-06-05 21:10:16,978 INFO L430 AbstractCegarLoop]: === Iteration 498 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:10:16,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:10:16,978 INFO L82 PathProgramCache]: Analyzing trace with hash 1832135101, now seen corresponding path program 297 times [2021-06-05 21:10:16,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:10:16,978 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406934344] [2021-06-05 21:10:16,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:10:16,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:10:17,071 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:10:17,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:10:17,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406934344] [2021-06-05 21:10:17,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406934344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:17,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370998759] [2021-06-05 21:10:17,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 490 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 490 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:10:17,104 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-06-05 21:10:17,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:10:17,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 21:10:17,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:10:17,189 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:10:17,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370998759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:17,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:10:17,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:10:17,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576596307] [2021-06-05 21:10:17,190 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:10:17,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:10:17,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:10:17,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:10:17,190 INFO L87 Difference]: Start difference. First operand 14730 states and 37054 transitions. Second operand has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:17,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:10:17,975 INFO L93 Difference]: Finished difference Result 18459 states and 44889 transitions. [2021-06-05 21:10:17,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 21:10:17,976 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:10:17,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:10:17,996 INFO L225 Difference]: With dead ends: 18459 [2021-06-05 21:10:17,996 INFO L226 Difference]: Without dead ends: 18405 [2021-06-05 21:10:17,996 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 268.3ms TimeCoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 21:10:18,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18405 states. [2021-06-05 21:10:18,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18405 to 15161. [2021-06-05 21:10:18,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15161 states, 15160 states have (on average 2.5215039577836413) internal successors, (38226), 15160 states have internal predecessors, (38226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:18,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15161 states to 15161 states and 38226 transitions. [2021-06-05 21:10:18,217 INFO L78 Accepts]: Start accepts. Automaton has 15161 states and 38226 transitions. Word has length 59 [2021-06-05 21:10:18,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:10:18,217 INFO L482 AbstractCegarLoop]: Abstraction has 15161 states and 38226 transitions. [2021-06-05 21:10:18,217 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:18,217 INFO L276 IsEmpty]: Start isEmpty. Operand 15161 states and 38226 transitions. [2021-06-05 21:10:18,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:10:18,227 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:10:18,227 INFO L554 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:10:18,427 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 490 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1023 [2021-06-05 21:10:18,427 INFO L430 AbstractCegarLoop]: === Iteration 499 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:10:18,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:10:18,427 INFO L82 PathProgramCache]: Analyzing trace with hash -930273086, now seen corresponding path program 298 times [2021-06-05 21:10:18,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:10:18,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944843860] [2021-06-05 21:10:18,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:10:18,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:10:18,505 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 55 proven. 122 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:10:18,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:10:18,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944843860] [2021-06-05 21:10:18,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944843860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:18,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609126712] [2021-06-05 21:10:18,506 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 491 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 491 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:10:18,534 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:10:18,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:10:18,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:10:18,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:10:18,616 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 55 proven. 122 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:10:18,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609126712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:18,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:10:18,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-05 21:10:18,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837383728] [2021-06-05 21:10:18,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:10:18,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:10:18,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:10:18,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:10:18,616 INFO L87 Difference]: Start difference. First operand 15161 states and 38226 transitions. Second operand has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:18,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:10:18,818 INFO L93 Difference]: Finished difference Result 18207 states and 43712 transitions. [2021-06-05 21:10:18,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:10:18,818 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:10:18,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:10:18,840 INFO L225 Difference]: With dead ends: 18207 [2021-06-05 21:10:18,840 INFO L226 Difference]: Without dead ends: 18183 [2021-06-05 21:10:18,841 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 87.7ms TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:10:18,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18183 states. [2021-06-05 21:10:19,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18183 to 15161. [2021-06-05 21:10:19,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15161 states, 15160 states have (on average 2.520580474934037) internal successors, (38212), 15160 states have internal predecessors, (38212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:19,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15161 states to 15161 states and 38212 transitions. [2021-06-05 21:10:19,097 INFO L78 Accepts]: Start accepts. Automaton has 15161 states and 38212 transitions. Word has length 59 [2021-06-05 21:10:19,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:10:19,097 INFO L482 AbstractCegarLoop]: Abstraction has 15161 states and 38212 transitions. [2021-06-05 21:10:19,098 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:19,098 INFO L276 IsEmpty]: Start isEmpty. Operand 15161 states and 38212 transitions. [2021-06-05 21:10:19,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:10:19,107 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:10:19,107 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:10:19,307 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1024,491 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:10:19,308 INFO L430 AbstractCegarLoop]: === Iteration 500 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:10:19,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:10:19,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1986971635, now seen corresponding path program 299 times [2021-06-05 21:10:19,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:10:19,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514681191] [2021-06-05 21:10:19,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:10:19,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:10:19,425 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:10:19,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:10:19,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514681191] [2021-06-05 21:10:19,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514681191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:19,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717712279] [2021-06-05 21:10:19,426 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 492 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 492 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:10:19,477 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-06-05 21:10:19,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:10:19,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 21:10:19,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:10:19,569 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:10:19,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717712279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:19,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:10:19,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 21:10:19,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954161668] [2021-06-05 21:10:19,569 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:10:19,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:10:19,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:10:19,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:10:19,570 INFO L87 Difference]: Start difference. First operand 15161 states and 38212 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:20,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:10:20,787 INFO L93 Difference]: Finished difference Result 23302 states and 55848 transitions. [2021-06-05 21:10:20,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 21:10:20,787 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:10:20,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:10:20,811 INFO L225 Difference]: With dead ends: 23302 [2021-06-05 21:10:20,811 INFO L226 Difference]: Without dead ends: 23134 [2021-06-05 21:10:20,811 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 550.1ms TimeCoverageRelationStatistics Valid=327, Invalid=2865, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 21:10:20,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23134 states. [2021-06-05 21:10:21,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23134 to 16060. [2021-06-05 21:10:21,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16060 states, 16059 states have (on average 2.526745127342923) internal successors, (40577), 16059 states have internal predecessors, (40577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:21,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16060 states to 16060 states and 40577 transitions. [2021-06-05 21:10:21,076 INFO L78 Accepts]: Start accepts. Automaton has 16060 states and 40577 transitions. Word has length 59 [2021-06-05 21:10:21,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:10:21,076 INFO L482 AbstractCegarLoop]: Abstraction has 16060 states and 40577 transitions. [2021-06-05 21:10:21,076 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:21,076 INFO L276 IsEmpty]: Start isEmpty. Operand 16060 states and 40577 transitions. [2021-06-05 21:10:21,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:10:21,086 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:10:21,086 INFO L554 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:10:21,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 492 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1028 [2021-06-05 21:10:21,287 INFO L430 AbstractCegarLoop]: === Iteration 501 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:10:21,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:10:21,287 INFO L82 PathProgramCache]: Analyzing trace with hash -1921392984, now seen corresponding path program 300 times [2021-06-05 21:10:21,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:10:21,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619747553] [2021-06-05 21:10:21,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:10:21,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:10:21,375 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 47 proven. 130 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:10:21,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:10:21,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619747553] [2021-06-05 21:10:21,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619747553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:21,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957617296] [2021-06-05 21:10:21,376 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 493 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 493 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:10:21,408 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-06-05 21:10:21,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:10:21,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:10:21,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:10:21,494 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 47 proven. 130 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:10:21,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957617296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:21,494 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:10:21,494 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-06-05 21:10:21,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748715472] [2021-06-05 21:10:21,494 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:10:21,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:10:21,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:10:21,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:10:21,495 INFO L87 Difference]: Start difference. First operand 16060 states and 40577 transitions. Second operand has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:21,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:10:21,745 INFO L93 Difference]: Finished difference Result 19290 states and 46411 transitions. [2021-06-05 21:10:21,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:10:21,746 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:10:21,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:10:21,767 INFO L225 Difference]: With dead ends: 19290 [2021-06-05 21:10:21,767 INFO L226 Difference]: Without dead ends: 19257 [2021-06-05 21:10:21,767 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 107.5ms TimeCoverageRelationStatistics Valid=108, Invalid=198, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:10:21,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19257 states. [2021-06-05 21:10:21,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19257 to 16060. [2021-06-05 21:10:21,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16060 states, 16059 states have (on average 2.5261846939410924) internal successors, (40568), 16059 states have internal predecessors, (40568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:22,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16060 states to 16060 states and 40568 transitions. [2021-06-05 21:10:22,008 INFO L78 Accepts]: Start accepts. Automaton has 16060 states and 40568 transitions. Word has length 59 [2021-06-05 21:10:22,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:10:22,008 INFO L482 AbstractCegarLoop]: Abstraction has 16060 states and 40568 transitions. [2021-06-05 21:10:22,008 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:22,008 INFO L276 IsEmpty]: Start isEmpty. Operand 16060 states and 40568 transitions. [2021-06-05 21:10:22,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:10:22,019 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:10:22,019 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:10:22,219 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1029,493 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:10:22,219 INFO L430 AbstractCegarLoop]: === Iteration 502 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:10:22,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:10:22,219 INFO L82 PathProgramCache]: Analyzing trace with hash 1927280125, now seen corresponding path program 301 times [2021-06-05 21:10:22,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:10:22,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710847894] [2021-06-05 21:10:22,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:10:22,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:10:22,333 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:10:22,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:10:22,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710847894] [2021-06-05 21:10:22,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710847894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:22,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772295299] [2021-06-05 21:10:22,333 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 494 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 494 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:10:22,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:10:22,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 21:10:22,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:10:22,446 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:10:22,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772295299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:22,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:10:22,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:10:22,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971513578] [2021-06-05 21:10:22,447 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:10:22,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:10:22,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:10:22,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:10:22,447 INFO L87 Difference]: Start difference. First operand 16060 states and 40568 transitions. Second operand has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:24,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:10:24,461 INFO L93 Difference]: Finished difference Result 33633 states and 79425 transitions. [2021-06-05 21:10:24,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-06-05 21:10:24,461 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:10:24,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:10:24,499 INFO L225 Difference]: With dead ends: 33633 [2021-06-05 21:10:24,500 INFO L226 Difference]: Without dead ends: 33177 [2021-06-05 21:10:24,500 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3400 ImplicationChecksByTransitivity, 1083.3ms TimeCoverageRelationStatistics Valid=813, Invalid=8499, Unknown=0, NotChecked=0, Total=9312 [2021-06-05 21:10:24,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33177 states. [2021-06-05 21:10:24,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33177 to 17660. [2021-06-05 21:10:24,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17660 states, 17659 states have (on average 2.532532986012798) internal successors, (44722), 17659 states have internal predecessors, (44722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:24,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17660 states to 17660 states and 44722 transitions. [2021-06-05 21:10:24,840 INFO L78 Accepts]: Start accepts. Automaton has 17660 states and 44722 transitions. Word has length 59 [2021-06-05 21:10:24,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:10:24,840 INFO L482 AbstractCegarLoop]: Abstraction has 17660 states and 44722 transitions. [2021-06-05 21:10:24,840 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:24,841 INFO L276 IsEmpty]: Start isEmpty. Operand 17660 states and 44722 transitions. [2021-06-05 21:10:24,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:10:24,851 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:10:24,851 INFO L554 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:10:25,051 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 494 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1034 [2021-06-05 21:10:25,051 INFO L430 AbstractCegarLoop]: === Iteration 503 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:10:25,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:10:25,052 INFO L82 PathProgramCache]: Analyzing trace with hash -474114302, now seen corresponding path program 302 times [2021-06-05 21:10:25,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:10:25,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316260608] [2021-06-05 21:10:25,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:10:25,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:10:25,150 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 45 proven. 132 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:10:25,150 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:10:25,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316260608] [2021-06-05 21:10:25,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316260608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:25,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610255941] [2021-06-05 21:10:25,150 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 495 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 495 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:10:25,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:10:25,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:10:25,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:10:25,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:10:25,262 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 45 proven. 132 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:10:25,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610255941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:25,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:10:25,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-05 21:10:25,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961124095] [2021-06-05 21:10:25,262 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:10:25,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:10:25,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:10:25,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:10:25,263 INFO L87 Difference]: Start difference. First operand 17660 states and 44722 transitions. Second operand has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:25,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:10:25,532 INFO L93 Difference]: Finished difference Result 21199 states and 51145 transitions. [2021-06-05 21:10:25,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:10:25,533 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:10:25,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:10:25,558 INFO L225 Difference]: With dead ends: 21199 [2021-06-05 21:10:25,558 INFO L226 Difference]: Without dead ends: 21157 [2021-06-05 21:10:25,558 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 126.4ms TimeCoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:10:25,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21157 states. [2021-06-05 21:10:25,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21157 to 17660. [2021-06-05 21:10:25,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17660 states, 17659 states have (on average 2.532023330879438) internal successors, (44713), 17659 states have internal predecessors, (44713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:25,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17660 states to 17660 states and 44713 transitions. [2021-06-05 21:10:25,827 INFO L78 Accepts]: Start accepts. Automaton has 17660 states and 44713 transitions. Word has length 59 [2021-06-05 21:10:25,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:10:25,827 INFO L482 AbstractCegarLoop]: Abstraction has 17660 states and 44713 transitions. [2021-06-05 21:10:25,827 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:25,827 INFO L276 IsEmpty]: Start isEmpty. Operand 17660 states and 44713 transitions. [2021-06-05 21:10:25,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:10:25,837 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:10:25,837 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:10:26,037 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 495 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1035 [2021-06-05 21:10:26,038 INFO L430 AbstractCegarLoop]: === Iteration 504 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:10:26,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:10:26,038 INFO L82 PathProgramCache]: Analyzing trace with hash 1773966259, now seen corresponding path program 303 times [2021-06-05 21:10:26,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:10:26,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235073585] [2021-06-05 21:10:26,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:10:26,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:10:26,163 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:10:26,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:10:26,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235073585] [2021-06-05 21:10:26,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235073585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:26,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010888518] [2021-06-05 21:10:26,163 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 496 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 496 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:10:26,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-06-05 21:10:26,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:10:26,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 21:10:26,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:10:26,281 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:10:26,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010888518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:26,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:10:26,281 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 21:10:26,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027779436] [2021-06-05 21:10:26,281 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:10:26,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:10:26,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:10:26,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:10:26,282 INFO L87 Difference]: Start difference. First operand 17660 states and 44713 transitions. Second operand has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:29,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:10:29,522 INFO L93 Difference]: Finished difference Result 57125 states and 132657 transitions. [2021-06-05 21:10:29,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 161 states. [2021-06-05 21:10:29,522 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:10:29,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:10:29,604 INFO L225 Difference]: With dead ends: 57125 [2021-06-05 21:10:29,605 INFO L226 Difference]: Without dead ends: 55739 [2021-06-05 21:10:29,606 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10598 ImplicationChecksByTransitivity, 2195.2ms TimeCoverageRelationStatistics Valid=1947, Invalid=23813, Unknown=0, NotChecked=0, Total=25760 [2021-06-05 21:10:29,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55739 states. [2021-06-05 21:10:30,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55739 to 20191. [2021-06-05 21:10:30,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20191 states, 20190 states have (on average 2.5379891035165922) internal successors, (51242), 20190 states have internal predecessors, (51242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:30,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20191 states to 20191 states and 51242 transitions. [2021-06-05 21:10:30,149 INFO L78 Accepts]: Start accepts. Automaton has 20191 states and 51242 transitions. Word has length 59 [2021-06-05 21:10:30,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:10:30,149 INFO L482 AbstractCegarLoop]: Abstraction has 20191 states and 51242 transitions. [2021-06-05 21:10:30,149 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:30,149 INFO L276 IsEmpty]: Start isEmpty. Operand 20191 states and 51242 transitions. [2021-06-05 21:10:30,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:10:30,160 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:10:30,160 INFO L554 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:10:30,361 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1041,496 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:10:30,361 INFO L430 AbstractCegarLoop]: === Iteration 505 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:10:30,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:10:30,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1771583384, now seen corresponding path program 304 times [2021-06-05 21:10:30,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:10:30,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213406339] [2021-06-05 21:10:30,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:10:30,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:10:30,468 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 49 proven. 128 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:10:30,468 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:10:30,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213406339] [2021-06-05 21:10:30,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213406339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:30,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102667233] [2021-06-05 21:10:30,468 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 497 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 497 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:10:30,496 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:10:30,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:10:30,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:10:30,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:10:30,590 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 49 proven. 128 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:10:30,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102667233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:30,591 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:10:30,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-06-05 21:10:30,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140046192] [2021-06-05 21:10:30,591 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:10:30,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:10:30,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:10:30,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:10:30,592 INFO L87 Difference]: Start difference. First operand 20191 states and 51242 transitions. Second operand has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:30,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:10:30,926 INFO L93 Difference]: Finished difference Result 24224 states and 58607 transitions. [2021-06-05 21:10:30,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:10:30,926 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:10:30,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:10:30,953 INFO L225 Difference]: With dead ends: 24224 [2021-06-05 21:10:30,953 INFO L226 Difference]: Without dead ends: 24173 [2021-06-05 21:10:30,953 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 146.6ms TimeCoverageRelationStatistics Valid=152, Invalid=310, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:10:30,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24173 states. [2021-06-05 21:10:31,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24173 to 20191. [2021-06-05 21:10:31,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20191 states, 20190 states have (on average 2.53754333828628) internal successors, (51233), 20190 states have internal predecessors, (51233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:31,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20191 states to 20191 states and 51233 transitions. [2021-06-05 21:10:31,269 INFO L78 Accepts]: Start accepts. Automaton has 20191 states and 51233 transitions. Word has length 59 [2021-06-05 21:10:31,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:10:31,269 INFO L482 AbstractCegarLoop]: Abstraction has 20191 states and 51233 transitions. [2021-06-05 21:10:31,269 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:31,269 INFO L276 IsEmpty]: Start isEmpty. Operand 20191 states and 51233 transitions. [2021-06-05 21:10:31,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:10:31,283 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:10:31,283 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:10:31,487 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1042,497 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:10:31,487 INFO L430 AbstractCegarLoop]: === Iteration 506 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:10:31,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:10:31,487 INFO L82 PathProgramCache]: Analyzing trace with hash -49180099, now seen corresponding path program 305 times [2021-06-05 21:10:31,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:10:31,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27998753] [2021-06-05 21:10:31,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:10:31,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:10:31,636 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:10:31,636 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:10:31,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27998753] [2021-06-05 21:10:31,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27998753] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:31,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439144281] [2021-06-05 21:10:31,636 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 498 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 498 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:10:31,670 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-06-05 21:10:31,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:10:31,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 21:10:31,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:10:31,752 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:10:31,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439144281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:31,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:10:31,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-06-05 21:10:31,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031879829] [2021-06-05 21:10:31,753 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:10:31,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:10:31,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:10:31,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:10:31,753 INFO L87 Difference]: Start difference. First operand 20191 states and 51233 transitions. Second operand has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:37,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:10:37,073 INFO L93 Difference]: Finished difference Result 72936 states and 170877 transitions. [2021-06-05 21:10:37,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 257 states. [2021-06-05 21:10:37,074 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:10:37,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:10:37,177 INFO L225 Difference]: With dead ends: 72936 [2021-06-05 21:10:37,177 INFO L226 Difference]: Without dead ends: 71616 [2021-06-05 21:10:37,182 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 255 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29073 ImplicationChecksByTransitivity, 4166.5ms TimeCoverageRelationStatistics Valid=4377, Invalid=61415, Unknown=0, NotChecked=0, Total=65792 [2021-06-05 21:10:37,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71616 states. [2021-06-05 21:10:37,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71616 to 22239. [2021-06-05 21:10:37,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22239 states, 22238 states have (on average 2.5387624786401655) internal successors, (56457), 22238 states have internal predecessors, (56457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:37,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22239 states to 22239 states and 56457 transitions. [2021-06-05 21:10:37,902 INFO L78 Accepts]: Start accepts. Automaton has 22239 states and 56457 transitions. Word has length 59 [2021-06-05 21:10:37,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:10:37,902 INFO L482 AbstractCegarLoop]: Abstraction has 22239 states and 56457 transitions. [2021-06-05 21:10:37,902 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:37,902 INFO L276 IsEmpty]: Start isEmpty. Operand 22239 states and 56457 transitions. [2021-06-05 21:10:37,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:10:37,914 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:10:37,914 INFO L554 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:10:38,115 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1049,498 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:10:38,115 INFO L430 AbstractCegarLoop]: === Iteration 507 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:10:38,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:10:38,115 INFO L82 PathProgramCache]: Analyzing trace with hash 32658754, now seen corresponding path program 306 times [2021-06-05 21:10:38,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:10:38,115 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230664319] [2021-06-05 21:10:38,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:10:38,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:10:38,260 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 59 proven. 118 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:10:38,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:10:38,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230664319] [2021-06-05 21:10:38,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230664319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:38,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53812567] [2021-06-05 21:10:38,260 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 499 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 499 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:10:38,299 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 21:10:38,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:10:38,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:10:38,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:10:38,400 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 59 proven. 118 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:10:38,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53812567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:38,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:10:38,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2021-06-05 21:10:38,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690551777] [2021-06-05 21:10:38,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:10:38,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:10:38,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:10:38,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:10:38,401 INFO L87 Difference]: Start difference. First operand 22239 states and 56457 transitions. Second operand has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:38,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:10:38,782 INFO L93 Difference]: Finished difference Result 26451 states and 64189 transitions. [2021-06-05 21:10:38,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:10:38,782 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:10:38,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:10:38,819 INFO L225 Difference]: With dead ends: 26451 [2021-06-05 21:10:38,819 INFO L226 Difference]: Without dead ends: 26391 [2021-06-05 21:10:38,819 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 198.6ms TimeCoverageRelationStatistics Valid=177, Invalid=375, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:10:38,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26391 states. [2021-06-05 21:10:39,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26391 to 21958. [2021-06-05 21:10:39,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21958 states, 21957 states have (on average 2.5370041444641798) internal successors, (55705), 21957 states have internal predecessors, (55705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:39,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21958 states to 21958 states and 55705 transitions. [2021-06-05 21:10:39,171 INFO L78 Accepts]: Start accepts. Automaton has 21958 states and 55705 transitions. Word has length 59 [2021-06-05 21:10:39,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:10:39,171 INFO L482 AbstractCegarLoop]: Abstraction has 21958 states and 55705 transitions. [2021-06-05 21:10:39,171 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:39,171 INFO L276 IsEmpty]: Start isEmpty. Operand 21958 states and 55705 transitions. [2021-06-05 21:10:39,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:10:39,183 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:10:39,183 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:10:39,383 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1050,499 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:10:39,383 INFO L430 AbstractCegarLoop]: === Iteration 508 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:10:39,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:10:39,384 INFO L82 PathProgramCache]: Analyzing trace with hash 754093939, now seen corresponding path program 307 times [2021-06-05 21:10:39,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:10:39,384 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302160183] [2021-06-05 21:10:39,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:10:39,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:10:39,532 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:10:39,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:10:39,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302160183] [2021-06-05 21:10:39,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302160183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:39,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401879335] [2021-06-05 21:10:39,533 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 500 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 500 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:10:39,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:10:39,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 21:10:39,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:10:39,644 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:10:39,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401879335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:39,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:10:39,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-06-05 21:10:39,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744764825] [2021-06-05 21:10:39,660 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:10:39,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:10:39,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:10:39,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:10:39,661 INFO L87 Difference]: Start difference. First operand 21958 states and 55705 transitions. Second operand has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:40,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:10:40,644 INFO L93 Difference]: Finished difference Result 30778 states and 73104 transitions. [2021-06-05 21:10:40,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 21:10:40,645 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:10:40,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:10:40,681 INFO L225 Difference]: With dead ends: 30778 [2021-06-05 21:10:40,682 INFO L226 Difference]: Without dead ends: 28996 [2021-06-05 21:10:40,682 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 429.0ms TimeCoverageRelationStatistics Valid=224, Invalid=1182, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 21:10:40,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28996 states. [2021-06-05 21:10:40,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28996 to 14128. [2021-06-05 21:10:40,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14128 states, 14127 states have (on average 2.5023713456501735) internal successors, (35351), 14127 states have internal predecessors, (35351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:40,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14128 states to 14128 states and 35351 transitions. [2021-06-05 21:10:40,947 INFO L78 Accepts]: Start accepts. Automaton has 14128 states and 35351 transitions. Word has length 59 [2021-06-05 21:10:40,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:10:40,948 INFO L482 AbstractCegarLoop]: Abstraction has 14128 states and 35351 transitions. [2021-06-05 21:10:40,948 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:40,948 INFO L276 IsEmpty]: Start isEmpty. Operand 14128 states and 35351 transitions. [2021-06-05 21:10:40,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:10:40,957 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:10:40,957 INFO L554 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:10:41,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 500 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1058 [2021-06-05 21:10:41,158 INFO L430 AbstractCegarLoop]: === Iteration 509 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:10:41,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:10:41,158 INFO L82 PathProgramCache]: Analyzing trace with hash 516032422, now seen corresponding path program 143 times [2021-06-05 21:10:41,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:10:41,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168004262] [2021-06-05 21:10:41,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:10:41,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:10:41,231 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 128 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:10:41,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:10:41,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168004262] [2021-06-05 21:10:41,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168004262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:41,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922590559] [2021-06-05 21:10:41,231 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 501 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 501 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:10:41,266 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-06-05 21:10:41,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:10:41,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:10:41,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:10:41,402 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 128 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:10:41,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922590559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:41,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:10:41,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 20 [2021-06-05 21:10:41,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592431905] [2021-06-05 21:10:41,402 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:10:41,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:10:41,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:10:41,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=264, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:10:41,403 INFO L87 Difference]: Start difference. First operand 14128 states and 35351 transitions. Second operand has 21 states, 21 states have (on average 4.333333333333333) internal successors, (91), 20 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:41,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:10:41,805 INFO L93 Difference]: Finished difference Result 16812 states and 41038 transitions. [2021-06-05 21:10:41,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:10:41,805 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.333333333333333) internal successors, (91), 20 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:10:41,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:10:41,822 INFO L225 Difference]: With dead ends: 16812 [2021-06-05 21:10:41,822 INFO L226 Difference]: Without dead ends: 16798 [2021-06-05 21:10:41,822 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 168.5ms TimeCoverageRelationStatistics Valid=177, Invalid=329, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:10:41,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16798 states. [2021-06-05 21:10:41,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16798 to 14566. [2021-06-05 21:10:42,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14566 states, 14565 states have (on average 2.5051150017164434) internal successors, (36487), 14565 states have internal predecessors, (36487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:42,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14566 states to 14566 states and 36487 transitions. [2021-06-05 21:10:42,025 INFO L78 Accepts]: Start accepts. Automaton has 14566 states and 36487 transitions. Word has length 59 [2021-06-05 21:10:42,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:10:42,025 INFO L482 AbstractCegarLoop]: Abstraction has 14566 states and 36487 transitions. [2021-06-05 21:10:42,025 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 4.333333333333333) internal successors, (91), 20 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:42,025 INFO L276 IsEmpty]: Start isEmpty. Operand 14566 states and 36487 transitions. [2021-06-05 21:10:42,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:10:42,033 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:10:42,034 INFO L554 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:10:42,234 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 501 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1059 [2021-06-05 21:10:42,234 INFO L430 AbstractCegarLoop]: === Iteration 510 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:10:42,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:10:42,234 INFO L82 PathProgramCache]: Analyzing trace with hash -105847988, now seen corresponding path program 144 times [2021-06-05 21:10:42,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:10:42,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308302952] [2021-06-05 21:10:42,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:10:42,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:10:42,306 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 128 proven. 49 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:10:42,306 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:10:42,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308302952] [2021-06-05 21:10:42,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308302952] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:42,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541126692] [2021-06-05 21:10:42,306 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 502 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 502 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:10:42,340 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-06-05 21:10:42,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:10:42,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:10:42,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:10:42,430 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 129 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:10:42,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541126692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:42,431 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:10:42,431 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 12 [2021-06-05 21:10:42,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307216815] [2021-06-05 21:10:42,431 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:10:42,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:10:42,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:10:42,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=89, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:10:42,431 INFO L87 Difference]: Start difference. First operand 14566 states and 36487 transitions. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:42,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:10:42,709 INFO L93 Difference]: Finished difference Result 19427 states and 46843 transitions. [2021-06-05 21:10:42,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:10:42,709 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:10:42,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:10:42,729 INFO L225 Difference]: With dead ends: 19427 [2021-06-05 21:10:42,729 INFO L226 Difference]: Without dead ends: 19427 [2021-06-05 21:10:42,729 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 120.0ms TimeCoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:10:42,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19427 states. [2021-06-05 21:10:42,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19427 to 14571. [2021-06-05 21:10:42,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14571 states, 14570 states have (on average 2.5052848318462595) internal successors, (36502), 14570 states have internal predecessors, (36502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:42,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14571 states to 14571 states and 36502 transitions. [2021-06-05 21:10:42,939 INFO L78 Accepts]: Start accepts. Automaton has 14571 states and 36502 transitions. Word has length 59 [2021-06-05 21:10:42,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:10:42,939 INFO L482 AbstractCegarLoop]: Abstraction has 14571 states and 36502 transitions. [2021-06-05 21:10:42,939 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:42,939 INFO L276 IsEmpty]: Start isEmpty. Operand 14571 states and 36502 transitions. [2021-06-05 21:10:42,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:10:42,948 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:10:42,948 INFO L554 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:10:43,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 502 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1061 [2021-06-05 21:10:43,148 INFO L430 AbstractCegarLoop]: === Iteration 511 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:10:43,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:10:43,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1743420444, now seen corresponding path program 145 times [2021-06-05 21:10:43,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:10:43,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951486196] [2021-06-05 21:10:43,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:10:43,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:10:43,231 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 128 proven. 49 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:10:43,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:10:43,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951486196] [2021-06-05 21:10:43,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951486196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:43,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984925796] [2021-06-05 21:10:43,232 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 503 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 503 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:10:43,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:10:43,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:10:43,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:10:43,351 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 129 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:10:43,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984925796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:43,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:10:43,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-06-05 21:10:43,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987654176] [2021-06-05 21:10:43,351 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:10:43,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:10:43,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:10:43,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:10:43,352 INFO L87 Difference]: Start difference. First operand 14571 states and 36502 transitions. Second operand has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:43,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:10:43,750 INFO L93 Difference]: Finished difference Result 21523 states and 51587 transitions. [2021-06-05 21:10:43,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:10:43,751 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:10:43,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:10:43,775 INFO L225 Difference]: With dead ends: 21523 [2021-06-05 21:10:43,775 INFO L226 Difference]: Without dead ends: 21523 [2021-06-05 21:10:43,775 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 186.5ms TimeCoverageRelationStatistics Valid=272, Invalid=430, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:10:43,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21523 states. [2021-06-05 21:10:43,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21523 to 14590. [2021-06-05 21:10:43,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14590 states, 14589 states have (on average 2.506134759065049) internal successors, (36562), 14589 states have internal predecessors, (36562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:44,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14590 states to 14590 states and 36562 transitions. [2021-06-05 21:10:44,018 INFO L78 Accepts]: Start accepts. Automaton has 14590 states and 36562 transitions. Word has length 59 [2021-06-05 21:10:44,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:10:44,018 INFO L482 AbstractCegarLoop]: Abstraction has 14590 states and 36562 transitions. [2021-06-05 21:10:44,019 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:44,019 INFO L276 IsEmpty]: Start isEmpty. Operand 14590 states and 36562 transitions. [2021-06-05 21:10:44,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:10:44,028 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:10:44,028 INFO L554 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:10:44,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1062,503 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:10:44,229 INFO L430 AbstractCegarLoop]: === Iteration 512 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:10:44,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:10:44,229 INFO L82 PathProgramCache]: Analyzing trace with hash 861551688, now seen corresponding path program 146 times [2021-06-05 21:10:44,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:10:44,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485542957] [2021-06-05 21:10:44,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:10:44,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:10:44,324 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 124 proven. 53 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:10:44,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:10:44,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485542957] [2021-06-05 21:10:44,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485542957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:44,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321701262] [2021-06-05 21:10:44,325 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 504 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 504 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:10:44,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:10:44,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:10:44,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:10:44,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:10:44,443 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 125 proven. 53 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:10:44,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321701262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:44,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:10:44,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 14 [2021-06-05 21:10:44,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774660298] [2021-06-05 21:10:44,443 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:10:44,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:10:44,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:10:44,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:10:44,444 INFO L87 Difference]: Start difference. First operand 14590 states and 36562 transitions. Second operand has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:44,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:10:44,980 INFO L93 Difference]: Finished difference Result 22499 states and 53828 transitions. [2021-06-05 21:10:44,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 21:10:44,980 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:10:44,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:10:45,007 INFO L225 Difference]: With dead ends: 22499 [2021-06-05 21:10:45,007 INFO L226 Difference]: Without dead ends: 22499 [2021-06-05 21:10:45,008 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 240.4ms TimeCoverageRelationStatistics Valid=375, Invalid=617, Unknown=0, NotChecked=0, Total=992 [2021-06-05 21:10:45,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22499 states. [2021-06-05 21:10:45,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22499 to 14615. [2021-06-05 21:10:45,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14615 states, 14614 states have (on average 2.507184891200219) internal successors, (36640), 14614 states have internal predecessors, (36640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:45,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14615 states to 14615 states and 36640 transitions. [2021-06-05 21:10:45,232 INFO L78 Accepts]: Start accepts. Automaton has 14615 states and 36640 transitions. Word has length 59 [2021-06-05 21:10:45,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:10:45,232 INFO L482 AbstractCegarLoop]: Abstraction has 14615 states and 36640 transitions. [2021-06-05 21:10:45,232 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:45,232 INFO L276 IsEmpty]: Start isEmpty. Operand 14615 states and 36640 transitions. [2021-06-05 21:10:45,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:10:45,241 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:10:45,241 INFO L554 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:10:45,441 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1063,504 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:10:45,442 INFO L430 AbstractCegarLoop]: === Iteration 513 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:10:45,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:10:45,442 INFO L82 PathProgramCache]: Analyzing trace with hash -177735324, now seen corresponding path program 147 times [2021-06-05 21:10:45,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:10:45,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477538432] [2021-06-05 21:10:45,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:10:45,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:10:45,547 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 120 proven. 57 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:10:45,547 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:10:45,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477538432] [2021-06-05 21:10:45,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477538432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:45,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18521652] [2021-06-05 21:10:45,547 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 505 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 505 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:10:45,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-06-05 21:10:45,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:10:45,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:10:45,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:10:45,671 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 121 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:10:45,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18521652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:45,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:10:45,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 15 [2021-06-05 21:10:45,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37798416] [2021-06-05 21:10:45,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:10:45,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:10:45,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:10:45,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:10:45,740 INFO L87 Difference]: Start difference. First operand 14615 states and 36640 transitions. Second operand has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:46,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:10:46,343 INFO L93 Difference]: Finished difference Result 22401 states and 53647 transitions. [2021-06-05 21:10:46,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 21:10:46,344 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:10:46,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:10:46,367 INFO L225 Difference]: With dead ends: 22401 [2021-06-05 21:10:46,368 INFO L226 Difference]: Without dead ends: 22401 [2021-06-05 21:10:46,368 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 281.7ms TimeCoverageRelationStatistics Valid=448, Invalid=742, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 21:10:46,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22401 states. [2021-06-05 21:10:46,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22401 to 14646. [2021-06-05 21:10:46,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14646 states, 14645 states have (on average 2.508432912256743) internal successors, (36736), 14645 states have internal predecessors, (36736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:46,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14646 states to 14646 states and 36736 transitions. [2021-06-05 21:10:46,608 INFO L78 Accepts]: Start accepts. Automaton has 14646 states and 36736 transitions. Word has length 59 [2021-06-05 21:10:46,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:10:46,608 INFO L482 AbstractCegarLoop]: Abstraction has 14646 states and 36736 transitions. [2021-06-05 21:10:46,608 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:46,608 INFO L276 IsEmpty]: Start isEmpty. Operand 14646 states and 36736 transitions. [2021-06-05 21:10:46,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:10:46,617 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:10:46,617 INFO L554 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:10:46,817 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1064,505 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:10:46,818 INFO L430 AbstractCegarLoop]: === Iteration 514 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:10:46,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:10:46,818 INFO L82 PathProgramCache]: Analyzing trace with hash 842127048, now seen corresponding path program 148 times [2021-06-05 21:10:46,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:10:46,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068953832] [2021-06-05 21:10:46,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:10:46,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:10:46,932 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 116 proven. 61 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:10:46,932 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:10:46,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068953832] [2021-06-05 21:10:46,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068953832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:46,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504667251] [2021-06-05 21:10:46,932 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 506 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 506 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:10:46,960 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:10:46,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:10:46,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:10:46,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:10:47,054 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 117 proven. 61 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:10:47,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504667251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:47,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:10:47,054 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 16 [2021-06-05 21:10:47,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259027373] [2021-06-05 21:10:47,054 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:10:47,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:10:47,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:10:47,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:10:47,054 INFO L87 Difference]: Start difference. First operand 14646 states and 36736 transitions. Second operand has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 16 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:47,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:10:47,589 INFO L93 Difference]: Finished difference Result 21283 states and 51152 transitions. [2021-06-05 21:10:47,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 21:10:47,590 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 16 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:10:47,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:10:47,612 INFO L225 Difference]: With dead ends: 21283 [2021-06-05 21:10:47,613 INFO L226 Difference]: Without dead ends: 21283 [2021-06-05 21:10:47,613 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 298.0ms TimeCoverageRelationStatistics Valid=473, Invalid=787, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 21:10:47,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21283 states. [2021-06-05 21:10:47,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21283 to 14683. [2021-06-05 21:10:47,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14683 states, 14682 states have (on average 2.5098760386868273) internal successors, (36850), 14682 states have internal predecessors, (36850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:47,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14683 states to 14683 states and 36850 transitions. [2021-06-05 21:10:47,835 INFO L78 Accepts]: Start accepts. Automaton has 14683 states and 36850 transitions. Word has length 59 [2021-06-05 21:10:47,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:10:47,835 INFO L482 AbstractCegarLoop]: Abstraction has 14683 states and 36850 transitions. [2021-06-05 21:10:47,835 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 16 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:47,835 INFO L276 IsEmpty]: Start isEmpty. Operand 14683 states and 36850 transitions. [2021-06-05 21:10:47,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:10:47,844 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:10:47,844 INFO L554 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:10:48,045 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1065,506 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:10:48,045 INFO L430 AbstractCegarLoop]: === Iteration 515 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:10:48,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:10:48,045 INFO L82 PathProgramCache]: Analyzing trace with hash 963399396, now seen corresponding path program 149 times [2021-06-05 21:10:48,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:10:48,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46318510] [2021-06-05 21:10:48,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:10:48,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:10:48,182 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 112 proven. 65 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:10:48,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:10:48,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46318510] [2021-06-05 21:10:48,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46318510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:48,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415811770] [2021-06-05 21:10:48,183 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 507 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 507 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:10:48,217 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-06-05 21:10:48,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:10:48,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:10:48,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:10:48,376 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 113 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:10:48,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415811770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:48,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:10:48,376 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 25 [2021-06-05 21:10:48,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829414074] [2021-06-05 21:10:48,376 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 21:10:48,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:10:48,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 21:10:48,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=469, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:10:48,377 INFO L87 Difference]: Start difference. First operand 14683 states and 36850 transitions. Second operand has 26 states, 26 states have (on average 3.5) internal successors, (91), 25 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:49,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:10:49,092 INFO L93 Difference]: Finished difference Result 19401 states and 46815 transitions. [2021-06-05 21:10:49,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 21:10:49,093 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.5) internal successors, (91), 25 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:10:49,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:10:49,114 INFO L225 Difference]: With dead ends: 19401 [2021-06-05 21:10:49,114 INFO L226 Difference]: Without dead ends: 19401 [2021-06-05 21:10:49,115 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 384.3ms TimeCoverageRelationStatistics Valid=617, Invalid=1189, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 21:10:49,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19401 states. [2021-06-05 21:10:49,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19401 to 14710. [2021-06-05 21:10:49,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14710 states, 14709 states have (on average 2.5105717587871372) internal successors, (36928), 14709 states have internal predecessors, (36928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:49,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14710 states to 14710 states and 36928 transitions. [2021-06-05 21:10:49,342 INFO L78 Accepts]: Start accepts. Automaton has 14710 states and 36928 transitions. Word has length 59 [2021-06-05 21:10:49,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:10:49,342 INFO L482 AbstractCegarLoop]: Abstraction has 14710 states and 36928 transitions. [2021-06-05 21:10:49,342 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 3.5) internal successors, (91), 25 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:49,342 INFO L276 IsEmpty]: Start isEmpty. Operand 14710 states and 36928 transitions. [2021-06-05 21:10:49,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:10:49,352 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:10:49,352 INFO L554 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:10:49,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 507 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1066 [2021-06-05 21:10:49,552 INFO L430 AbstractCegarLoop]: === Iteration 516 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:10:49,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:10:49,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1720422728, now seen corresponding path program 150 times [2021-06-05 21:10:49,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:10:49,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668193124] [2021-06-05 21:10:49,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:10:49,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:10:49,698 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 108 proven. 70 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:10:49,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:10:49,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668193124] [2021-06-05 21:10:49,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668193124] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:49,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102789540] [2021-06-05 21:10:49,698 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 508 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 508 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:10:49,732 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-06-05 21:10:49,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:10:49,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:10:49,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:10:49,826 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 109 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:10:49,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102789540] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:49,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:10:49,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 18 [2021-06-05 21:10:49,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923734839] [2021-06-05 21:10:49,827 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:10:49,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:10:49,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:10:49,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:10:49,827 INFO L87 Difference]: Start difference. First operand 14710 states and 36928 transitions. Second operand has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 18 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:50,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:10:50,360 INFO L93 Difference]: Finished difference Result 16916 states and 41381 transitions. [2021-06-05 21:10:50,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:10:50,360 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 18 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:10:50,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:10:50,378 INFO L225 Difference]: With dead ends: 16916 [2021-06-05 21:10:50,378 INFO L226 Difference]: Without dead ends: 16916 [2021-06-05 21:10:50,378 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 279.3ms TimeCoverageRelationStatistics Valid=347, Invalid=645, Unknown=0, NotChecked=0, Total=992 [2021-06-05 21:10:50,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16916 states. [2021-06-05 21:10:50,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16916 to 13840. [2021-06-05 21:10:50,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13840 states, 13839 states have (on average 2.5019148782426477) internal successors, (34624), 13839 states have internal predecessors, (34624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:50,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13840 states to 13840 states and 34624 transitions. [2021-06-05 21:10:50,577 INFO L78 Accepts]: Start accepts. Automaton has 13840 states and 34624 transitions. Word has length 59 [2021-06-05 21:10:50,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:10:50,577 INFO L482 AbstractCegarLoop]: Abstraction has 13840 states and 34624 transitions. [2021-06-05 21:10:50,577 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 18 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:50,577 INFO L276 IsEmpty]: Start isEmpty. Operand 13840 states and 34624 transitions. [2021-06-05 21:10:50,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:10:50,586 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:10:50,586 INFO L554 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:10:50,786 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1067,508 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:10:50,786 INFO L430 AbstractCegarLoop]: === Iteration 517 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:10:50,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:10:50,787 INFO L82 PathProgramCache]: Analyzing trace with hash -1305517528, now seen corresponding path program 308 times [2021-06-05 21:10:50,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:10:50,787 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37453300] [2021-06-05 21:10:50,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:10:50,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:10:50,919 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 76 proven. 102 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:10:50,920 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:10:50,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37453300] [2021-06-05 21:10:50,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37453300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:50,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113779387] [2021-06-05 21:10:50,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 509 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 509 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:10:50,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:10:50,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:10:50,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:10:50,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:10:51,038 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 76 proven. 102 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:10:51,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113779387] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:51,038 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:10:51,038 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-06-05 21:10:51,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085227063] [2021-06-05 21:10:51,038 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:10:51,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:10:51,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:10:51,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:10:51,038 INFO L87 Difference]: Start difference. First operand 13840 states and 34624 transitions. Second operand has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:51,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:10:51,345 INFO L93 Difference]: Finished difference Result 16377 states and 39177 transitions. [2021-06-05 21:10:51,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:10:51,345 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:10:51,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:10:51,362 INFO L225 Difference]: With dead ends: 16377 [2021-06-05 21:10:51,362 INFO L226 Difference]: Without dead ends: 16314 [2021-06-05 21:10:51,363 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 197.6ms TimeCoverageRelationStatistics Valid=204, Invalid=446, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:10:51,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16314 states. [2021-06-05 21:10:51,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16314 to 13849. [2021-06-05 21:10:51,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13849 states, 13848 states have (on average 2.500938763720393) internal successors, (34633), 13848 states have internal predecessors, (34633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:51,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13849 states to 13849 states and 34633 transitions. [2021-06-05 21:10:51,546 INFO L78 Accepts]: Start accepts. Automaton has 13849 states and 34633 transitions. Word has length 59 [2021-06-05 21:10:51,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:10:51,546 INFO L482 AbstractCegarLoop]: Abstraction has 13849 states and 34633 transitions. [2021-06-05 21:10:51,546 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:51,546 INFO L276 IsEmpty]: Start isEmpty. Operand 13849 states and 34633 transitions. [2021-06-05 21:10:51,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:10:51,554 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:10:51,554 INFO L554 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:10:51,754 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 509 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1068 [2021-06-05 21:10:51,754 INFO L430 AbstractCegarLoop]: === Iteration 518 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:10:51,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:10:51,755 INFO L82 PathProgramCache]: Analyzing trace with hash -290755390, now seen corresponding path program 309 times [2021-06-05 21:10:51,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:10:51,755 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667439688] [2021-06-05 21:10:51,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:10:51,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:10:51,895 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 90 proven. 87 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:10:51,895 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:10:51,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667439688] [2021-06-05 21:10:51,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667439688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:51,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251025334] [2021-06-05 21:10:51,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 510 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 510 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:10:51,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-06-05 21:10:51,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:10:51,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:10:51,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:10:52,016 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 90 proven. 87 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:10:52,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251025334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:52,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:10:52,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-06-05 21:10:52,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626856314] [2021-06-05 21:10:52,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:10:52,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:10:52,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:10:52,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:10:52,017 INFO L87 Difference]: Start difference. First operand 13849 states and 34633 transitions. Second operand has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:52,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:10:52,554 INFO L93 Difference]: Finished difference Result 16221 states and 39411 transitions. [2021-06-05 21:10:52,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:10:52,555 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:10:52,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:10:52,572 INFO L225 Difference]: With dead ends: 16221 [2021-06-05 21:10:52,572 INFO L226 Difference]: Without dead ends: 16221 [2021-06-05 21:10:52,572 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 267.0ms TimeCoverageRelationStatistics Valid=324, Invalid=606, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:10:52,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16221 states. [2021-06-05 21:10:52,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16221 to 13663. [2021-06-05 21:10:52,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13663 states, 13662 states have (on average 2.506441223832528) internal successors, (34243), 13662 states have internal predecessors, (34243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:52,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13663 states to 13663 states and 34243 transitions. [2021-06-05 21:10:52,762 INFO L78 Accepts]: Start accepts. Automaton has 13663 states and 34243 transitions. Word has length 59 [2021-06-05 21:10:52,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:10:52,762 INFO L482 AbstractCegarLoop]: Abstraction has 13663 states and 34243 transitions. [2021-06-05 21:10:52,763 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:52,763 INFO L276 IsEmpty]: Start isEmpty. Operand 13663 states and 34243 transitions. [2021-06-05 21:10:52,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:10:52,771 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:10:52,771 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:10:52,971 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 510 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1077 [2021-06-05 21:10:52,972 INFO L430 AbstractCegarLoop]: === Iteration 519 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:10:52,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:10:52,972 INFO L82 PathProgramCache]: Analyzing trace with hash -1740888523, now seen corresponding path program 151 times [2021-06-05 21:10:52,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:10:52,972 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274424896] [2021-06-05 21:10:52,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:10:52,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:10:53,121 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 167 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:10:53,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:10:53,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274424896] [2021-06-05 21:10:53,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274424896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:53,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182516956] [2021-06-05 21:10:53,121 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 511 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 511 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:10:53,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:10:53,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 21:10:53,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:10:53,235 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 167 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:10:53,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182516956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:53,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:10:53,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-06-05 21:10:53,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652864334] [2021-06-05 21:10:53,235 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:10:53,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:10:53,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:10:53,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:10:53,236 INFO L87 Difference]: Start difference. First operand 13663 states and 34243 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:54,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:10:54,046 INFO L93 Difference]: Finished difference Result 18431 states and 44151 transitions. [2021-06-05 21:10:54,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 21:10:54,046 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:10:54,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:10:54,065 INFO L225 Difference]: With dead ends: 18431 [2021-06-05 21:10:54,065 INFO L226 Difference]: Without dead ends: 18317 [2021-06-05 21:10:54,065 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 430.9ms TimeCoverageRelationStatistics Valid=224, Invalid=1182, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 21:10:54,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18317 states. [2021-06-05 21:10:54,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18317 to 13282. [2021-06-05 21:10:54,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13282 states, 13281 states have (on average 2.505157744145772) internal successors, (33271), 13281 states have internal predecessors, (33271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:54,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13282 states to 13282 states and 33271 transitions. [2021-06-05 21:10:54,258 INFO L78 Accepts]: Start accepts. Automaton has 13282 states and 33271 transitions. Word has length 59 [2021-06-05 21:10:54,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:10:54,258 INFO L482 AbstractCegarLoop]: Abstraction has 13282 states and 33271 transitions. [2021-06-05 21:10:54,258 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:54,258 INFO L276 IsEmpty]: Start isEmpty. Operand 13282 states and 33271 transitions. [2021-06-05 21:10:54,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:10:54,267 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:10:54,267 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:10:54,467 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 511 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1078 [2021-06-05 21:10:54,467 INFO L430 AbstractCegarLoop]: === Iteration 520 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:10:54,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:10:54,467 INFO L82 PathProgramCache]: Analyzing trace with hash 285880821, now seen corresponding path program 310 times [2021-06-05 21:10:54,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:10:54,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276019474] [2021-06-05 21:10:54,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:10:54,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:10:54,695 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 18 proven. 157 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:10:54,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:10:54,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276019474] [2021-06-05 21:10:54,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276019474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:54,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197383582] [2021-06-05 21:10:54,695 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 512 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 512 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:10:54,724 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:10:54,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:10:54,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 21:10:54,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:10:55,002 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 160 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:10:55,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197383582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:55,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:10:55,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 23 [2021-06-05 21:10:55,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812931429] [2021-06-05 21:10:55,003 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 21:10:55,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:10:55,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 21:10:55,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:10:55,003 INFO L87 Difference]: Start difference. First operand 13282 states and 33271 transitions. Second operand has 24 states, 24 states have (on average 3.375) internal successors, (81), 23 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:56,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:10:56,044 INFO L93 Difference]: Finished difference Result 13442 states and 33525 transitions. [2021-06-05 21:10:56,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:10:56,044 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.375) internal successors, (81), 23 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:10:56,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:10:56,060 INFO L225 Difference]: With dead ends: 13442 [2021-06-05 21:10:56,060 INFO L226 Difference]: Without dead ends: 13362 [2021-06-05 21:10:56,061 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 371.7ms TimeCoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:10:56,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13362 states. [2021-06-05 21:10:56,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13362 to 13282. [2021-06-05 21:10:56,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13282 states, 13281 states have (on average 2.5013176718620587) internal successors, (33220), 13281 states have internal predecessors, (33220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:56,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13282 states to 13282 states and 33220 transitions. [2021-06-05 21:10:56,229 INFO L78 Accepts]: Start accepts. Automaton has 13282 states and 33220 transitions. Word has length 59 [2021-06-05 21:10:56,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:10:56,229 INFO L482 AbstractCegarLoop]: Abstraction has 13282 states and 33220 transitions. [2021-06-05 21:10:56,229 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 3.375) internal successors, (81), 23 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:56,229 INFO L276 IsEmpty]: Start isEmpty. Operand 13282 states and 33220 transitions. [2021-06-05 21:10:56,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:10:56,238 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:10:56,238 INFO L554 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:10:56,438 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 512 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1079 [2021-06-05 21:10:56,438 INFO L430 AbstractCegarLoop]: === Iteration 521 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:10:56,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:10:56,438 INFO L82 PathProgramCache]: Analyzing trace with hash 233038186, now seen corresponding path program 311 times [2021-06-05 21:10:56,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:10:56,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666107660] [2021-06-05 21:10:56,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:10:56,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:10:56,563 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 88 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:10:56,563 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:10:56,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666107660] [2021-06-05 21:10:56,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666107660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:56,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817361065] [2021-06-05 21:10:56,564 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 513 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 513 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:10:56,595 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-05 21:10:56,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:10:56,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:10:56,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:10:56,776 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 88 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:10:56,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817361065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:56,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:10:56,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 27 [2021-06-05 21:10:56,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064561827] [2021-06-05 21:10:56,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 21:10:56,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:10:56,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 21:10:56,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=567, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:10:56,777 INFO L87 Difference]: Start difference. First operand 13282 states and 33220 transitions. Second operand has 28 states, 28 states have (on average 3.4642857142857144) internal successors, (97), 27 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:57,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:10:57,537 INFO L93 Difference]: Finished difference Result 16482 states and 39782 transitions. [2021-06-05 21:10:57,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 21:10:57,538 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.4642857142857144) internal successors, (97), 27 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:10:57,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:10:57,556 INFO L225 Difference]: With dead ends: 16482 [2021-06-05 21:10:57,556 INFO L226 Difference]: Without dead ends: 16482 [2021-06-05 21:10:57,556 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 360.7ms TimeCoverageRelationStatistics Valid=499, Invalid=1223, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 21:10:57,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16482 states. [2021-06-05 21:10:57,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16482 to 13694. [2021-06-05 21:10:57,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13694 states, 13693 states have (on average 2.5162491784123273) internal successors, (34455), 13693 states have internal predecessors, (34455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:57,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13694 states to 13694 states and 34455 transitions. [2021-06-05 21:10:57,748 INFO L78 Accepts]: Start accepts. Automaton has 13694 states and 34455 transitions. Word has length 59 [2021-06-05 21:10:57,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:10:57,748 INFO L482 AbstractCegarLoop]: Abstraction has 13694 states and 34455 transitions. [2021-06-05 21:10:57,748 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 3.4642857142857144) internal successors, (97), 27 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:57,748 INFO L276 IsEmpty]: Start isEmpty. Operand 13694 states and 34455 transitions. [2021-06-05 21:10:57,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:10:57,757 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:10:57,757 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:10:57,957 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1080,513 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:10:57,957 INFO L430 AbstractCegarLoop]: === Iteration 522 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:10:57,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:10:57,957 INFO L82 PathProgramCache]: Analyzing trace with hash -2141933289, now seen corresponding path program 152 times [2021-06-05 21:10:57,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:10:57,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394233833] [2021-06-05 21:10:57,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:10:57,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:10:58,095 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 167 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:10:58,096 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:10:58,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394233833] [2021-06-05 21:10:58,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394233833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:58,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029676750] [2021-06-05 21:10:58,096 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 514 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 514 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:10:58,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:10:58,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:10:58,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:10:58,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:10:58,913 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 49 proven. 127 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:10:58,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029676750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:58,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:10:58,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 33 [2021-06-05 21:10:58,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300732700] [2021-06-05 21:10:58,914 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 21:10:58,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:10:58,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 21:10:58,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1004, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 21:10:58,914 INFO L87 Difference]: Start difference. First operand 13694 states and 34455 transitions. Second operand has 34 states, 34 states have (on average 3.1470588235294117) internal successors, (107), 33 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:08,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:11:08,426 INFO L93 Difference]: Finished difference Result 28070 states and 65966 transitions. [2021-06-05 21:11:08,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 229 states. [2021-06-05 21:11:08,426 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.1470588235294117) internal successors, (107), 33 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:11:08,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:11:08,455 INFO L225 Difference]: With dead ends: 28070 [2021-06-05 21:11:08,455 INFO L226 Difference]: Without dead ends: 27508 [2021-06-05 21:11:08,457 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23843 ImplicationChecksByTransitivity, 7810.9ms TimeCoverageRelationStatistics Valid=7596, Invalid=53166, Unknown=0, NotChecked=0, Total=60762 [2021-06-05 21:11:08,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27508 states. [2021-06-05 21:11:08,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27508 to 13479. [2021-06-05 21:11:08,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13479 states, 13478 states have (on average 2.5634367116782903) internal successors, (34550), 13478 states have internal predecessors, (34550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:08,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13479 states to 13479 states and 34550 transitions. [2021-06-05 21:11:08,702 INFO L78 Accepts]: Start accepts. Automaton has 13479 states and 34550 transitions. Word has length 59 [2021-06-05 21:11:08,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:11:08,702 INFO L482 AbstractCegarLoop]: Abstraction has 13479 states and 34550 transitions. [2021-06-05 21:11:08,702 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 3.1470588235294117) internal successors, (107), 33 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:08,702 INFO L276 IsEmpty]: Start isEmpty. Operand 13479 states and 34550 transitions. [2021-06-05 21:11:08,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:11:08,711 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:11:08,711 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:11:08,911 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1081,514 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:11:08,911 INFO L430 AbstractCegarLoop]: === Iteration 523 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:11:08,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:11:08,912 INFO L82 PathProgramCache]: Analyzing trace with hash 229597463, now seen corresponding path program 312 times [2021-06-05 21:11:08,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:11:08,912 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679589248] [2021-06-05 21:11:08,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:11:08,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:11:09,061 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 18 proven. 157 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:11:09,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:11:09,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679589248] [2021-06-05 21:11:09,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679589248] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:09,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575552764] [2021-06-05 21:11:09,061 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 515 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 515 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:11:09,093 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 21:11:09,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:11:09,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 21:11:09,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:11:09,343 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 160 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:11:09,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575552764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:09,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:11:09,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2021-06-05 21:11:09,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291437163] [2021-06-05 21:11:09,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:11:09,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:11:09,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:11:09,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:11:09,344 INFO L87 Difference]: Start difference. First operand 13479 states and 34550 transitions. Second operand has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:10,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:11:10,251 INFO L93 Difference]: Finished difference Result 13564 states and 34688 transitions. [2021-06-05 21:11:10,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:11:10,252 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:11:10,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:11:10,268 INFO L225 Difference]: With dead ends: 13564 [2021-06-05 21:11:10,268 INFO L226 Difference]: Without dead ends: 13496 [2021-06-05 21:11:10,268 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 248.4ms TimeCoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:11:10,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13496 states. [2021-06-05 21:11:10,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13496 to 13479. [2021-06-05 21:11:10,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13479 states, 13478 states have (on average 2.561210862145719) internal successors, (34520), 13478 states have internal predecessors, (34520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:10,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13479 states to 13479 states and 34520 transitions. [2021-06-05 21:11:10,437 INFO L78 Accepts]: Start accepts. Automaton has 13479 states and 34520 transitions. Word has length 59 [2021-06-05 21:11:10,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:11:10,437 INFO L482 AbstractCegarLoop]: Abstraction has 13479 states and 34520 transitions. [2021-06-05 21:11:10,437 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:10,437 INFO L276 IsEmpty]: Start isEmpty. Operand 13479 states and 34520 transitions. [2021-06-05 21:11:10,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:11:10,445 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:11:10,445 INFO L554 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:11:10,646 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1091,515 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:11:10,646 INFO L430 AbstractCegarLoop]: === Iteration 524 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:11:10,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:11:10,646 INFO L82 PathProgramCache]: Analyzing trace with hash -1178079806, now seen corresponding path program 313 times [2021-06-05 21:11:10,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:11:10,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332323224] [2021-06-05 21:11:10,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:11:10,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:11:10,757 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 86 proven. 91 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:11:10,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:11:10,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332323224] [2021-06-05 21:11:10,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332323224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:10,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234032099] [2021-06-05 21:11:10,757 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 516 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 516 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:11:10,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:11:10,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:11:10,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:11:10,876 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 86 proven. 91 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:11:10,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234032099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:10,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:11:10,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-06-05 21:11:10,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556237804] [2021-06-05 21:11:10,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:11:10,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:11:10,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:11:10,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:11:10,877 INFO L87 Difference]: Start difference. First operand 13479 states and 34520 transitions. Second operand has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:11,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:11:11,225 INFO L93 Difference]: Finished difference Result 16700 states and 41187 transitions. [2021-06-05 21:11:11,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:11:11,225 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:11:11,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:11:11,244 INFO L225 Difference]: With dead ends: 16700 [2021-06-05 21:11:11,244 INFO L226 Difference]: Without dead ends: 16700 [2021-06-05 21:11:11,244 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 180.8ms TimeCoverageRelationStatistics Valid=219, Invalid=381, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:11:11,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16700 states. [2021-06-05 21:11:11,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16700 to 14028. [2021-06-05 21:11:11,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14028 states, 14027 states have (on average 2.578099379767591) internal successors, (36163), 14027 states have internal predecessors, (36163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:11,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14028 states to 14028 states and 36163 transitions. [2021-06-05 21:11:11,437 INFO L78 Accepts]: Start accepts. Automaton has 14028 states and 36163 transitions. Word has length 59 [2021-06-05 21:11:11,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:11:11,437 INFO L482 AbstractCegarLoop]: Abstraction has 14028 states and 36163 transitions. [2021-06-05 21:11:11,437 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:11,437 INFO L276 IsEmpty]: Start isEmpty. Operand 14028 states and 36163 transitions. [2021-06-05 21:11:11,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:11:11,445 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:11:11,445 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:11:11,646 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1092,516 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:11:11,646 INFO L430 AbstractCegarLoop]: === Iteration 525 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:11:11,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:11:11,646 INFO L82 PathProgramCache]: Analyzing trace with hash 1136189813, now seen corresponding path program 153 times [2021-06-05 21:11:11,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:11:11,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954972208] [2021-06-05 21:11:11,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:11:11,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:11:11,770 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 167 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:11:11,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:11:11,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954972208] [2021-06-05 21:11:11,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954972208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:11,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628083107] [2021-06-05 21:11:11,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 517 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 517 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:11:11,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 21:11:11,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:11:11,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 21:11:11,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:11:11,886 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 167 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:11:11,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628083107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:11,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:11:11,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 21:11:11,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789598683] [2021-06-05 21:11:11,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:11:11,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:11:11,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:11:11,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:11:11,887 INFO L87 Difference]: Start difference. First operand 14028 states and 36163 transitions. Second operand has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:12,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:11:12,593 INFO L93 Difference]: Finished difference Result 19202 states and 47249 transitions. [2021-06-05 21:11:12,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:11:12,593 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:11:12,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:11:12,665 INFO L225 Difference]: With dead ends: 19202 [2021-06-05 21:11:12,665 INFO L226 Difference]: Without dead ends: 19070 [2021-06-05 21:11:12,665 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 304.6ms TimeCoverageRelationStatistics Valid=144, Invalid=848, Unknown=0, NotChecked=0, Total=992 [2021-06-05 21:11:12,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19070 states. [2021-06-05 21:11:12,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19070 to 13945. [2021-06-05 21:11:12,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13945 states, 13944 states have (on average 2.57723752151463) internal successors, (35937), 13944 states have internal predecessors, (35937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:12,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13945 states to 13945 states and 35937 transitions. [2021-06-05 21:11:12,853 INFO L78 Accepts]: Start accepts. Automaton has 13945 states and 35937 transitions. Word has length 59 [2021-06-05 21:11:12,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:11:12,853 INFO L482 AbstractCegarLoop]: Abstraction has 13945 states and 35937 transitions. [2021-06-05 21:11:12,853 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:12,853 INFO L276 IsEmpty]: Start isEmpty. Operand 13945 states and 35937 transitions. [2021-06-05 21:11:12,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:11:12,861 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:11:12,861 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:11:13,062 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1093,517 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:11:13,062 INFO L430 AbstractCegarLoop]: === Iteration 526 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:11:13,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:11:13,062 INFO L82 PathProgramCache]: Analyzing trace with hash 656626997, now seen corresponding path program 314 times [2021-06-05 21:11:13,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:11:13,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172531325] [2021-06-05 21:11:13,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:11:13,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:11:13,195 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 18 proven. 157 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:11:13,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:11:13,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172531325] [2021-06-05 21:11:13,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172531325] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:13,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133976019] [2021-06-05 21:11:13,195 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 518 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 518 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:11:13,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:11:13,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:11:13,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 21:11:13,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:11:13,424 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 160 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:11:13,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133976019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:13,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:11:13,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 21:11:13,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213557102] [2021-06-05 21:11:13,425 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 21:11:13,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:11:13,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 21:11:13,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:11:13,425 INFO L87 Difference]: Start difference. First operand 13945 states and 35937 transitions. Second operand has 20 states, 20 states have (on average 3.75) internal successors, (75), 19 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:14,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:11:14,305 INFO L93 Difference]: Finished difference Result 14171 states and 36291 transitions. [2021-06-05 21:11:14,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:11:14,306 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.75) internal successors, (75), 19 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:11:14,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:11:14,320 INFO L225 Difference]: With dead ends: 14171 [2021-06-05 21:11:14,321 INFO L226 Difference]: Without dead ends: 14115 [2021-06-05 21:11:14,321 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 245.7ms TimeCoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:11:14,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14115 states. [2021-06-05 21:11:14,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14115 to 13945. [2021-06-05 21:11:14,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13945 states, 13944 states have (on average 2.5748709122203097) internal successors, (35904), 13944 states have internal predecessors, (35904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:14,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13945 states to 13945 states and 35904 transitions. [2021-06-05 21:11:14,497 INFO L78 Accepts]: Start accepts. Automaton has 13945 states and 35904 transitions. Word has length 59 [2021-06-05 21:11:14,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:11:14,497 INFO L482 AbstractCegarLoop]: Abstraction has 13945 states and 35904 transitions. [2021-06-05 21:11:14,497 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.75) internal successors, (75), 19 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:14,497 INFO L276 IsEmpty]: Start isEmpty. Operand 13945 states and 35904 transitions. [2021-06-05 21:11:14,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:11:14,506 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:11:14,506 INFO L554 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:11:14,706 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1094,518 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:11:14,706 INFO L430 AbstractCegarLoop]: === Iteration 527 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:11:14,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:11:14,706 INFO L82 PathProgramCache]: Analyzing trace with hash -1251305348, now seen corresponding path program 154 times [2021-06-05 21:11:14,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:11:14,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280205426] [2021-06-05 21:11:14,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:11:14,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:11:14,800 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 52 proven. 124 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:11:14,800 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:11:14,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280205426] [2021-06-05 21:11:14,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280205426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:14,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332332946] [2021-06-05 21:11:14,800 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 519 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 519 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:11:14,828 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:11:14,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:11:14,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:11:14,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:11:14,918 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 53 proven. 124 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:11:14,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332332946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:14,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:11:14,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 15 [2021-06-05 21:11:14,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873113509] [2021-06-05 21:11:14,918 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:11:14,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:11:14,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:11:14,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:11:14,918 INFO L87 Difference]: Start difference. First operand 13945 states and 35904 transitions. Second operand has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:15,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:11:15,168 INFO L93 Difference]: Finished difference Result 16427 states and 40999 transitions. [2021-06-05 21:11:15,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:11:15,168 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:11:15,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:11:15,187 INFO L225 Difference]: With dead ends: 16427 [2021-06-05 21:11:15,187 INFO L226 Difference]: Without dead ends: 16325 [2021-06-05 21:11:15,187 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 130.1ms TimeCoverageRelationStatistics Valid=128, Invalid=292, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:11:15,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16325 states. [2021-06-05 21:11:15,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16325 to 12866. [2021-06-05 21:11:15,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12866 states, 12865 states have (on average 2.5769141080450835) internal successors, (33152), 12865 states have internal predecessors, (33152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:15,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12866 states to 12866 states and 33152 transitions. [2021-06-05 21:11:15,375 INFO L78 Accepts]: Start accepts. Automaton has 12866 states and 33152 transitions. Word has length 59 [2021-06-05 21:11:15,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:11:15,375 INFO L482 AbstractCegarLoop]: Abstraction has 12866 states and 33152 transitions. [2021-06-05 21:11:15,376 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:15,376 INFO L276 IsEmpty]: Start isEmpty. Operand 12866 states and 33152 transitions. [2021-06-05 21:11:15,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:11:15,383 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:11:15,383 INFO L554 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:11:15,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 519 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1095 [2021-06-05 21:11:15,584 INFO L430 AbstractCegarLoop]: === Iteration 528 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:11:15,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:11:15,584 INFO L82 PathProgramCache]: Analyzing trace with hash -151060374, now seen corresponding path program 315 times [2021-06-05 21:11:15,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:11:15,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254196601] [2021-06-05 21:11:15,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:11:15,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:11:15,678 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 84 proven. 93 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:11:15,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:11:15,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254196601] [2021-06-05 21:11:15,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254196601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:15,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091055525] [2021-06-05 21:11:15,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 520 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 520 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:11:15,711 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-06-05 21:11:15,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:11:15,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:11:15,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:11:15,799 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 84 proven. 93 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:11:15,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091055525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:15,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:11:15,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-05 21:11:15,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559199793] [2021-06-05 21:11:15,799 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:11:15,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:11:15,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:11:15,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:11:15,800 INFO L87 Difference]: Start difference. First operand 12866 states and 33152 transitions. Second operand has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:16,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:11:16,117 INFO L93 Difference]: Finished difference Result 16089 states and 39723 transitions. [2021-06-05 21:11:16,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:11:16,117 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:11:16,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:11:16,134 INFO L225 Difference]: With dead ends: 16089 [2021-06-05 21:11:16,134 INFO L226 Difference]: Without dead ends: 16089 [2021-06-05 21:11:16,134 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 144.4ms TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:11:16,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16089 states. [2021-06-05 21:11:16,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16089 to 13293. [2021-06-05 21:11:16,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13293 states, 13292 states have (on average 2.59043033403551) internal successors, (34432), 13292 states have internal predecessors, (34432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:16,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13293 states to 13293 states and 34432 transitions. [2021-06-05 21:11:16,319 INFO L78 Accepts]: Start accepts. Automaton has 13293 states and 34432 transitions. Word has length 59 [2021-06-05 21:11:16,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:11:16,319 INFO L482 AbstractCegarLoop]: Abstraction has 13293 states and 34432 transitions. [2021-06-05 21:11:16,319 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:16,319 INFO L276 IsEmpty]: Start isEmpty. Operand 13293 states and 34432 transitions. [2021-06-05 21:11:16,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:11:16,326 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:11:16,326 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:11:16,527 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 520 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1101 [2021-06-05 21:11:16,527 INFO L430 AbstractCegarLoop]: === Iteration 529 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:11:16,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:11:16,527 INFO L82 PathProgramCache]: Analyzing trace with hash 541310423, now seen corresponding path program 155 times [2021-06-05 21:11:16,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:11:16,527 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827073829] [2021-06-05 21:11:16,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:11:16,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:11:16,639 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 167 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:11:16,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:11:16,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827073829] [2021-06-05 21:11:16,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827073829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:16,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414897928] [2021-06-05 21:11:16,639 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 521 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 521 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:11:16,671 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 21:11:16,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:11:16,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 21:11:16,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:11:16,756 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 167 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:11:16,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414897928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:16,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:11:16,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:11:16,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227389461] [2021-06-05 21:11:16,756 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:11:16,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:11:16,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:11:16,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:11:16,757 INFO L87 Difference]: Start difference. First operand 13293 states and 34432 transitions. Second operand has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:17,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:11:17,437 INFO L93 Difference]: Finished difference Result 17164 states and 42755 transitions. [2021-06-05 21:11:17,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:11:17,437 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:11:17,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:11:17,456 INFO L225 Difference]: With dead ends: 17164 [2021-06-05 21:11:17,456 INFO L226 Difference]: Without dead ends: 17150 [2021-06-05 21:11:17,456 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 251.8ms TimeCoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:11:17,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17150 states. [2021-06-05 21:11:17,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17150 to 13291. [2021-06-05 21:11:17,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13291 states, 13290 states have (on average 2.593453724604966) internal successors, (34467), 13290 states have internal predecessors, (34467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:17,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13291 states to 13291 states and 34467 transitions. [2021-06-05 21:11:17,653 INFO L78 Accepts]: Start accepts. Automaton has 13291 states and 34467 transitions. Word has length 59 [2021-06-05 21:11:17,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:11:17,653 INFO L482 AbstractCegarLoop]: Abstraction has 13291 states and 34467 transitions. [2021-06-05 21:11:17,653 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:17,653 INFO L276 IsEmpty]: Start isEmpty. Operand 13291 states and 34467 transitions. [2021-06-05 21:11:17,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:11:17,662 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:11:17,662 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:11:17,862 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 521 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1102 [2021-06-05 21:11:17,863 INFO L430 AbstractCegarLoop]: === Iteration 530 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:11:17,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:11:17,863 INFO L82 PathProgramCache]: Analyzing trace with hash 379258327, now seen corresponding path program 316 times [2021-06-05 21:11:17,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:11:17,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201024415] [2021-06-05 21:11:17,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:11:17,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:11:17,984 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 18 proven. 157 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:11:17,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:11:17,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201024415] [2021-06-05 21:11:17,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201024415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:17,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818378162] [2021-06-05 21:11:17,985 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 522 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 522 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:11:18,014 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:11:18,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:11:18,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 21:11:18,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:11:18,281 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 160 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:11:18,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818378162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:18,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:11:18,281 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 17 [2021-06-05 21:11:18,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967897047] [2021-06-05 21:11:18,281 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:11:18,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:11:18,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:11:18,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:11:18,282 INFO L87 Difference]: Start difference. First operand 13291 states and 34467 transitions. Second operand has 18 states, 18 states have (on average 4.0) internal successors, (72), 17 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:18,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:11:18,907 INFO L93 Difference]: Finished difference Result 13395 states and 34626 transitions. [2021-06-05 21:11:18,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:11:18,907 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.0) internal successors, (72), 17 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:11:18,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:11:18,923 INFO L225 Difference]: With dead ends: 13395 [2021-06-05 21:11:18,923 INFO L226 Difference]: Without dead ends: 13351 [2021-06-05 21:11:18,923 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 277.8ms TimeCoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:11:18,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13351 states. [2021-06-05 21:11:19,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13351 to 13291. [2021-06-05 21:11:19,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13291 states, 13290 states have (on average 2.5927765237020317) internal successors, (34458), 13290 states have internal predecessors, (34458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:19,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13291 states to 13291 states and 34458 transitions. [2021-06-05 21:11:19,087 INFO L78 Accepts]: Start accepts. Automaton has 13291 states and 34458 transitions. Word has length 59 [2021-06-05 21:11:19,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:11:19,087 INFO L482 AbstractCegarLoop]: Abstraction has 13291 states and 34458 transitions. [2021-06-05 21:11:19,087 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.0) internal successors, (72), 17 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:19,087 INFO L276 IsEmpty]: Start isEmpty. Operand 13291 states and 34458 transitions. [2021-06-05 21:11:19,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:11:19,096 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:11:19,096 INFO L554 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:11:19,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1103,522 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:11:19,297 INFO L430 AbstractCegarLoop]: === Iteration 531 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:11:19,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:11:19,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1601439350, now seen corresponding path program 156 times [2021-06-05 21:11:19,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:11:19,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502882419] [2021-06-05 21:11:19,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:11:19,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:11:19,393 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 63 proven. 114 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:11:19,393 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:11:19,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502882419] [2021-06-05 21:11:19,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502882419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:19,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548371501] [2021-06-05 21:11:19,393 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 523 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 523 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:11:19,424 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 21:11:19,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:11:19,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:11:19,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:11:19,543 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 65 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:11:19,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548371501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:19,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:11:19,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 19 [2021-06-05 21:11:19,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036168602] [2021-06-05 21:11:19,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 21:11:19,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:11:19,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 21:11:19,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:11:19,544 INFO L87 Difference]: Start difference. First operand 13291 states and 34458 transitions. Second operand has 20 states, 20 states have (on average 3.95) internal successors, (79), 19 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:19,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:11:19,877 INFO L93 Difference]: Finished difference Result 15297 states and 38508 transitions. [2021-06-05 21:11:19,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:11:19,878 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.95) internal successors, (79), 19 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:11:19,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:11:19,896 INFO L225 Difference]: With dead ends: 15297 [2021-06-05 21:11:19,896 INFO L226 Difference]: Without dead ends: 15243 [2021-06-05 21:11:19,896 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 154.7ms TimeCoverageRelationStatistics Valid=135, Invalid=417, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:11:19,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15243 states. [2021-06-05 21:11:20,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15243 to 13345. [2021-06-05 21:11:20,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13345 states, 13344 states have (on average 2.5953986810551557) internal successors, (34633), 13344 states have internal predecessors, (34633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:20,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13345 states to 13345 states and 34633 transitions. [2021-06-05 21:11:20,080 INFO L78 Accepts]: Start accepts. Automaton has 13345 states and 34633 transitions. Word has length 59 [2021-06-05 21:11:20,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:11:20,080 INFO L482 AbstractCegarLoop]: Abstraction has 13345 states and 34633 transitions. [2021-06-05 21:11:20,080 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.95) internal successors, (79), 19 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:20,080 INFO L276 IsEmpty]: Start isEmpty. Operand 13345 states and 34633 transitions. [2021-06-05 21:11:20,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:11:20,088 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:11:20,088 INFO L554 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:11:20,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 523 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1104 [2021-06-05 21:11:20,289 INFO L430 AbstractCegarLoop]: === Iteration 532 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:11:20,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:11:20,289 INFO L82 PathProgramCache]: Analyzing trace with hash 815345346, now seen corresponding path program 317 times [2021-06-05 21:11:20,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:11:20,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414785259] [2021-06-05 21:11:20,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:11:20,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:11:20,376 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 82 proven. 95 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:11:20,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:11:20,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414785259] [2021-06-05 21:11:20,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414785259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:20,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872309633] [2021-06-05 21:11:20,376 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 524 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 524 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:11:20,408 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-05 21:11:20,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:11:20,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:11:20,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:11:20,517 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 84 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:11:20,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872309633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:20,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:11:20,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 16 [2021-06-05 21:11:20,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619411673] [2021-06-05 21:11:20,517 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:11:20,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:11:20,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:11:20,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:11:20,518 INFO L87 Difference]: Start difference. First operand 13345 states and 34633 transitions. Second operand has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 16 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:20,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:11:20,811 INFO L93 Difference]: Finished difference Result 16957 states and 41994 transitions. [2021-06-05 21:11:20,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:11:20,812 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 16 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:11:20,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:11:20,830 INFO L225 Difference]: With dead ends: 16957 [2021-06-05 21:11:20,830 INFO L226 Difference]: Without dead ends: 16957 [2021-06-05 21:11:20,830 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 138.6ms TimeCoverageRelationStatistics Valid=173, Invalid=289, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:11:20,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16957 states. [2021-06-05 21:11:21,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16957 to 13816. [2021-06-05 21:11:21,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13816 states, 13815 states have (on average 2.607889974665219) internal successors, (36028), 13815 states have internal predecessors, (36028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:21,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13816 states to 13816 states and 36028 transitions. [2021-06-05 21:11:21,035 INFO L78 Accepts]: Start accepts. Automaton has 13816 states and 36028 transitions. Word has length 59 [2021-06-05 21:11:21,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:11:21,035 INFO L482 AbstractCegarLoop]: Abstraction has 13816 states and 36028 transitions. [2021-06-05 21:11:21,035 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 16 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:21,035 INFO L276 IsEmpty]: Start isEmpty. Operand 13816 states and 36028 transitions. [2021-06-05 21:11:21,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:11:21,044 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:11:21,044 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:11:21,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 524 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1110 [2021-06-05 21:11:21,244 INFO L430 AbstractCegarLoop]: === Iteration 533 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:11:21,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:11:21,244 INFO L82 PathProgramCache]: Analyzing trace with hash -1926034251, now seen corresponding path program 157 times [2021-06-05 21:11:21,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:11:21,244 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126428948] [2021-06-05 21:11:21,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:11:21,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:11:21,369 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 167 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:11:21,369 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:11:21,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126428948] [2021-06-05 21:11:21,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126428948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:21,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892449507] [2021-06-05 21:11:21,369 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 525 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 525 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:11:21,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:11:21,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 21:11:21,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:11:21,480 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 167 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:11:21,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892449507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:21,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:11:21,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 21:11:21,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347926299] [2021-06-05 21:11:21,481 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:11:21,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:11:21,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:11:21,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:11:21,481 INFO L87 Difference]: Start difference. First operand 13816 states and 36028 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:22,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:11:22,149 INFO L93 Difference]: Finished difference Result 16406 states and 41478 transitions. [2021-06-05 21:11:22,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:11:22,150 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:11:22,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:11:22,166 INFO L225 Difference]: With dead ends: 16406 [2021-06-05 21:11:22,166 INFO L226 Difference]: Without dead ends: 16388 [2021-06-05 21:11:22,167 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 228.3ms TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:11:22,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16388 states. [2021-06-05 21:11:22,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16388 to 13495. [2021-06-05 21:11:22,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13495 states, 13494 states have (on average 2.6217578182896104) internal successors, (35378), 13494 states have internal predecessors, (35378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:22,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13495 states to 13495 states and 35378 transitions. [2021-06-05 21:11:22,351 INFO L78 Accepts]: Start accepts. Automaton has 13495 states and 35378 transitions. Word has length 59 [2021-06-05 21:11:22,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:11:22,351 INFO L482 AbstractCegarLoop]: Abstraction has 13495 states and 35378 transitions. [2021-06-05 21:11:22,351 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:22,351 INFO L276 IsEmpty]: Start isEmpty. Operand 13495 states and 35378 transitions. [2021-06-05 21:11:22,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:11:22,359 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:11:22,359 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:11:22,559 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 525 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1111 [2021-06-05 21:11:22,559 INFO L430 AbstractCegarLoop]: === Iteration 534 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:11:22,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:11:22,559 INFO L82 PathProgramCache]: Analyzing trace with hash -2102925195, now seen corresponding path program 318 times [2021-06-05 21:11:22,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:11:22,560 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832334341] [2021-06-05 21:11:22,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:11:22,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:11:22,667 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 18 proven. 157 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:11:22,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:11:22,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832334341] [2021-06-05 21:11:22,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832334341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:22,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179214375] [2021-06-05 21:11:22,668 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 526 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 526 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:11:22,700 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 21:11:22,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:11:22,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 21:11:22,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:11:22,845 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 160 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:11:22,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179214375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:22,845 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:11:22,845 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 15 [2021-06-05 21:11:22,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729039567] [2021-06-05 21:11:22,845 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:11:22,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:11:22,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:11:22,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:11:22,845 INFO L87 Difference]: Start difference. First operand 13495 states and 35378 transitions. Second operand has 16 states, 16 states have (on average 4.3125) internal successors, (69), 15 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:23,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:11:23,271 INFO L93 Difference]: Finished difference Result 13544 states and 35453 transitions. [2021-06-05 21:11:23,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:11:23,273 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.3125) internal successors, (69), 15 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:11:23,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:11:23,287 INFO L225 Difference]: With dead ends: 13544 [2021-06-05 21:11:23,287 INFO L226 Difference]: Without dead ends: 13512 [2021-06-05 21:11:23,287 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 138.2ms TimeCoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:11:23,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13512 states. [2021-06-05 21:11:23,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13512 to 13495. [2021-06-05 21:11:23,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13495 states, 13494 states have (on average 2.621313176226471) internal successors, (35372), 13494 states have internal predecessors, (35372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:23,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13495 states to 13495 states and 35372 transitions. [2021-06-05 21:11:23,447 INFO L78 Accepts]: Start accepts. Automaton has 13495 states and 35372 transitions. Word has length 59 [2021-06-05 21:11:23,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:11:23,447 INFO L482 AbstractCegarLoop]: Abstraction has 13495 states and 35372 transitions. [2021-06-05 21:11:23,447 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.3125) internal successors, (69), 15 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:23,447 INFO L276 IsEmpty]: Start isEmpty. Operand 13495 states and 35372 transitions. [2021-06-05 21:11:23,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:11:23,455 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:11:23,455 INFO L554 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:11:23,655 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 526 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1112 [2021-06-05 21:11:23,655 INFO L430 AbstractCegarLoop]: === Iteration 535 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:11:23,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:11:23,656 INFO L82 PathProgramCache]: Analyzing trace with hash 513630058, now seen corresponding path program 319 times [2021-06-05 21:11:23,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:11:23,656 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085466658] [2021-06-05 21:11:23,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:11:23,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:11:23,734 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 80 proven. 97 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:11:23,735 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:11:23,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085466658] [2021-06-05 21:11:23,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085466658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:23,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213021874] [2021-06-05 21:11:23,735 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 527 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 527 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:11:23,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:11:23,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:11:23,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:11:23,867 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 121 proven. 56 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:11:23,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213021874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:23,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:11:23,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-06-05 21:11:23,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764628907] [2021-06-05 21:11:23,868 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:11:23,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:11:23,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:11:23,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:11:23,868 INFO L87 Difference]: Start difference. First operand 13495 states and 35372 transitions. Second operand has 15 states, 15 states have (on average 4.4) internal successors, (66), 14 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:24,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:11:24,125 INFO L93 Difference]: Finished difference Result 16977 states and 42453 transitions. [2021-06-05 21:11:24,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:11:24,126 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.4) internal successors, (66), 14 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:11:24,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:11:24,146 INFO L225 Difference]: With dead ends: 16977 [2021-06-05 21:11:24,146 INFO L226 Difference]: Without dead ends: 16977 [2021-06-05 21:11:24,146 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 107.6ms TimeCoverageRelationStatistics Valid=128, Invalid=178, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:11:24,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16977 states. [2021-06-05 21:11:24,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16977 to 14002. [2021-06-05 21:11:24,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14002 states, 14001 states have (on average 2.633454753231912) internal successors, (36871), 14001 states have internal predecessors, (36871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:24,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14002 states to 14002 states and 36871 transitions. [2021-06-05 21:11:24,358 INFO L78 Accepts]: Start accepts. Automaton has 14002 states and 36871 transitions. Word has length 59 [2021-06-05 21:11:24,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:11:24,358 INFO L482 AbstractCegarLoop]: Abstraction has 14002 states and 36871 transitions. [2021-06-05 21:11:24,359 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.4) internal successors, (66), 14 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:24,359 INFO L276 IsEmpty]: Start isEmpty. Operand 14002 states and 36871 transitions. [2021-06-05 21:11:24,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:11:24,368 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:11:24,368 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:11:24,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 527 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1113 [2021-06-05 21:11:24,568 INFO L430 AbstractCegarLoop]: === Iteration 536 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:11:24,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:11:24,568 INFO L82 PathProgramCache]: Analyzing trace with hash -257205609, now seen corresponding path program 158 times [2021-06-05 21:11:24,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:11:24,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874005698] [2021-06-05 21:11:24,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:11:24,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:11:24,662 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 167 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:11:24,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:11:24,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874005698] [2021-06-05 21:11:24,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874005698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:24,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835696135] [2021-06-05 21:11:24,662 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 528 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 528 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:11:24,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:11:24,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:11:24,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 21:11:24,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:11:24,776 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 167 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:11:24,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835696135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:24,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:11:24,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:11:24,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469412799] [2021-06-05 21:11:24,777 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:11:24,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:11:24,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:11:24,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:11:24,777 INFO L87 Difference]: Start difference. First operand 14002 states and 36871 transitions. Second operand has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:25,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:11:25,344 INFO L93 Difference]: Finished difference Result 15466 states and 39872 transitions. [2021-06-05 21:11:25,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:11:25,344 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:11:25,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:11:25,362 INFO L225 Difference]: With dead ends: 15466 [2021-06-05 21:11:25,363 INFO L226 Difference]: Without dead ends: 15466 [2021-06-05 21:11:25,363 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 176.8ms TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:11:25,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15466 states. [2021-06-05 21:11:25,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15466 to 14020. [2021-06-05 21:11:25,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14020 states, 14019 states have (on average 2.6337113916827164) internal successors, (36922), 14019 states have internal predecessors, (36922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:25,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14020 states to 14020 states and 36922 transitions. [2021-06-05 21:11:25,560 INFO L78 Accepts]: Start accepts. Automaton has 14020 states and 36922 transitions. Word has length 59 [2021-06-05 21:11:25,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:11:25,560 INFO L482 AbstractCegarLoop]: Abstraction has 14020 states and 36922 transitions. [2021-06-05 21:11:25,560 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:25,560 INFO L276 IsEmpty]: Start isEmpty. Operand 14020 states and 36922 transitions. [2021-06-05 21:11:25,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:11:25,568 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:11:25,569 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:11:25,769 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 528 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1116 [2021-06-05 21:11:25,769 INFO L430 AbstractCegarLoop]: === Iteration 537 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:11:25,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:11:25,769 INFO L82 PathProgramCache]: Analyzing trace with hash -1890501993, now seen corresponding path program 320 times [2021-06-05 21:11:25,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:11:25,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002287340] [2021-06-05 21:11:25,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:11:25,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:11:25,876 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 18 proven. 157 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:11:25,876 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:11:25,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002287340] [2021-06-05 21:11:25,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002287340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:25,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907993206] [2021-06-05 21:11:25,877 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 529 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 529 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:11:25,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:11:25,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:11:25,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 21:11:25,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:11:26,024 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 160 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:11:26,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907993206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:26,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:11:26,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-05 21:11:26,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766565458] [2021-06-05 21:11:26,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:11:26,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:11:26,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:11:26,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:11:26,025 INFO L87 Difference]: Start difference. First operand 14020 states and 36922 transitions. Second operand has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:26,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:11:26,445 INFO L93 Difference]: Finished difference Result 14088 states and 37021 transitions. [2021-06-05 21:11:26,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:11:26,445 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:11:26,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:11:26,461 INFO L225 Difference]: With dead ends: 14088 [2021-06-05 21:11:26,461 INFO L226 Difference]: Without dead ends: 14068 [2021-06-05 21:11:26,461 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 121.4ms TimeCoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:11:26,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14068 states. [2021-06-05 21:11:26,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14068 to 14020. [2021-06-05 21:11:26,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14020 states, 14019 states have (on average 2.6334973963906125) internal successors, (36919), 14019 states have internal predecessors, (36919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:26,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14020 states to 14020 states and 36919 transitions. [2021-06-05 21:11:26,648 INFO L78 Accepts]: Start accepts. Automaton has 14020 states and 36919 transitions. Word has length 59 [2021-06-05 21:11:26,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:11:26,648 INFO L482 AbstractCegarLoop]: Abstraction has 14020 states and 36919 transitions. [2021-06-05 21:11:26,648 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) [2021-06-05 21:11:26,648 INFO L276 IsEmpty]: Start isEmpty. Operand 14020 states and 36919 transitions. [2021-06-05 21:11:26,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:11:26,656 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:11:26,656 INFO L554 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:11:26,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1117,529 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:11:26,857 INFO L430 AbstractCegarLoop]: === Iteration 538 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:11:26,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:11:26,857 INFO L82 PathProgramCache]: Analyzing trace with hash -336914294, now seen corresponding path program 159 times [2021-06-05 21:11:26,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:11:26,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504170237] [2021-06-05 21:11:26,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:11:26,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:11:26,936 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 77 proven. 100 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:11:26,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:11:26,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504170237] [2021-06-05 21:11:26,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504170237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:26,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119346575] [2021-06-05 21:11:26,937 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 530 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 530 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:11:26,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 21:11:26,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:11:26,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:11:26,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:11:27,058 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 78 proven. 100 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:11:27,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119346575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:27,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:11:27,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-06-05 21:11:27,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890560254] [2021-06-05 21:11:27,058 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:11:27,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:11:27,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:11:27,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:11:27,059 INFO L87 Difference]: Start difference. First operand 14020 states and 36919 transitions. Second operand has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 13 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:27,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:11:27,260 INFO L93 Difference]: Finished difference Result 15125 states and 39073 transitions. [2021-06-05 21:11:27,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:11:27,260 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 13 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:11:27,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:11:27,280 INFO L225 Difference]: With dead ends: 15125 [2021-06-05 21:11:27,280 INFO L226 Difference]: Without dead ends: 15103 [2021-06-05 21:11:27,280 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 94.8ms TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:11:27,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15103 states. [2021-06-05 21:11:27,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15103 to 13957. [2021-06-05 21:11:27,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13957 states, 13956 states have (on average 2.635640584694755) internal successors, (36783), 13956 states have internal predecessors, (36783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:27,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13957 states to 13957 states and 36783 transitions. [2021-06-05 21:11:27,477 INFO L78 Accepts]: Start accepts. Automaton has 13957 states and 36783 transitions. Word has length 59 [2021-06-05 21:11:27,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:11:27,477 INFO L482 AbstractCegarLoop]: Abstraction has 13957 states and 36783 transitions. [2021-06-05 21:11:27,477 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 13 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:27,477 INFO L276 IsEmpty]: Start isEmpty. Operand 13957 states and 36783 transitions. [2021-06-05 21:11:27,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:11:27,486 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:11:27,486 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:11:27,686 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1118,530 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:11:27,686 INFO L430 AbstractCegarLoop]: === Iteration 539 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:11:27,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:11:27,686 INFO L82 PathProgramCache]: Analyzing trace with hash 1535027189, now seen corresponding path program 160 times [2021-06-05 21:11:27,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:11:27,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168218185] [2021-06-05 21:11:27,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:11:27,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:11:27,781 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 167 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:11:27,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:11:27,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168218185] [2021-06-05 21:11:27,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168218185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:27,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420679117] [2021-06-05 21:11:27,781 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 531 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 531 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:11:27,810 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:11:27,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:11:27,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 21:11:27,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:11:27,897 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 167 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:11:27,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420679117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:27,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:11:27,898 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 21:11:27,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375903216] [2021-06-05 21:11:27,898 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:11:27,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:11:27,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:11:27,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:11:27,898 INFO L87 Difference]: Start difference. First operand 13957 states and 36783 transitions. Second operand has 12 states, 12 states have (on average 5.0) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:28,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:11:28,448 INFO L93 Difference]: Finished difference Result 14854 states and 38533 transitions. [2021-06-05 21:11:28,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:11:28,448 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:11:28,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:11:28,467 INFO L225 Difference]: With dead ends: 14854 [2021-06-05 21:11:28,467 INFO L226 Difference]: Without dead ends: 14846 [2021-06-05 21:11:28,467 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 147.6ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:11:28,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14846 states. [2021-06-05 21:11:28,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14846 to 14042. [2021-06-05 21:11:28,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14042 states, 14041 states have (on average 2.6336443273271133) internal successors, (36979), 14041 states have internal predecessors, (36979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:28,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14042 states to 14042 states and 36979 transitions. [2021-06-05 21:11:28,654 INFO L78 Accepts]: Start accepts. Automaton has 14042 states and 36979 transitions. Word has length 59 [2021-06-05 21:11:28,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:11:28,654 INFO L482 AbstractCegarLoop]: Abstraction has 14042 states and 36979 transitions. [2021-06-05 21:11:28,654 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:28,654 INFO L276 IsEmpty]: Start isEmpty. Operand 14042 states and 36979 transitions. [2021-06-05 21:11:28,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:11:28,662 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:11:28,662 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:11:28,863 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 531 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1122 [2021-06-05 21:11:28,863 INFO L430 AbstractCegarLoop]: === Iteration 540 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:11:28,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:11:28,863 INFO L82 PathProgramCache]: Analyzing trace with hash -1259607115, now seen corresponding path program 321 times [2021-06-05 21:11:28,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:11:28,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585865084] [2021-06-05 21:11:28,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:11:28,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:11:28,948 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 19 proven. 156 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:11:28,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:11:28,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585865084] [2021-06-05 21:11:28,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585865084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:28,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597005467] [2021-06-05 21:11:28,948 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 532 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 532 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:11:28,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 21:11:28,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:11:28,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 21:11:28,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:11:29,090 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 160 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:11:29,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597005467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:29,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:11:29,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 21:11:29,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354404307] [2021-06-05 21:11:29,090 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:11:29,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:11:29,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:11:29,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:11:29,091 INFO L87 Difference]: Start difference. First operand 14042 states and 36979 transitions. Second operand has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 11 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:29,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:11:29,773 INFO L93 Difference]: Finished difference Result 14554 states and 37840 transitions. [2021-06-05 21:11:29,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:11:29,774 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 11 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:11:29,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:11:29,790 INFO L225 Difference]: With dead ends: 14554 [2021-06-05 21:11:29,790 INFO L226 Difference]: Without dead ends: 14403 [2021-06-05 21:11:29,790 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 146.1ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:11:29,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14403 states. [2021-06-05 21:11:29,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14403 to 13894. [2021-06-05 21:11:29,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13894 states, 13893 states have (on average 2.636723529835169) internal successors, (36632), 13893 states have internal predecessors, (36632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:29,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13894 states to 13894 states and 36632 transitions. [2021-06-05 21:11:29,982 INFO L78 Accepts]: Start accepts. Automaton has 13894 states and 36632 transitions. Word has length 59 [2021-06-05 21:11:29,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:11:29,982 INFO L482 AbstractCegarLoop]: Abstraction has 13894 states and 36632 transitions. [2021-06-05 21:11:29,982 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 11 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:29,982 INFO L276 IsEmpty]: Start isEmpty. Operand 13894 states and 36632 transitions. [2021-06-05 21:11:29,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:11:29,990 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:11:29,990 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:11:30,190 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 532 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1123 [2021-06-05 21:11:30,190 INFO L430 AbstractCegarLoop]: === Iteration 541 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:11:30,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:11:30,190 INFO L82 PathProgramCache]: Analyzing trace with hash -1873143295, now seen corresponding path program 322 times [2021-06-05 21:11:30,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:11:30,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969281628] [2021-06-05 21:11:30,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:11:30,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:11:30,283 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:11:30,284 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:11:30,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969281628] [2021-06-05 21:11:30,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969281628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:30,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893129562] [2021-06-05 21:11:30,284 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 533 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 533 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:11:30,313 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:11:30,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:11:30,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 21:11:30,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:11:30,398 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:11:30,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893129562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:30,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:11:30,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 21:11:30,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909088930] [2021-06-05 21:11:30,399 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:11:30,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:11:30,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:11:30,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:11:30,399 INFO L87 Difference]: Start difference. First operand 13894 states and 36632 transitions. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:30,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:11:30,905 INFO L93 Difference]: Finished difference Result 14649 states and 38103 transitions. [2021-06-05 21:11:30,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:11:30,905 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:11:30,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:11:30,921 INFO L225 Difference]: With dead ends: 14649 [2021-06-05 21:11:30,921 INFO L226 Difference]: Without dead ends: 14637 [2021-06-05 21:11:30,921 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 146.8ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:11:30,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14637 states. [2021-06-05 21:11:31,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14637 to 13896. [2021-06-05 21:11:31,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13896 states, 13895 states have (on average 2.6366318819719323) internal successors, (36636), 13895 states have internal predecessors, (36636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:31,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13896 states to 13896 states and 36636 transitions. [2021-06-05 21:11:31,105 INFO L78 Accepts]: Start accepts. Automaton has 13896 states and 36636 transitions. Word has length 59 [2021-06-05 21:11:31,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:11:31,105 INFO L482 AbstractCegarLoop]: Abstraction has 13896 states and 36636 transitions. [2021-06-05 21:11:31,105 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:31,105 INFO L276 IsEmpty]: Start isEmpty. Operand 13896 states and 36636 transitions. [2021-06-05 21:11:31,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:11:31,113 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:11:31,113 INFO L554 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:11:31,313 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 533 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1124 [2021-06-05 21:11:31,313 INFO L430 AbstractCegarLoop]: === Iteration 542 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:11:31,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:11:31,314 INFO L82 PathProgramCache]: Analyzing trace with hash 773466498, now seen corresponding path program 323 times [2021-06-05 21:11:31,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:11:31,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79973898] [2021-06-05 21:11:31,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:11:31,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:11:31,386 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 75 proven. 103 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:11:31,386 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:11:31,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79973898] [2021-06-05 21:11:31,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79973898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:31,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873332170] [2021-06-05 21:11:31,386 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 534 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 534 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:11:31,417 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 21:11:31,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:11:31,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:11:31,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:11:31,520 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 76 proven. 103 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:11:31,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873332170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:31,521 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:11:31,521 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 14 [2021-06-05 21:11:31,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900499886] [2021-06-05 21:11:31,521 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:11:31,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:11:31,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:11:31,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:11:31,521 INFO L87 Difference]: Start difference. First operand 13896 states and 36636 transitions. Second operand has 15 states, 15 states have (on average 4.733333333333333) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:31,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:11:31,735 INFO L93 Difference]: Finished difference Result 16479 states and 41384 transitions. [2021-06-05 21:11:31,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:11:31,735 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.733333333333333) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:11:31,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:11:31,754 INFO L225 Difference]: With dead ends: 16479 [2021-06-05 21:11:31,755 INFO L226 Difference]: Without dead ends: 16473 [2021-06-05 21:11:31,755 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 89.1ms TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:11:31,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16473 states. [2021-06-05 21:11:31,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16473 to 13895. [2021-06-05 21:11:31,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13895 states, 13894 states have (on average 2.6363178350367065) internal successors, (36629), 13894 states have internal predecessors, (36629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:31,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13895 states to 13895 states and 36629 transitions. [2021-06-05 21:11:31,951 INFO L78 Accepts]: Start accepts. Automaton has 13895 states and 36629 transitions. Word has length 59 [2021-06-05 21:11:31,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:11:31,951 INFO L482 AbstractCegarLoop]: Abstraction has 13895 states and 36629 transitions. [2021-06-05 21:11:31,952 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.733333333333333) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:31,952 INFO L276 IsEmpty]: Start isEmpty. Operand 13895 states and 36629 transitions. [2021-06-05 21:11:31,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:11:31,959 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:11:31,959 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:11:32,159 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1125,534 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:11:32,160 INFO L430 AbstractCegarLoop]: === Iteration 543 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:11:32,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:11:32,160 INFO L82 PathProgramCache]: Analyzing trace with hash 268774039, now seen corresponding path program 324 times [2021-06-05 21:11:32,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:11:32,160 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499015315] [2021-06-05 21:11:32,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:11:32,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:11:32,252 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 158 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:11:32,252 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:11:32,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499015315] [2021-06-05 21:11:32,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499015315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:32,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697875547] [2021-06-05 21:11:32,252 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 535 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 535 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:11:32,283 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-05 21:11:32,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:11:32,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 21:11:32,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:11:32,368 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 159 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:11:32,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697875547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:32,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:11:32,369 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:11:32,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716934773] [2021-06-05 21:11:32,369 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:11:32,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:11:32,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:11:32,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:11:32,369 INFO L87 Difference]: Start difference. First operand 13895 states and 36629 transitions. Second operand has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:33,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:11:33,130 INFO L93 Difference]: Finished difference Result 16130 states and 41196 transitions. [2021-06-05 21:11:33,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 21:11:33,131 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:11:33,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:11:33,148 INFO L225 Difference]: With dead ends: 16130 [2021-06-05 21:11:33,148 INFO L226 Difference]: Without dead ends: 16076 [2021-06-05 21:11:33,149 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 288.1ms TimeCoverageRelationStatistics Valid=141, Invalid=1049, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 21:11:33,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16076 states. [2021-06-05 21:11:33,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16076 to 14050. [2021-06-05 21:11:33,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14050 states, 14049 states have (on average 2.6358459676845327) internal successors, (37031), 14049 states have internal predecessors, (37031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:33,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14050 states to 14050 states and 37031 transitions. [2021-06-05 21:11:33,357 INFO L78 Accepts]: Start accepts. Automaton has 14050 states and 37031 transitions. Word has length 59 [2021-06-05 21:11:33,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:11:33,357 INFO L482 AbstractCegarLoop]: Abstraction has 14050 states and 37031 transitions. [2021-06-05 21:11:33,357 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:33,357 INFO L276 IsEmpty]: Start isEmpty. Operand 14050 states and 37031 transitions. [2021-06-05 21:11:33,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:11:33,365 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:11:33,365 INFO L554 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:11:33,565 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 535 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1128 [2021-06-05 21:11:33,566 INFO L430 AbstractCegarLoop]: === Iteration 544 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:11:33,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:11:33,566 INFO L82 PathProgramCache]: Analyzing trace with hash 1801333148, now seen corresponding path program 325 times [2021-06-05 21:11:33,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:11:33,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353204921] [2021-06-05 21:11:33,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:11:33,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:11:33,650 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 69 proven. 109 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:11:33,651 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:11:33,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353204921] [2021-06-05 21:11:33,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353204921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:33,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299952439] [2021-06-05 21:11:33,651 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 536 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 536 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:11:33,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:11:33,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:11:33,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:11:33,763 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 69 proven. 109 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:11:33,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299952439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:33,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:11:33,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-05 21:11:33,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98076490] [2021-06-05 21:11:33,763 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:11:33,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:11:33,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:11:33,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:11:33,763 INFO L87 Difference]: Start difference. First operand 14050 states and 37031 transitions. Second operand has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:33,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:11:33,943 INFO L93 Difference]: Finished difference Result 16536 states and 41568 transitions. [2021-06-05 21:11:33,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:11:33,943 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:11:33,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:11:33,963 INFO L225 Difference]: With dead ends: 16536 [2021-06-05 21:11:33,963 INFO L226 Difference]: Without dead ends: 16518 [2021-06-05 21:11:33,963 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 86.8ms TimeCoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:11:33,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16518 states. [2021-06-05 21:11:34,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16518 to 14050. [2021-06-05 21:11:34,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14050 states, 14049 states have (on average 2.6353477115808954) internal successors, (37024), 14049 states have internal predecessors, (37024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:34,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14050 states to 14050 states and 37024 transitions. [2021-06-05 21:11:34,173 INFO L78 Accepts]: Start accepts. Automaton has 14050 states and 37024 transitions. Word has length 59 [2021-06-05 21:11:34,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:11:34,173 INFO L482 AbstractCegarLoop]: Abstraction has 14050 states and 37024 transitions. [2021-06-05 21:11:34,173 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:34,173 INFO L276 IsEmpty]: Start isEmpty. Operand 14050 states and 37024 transitions. [2021-06-05 21:11:34,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:11:34,183 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:11:34,183 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:11:34,383 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 536 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1129 [2021-06-05 21:11:34,383 INFO L430 AbstractCegarLoop]: === Iteration 545 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:11:34,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:11:34,383 INFO L82 PathProgramCache]: Analyzing trace with hash 423610573, now seen corresponding path program 326 times [2021-06-05 21:11:34,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:11:34,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142429857] [2021-06-05 21:11:34,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:11:34,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:11:34,488 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 158 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:11:34,488 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:11:34,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142429857] [2021-06-05 21:11:34,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142429857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:34,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639306874] [2021-06-05 21:11:34,488 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 537 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 537 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:11:34,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:11:34,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:11:34,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 21:11:34,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:11:34,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:11:34,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2021-06-05 21:11:34,634 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:11:34,635 INFO L628 ElimStorePlain]: treesize reduction 20, result has 4.8 percent of original size [2021-06-05 21:11:34,635 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-06-05 21:11:34,636 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:11:34,636 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:1 [2021-06-05 21:11:34,642 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 20 proven. 155 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:11:34,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639306874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:34,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:11:34,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 16 [2021-06-05 21:11:34,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059462699] [2021-06-05 21:11:34,643 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:11:34,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:11:34,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:11:34,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:11:34,643 INFO L87 Difference]: Start difference. First operand 14050 states and 37024 transitions. Second operand has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 16 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:35,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:11:35,986 INFO L93 Difference]: Finished difference Result 19628 states and 48599 transitions. [2021-06-05 21:11:35,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 21:11:35,986 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 16 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:11:35,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:11:36,010 INFO L225 Difference]: With dead ends: 19628 [2021-06-05 21:11:36,010 INFO L226 Difference]: Without dead ends: 19460 [2021-06-05 21:11:36,010 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1220 ImplicationChecksByTransitivity, 647.9ms TimeCoverageRelationStatistics Valid=375, Invalid=3531, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 21:11:36,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19460 states. [2021-06-05 21:11:36,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19460 to 14519. [2021-06-05 21:11:36,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14519 states, 14518 states have (on average 2.627910180465629) internal successors, (38152), 14518 states have internal predecessors, (38152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:36,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14519 states to 14519 states and 38152 transitions. [2021-06-05 21:11:36,253 INFO L78 Accepts]: Start accepts. Automaton has 14519 states and 38152 transitions. Word has length 59 [2021-06-05 21:11:36,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:11:36,253 INFO L482 AbstractCegarLoop]: Abstraction has 14519 states and 38152 transitions. [2021-06-05 21:11:36,253 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 16 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:36,253 INFO L276 IsEmpty]: Start isEmpty. Operand 14519 states and 38152 transitions. [2021-06-05 21:11:36,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:11:36,262 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:11:36,262 INFO L554 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:11:36,462 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 537 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1133 [2021-06-05 21:11:36,462 INFO L430 AbstractCegarLoop]: === Iteration 546 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:11:36,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:11:36,462 INFO L82 PathProgramCache]: Analyzing trace with hash 810213250, now seen corresponding path program 327 times [2021-06-05 21:11:36,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:11:36,463 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872306459] [2021-06-05 21:11:36,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:11:36,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:11:36,556 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 58 proven. 120 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:11:36,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:11:36,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872306459] [2021-06-05 21:11:36,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872306459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:36,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876415808] [2021-06-05 21:11:36,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 538 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 538 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:11:36,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 21:11:36,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:11:36,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:11:36,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:11:36,673 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 58 proven. 120 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:11:36,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876415808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:36,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:11:36,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-06-05 21:11:36,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015712421] [2021-06-05 21:11:36,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:11:36,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:11:36,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:11:36,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:11:36,674 INFO L87 Difference]: Start difference. First operand 14519 states and 38152 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:36,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:11:36,866 INFO L93 Difference]: Finished difference Result 17127 states and 42923 transitions. [2021-06-05 21:11:36,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:11:36,867 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:11:36,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:11:36,887 INFO L225 Difference]: With dead ends: 17127 [2021-06-05 21:11:36,887 INFO L226 Difference]: Without dead ends: 17100 [2021-06-05 21:11:36,887 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 103.5ms TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:11:36,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17100 states. [2021-06-05 21:11:37,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17100 to 14519. [2021-06-05 21:11:37,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14519 states, 14518 states have (on average 2.6277035404325666) internal successors, (38149), 14518 states have internal predecessors, (38149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:37,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14519 states to 14519 states and 38149 transitions. [2021-06-05 21:11:37,104 INFO L78 Accepts]: Start accepts. Automaton has 14519 states and 38149 transitions. Word has length 59 [2021-06-05 21:11:37,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:11:37,104 INFO L482 AbstractCegarLoop]: Abstraction has 14519 states and 38149 transitions. [2021-06-05 21:11:37,104 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:37,104 INFO L276 IsEmpty]: Start isEmpty. Operand 14519 states and 38149 transitions. [2021-06-05 21:11:37,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:11:37,113 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:11:37,113 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:11:37,313 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 538 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1134 [2021-06-05 21:11:37,313 INFO L430 AbstractCegarLoop]: === Iteration 547 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:11:37,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:11:37,313 INFO L82 PathProgramCache]: Analyzing trace with hash 363919063, now seen corresponding path program 328 times [2021-06-05 21:11:37,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:11:37,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276940036] [2021-06-05 21:11:37,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:11:37,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:11:37,425 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 158 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:11:37,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:11:37,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276940036] [2021-06-05 21:11:37,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276940036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:37,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820987248] [2021-06-05 21:11:37,425 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 539 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 539 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:11:37,454 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:11:37,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:11:37,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 21:11:37,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:11:37,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:11:37,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2021-06-05 21:11:37,590 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:11:37,591 INFO L628 ElimStorePlain]: treesize reduction 20, result has 4.8 percent of original size [2021-06-05 21:11:37,591 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-06-05 21:11:37,592 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:11:37,592 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:1 [2021-06-05 21:11:37,598 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 20 proven. 155 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:11:37,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820987248] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:37,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:11:37,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-06-05 21:11:37,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354725670] [2021-06-05 21:11:37,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:11:37,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:11:37,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:11:37,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:11:37,599 INFO L87 Difference]: Start difference. First operand 14519 states and 38149 transitions. Second operand has 19 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 18 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:40,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:11:40,007 INFO L93 Difference]: Finished difference Result 27358 states and 65118 transitions. [2021-06-05 21:11:40,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2021-06-05 21:11:40,008 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 18 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:11:40,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:11:40,039 INFO L225 Difference]: With dead ends: 27358 [2021-06-05 21:11:40,039 INFO L226 Difference]: Without dead ends: 26914 [2021-06-05 21:11:40,040 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4638 ImplicationChecksByTransitivity, 1290.1ms TimeCoverageRelationStatistics Valid=969, Invalid=11241, Unknown=0, NotChecked=0, Total=12210 [2021-06-05 21:11:40,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26914 states. [2021-06-05 21:11:40,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26914 to 15487. [2021-06-05 21:11:40,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15487 states, 15486 states have (on average 2.61139093374661) internal successors, (40440), 15486 states have internal predecessors, (40440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:40,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15487 states to 15487 states and 40440 transitions. [2021-06-05 21:11:40,302 INFO L78 Accepts]: Start accepts. Automaton has 15487 states and 40440 transitions. Word has length 59 [2021-06-05 21:11:40,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:11:40,303 INFO L482 AbstractCegarLoop]: Abstraction has 15487 states and 40440 transitions. [2021-06-05 21:11:40,303 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 18 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:40,303 INFO L276 IsEmpty]: Start isEmpty. Operand 15487 states and 40440 transitions. [2021-06-05 21:11:40,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:11:40,311 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:11:40,311 INFO L554 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:11:40,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1139,539 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:11:40,512 INFO L430 AbstractCegarLoop]: === Iteration 548 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:11:40,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:11:40,512 INFO L82 PathProgramCache]: Analyzing trace with hash -2037475364, now seen corresponding path program 329 times [2021-06-05 21:11:40,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:11:40,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86773756] [2021-06-05 21:11:40,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:11:40,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:11:40,616 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 53 proven. 125 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:11:40,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:11:40,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86773756] [2021-06-05 21:11:40,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86773756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:40,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008107767] [2021-06-05 21:11:40,617 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 540 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 540 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:11:40,648 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 21:11:40,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:11:40,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:11:40,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:11:40,759 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 53 proven. 125 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:11:40,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008107767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:40,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:11:40,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 17 [2021-06-05 21:11:40,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234385713] [2021-06-05 21:11:40,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:11:40,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:11:40,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:11:40,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:11:40,760 INFO L87 Difference]: Start difference. First operand 15487 states and 40440 transitions. Second operand has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 17 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:41,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:11:41,070 INFO L93 Difference]: Finished difference Result 18492 states and 46004 transitions. [2021-06-05 21:11:41,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:11:41,070 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 17 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:11:41,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:11:41,090 INFO L225 Difference]: With dead ends: 18492 [2021-06-05 21:11:41,091 INFO L226 Difference]: Without dead ends: 18456 [2021-06-05 21:11:41,091 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 151.6ms TimeCoverageRelationStatistics Valid=136, Invalid=326, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:11:41,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18456 states. [2021-06-05 21:11:41,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18456 to 15487. [2021-06-05 21:11:41,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15487 states, 15486 states have (on average 2.611197210383572) internal successors, (40437), 15486 states have internal predecessors, (40437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:41,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15487 states to 15487 states and 40437 transitions. [2021-06-05 21:11:41,316 INFO L78 Accepts]: Start accepts. Automaton has 15487 states and 40437 transitions. Word has length 59 [2021-06-05 21:11:41,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:11:41,316 INFO L482 AbstractCegarLoop]: Abstraction has 15487 states and 40437 transitions. [2021-06-05 21:11:41,316 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 17 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:41,316 INFO L276 IsEmpty]: Start isEmpty. Operand 15487 states and 40437 transitions. [2021-06-05 21:11:41,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:11:41,324 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:11:41,324 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:11:41,525 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1140,540 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:11:41,525 INFO L430 AbstractCegarLoop]: === Iteration 549 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:11:41,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:11:41,525 INFO L82 PathProgramCache]: Analyzing trace with hash 210605197, now seen corresponding path program 330 times [2021-06-05 21:11:41,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:11:41,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384929183] [2021-06-05 21:11:41,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:11:41,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:11:41,648 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 158 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:11:41,648 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:11:41,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384929183] [2021-06-05 21:11:41,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384929183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:41,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432230961] [2021-06-05 21:11:41,648 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 541 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 541 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:11:41,679 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-05 21:11:41,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:11:41,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 21:11:41,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:11:41,760 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 159 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:11:41,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432230961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:41,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:11:41,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 21:11:41,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069388711] [2021-06-05 21:11:41,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:11:41,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:11:41,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:11:41,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:11:41,760 INFO L87 Difference]: Start difference. First operand 15487 states and 40437 transitions. Second operand has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:45,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:11:45,492 INFO L93 Difference]: Finished difference Result 44514 states and 101971 transitions. [2021-06-05 21:11:45,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 191 states. [2021-06-05 21:11:45,492 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:11:45,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:11:45,543 INFO L225 Difference]: With dead ends: 44514 [2021-06-05 21:11:45,543 INFO L226 Difference]: Without dead ends: 43374 [2021-06-05 21:11:45,544 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15415 ImplicationChecksByTransitivity, 2621.1ms TimeCoverageRelationStatistics Valid=2427, Invalid=33863, Unknown=0, NotChecked=0, Total=36290 [2021-06-05 21:11:45,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43374 states. [2021-06-05 21:11:45,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43374 to 17204. [2021-06-05 21:11:45,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17204 states, 17203 states have (on average 2.5862349590187756) internal successors, (44491), 17203 states have internal predecessors, (44491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:45,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17204 states to 17204 states and 44491 transitions. [2021-06-05 21:11:45,914 INFO L78 Accepts]: Start accepts. Automaton has 17204 states and 44491 transitions. Word has length 59 [2021-06-05 21:11:45,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:11:45,914 INFO L482 AbstractCegarLoop]: Abstraction has 17204 states and 44491 transitions. [2021-06-05 21:11:45,914 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:45,914 INFO L276 IsEmpty]: Start isEmpty. Operand 17204 states and 44491 transitions. [2021-06-05 21:11:45,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:11:45,924 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:11:45,924 INFO L554 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:11:46,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 541 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1146 [2021-06-05 21:11:46,124 INFO L430 AbstractCegarLoop]: === Iteration 550 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:11:46,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:11:46,124 INFO L82 PathProgramCache]: Analyzing trace with hash 960022850, now seen corresponding path program 331 times [2021-06-05 21:11:46,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:11:46,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290952753] [2021-06-05 21:11:46,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:11:46,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:11:46,237 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 54 proven. 124 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:11:46,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:11:46,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290952753] [2021-06-05 21:11:46,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290952753] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:46,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489205697] [2021-06-05 21:11:46,237 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 542 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 542 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:11:46,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:11:46,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:11:46,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:11:46,351 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 54 proven. 124 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:11:46,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489205697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:46,352 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:11:46,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-06-05 21:11:46,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754933575] [2021-06-05 21:11:46,352 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:11:46,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:11:46,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:11:46,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:11:46,352 INFO L87 Difference]: Start difference. First operand 17204 states and 44491 transitions. Second operand has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:46,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:11:46,609 INFO L93 Difference]: Finished difference Result 20471 states and 50544 transitions. [2021-06-05 21:11:46,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:11:46,609 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:11:46,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:11:46,631 INFO L225 Difference]: With dead ends: 20471 [2021-06-05 21:11:46,631 INFO L226 Difference]: Without dead ends: 20426 [2021-06-05 21:11:46,631 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 143.3ms TimeCoverageRelationStatistics Valid=137, Invalid=283, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:11:46,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20426 states. [2021-06-05 21:11:46,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20426 to 17204. [2021-06-05 21:11:46,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17204 states, 17203 states have (on average 2.586060570830669) internal successors, (44488), 17203 states have internal predecessors, (44488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:46,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17204 states to 17204 states and 44488 transitions. [2021-06-05 21:11:46,880 INFO L78 Accepts]: Start accepts. Automaton has 17204 states and 44488 transitions. Word has length 59 [2021-06-05 21:11:46,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:11:46,880 INFO L482 AbstractCegarLoop]: Abstraction has 17204 states and 44488 transitions. [2021-06-05 21:11:46,880 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:46,880 INFO L276 IsEmpty]: Start isEmpty. Operand 17204 states and 44488 transitions. [2021-06-05 21:11:46,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:11:46,889 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:11:46,889 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:11:47,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1147,542 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:11:47,090 INFO L430 AbstractCegarLoop]: === Iteration 551 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:11:47,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:11:47,090 INFO L82 PathProgramCache]: Analyzing trace with hash -1612541161, now seen corresponding path program 332 times [2021-06-05 21:11:47,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:11:47,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605539477] [2021-06-05 21:11:47,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:11:47,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:11:47,228 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 158 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:11:47,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:11:47,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605539477] [2021-06-05 21:11:47,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605539477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:47,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573379276] [2021-06-05 21:11:47,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 543 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 543 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:11:47,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:11:47,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:11:47,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 21:11:47,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:11:47,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:11:47,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2021-06-05 21:11:47,440 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:11:47,442 INFO L628 ElimStorePlain]: treesize reduction 20, result has 4.8 percent of original size [2021-06-05 21:11:47,442 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-06-05 21:11:47,442 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:11:47,442 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:1 [2021-06-05 21:11:47,449 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 20 proven. 155 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:11:47,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573379276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:47,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:11:47,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 22 [2021-06-05 21:11:47,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642850225] [2021-06-05 21:11:47,449 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 21:11:47,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:11:47,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 21:11:47,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:11:47,450 INFO L87 Difference]: Start difference. First operand 17204 states and 44488 transitions. Second operand has 23 states, 23 states have (on average 3.217391304347826) internal successors, (74), 22 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:54,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:11:54,406 INFO L93 Difference]: Finished difference Result 88879 states and 197085 transitions. [2021-06-05 21:11:54,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 319 states. [2021-06-05 21:11:54,406 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.217391304347826) internal successors, (74), 22 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:11:54,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:11:54,508 INFO L225 Difference]: With dead ends: 88879 [2021-06-05 21:11:54,508 INFO L226 Difference]: Without dead ends: 85405 [2021-06-05 21:11:54,636 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 317 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45804 ImplicationChecksByTransitivity, 5468.9ms TimeCoverageRelationStatistics Valid=5829, Invalid=95613, Unknown=0, NotChecked=0, Total=101442 [2021-06-05 21:11:54,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85405 states. [2021-06-05 21:11:55,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85405 to 19930. [2021-06-05 21:11:55,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19930 states, 19929 states have (on average 2.5569270911736663) internal successors, (50957), 19929 states have internal predecessors, (50957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:55,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19930 states to 19930 states and 50957 transitions. [2021-06-05 21:11:55,163 INFO L78 Accepts]: Start accepts. Automaton has 19930 states and 50957 transitions. Word has length 59 [2021-06-05 21:11:55,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:11:55,164 INFO L482 AbstractCegarLoop]: Abstraction has 19930 states and 50957 transitions. [2021-06-05 21:11:55,164 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.217391304347826) internal successors, (74), 22 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:55,164 INFO L276 IsEmpty]: Start isEmpty. Operand 19930 states and 50957 transitions. [2021-06-05 21:11:55,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:11:55,174 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:11:55,174 INFO L554 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:11:55,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 543 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1154 [2021-06-05 21:11:55,377 INFO L430 AbstractCegarLoop]: === Iteration 552 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:11:55,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:11:55,377 INFO L82 PathProgramCache]: Analyzing trace with hash -1530702308, now seen corresponding path program 333 times [2021-06-05 21:11:55,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:11:55,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087278354] [2021-06-05 21:11:55,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:11:55,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:11:55,505 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 61 proven. 117 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:11:55,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:11:55,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087278354] [2021-06-05 21:11:55,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087278354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:55,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903118396] [2021-06-05 21:11:55,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 544 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 544 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:11:55,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 21:11:55,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:11:55,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:11:55,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:11:55,622 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 61 proven. 117 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:11:55,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903118396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:55,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:11:55,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2021-06-05 21:11:55,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817294936] [2021-06-05 21:11:55,622 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:11:55,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:11:55,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:11:55,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:11:55,623 INFO L87 Difference]: Start difference. First operand 19930 states and 50957 transitions. Second operand has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:55,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:11:55,920 INFO L93 Difference]: Finished difference Result 23966 states and 58492 transitions. [2021-06-05 21:11:55,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:11:55,920 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:11:55,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:11:55,948 INFO L225 Difference]: With dead ends: 23966 [2021-06-05 21:11:55,949 INFO L226 Difference]: Without dead ends: 23912 [2021-06-05 21:11:55,949 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 168.5ms TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:11:55,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23912 states. [2021-06-05 21:11:56,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23912 to 19930. [2021-06-05 21:11:56,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19930 states, 19929 states have (on average 2.5567765567765566) internal successors, (50954), 19929 states have internal predecessors, (50954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:56,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19930 states to 19930 states and 50954 transitions. [2021-06-05 21:11:56,256 INFO L78 Accepts]: Start accepts. Automaton has 19930 states and 50954 transitions. Word has length 59 [2021-06-05 21:11:56,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:11:56,257 INFO L482 AbstractCegarLoop]: Abstraction has 19930 states and 50954 transitions. [2021-06-05 21:11:56,257 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:56,257 INFO L276 IsEmpty]: Start isEmpty. Operand 19930 states and 50954 transitions. [2021-06-05 21:11:56,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:11:56,267 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:11:56,267 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:11:56,467 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 544 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1155 [2021-06-05 21:11:56,467 INFO L430 AbstractCegarLoop]: === Iteration 553 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:11:56,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:11:56,467 INFO L82 PathProgramCache]: Analyzing trace with hash -809267123, now seen corresponding path program 334 times [2021-06-05 21:11:56,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:11:56,467 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084815020] [2021-06-05 21:11:56,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:11:56,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:11:56,618 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 158 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:11:56,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:11:56,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084815020] [2021-06-05 21:11:56,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084815020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:56,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677229319] [2021-06-05 21:11:56,618 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 545 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 545 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:11:56,646 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:11:56,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:11:56,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 21:11:56,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:11:56,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:11:56,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2021-06-05 21:11:56,854 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:11:56,856 INFO L628 ElimStorePlain]: treesize reduction 20, result has 4.8 percent of original size [2021-06-05 21:11:56,856 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-06-05 21:11:56,856 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:11:56,856 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:1 [2021-06-05 21:11:56,863 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 20 proven. 155 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:11:56,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677229319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:56,863 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:11:56,863 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 24 [2021-06-05 21:11:56,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136827432] [2021-06-05 21:11:56,863 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:11:56,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:11:56,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:11:56,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:11:56,864 INFO L87 Difference]: Start difference. First operand 19930 states and 50954 transitions. Second operand has 25 states, 25 states have (on average 3.08) internal successors, (77), 24 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:09,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:12:09,216 INFO L93 Difference]: Finished difference Result 96650 states and 218441 transitions. [2021-06-05 21:12:09,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 511 states. [2021-06-05 21:12:09,216 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.08) internal successors, (77), 24 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:12:09,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:12:09,340 INFO L225 Difference]: With dead ends: 96650 [2021-06-05 21:12:09,340 INFO L226 Difference]: Without dead ends: 93908 [2021-06-05 21:12:09,356 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 562 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 509 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122443 ImplicationChecksByTransitivity, 10512.0ms TimeCoverageRelationStatistics Valid=13119, Invalid=247491, Unknown=0, NotChecked=0, Total=260610 [2021-06-05 21:12:09,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93908 states. [2021-06-05 21:12:10,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93908 to 23705. [2021-06-05 21:12:10,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23705 states, 23704 states have (on average 2.5331589605129934) internal successors, (60046), 23704 states have internal predecessors, (60046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:10,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23705 states to 23705 states and 60046 transitions. [2021-06-05 21:12:10,170 INFO L78 Accepts]: Start accepts. Automaton has 23705 states and 60046 transitions. Word has length 59 [2021-06-05 21:12:10,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:12:10,170 INFO L482 AbstractCegarLoop]: Abstraction has 23705 states and 60046 transitions. [2021-06-05 21:12:10,170 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 3.08) internal successors, (77), 24 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:10,170 INFO L276 IsEmpty]: Start isEmpty. Operand 23705 states and 60046 transitions. [2021-06-05 21:12:10,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:12:10,181 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:12:10,181 INFO L554 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:12:10,382 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 545 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1163 [2021-06-05 21:12:10,382 INFO L430 AbstractCegarLoop]: === Iteration 554 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:12:10,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:12:10,382 INFO L82 PathProgramCache]: Analyzing trace with hash 1426088706, now seen corresponding path program 335 times [2021-06-05 21:12:10,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:12:10,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983890233] [2021-06-05 21:12:10,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:12:10,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:12:10,523 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 74 proven. 104 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:12:10,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:12:10,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983890233] [2021-06-05 21:12:10,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983890233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:12:10,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229577250] [2021-06-05 21:12:10,524 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 546 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 546 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:12:10,554 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 21:12:10,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:12:10,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:12:10,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:12:10,671 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 74 proven. 104 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:12:10,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229577250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:12:10,671 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:12:10,671 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 20 [2021-06-05 21:12:10,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763118728] [2021-06-05 21:12:10,671 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:12:10,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:12:10,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:12:10,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:12:10,672 INFO L87 Difference]: Start difference. First operand 23705 states and 60046 transitions. Second operand has 21 states, 21 states have (on average 3.380952380952381) internal successors, (71), 20 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:11,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:12:11,129 INFO L93 Difference]: Finished difference Result 29277 states and 70528 transitions. [2021-06-05 21:12:11,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:12:11,129 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.380952380952381) internal successors, (71), 20 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:12:11,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:12:11,161 INFO L225 Difference]: With dead ends: 29277 [2021-06-05 21:12:11,161 INFO L226 Difference]: Without dead ends: 29214 [2021-06-05 21:12:11,161 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 230.5ms TimeCoverageRelationStatistics Valid=208, Invalid=548, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:12:11,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29214 states. [2021-06-05 21:12:11,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29214 to 23705. [2021-06-05 21:12:11,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23705 states, 23704 states have (on average 2.533032399595005) internal successors, (60043), 23704 states have internal predecessors, (60043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:11,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23705 states to 23705 states and 60043 transitions. [2021-06-05 21:12:11,528 INFO L78 Accepts]: Start accepts. Automaton has 23705 states and 60043 transitions. Word has length 59 [2021-06-05 21:12:11,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:12:11,528 INFO L482 AbstractCegarLoop]: Abstraction has 23705 states and 60043 transitions. [2021-06-05 21:12:11,528 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.380952380952381) internal successors, (71), 20 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:11,528 INFO L276 IsEmpty]: Start isEmpty. Operand 23705 states and 60043 transitions. [2021-06-05 21:12:11,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:12:11,540 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:12:11,540 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:12:11,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1164,546 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:12:11,740 INFO L430 AbstractCegarLoop]: === Iteration 555 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:12:11,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:12:11,740 INFO L82 PathProgramCache]: Analyzing trace with hash -2030174377, now seen corresponding path program 336 times [2021-06-05 21:12:11,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:12:11,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785472412] [2021-06-05 21:12:11,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:12:11,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:12:11,903 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:12:11,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:12:11,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785472412] [2021-06-05 21:12:11,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785472412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:12:11,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845918901] [2021-06-05 21:12:11,903 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 547 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 547 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:12:11,934 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-05 21:12:11,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:12:11,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 21:12:11,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:12:12,016 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:12:12,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845918901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:12:12,016 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:12:12,016 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 18 [2021-06-05 21:12:12,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626282641] [2021-06-05 21:12:12,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:12:12,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:12:12,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:12:12,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:12:12,017 INFO L87 Difference]: Start difference. First operand 23705 states and 60043 transitions. Second operand has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 18 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:12,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:12:12,990 INFO L93 Difference]: Finished difference Result 33949 states and 78972 transitions. [2021-06-05 21:12:12,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 21:12:12,990 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 18 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:12:12,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:12:13,019 INFO L225 Difference]: With dead ends: 33949 [2021-06-05 21:12:13,020 INFO L226 Difference]: Without dead ends: 30265 [2021-06-05 21:12:13,020 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 498.3ms TimeCoverageRelationStatistics Valid=273, Invalid=1367, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 21:12:13,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30265 states. [2021-06-05 21:12:13,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30265 to 13219. [2021-06-05 21:12:13,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13219 states, 13218 states have (on average 2.659479497654713) internal successors, (35153), 13218 states have internal predecessors, (35153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:13,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13219 states to 13219 states and 35153 transitions. [2021-06-05 21:12:13,242 INFO L78 Accepts]: Start accepts. Automaton has 13219 states and 35153 transitions. Word has length 59 [2021-06-05 21:12:13,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:12:13,242 INFO L482 AbstractCegarLoop]: Abstraction has 13219 states and 35153 transitions. [2021-06-05 21:12:13,242 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 18 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:13,242 INFO L276 IsEmpty]: Start isEmpty. Operand 13219 states and 35153 transitions. [2021-06-05 21:12:13,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:12:13,250 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:12:13,250 INFO L554 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:12:13,450 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1173,547 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:12:13,450 INFO L430 AbstractCegarLoop]: === Iteration 556 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:12:13,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:12:13,451 INFO L82 PathProgramCache]: Analyzing trace with hash 2026731402, now seen corresponding path program 161 times [2021-06-05 21:12:13,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:12:13,451 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796471419] [2021-06-05 21:12:13,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:12:13,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:12:13,527 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 114 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:12:13,527 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:12:13,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796471419] [2021-06-05 21:12:13,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796471419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:12:13,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98705210] [2021-06-05 21:12:13,527 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 548 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 548 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:12:13,558 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-05 21:12:13,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:12:13,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:12:13,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:12:13,692 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 114 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:12:13,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98705210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:12:13,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:12:13,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 20 [2021-06-05 21:12:13,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695359635] [2021-06-05 21:12:13,692 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:12:13,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:12:13,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:12:13,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=264, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:12:13,693 INFO L87 Difference]: Start difference. First operand 13219 states and 35153 transitions. Second operand has 21 states, 21 states have (on average 4.428571428571429) internal successors, (93), 20 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:14,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:12:14,098 INFO L93 Difference]: Finished difference Result 15361 states and 39642 transitions. [2021-06-05 21:12:14,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:12:14,098 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.428571428571429) internal successors, (93), 20 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:12:14,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:12:14,118 INFO L225 Difference]: With dead ends: 15361 [2021-06-05 21:12:14,118 INFO L226 Difference]: Without dead ends: 15347 [2021-06-05 21:12:14,118 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 133.8ms TimeCoverageRelationStatistics Valid=173, Invalid=333, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:12:14,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15347 states. [2021-06-05 21:12:14,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15347 to 13918. [2021-06-05 21:12:14,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13918 states, 13917 states have (on average 2.6583315369691745) internal successors, (36996), 13917 states have internal predecessors, (36996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:14,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13918 states to 13918 states and 36996 transitions. [2021-06-05 21:12:14,329 INFO L78 Accepts]: Start accepts. Automaton has 13918 states and 36996 transitions. Word has length 59 [2021-06-05 21:12:14,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:12:14,329 INFO L482 AbstractCegarLoop]: Abstraction has 13918 states and 36996 transitions. [2021-06-05 21:12:14,329 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 4.428571428571429) internal successors, (93), 20 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:14,329 INFO L276 IsEmpty]: Start isEmpty. Operand 13918 states and 36996 transitions. [2021-06-05 21:12:14,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:12:14,337 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:12:14,337 INFO L554 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:12:14,537 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1174,548 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:12:14,537 INFO L430 AbstractCegarLoop]: === Iteration 557 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:12:14,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:12:14,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1404850992, now seen corresponding path program 162 times [2021-06-05 21:12:14,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:12:14,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379921332] [2021-06-05 21:12:14,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:12:14,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:12:14,615 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 114 proven. 64 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:12:14,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:12:14,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379921332] [2021-06-05 21:12:14,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379921332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:12:14,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415752619] [2021-06-05 21:12:14,615 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 549 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 549 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:12:14,646 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-05 21:12:14,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:12:14,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:12:14,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:12:14,734 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 114 proven. 64 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:12:14,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415752619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:12:14,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:12:14,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 12 [2021-06-05 21:12:14,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915253226] [2021-06-05 21:12:14,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:12:14,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:12:14,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:12:14,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:12:14,735 INFO L87 Difference]: Start difference. First operand 13918 states and 36996 transitions. Second operand has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:15,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:12:15,020 INFO L93 Difference]: Finished difference Result 16530 states and 42212 transitions. [2021-06-05 21:12:15,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:12:15,020 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:12:15,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:12:15,040 INFO L225 Difference]: With dead ends: 16530 [2021-06-05 21:12:15,040 INFO L226 Difference]: Without dead ends: 16530 [2021-06-05 21:12:15,040 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 134.5ms TimeCoverageRelationStatistics Valid=172, Invalid=248, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:12:15,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16530 states. [2021-06-05 21:12:15,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16530 to 13921. [2021-06-05 21:12:15,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13921 states, 13920 states have (on average 2.658405172413793) internal successors, (37005), 13920 states have internal predecessors, (37005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:15,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13921 states to 13921 states and 37005 transitions. [2021-06-05 21:12:15,247 INFO L78 Accepts]: Start accepts. Automaton has 13921 states and 37005 transitions. Word has length 59 [2021-06-05 21:12:15,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:12:15,247 INFO L482 AbstractCegarLoop]: Abstraction has 13921 states and 37005 transitions. [2021-06-05 21:12:15,247 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:15,247 INFO L276 IsEmpty]: Start isEmpty. Operand 13921 states and 37005 transitions. [2021-06-05 21:12:15,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:12:15,255 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:12:15,255 INFO L554 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:12:15,455 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1176,549 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:12:15,455 INFO L430 AbstractCegarLoop]: === Iteration 558 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:12:15,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:12:15,455 INFO L82 PathProgramCache]: Analyzing trace with hash -232721464, now seen corresponding path program 163 times [2021-06-05 21:12:15,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:12:15,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80411940] [2021-06-05 21:12:15,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:12:15,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:12:15,543 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 115 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:12:15,543 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:12:15,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80411940] [2021-06-05 21:12:15,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80411940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:12:15,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723971963] [2021-06-05 21:12:15,543 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 550 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 550 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:12:15,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:12:15,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:12:15,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:12:15,685 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 116 proven. 62 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:12:15,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723971963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:12:15,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:12:15,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 15 [2021-06-05 21:12:15,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058581678] [2021-06-05 21:12:15,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:12:15,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:12:15,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:12:15,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:12:15,685 INFO L87 Difference]: Start difference. First operand 13921 states and 37005 transitions. Second operand has 16 states, 16 states have (on average 4.1875) internal successors, (67), 15 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:16,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:12:16,221 INFO L93 Difference]: Finished difference Result 15683 states and 40328 transitions. [2021-06-05 21:12:16,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 21:12:16,222 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.1875) internal successors, (67), 15 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:12:16,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:12:16,241 INFO L225 Difference]: With dead ends: 15683 [2021-06-05 21:12:16,241 INFO L226 Difference]: Without dead ends: 15683 [2021-06-05 21:12:16,241 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 300.2ms TimeCoverageRelationStatistics Valid=412, Invalid=710, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 21:12:16,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15683 states. [2021-06-05 21:12:16,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15683 to 13639. [2021-06-05 21:12:16,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13639 states, 13638 states have (on average 2.6627804663440386) internal successors, (36315), 13638 states have internal predecessors, (36315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:16,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13639 states to 13639 states and 36315 transitions. [2021-06-05 21:12:16,434 INFO L78 Accepts]: Start accepts. Automaton has 13639 states and 36315 transitions. Word has length 59 [2021-06-05 21:12:16,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:12:16,434 INFO L482 AbstractCegarLoop]: Abstraction has 13639 states and 36315 transitions. [2021-06-05 21:12:16,434 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.1875) internal successors, (67), 15 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:16,434 INFO L276 IsEmpty]: Start isEmpty. Operand 13639 states and 36315 transitions. [2021-06-05 21:12:16,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 21:12:16,442 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:12:16,442 INFO L554 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:12:16,642 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 550 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1177 [2021-06-05 21:12:16,642 INFO L430 AbstractCegarLoop]: === Iteration 559 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:12:16,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:12:16,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1702913116, now seen corresponding path program 337 times [2021-06-05 21:12:16,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:12:16,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742941308] [2021-06-05 21:12:16,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:12:16,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:12:16,795 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 94 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:12:16,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:12:16,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742941308] [2021-06-05 21:12:16,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742941308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:12:16,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952935940] [2021-06-05 21:12:16,795 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 551 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 551 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:12:16,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:12:16,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:12:16,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:12:16,910 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 94 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:12:16,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952935940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:12:16,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:12:16,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-06-05 21:12:16,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096675500] [2021-06-05 21:12:16,911 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:12:16,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:12:16,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:12:16,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:12:16,911 INFO L87 Difference]: Start difference. First operand 13639 states and 36315 transitions. Second operand has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:17,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:12:17,335 INFO L93 Difference]: Finished difference Result 15972 states and 40554 transitions. [2021-06-05 21:12:17,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:12:17,335 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 21:12:17,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:12:17,352 INFO L225 Difference]: With dead ends: 15972 [2021-06-05 21:12:17,353 INFO L226 Difference]: Without dead ends: 15898 [2021-06-05 21:12:17,353 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 218.6ms TimeCoverageRelationStatistics Valid=215, Invalid=487, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:12:17,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15898 states. [2021-06-05 21:12:17,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15898 to 13648. [2021-06-05 21:12:17,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13648 states, 13647 states have (on average 2.6620502674580493) internal successors, (36329), 13647 states have internal predecessors, (36329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:17,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13648 states to 13648 states and 36329 transitions. [2021-06-05 21:12:17,561 INFO L78 Accepts]: Start accepts. Automaton has 13648 states and 36329 transitions. Word has length 59 [2021-06-05 21:12:17,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:12:17,561 INFO L482 AbstractCegarLoop]: Abstraction has 13648 states and 36329 transitions. [2021-06-05 21:12:17,561 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:17,561 INFO L276 IsEmpty]: Start isEmpty. Operand 13648 states and 36329 transitions. [2021-06-05 21:12:17,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-06-05 21:12:17,570 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:12:17,570 INFO L554 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:12:17,770 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1180,551 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:12:17,770 INFO L430 AbstractCegarLoop]: === Iteration 560 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:12:17,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:12:17,770 INFO L82 PathProgramCache]: Analyzing trace with hash -911313595, now seen corresponding path program 338 times [2021-06-05 21:12:17,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:12:17,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627727548] [2021-06-05 21:12:17,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:12:17,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:12:17,846 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 199 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:12:17,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:12:17,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627727548] [2021-06-05 21:12:17,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627727548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:12:17,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195637121] [2021-06-05 21:12:17,846 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 552 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 552 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:12:17,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:12:17,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:12:17,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:12:17,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:12:18,271 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 92 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:12:18,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195637121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:12:18,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:12:18,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 19] total 28 [2021-06-05 21:12:18,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656952283] [2021-06-05 21:12:18,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 21:12:18,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:12:18,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 21:12:18,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=685, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:12:18,272 INFO L87 Difference]: Start difference. First operand 13648 states and 36329 transitions. Second operand has 29 states, 29 states have (on average 4.241379310344827) internal successors, (123), 28 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:20,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:12:20,062 INFO L93 Difference]: Finished difference Result 17222 states and 43443 transitions. [2021-06-05 21:12:20,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 21:12:20,062 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.241379310344827) internal successors, (123), 28 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-06-05 21:12:20,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:12:20,084 INFO L225 Difference]: With dead ends: 17222 [2021-06-05 21:12:20,084 INFO L226 Difference]: Without dead ends: 17184 [2021-06-05 21:12:20,084 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1198 ImplicationChecksByTransitivity, 1012.3ms TimeCoverageRelationStatistics Valid=971, Invalid=4141, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 21:12:20,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17184 states. [2021-06-05 21:12:20,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17184 to 14862. [2021-06-05 21:12:20,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14862 states, 14861 states have (on average 2.622905591817509) internal successors, (38979), 14861 states have internal predecessors, (38979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:20,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14862 states to 14862 states and 38979 transitions. [2021-06-05 21:12:20,299 INFO L78 Accepts]: Start accepts. Automaton has 14862 states and 38979 transitions. Word has length 62 [2021-06-05 21:12:20,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:12:20,299 INFO L482 AbstractCegarLoop]: Abstraction has 14862 states and 38979 transitions. [2021-06-05 21:12:20,299 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 4.241379310344827) internal successors, (123), 28 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:20,299 INFO L276 IsEmpty]: Start isEmpty. Operand 14862 states and 38979 transitions. [2021-06-05 21:12:20,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-06-05 21:12:20,308 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:12:20,308 INFO L554 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:12:20,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 552 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1190 [2021-06-05 21:12:20,509 INFO L430 AbstractCegarLoop]: === Iteration 561 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:12:20,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:12:20,509 INFO L82 PathProgramCache]: Analyzing trace with hash 2125604839, now seen corresponding path program 339 times [2021-06-05 21:12:20,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:12:20,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494380439] [2021-06-05 21:12:20,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:12:20,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:12:20,585 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 194 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 21:12:20,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:12:20,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494380439] [2021-06-05 21:12:20,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494380439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:12:20,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465921489] [2021-06-05 21:12:20,585 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 553 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 553 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:12:20,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-06-05 21:12:20,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:12:20,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 21:12:20,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:12:20,695 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 194 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 21:12:20,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465921489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:12:20,696 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:12:20,696 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 21:12:20,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368531236] [2021-06-05 21:12:20,696 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:12:20,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:12:20,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:12:20,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:12:20,696 INFO L87 Difference]: Start difference. First operand 14862 states and 38979 transitions. Second operand has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 10 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:21,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:12:21,108 INFO L93 Difference]: Finished difference Result 16116 states and 41321 transitions. [2021-06-05 21:12:21,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:12:21,108 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 10 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-06-05 21:12:21,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:12:21,127 INFO L225 Difference]: With dead ends: 16116 [2021-06-05 21:12:21,127 INFO L226 Difference]: Without dead ends: 16081 [2021-06-05 21:12:21,127 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 62.3ms TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:12:21,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16081 states. [2021-06-05 21:12:21,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16081 to 14880. [2021-06-05 21:12:21,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14880 states, 14879 states have (on average 2.62228644398145) internal successors, (39017), 14879 states have internal predecessors, (39017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:21,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14880 states to 14880 states and 39017 transitions. [2021-06-05 21:12:21,348 INFO L78 Accepts]: Start accepts. Automaton has 14880 states and 39017 transitions. Word has length 62 [2021-06-05 21:12:21,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:12:21,348 INFO L482 AbstractCegarLoop]: Abstraction has 14880 states and 39017 transitions. [2021-06-05 21:12:21,348 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 10 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:21,348 INFO L276 IsEmpty]: Start isEmpty. Operand 14880 states and 39017 transitions. [2021-06-05 21:12:21,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-06-05 21:12:21,357 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:12:21,357 INFO L554 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:12:21,557 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1191,553 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:12:21,558 INFO L430 AbstractCegarLoop]: === Iteration 562 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:12:21,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:12:21,558 INFO L82 PathProgramCache]: Analyzing trace with hash -845583229, now seen corresponding path program 340 times [2021-06-05 21:12:21,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:12:21,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041549351] [2021-06-05 21:12:21,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:12:21,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:12:21,633 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 194 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 21:12:21,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:12:21,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041549351] [2021-06-05 21:12:21,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041549351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:12:21,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858533472] [2021-06-05 21:12:21,633 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 554 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 554 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:12:21,660 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:12:21,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:12:21,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 21:12:21,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:12:21,814 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 194 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 21:12:21,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858533472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:12:21,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:12:21,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 21:12:21,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189655616] [2021-06-05 21:12:21,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:12:21,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:12:21,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:12:21,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:12:21,815 INFO L87 Difference]: Start difference. First operand 14880 states and 39017 transitions. Second operand has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 10 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:22,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:12:22,228 INFO L93 Difference]: Finished difference Result 16292 states and 41632 transitions. [2021-06-05 21:12:22,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:12:22,229 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 10 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-06-05 21:12:22,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:12:22,247 INFO L225 Difference]: With dead ends: 16292 [2021-06-05 21:12:22,247 INFO L226 Difference]: Without dead ends: 16254 [2021-06-05 21:12:22,247 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 62.3ms TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:12:22,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16254 states. [2021-06-05 21:12:22,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16254 to 14979. [2021-06-05 21:12:22,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14979 states, 14978 states have (on average 2.617038322873548) internal successors, (39198), 14978 states have internal predecessors, (39198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:22,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14979 states to 14979 states and 39198 transitions. [2021-06-05 21:12:22,456 INFO L78 Accepts]: Start accepts. Automaton has 14979 states and 39198 transitions. Word has length 62 [2021-06-05 21:12:22,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:12:22,457 INFO L482 AbstractCegarLoop]: Abstraction has 14979 states and 39198 transitions. [2021-06-05 21:12:22,457 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 10 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:22,457 INFO L276 IsEmpty]: Start isEmpty. Operand 14979 states and 39198 transitions. [2021-06-05 21:12:22,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-06-05 21:12:22,465 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:12:22,465 INFO L554 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:12:22,666 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1192,554 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:12:22,666 INFO L430 AbstractCegarLoop]: === Iteration 563 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:12:22,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:12:22,666 INFO L82 PathProgramCache]: Analyzing trace with hash -528313753, now seen corresponding path program 341 times [2021-06-05 21:12:22,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:12:22,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215674066] [2021-06-05 21:12:22,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:12:22,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:12:22,742 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 194 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 21:12:22,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:12:22,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215674066] [2021-06-05 21:12:22,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215674066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:12:22,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983377254] [2021-06-05 21:12:22,742 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 555 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 555 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:12:22,775 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-06-05 21:12:22,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:12:22,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 21:12:22,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:12:22,854 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 194 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 21:12:22,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983377254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:12:22,854 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:12:22,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 21:12:22,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268255807] [2021-06-05 21:12:22,854 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:12:22,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:12:22,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:12:22,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:12:22,855 INFO L87 Difference]: Start difference. First operand 14979 states and 39198 transitions. Second operand has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 10 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:23,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:12:23,271 INFO L93 Difference]: Finished difference Result 16320 states and 41716 transitions. [2021-06-05 21:12:23,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:12:23,271 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 10 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-06-05 21:12:23,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:12:23,290 INFO L225 Difference]: With dead ends: 16320 [2021-06-05 21:12:23,290 INFO L226 Difference]: Without dead ends: 16260 [2021-06-05 21:12:23,290 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 62.6ms TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:12:23,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16260 states. [2021-06-05 21:12:23,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16260 to 15051. [2021-06-05 21:12:23,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15051 states, 15050 states have (on average 2.613421926910299) internal successors, (39332), 15050 states have internal predecessors, (39332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:23,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15051 states to 15051 states and 39332 transitions. [2021-06-05 21:12:23,499 INFO L78 Accepts]: Start accepts. Automaton has 15051 states and 39332 transitions. Word has length 62 [2021-06-05 21:12:23,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:12:23,499 INFO L482 AbstractCegarLoop]: Abstraction has 15051 states and 39332 transitions. [2021-06-05 21:12:23,499 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 10 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:23,499 INFO L276 IsEmpty]: Start isEmpty. Operand 15051 states and 39332 transitions. [2021-06-05 21:12:23,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-06-05 21:12:23,508 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:12:23,508 INFO L554 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:12:23,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1193,555 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:12:23,709 INFO L430 AbstractCegarLoop]: === Iteration 564 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:12:23,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:12:23,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1976372733, now seen corresponding path program 342 times [2021-06-05 21:12:23,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:12:23,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135289035] [2021-06-05 21:12:23,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:12:23,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:12:23,797 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 194 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 21:12:23,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:12:23,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135289035] [2021-06-05 21:12:23,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135289035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:12:23,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910778532] [2021-06-05 21:12:23,798 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 556 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 556 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:12:23,849 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-06-05 21:12:23,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:12:23,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:12:23,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:12:24,088 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 44 proven. 155 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:12:24,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910778532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:12:24,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:12:24,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-05 21:12:24,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191463009] [2021-06-05 21:12:24,089 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:12:24,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:12:24,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:12:24,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:12:24,089 INFO L87 Difference]: Start difference. First operand 15051 states and 39332 transitions. Second operand has 21 states, 21 states have (on average 5.714285714285714) internal successors, (120), 20 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:25,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:12:25,280 INFO L93 Difference]: Finished difference Result 22065 states and 52580 transitions. [2021-06-05 21:12:25,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 21:12:25,280 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.714285714285714) internal successors, (120), 20 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-06-05 21:12:25,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:12:25,304 INFO L225 Difference]: With dead ends: 22065 [2021-06-05 21:12:25,304 INFO L226 Difference]: Without dead ends: 21976 [2021-06-05 21:12:25,305 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 522.9ms TimeCoverageRelationStatistics Valid=390, Invalid=1866, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 21:12:25,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21976 states. [2021-06-05 21:12:25,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21976 to 15162. [2021-06-05 21:12:25,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15162 states, 15161 states have (on average 2.608403139634589) internal successors, (39546), 15161 states have internal predecessors, (39546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:25,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15162 states to 15162 states and 39546 transitions. [2021-06-05 21:12:25,531 INFO L78 Accepts]: Start accepts. Automaton has 15162 states and 39546 transitions. Word has length 62 [2021-06-05 21:12:25,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:12:25,531 INFO L482 AbstractCegarLoop]: Abstraction has 15162 states and 39546 transitions. [2021-06-05 21:12:25,531 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.714285714285714) internal successors, (120), 20 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:25,531 INFO L276 IsEmpty]: Start isEmpty. Operand 15162 states and 39546 transitions. [2021-06-05 21:12:25,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-06-05 21:12:25,540 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:12:25,540 INFO L554 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:12:25,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1194,556 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:12:25,740 INFO L430 AbstractCegarLoop]: === Iteration 565 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:12:25,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:12:25,740 INFO L82 PathProgramCache]: Analyzing trace with hash 1845042407, now seen corresponding path program 343 times [2021-06-05 21:12:25,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:12:25,740 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647569777] [2021-06-05 21:12:25,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:12:25,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:12:25,814 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 194 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 21:12:25,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:12:25,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647569777] [2021-06-05 21:12:25,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647569777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:12:25,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677066496] [2021-06-05 21:12:25,814 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 557 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 557 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:12:25,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:12:25,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 21:12:25,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:12:25,918 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 194 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 21:12:25,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677066496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:12:25,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:12:25,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 21:12:25,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037612460] [2021-06-05 21:12:25,918 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:12:25,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:12:25,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:12:25,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:12:25,919 INFO L87 Difference]: Start difference. First operand 15162 states and 39546 transitions. Second operand has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 10 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:26,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:12:26,378 INFO L93 Difference]: Finished difference Result 16450 states and 42034 transitions. [2021-06-05 21:12:26,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:12:26,379 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 10 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-06-05 21:12:26,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:12:26,397 INFO L225 Difference]: With dead ends: 16450 [2021-06-05 21:12:26,397 INFO L226 Difference]: Without dead ends: 16412 [2021-06-05 21:12:26,397 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 61.1ms TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:12:26,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16412 states. [2021-06-05 21:12:26,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16412 to 15288. [2021-06-05 21:12:26,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15288 states, 15287 states have (on average 2.6023418590959637) internal successors, (39782), 15287 states have internal predecessors, (39782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:26,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15288 states to 15288 states and 39782 transitions. [2021-06-05 21:12:26,596 INFO L78 Accepts]: Start accepts. Automaton has 15288 states and 39782 transitions. Word has length 62 [2021-06-05 21:12:26,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:12:26,596 INFO L482 AbstractCegarLoop]: Abstraction has 15288 states and 39782 transitions. [2021-06-05 21:12:26,596 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 10 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:26,597 INFO L276 IsEmpty]: Start isEmpty. Operand 15288 states and 39782 transitions. [2021-06-05 21:12:26,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-06-05 21:12:26,606 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:12:26,606 INFO L554 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:12:26,806 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1195,557 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:12:26,807 INFO L430 AbstractCegarLoop]: === Iteration 566 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:12:26,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:12:26,807 INFO L82 PathProgramCache]: Analyzing trace with hash -1074636925, now seen corresponding path program 344 times [2021-06-05 21:12:26,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:12:26,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528981421] [2021-06-05 21:12:26,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:12:26,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:12:26,881 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 194 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 21:12:26,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:12:26,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528981421] [2021-06-05 21:12:26,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528981421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:12:26,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142883653] [2021-06-05 21:12:26,882 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 558 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 558 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:12:26,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:12:26,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:12:26,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:12:26,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:12:27,126 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 48 proven. 151 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:12:27,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142883653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:12:27,127 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:12:27,127 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-05 21:12:27,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534573643] [2021-06-05 21:12:27,127 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:12:27,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:12:27,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:12:27,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:12:27,127 INFO L87 Difference]: Start difference. First operand 15288 states and 39782 transitions. Second operand has 21 states, 21 states have (on average 5.714285714285714) internal successors, (120), 20 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:28,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:12:28,317 INFO L93 Difference]: Finished difference Result 22675 states and 53617 transitions. [2021-06-05 21:12:28,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 21:12:28,317 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.714285714285714) internal successors, (120), 20 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-06-05 21:12:28,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:12:28,342 INFO L225 Difference]: With dead ends: 22675 [2021-06-05 21:12:28,342 INFO L226 Difference]: Without dead ends: 22612 [2021-06-05 21:12:28,343 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 506.8ms TimeCoverageRelationStatistics Valid=390, Invalid=1866, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 21:12:28,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22612 states. [2021-06-05 21:12:28,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22612 to 15453. [2021-06-05 21:12:28,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15453 states, 15452 states have (on average 2.595392182241781) internal successors, (40104), 15452 states have internal predecessors, (40104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:28,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15453 states to 15453 states and 40104 transitions. [2021-06-05 21:12:28,593 INFO L78 Accepts]: Start accepts. Automaton has 15453 states and 40104 transitions. Word has length 62 [2021-06-05 21:12:28,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:12:28,593 INFO L482 AbstractCegarLoop]: Abstraction has 15453 states and 40104 transitions. [2021-06-05 21:12:28,593 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.714285714285714) internal successors, (120), 20 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:28,593 INFO L276 IsEmpty]: Start isEmpty. Operand 15453 states and 40104 transitions. [2021-06-05 21:12:28,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-06-05 21:12:28,603 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:12:28,603 INFO L554 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:12:28,803 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1196,558 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:12:28,803 INFO L430 AbstractCegarLoop]: === Iteration 567 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:12:28,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:12:28,803 INFO L82 PathProgramCache]: Analyzing trace with hash 436062055, now seen corresponding path program 345 times [2021-06-05 21:12:28,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:12:28,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942153610] [2021-06-05 21:12:28,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:12:28,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:12:28,891 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 194 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 21:12:28,892 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:12:28,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942153610] [2021-06-05 21:12:28,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942153610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:12:28,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9614188] [2021-06-05 21:12:28,892 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 559 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 559 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:12:28,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-06-05 21:12:28,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:12:28,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:12:28,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:12:29,150 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 59 proven. 140 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:12:29,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9614188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:12:29,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:12:29,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-05 21:12:29,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873384472] [2021-06-05 21:12:29,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:12:29,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:12:29,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:12:29,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:12:29,151 INFO L87 Difference]: Start difference. First operand 15453 states and 40104 transitions. Second operand has 21 states, 21 states have (on average 5.714285714285714) internal successors, (120), 20 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:30,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:12:30,329 INFO L93 Difference]: Finished difference Result 23187 states and 55034 transitions. [2021-06-05 21:12:30,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 21:12:30,329 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.714285714285714) internal successors, (120), 20 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-06-05 21:12:30,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:12:30,355 INFO L225 Difference]: With dead ends: 23187 [2021-06-05 21:12:30,356 INFO L226 Difference]: Without dead ends: 23122 [2021-06-05 21:12:30,356 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 527.4ms TimeCoverageRelationStatistics Valid=390, Invalid=1866, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 21:12:30,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23122 states. [2021-06-05 21:12:30,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23122 to 16198. [2021-06-05 21:12:30,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16198 states, 16197 states have (on average 2.5986911156386987) internal successors, (42091), 16197 states have internal predecessors, (42091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:30,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16198 states to 16198 states and 42091 transitions. [2021-06-05 21:12:30,626 INFO L78 Accepts]: Start accepts. Automaton has 16198 states and 42091 transitions. Word has length 62 [2021-06-05 21:12:30,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:12:30,626 INFO L482 AbstractCegarLoop]: Abstraction has 16198 states and 42091 transitions. [2021-06-05 21:12:30,626 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.714285714285714) internal successors, (120), 20 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:30,626 INFO L276 IsEmpty]: Start isEmpty. Operand 16198 states and 42091 transitions. [2021-06-05 21:12:30,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-06-05 21:12:30,636 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:12:30,636 INFO L554 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:12:30,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1197,559 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:12:30,836 INFO L430 AbstractCegarLoop]: === Iteration 568 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:12:30,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:12:30,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1292919549, now seen corresponding path program 346 times [2021-06-05 21:12:30,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:12:30,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467323425] [2021-06-05 21:12:30,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:12:30,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:12:30,987 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:12:30,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:12:30,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467323425] [2021-06-05 21:12:30,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467323425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:12:30,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439252571] [2021-06-05 21:12:30,987 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 560 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 560 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:12:31,015 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:12:31,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:12:31,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 21:12:31,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:12:31,101 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:12:31,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439252571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:12:31,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:12:31,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 21:12:31,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252882890] [2021-06-05 21:12:31,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:12:31,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:12:31,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:12:31,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:12:31,102 INFO L87 Difference]: Start difference. First operand 16198 states and 42091 transitions. Second operand has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 10 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:31,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:12:31,505 INFO L93 Difference]: Finished difference Result 18245 states and 46468 transitions. [2021-06-05 21:12:31,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:12:31,505 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 10 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-06-05 21:12:31,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:12:31,526 INFO L225 Difference]: With dead ends: 18245 [2021-06-05 21:12:31,526 INFO L226 Difference]: Without dead ends: 18220 [2021-06-05 21:12:31,526 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 137.4ms TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:12:31,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18220 states. [2021-06-05 21:12:31,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18220 to 16907. [2021-06-05 21:12:31,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16907 states, 16906 states have (on average 2.594522654678812) internal successors, (43863), 16906 states have internal predecessors, (43863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:31,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16907 states to 16907 states and 43863 transitions. [2021-06-05 21:12:31,734 INFO L78 Accepts]: Start accepts. Automaton has 16907 states and 43863 transitions. Word has length 62 [2021-06-05 21:12:31,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:12:31,735 INFO L482 AbstractCegarLoop]: Abstraction has 16907 states and 43863 transitions. [2021-06-05 21:12:31,735 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 10 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:31,735 INFO L276 IsEmpty]: Start isEmpty. Operand 16907 states and 43863 transitions. [2021-06-05 21:12:31,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 21:12:31,745 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:12:31,745 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:12:31,945 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 560 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1198 [2021-06-05 21:12:31,945 INFO L430 AbstractCegarLoop]: === Iteration 569 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:12:31,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:12:31,946 INFO L82 PathProgramCache]: Analyzing trace with hash 1959224392, now seen corresponding path program 164 times [2021-06-05 21:12:31,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:12:31,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559702987] [2021-06-05 21:12:31,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:12:31,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:12:32,149 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 9 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:12:32,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:12:32,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559702987] [2021-06-05 21:12:32,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559702987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:12:32,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090010939] [2021-06-05 21:12:32,149 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 561 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 561 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:12:32,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:12:32,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:12:32,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:12:32,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:12:33,270 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 93 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:12:33,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090010939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:12:33,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:12:33,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 23] total 41 [2021-06-05 21:12:33,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912060432] [2021-06-05 21:12:33,270 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-06-05 21:12:33,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:12:33,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-06-05 21:12:33,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1563, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 21:12:33,271 INFO L87 Difference]: Start difference. First operand 16907 states and 43863 transitions. Second operand has 42 states, 42 states have (on average 2.9047619047619047) internal successors, (122), 41 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:55,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:12:55,797 INFO L93 Difference]: Finished difference Result 40647 states and 93712 transitions. [2021-06-05 21:12:55,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 408 states. [2021-06-05 21:12:55,797 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.9047619047619047) internal successors, (122), 41 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 21:12:55,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:12:55,845 INFO L225 Difference]: With dead ends: 40647 [2021-06-05 21:12:55,845 INFO L226 Difference]: Without dead ends: 39783 [2021-06-05 21:12:55,853 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 433 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80537 ImplicationChecksByTransitivity, 19834.2ms TimeCoverageRelationStatistics Valid=22109, Invalid=166681, Unknown=0, NotChecked=0, Total=188790 [2021-06-05 21:12:55,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39783 states. [2021-06-05 21:12:56,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39783 to 20292. [2021-06-05 21:12:56,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20292 states, 20291 states have (on average 2.6370311960967916) internal successors, (53508), 20291 states have internal predecessors, (53508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:56,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20292 states to 20292 states and 53508 transitions. [2021-06-05 21:12:56,240 INFO L78 Accepts]: Start accepts. Automaton has 20292 states and 53508 transitions. Word has length 65 [2021-06-05 21:12:56,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:12:56,240 INFO L482 AbstractCegarLoop]: Abstraction has 20292 states and 53508 transitions. [2021-06-05 21:12:56,240 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.9047619047619047) internal successors, (122), 41 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:56,240 INFO L276 IsEmpty]: Start isEmpty. Operand 20292 states and 53508 transitions. [2021-06-05 21:12:56,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 21:12:56,253 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:12:56,254 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:12:56,454 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 561 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1199 [2021-06-05 21:12:56,454 INFO L430 AbstractCegarLoop]: === Iteration 570 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:12:56,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:12:56,454 INFO L82 PathProgramCache]: Analyzing trace with hash -1290275768, now seen corresponding path program 347 times [2021-06-05 21:12:56,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:12:56,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800964491] [2021-06-05 21:12:56,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:12:56,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:12:56,666 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 19 proven. 207 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:12:56,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:12:56,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800964491] [2021-06-05 21:12:56,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800964491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:12:56,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412137786] [2021-06-05 21:12:56,666 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 562 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 562 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:12:56,699 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-05 21:12:56,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:12:56,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 21:12:56,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:12:57,078 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 17 proven. 209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:12:57,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412137786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:12:57,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:12:57,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 28 [2021-06-05 21:12:57,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575876453] [2021-06-05 21:12:57,079 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 21:12:57,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:12:57,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 21:12:57,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=739, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:12:57,079 INFO L87 Difference]: Start difference. First operand 20292 states and 53508 transitions. Second operand has 29 states, 29 states have (on average 3.2413793103448274) internal successors, (94), 28 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:58,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:12:58,707 INFO L93 Difference]: Finished difference Result 20618 states and 54021 transitions. [2021-06-05 21:12:58,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:12:58,707 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.2413793103448274) internal successors, (94), 28 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 21:12:58,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:12:58,729 INFO L225 Difference]: With dead ends: 20618 [2021-06-05 21:12:58,729 INFO L226 Difference]: Without dead ends: 20502 [2021-06-05 21:12:58,729 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 422.8ms TimeCoverageRelationStatistics Valid=73, Invalid=739, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:12:58,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20502 states. [2021-06-05 21:12:58,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20502 to 20276. [2021-06-05 21:12:58,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20276 states, 20275 states have (on average 2.635906288532676) internal successors, (53443), 20275 states have internal predecessors, (53443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:59,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20276 states to 20276 states and 53443 transitions. [2021-06-05 21:12:59,016 INFO L78 Accepts]: Start accepts. Automaton has 20276 states and 53443 transitions. Word has length 65 [2021-06-05 21:12:59,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:12:59,016 INFO L482 AbstractCegarLoop]: Abstraction has 20276 states and 53443 transitions. [2021-06-05 21:12:59,016 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 3.2413793103448274) internal successors, (94), 28 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:59,016 INFO L276 IsEmpty]: Start isEmpty. Operand 20276 states and 53443 transitions. [2021-06-05 21:12:59,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 21:12:59,031 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:12:59,031 INFO L554 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:12:59,231 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 562 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1212 [2021-06-05 21:12:59,231 INFO L430 AbstractCegarLoop]: === Iteration 571 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:12:59,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:12:59,231 INFO L82 PathProgramCache]: Analyzing trace with hash 708589307, now seen corresponding path program 165 times [2021-06-05 21:12:59,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:12:59,232 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529735943] [2021-06-05 21:12:59,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:12:59,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:12:59,317 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 104 proven. 123 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:12:59,317 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:12:59,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529735943] [2021-06-05 21:12:59,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529735943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:12:59,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017808625] [2021-06-05 21:12:59,317 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 563 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 563 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:12:59,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 21:12:59,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:12:59,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:12:59,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:12:59,448 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 105 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:12:59,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017808625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:12:59,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:12:59,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-06-05 21:12:59,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466148514] [2021-06-05 21:12:59,449 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:12:59,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:12:59,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:12:59,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:12:59,449 INFO L87 Difference]: Start difference. First operand 20276 states and 53443 transitions. Second operand has 14 states, 14 states have (on average 5.0) internal successors, (70), 13 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:59,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:12:59,671 INFO L93 Difference]: Finished difference Result 27245 states and 66968 transitions. [2021-06-05 21:12:59,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:12:59,672 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 13 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 21:12:59,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:12:59,707 INFO L225 Difference]: With dead ends: 27245 [2021-06-05 21:12:59,707 INFO L226 Difference]: Without dead ends: 27235 [2021-06-05 21:12:59,708 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 92.3ms TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:12:59,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27235 states. [2021-06-05 21:12:59,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27235 to 20359. [2021-06-05 21:12:59,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20359 states, 20358 states have (on average 2.638324000392966) internal successors, (53711), 20358 states have internal predecessors, (53711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:00,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20359 states to 20359 states and 53711 transitions. [2021-06-05 21:13:00,033 INFO L78 Accepts]: Start accepts. Automaton has 20359 states and 53711 transitions. Word has length 65 [2021-06-05 21:13:00,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:00,033 INFO L482 AbstractCegarLoop]: Abstraction has 20359 states and 53711 transitions. [2021-06-05 21:13:00,034 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 13 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:00,034 INFO L276 IsEmpty]: Start isEmpty. Operand 20359 states and 53711 transitions. [2021-06-05 21:13:00,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 21:13:00,048 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:00,049 INFO L554 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:00,249 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 563 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1213 [2021-06-05 21:13:00,249 INFO L430 AbstractCegarLoop]: === Iteration 572 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:00,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:00,249 INFO L82 PathProgramCache]: Analyzing trace with hash -248603333, now seen corresponding path program 166 times [2021-06-05 21:13:00,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:00,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849308859] [2021-06-05 21:13:00,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:00,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:00,334 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 128 proven. 99 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:13:00,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:00,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849308859] [2021-06-05 21:13:00,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849308859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:00,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850858793] [2021-06-05 21:13:00,335 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 564 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 564 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:00,364 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:13:00,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:00,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:13:00,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:00,467 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 129 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:00,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850858793] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:00,467 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:00,467 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-06-05 21:13:00,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041571332] [2021-06-05 21:13:00,467 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:13:00,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:00,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:13:00,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=110, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:13:00,468 INFO L87 Difference]: Start difference. First operand 20359 states and 53711 transitions. Second operand has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:00,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:00,717 INFO L93 Difference]: Finished difference Result 30078 states and 74504 transitions. [2021-06-05 21:13:00,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:13:00,718 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 21:13:00,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:00,756 INFO L225 Difference]: With dead ends: 30078 [2021-06-05 21:13:00,757 INFO L226 Difference]: Without dead ends: 30078 [2021-06-05 21:13:00,757 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 88.5ms TimeCoverageRelationStatistics Valid=86, Invalid=124, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:13:00,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30078 states. [2021-06-05 21:13:01,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30078 to 22013. [2021-06-05 21:13:01,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22013 states, 22012 states have (on average 2.6694075958568053) internal successors, (58759), 22012 states have internal predecessors, (58759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:01,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22013 states to 22013 states and 58759 transitions. [2021-06-05 21:13:01,129 INFO L78 Accepts]: Start accepts. Automaton has 22013 states and 58759 transitions. Word has length 65 [2021-06-05 21:13:01,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:01,129 INFO L482 AbstractCegarLoop]: Abstraction has 22013 states and 58759 transitions. [2021-06-05 21:13:01,129 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:01,129 INFO L276 IsEmpty]: Start isEmpty. Operand 22013 states and 58759 transitions. [2021-06-05 21:13:01,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 21:13:01,144 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:01,144 INFO L554 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:01,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 564 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1216 [2021-06-05 21:13:01,344 INFO L430 AbstractCegarLoop]: === Iteration 573 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:01,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:01,344 INFO L82 PathProgramCache]: Analyzing trace with hash -782468709, now seen corresponding path program 348 times [2021-06-05 21:13:01,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:01,344 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464043292] [2021-06-05 21:13:01,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:01,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:01,429 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 111 proven. 116 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:13:01,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:01,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464043292] [2021-06-05 21:13:01,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464043292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:01,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050219945] [2021-06-05 21:13:01,430 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 565 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 565 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:01,463 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 21:13:01,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:01,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:13:01,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:01,555 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 111 proven. 116 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:13:01,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050219945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:01,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:01,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-05 21:13:01,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874045249] [2021-06-05 21:13:01,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:13:01,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:01,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:13:01,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:13:01,555 INFO L87 Difference]: Start difference. First operand 22013 states and 58759 transitions. Second operand has 13 states, 13 states have (on average 5.0) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:01,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:01,845 INFO L93 Difference]: Finished difference Result 23642 states and 61469 transitions. [2021-06-05 21:13:01,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:13:01,845 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 21:13:01,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:01,873 INFO L225 Difference]: With dead ends: 23642 [2021-06-05 21:13:01,873 INFO L226 Difference]: Without dead ends: 23636 [2021-06-05 21:13:01,873 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 78.4ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:13:01,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23636 states. [2021-06-05 21:13:02,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23636 to 21888. [2021-06-05 21:13:02,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21888 states, 21887 states have (on average 2.666971261479417) internal successors, (58372), 21887 states have internal predecessors, (58372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:02,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21888 states to 21888 states and 58372 transitions. [2021-06-05 21:13:02,236 INFO L78 Accepts]: Start accepts. Automaton has 21888 states and 58372 transitions. Word has length 65 [2021-06-05 21:13:02,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:02,236 INFO L482 AbstractCegarLoop]: Abstraction has 21888 states and 58372 transitions. [2021-06-05 21:13:02,236 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:02,236 INFO L276 IsEmpty]: Start isEmpty. Operand 21888 states and 58372 transitions. [2021-06-05 21:13:02,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 21:13:02,251 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:02,251 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:02,451 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1217,565 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:02,451 INFO L430 AbstractCegarLoop]: === Iteration 574 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:02,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:02,452 INFO L82 PathProgramCache]: Analyzing trace with hash 855335590, now seen corresponding path program 167 times [2021-06-05 21:13:02,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:02,452 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422523132] [2021-06-05 21:13:02,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:02,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:02,576 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 10 proven. 213 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:13:02,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:02,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422523132] [2021-06-05 21:13:02,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422523132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:02,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701234767] [2021-06-05 21:13:02,577 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 566 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 566 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:02,611 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-06-05 21:13:02,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:02,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 21:13:02,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:02,704 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 9 proven. 214 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:13:02,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701234767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:02,704 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:02,704 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:13:02,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122350045] [2021-06-05 21:13:02,704 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:13:02,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:02,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:13:02,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:13:02,704 INFO L87 Difference]: Start difference. First operand 21888 states and 58372 transitions. Second operand has 13 states, 13 states have (on average 5.0) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:03,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:03,370 INFO L93 Difference]: Finished difference Result 24640 states and 63599 transitions. [2021-06-05 21:13:03,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:13:03,370 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 21:13:03,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:03,401 INFO L225 Difference]: With dead ends: 24640 [2021-06-05 21:13:03,401 INFO L226 Difference]: Without dead ends: 24581 [2021-06-05 21:13:03,402 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 184.2ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:13:03,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24581 states. [2021-06-05 21:13:03,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24581 to 22019. [2021-06-05 21:13:03,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22019 states, 22018 states have (on average 2.66618221455173) internal successors, (58704), 22018 states have internal predecessors, (58704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:03,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22019 states to 22019 states and 58704 transitions. [2021-06-05 21:13:03,800 INFO L78 Accepts]: Start accepts. Automaton has 22019 states and 58704 transitions. Word has length 65 [2021-06-05 21:13:03,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:03,800 INFO L482 AbstractCegarLoop]: Abstraction has 22019 states and 58704 transitions. [2021-06-05 21:13:03,800 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:03,800 INFO L276 IsEmpty]: Start isEmpty. Operand 22019 states and 58704 transitions. [2021-06-05 21:13:03,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 21:13:03,819 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:03,820 INFO L554 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:04,043 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 566 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1220 [2021-06-05 21:13:04,043 INFO L430 AbstractCegarLoop]: === Iteration 575 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:04,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:04,043 INFO L82 PathProgramCache]: Analyzing trace with hash -698361267, now seen corresponding path program 349 times [2021-06-05 21:13:04,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:04,044 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466163849] [2021-06-05 21:13:04,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:04,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:04,118 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 105 proven. 118 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:13:04,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:04,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466163849] [2021-06-05 21:13:04,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466163849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:04,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212631045] [2021-06-05 21:13:04,119 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 567 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 567 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:04,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:04,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:13:04,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:04,241 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 105 proven. 118 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:13:04,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212631045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:04,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:04,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 21:13:04,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426167369] [2021-06-05 21:13:04,241 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:13:04,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:04,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:13:04,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:13:04,242 INFO L87 Difference]: Start difference. First operand 22019 states and 58704 transitions. Second operand has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 11 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:04,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:04,494 INFO L93 Difference]: Finished difference Result 25003 states and 63786 transitions. [2021-06-05 21:13:04,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:13:04,495 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 11 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 21:13:04,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:04,524 INFO L225 Difference]: With dead ends: 25003 [2021-06-05 21:13:04,525 INFO L226 Difference]: Without dead ends: 25000 [2021-06-05 21:13:04,525 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 67.1ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:13:04,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25000 states. [2021-06-05 21:13:04,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25000 to 21981. [2021-06-05 21:13:04,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21981 states, 21980 states have (on average 2.664649681528662) internal successors, (58569), 21980 states have internal predecessors, (58569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:04,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21981 states to 21981 states and 58569 transitions. [2021-06-05 21:13:04,862 INFO L78 Accepts]: Start accepts. Automaton has 21981 states and 58569 transitions. Word has length 65 [2021-06-05 21:13:04,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:04,862 INFO L482 AbstractCegarLoop]: Abstraction has 21981 states and 58569 transitions. [2021-06-05 21:13:04,862 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 11 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:04,862 INFO L276 IsEmpty]: Start isEmpty. Operand 21981 states and 58569 transitions. [2021-06-05 21:13:04,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 21:13:04,877 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:04,877 INFO L554 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:05,078 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 567 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1221 [2021-06-05 21:13:05,078 INFO L430 AbstractCegarLoop]: === Iteration 576 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:05,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:05,078 INFO L82 PathProgramCache]: Analyzing trace with hash -491298701, now seen corresponding path program 350 times [2021-06-05 21:13:05,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:05,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628465995] [2021-06-05 21:13:05,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:05,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:05,158 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 102 proven. 121 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:13:05,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:05,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628465995] [2021-06-05 21:13:05,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628465995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:05,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646453820] [2021-06-05 21:13:05,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 568 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 568 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:05,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:13:05,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:05,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:13:05,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:05,281 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 102 proven. 121 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:13:05,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646453820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:05,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:05,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-05 21:13:05,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606914452] [2021-06-05 21:13:05,282 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:13:05,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:05,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:13:05,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:13:05,282 INFO L87 Difference]: Start difference. First operand 21981 states and 58569 transitions. Second operand has 13 states, 13 states have (on average 4.769230769230769) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:05,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:05,530 INFO L93 Difference]: Finished difference Result 24995 states and 63690 transitions. [2021-06-05 21:13:05,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:13:05,531 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.769230769230769) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 21:13:05,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:05,565 INFO L225 Difference]: With dead ends: 24995 [2021-06-05 21:13:05,565 INFO L226 Difference]: Without dead ends: 24977 [2021-06-05 21:13:05,565 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 89.6ms TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:13:05,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24977 states. [2021-06-05 21:13:05,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24977 to 21595. [2021-06-05 21:13:05,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21595 states, 21594 states have (on average 2.658840418634806) internal successors, (57415), 21594 states have internal predecessors, (57415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:05,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21595 states to 21595 states and 57415 transitions. [2021-06-05 21:13:05,973 INFO L78 Accepts]: Start accepts. Automaton has 21595 states and 57415 transitions. Word has length 65 [2021-06-05 21:13:05,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:05,973 INFO L482 AbstractCegarLoop]: Abstraction has 21595 states and 57415 transitions. [2021-06-05 21:13:05,973 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.769230769230769) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:05,973 INFO L276 IsEmpty]: Start isEmpty. Operand 21595 states and 57415 transitions. [2021-06-05 21:13:05,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 21:13:05,989 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:05,989 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:06,189 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 568 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1223 [2021-06-05 21:13:06,189 INFO L430 AbstractCegarLoop]: === Iteration 577 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:06,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:06,190 INFO L82 PathProgramCache]: Analyzing trace with hash -1939298714, now seen corresponding path program 351 times [2021-06-05 21:13:06,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:06,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067509133] [2021-06-05 21:13:06,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:06,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:06,289 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 22 proven. 201 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:13:06,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:06,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067509133] [2021-06-05 21:13:06,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067509133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:06,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543529263] [2021-06-05 21:13:06,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 569 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 569 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:06,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-06-05 21:13:06,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:06,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 21:13:06,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:06,439 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 17 proven. 206 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:13:06,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543529263] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:06,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:06,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 21:13:06,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799174905] [2021-06-05 21:13:06,440 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:13:06,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:06,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:13:06,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:13:06,440 INFO L87 Difference]: Start difference. First operand 21595 states and 57415 transitions. Second operand has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 12 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:07,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:07,309 INFO L93 Difference]: Finished difference Result 23174 states and 60158 transitions. [2021-06-05 21:13:07,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:13:07,310 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 12 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 21:13:07,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:07,336 INFO L225 Difference]: With dead ends: 23174 [2021-06-05 21:13:07,337 INFO L226 Difference]: Without dead ends: 23136 [2021-06-05 21:13:07,337 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 175.2ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:13:07,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23136 states. [2021-06-05 21:13:07,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23136 to 21566. [2021-06-05 21:13:07,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21566 states, 21565 states have (on average 2.658567122652446) internal successors, (57332), 21565 states have internal predecessors, (57332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:07,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21566 states to 21566 states and 57332 transitions. [2021-06-05 21:13:07,677 INFO L78 Accepts]: Start accepts. Automaton has 21566 states and 57332 transitions. Word has length 65 [2021-06-05 21:13:07,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:07,677 INFO L482 AbstractCegarLoop]: Abstraction has 21566 states and 57332 transitions. [2021-06-05 21:13:07,677 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 12 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:07,677 INFO L276 IsEmpty]: Start isEmpty. Operand 21566 states and 57332 transitions. [2021-06-05 21:13:07,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 21:13:07,694 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:07,694 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:07,894 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 569 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1226 [2021-06-05 21:13:07,894 INFO L430 AbstractCegarLoop]: === Iteration 578 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:07,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:07,894 INFO L82 PathProgramCache]: Analyzing trace with hash 1742132402, now seen corresponding path program 352 times [2021-06-05 21:13:07,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:07,894 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387500618] [2021-06-05 21:13:07,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:07,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:07,999 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 19 proven. 202 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:13:07,999 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:08,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387500618] [2021-06-05 21:13:08,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387500618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:08,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593199324] [2021-06-05 21:13:08,000 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 570 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 570 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:08,029 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:13:08,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:08,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 21:13:08,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:08,122 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 203 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:13:08,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593199324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:08,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:08,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:13:08,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539775722] [2021-06-05 21:13:08,123 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:13:08,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:08,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:13:08,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:13:08,123 INFO L87 Difference]: Start difference. First operand 21566 states and 57332 transitions. Second operand has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:08,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:08,783 INFO L93 Difference]: Finished difference Result 23637 states and 61214 transitions. [2021-06-05 21:13:08,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:13:08,784 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 21:13:08,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:08,811 INFO L225 Difference]: With dead ends: 23637 [2021-06-05 21:13:08,811 INFO L226 Difference]: Without dead ends: 23625 [2021-06-05 21:13:08,811 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 170.4ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:13:08,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23625 states. [2021-06-05 21:13:09,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23625 to 21570. [2021-06-05 21:13:09,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21570 states, 21569 states have (on average 2.6583059019889657) internal successors, (57337), 21569 states have internal predecessors, (57337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:09,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21570 states to 21570 states and 57337 transitions. [2021-06-05 21:13:09,129 INFO L78 Accepts]: Start accepts. Automaton has 21570 states and 57337 transitions. Word has length 65 [2021-06-05 21:13:09,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:09,129 INFO L482 AbstractCegarLoop]: Abstraction has 21570 states and 57337 transitions. [2021-06-05 21:13:09,129 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:09,129 INFO L276 IsEmpty]: Start isEmpty. Operand 21570 states and 57337 transitions. [2021-06-05 21:13:09,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 21:13:09,144 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:09,144 INFO L554 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:09,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1227,570 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:09,345 INFO L430 AbstractCegarLoop]: === Iteration 579 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:09,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:09,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1584832915, now seen corresponding path program 168 times [2021-06-05 21:13:09,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:09,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234182424] [2021-06-05 21:13:09,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:09,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:09,431 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 111 proven. 115 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:13:09,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:09,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234182424] [2021-06-05 21:13:09,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234182424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:09,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584913406] [2021-06-05 21:13:09,431 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 571 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 571 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:09,464 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 21:13:09,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:09,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:13:09,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:09,708 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 113 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:09,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584913406] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:09,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:09,708 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 16 [2021-06-05 21:13:09,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700095258] [2021-06-05 21:13:09,708 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:13:09,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:09,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:13:09,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:13:09,709 INFO L87 Difference]: Start difference. First operand 21570 states and 57337 transitions. Second operand has 17 states, 17 states have (on average 4.588235294117647) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:09,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:09,974 INFO L93 Difference]: Finished difference Result 28789 states and 71294 transitions. [2021-06-05 21:13:09,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:13:09,975 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.588235294117647) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 21:13:09,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:10,011 INFO L225 Difference]: With dead ends: 28789 [2021-06-05 21:13:10,012 INFO L226 Difference]: Without dead ends: 28769 [2021-06-05 21:13:10,012 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 125.2ms TimeCoverageRelationStatistics Valid=139, Invalid=241, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:13:10,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28769 states. [2021-06-05 21:13:10,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28769 to 21641. [2021-06-05 21:13:10,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21641 states, 21640 states have (on average 2.6605822550831792) internal successors, (57575), 21640 states have internal predecessors, (57575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:10,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21641 states to 21641 states and 57575 transitions. [2021-06-05 21:13:10,352 INFO L78 Accepts]: Start accepts. Automaton has 21641 states and 57575 transitions. Word has length 65 [2021-06-05 21:13:10,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:10,352 INFO L482 AbstractCegarLoop]: Abstraction has 21641 states and 57575 transitions. [2021-06-05 21:13:10,352 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.588235294117647) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:10,352 INFO L276 IsEmpty]: Start isEmpty. Operand 21641 states and 57575 transitions. [2021-06-05 21:13:10,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 21:13:10,366 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:10,367 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:10,567 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 571 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1228 [2021-06-05 21:13:10,567 INFO L430 AbstractCegarLoop]: === Iteration 580 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:10,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:10,567 INFO L82 PathProgramCache]: Analyzing trace with hash -410917560, now seen corresponding path program 353 times [2021-06-05 21:13:10,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:10,567 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634546410] [2021-06-05 21:13:10,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:10,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:10,691 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 207 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:13:10,691 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:10,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634546410] [2021-06-05 21:13:10,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634546410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:10,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201797105] [2021-06-05 21:13:10,692 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 572 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 572 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:10,736 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-06-05 21:13:10,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:10,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 21:13:10,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:10,831 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 207 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:13:10,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201797105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:10,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:10,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 21:13:10,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774988198] [2021-06-05 21:13:10,832 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:13:10,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:10,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:13:10,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:13:10,832 INFO L87 Difference]: Start difference. First operand 21641 states and 57575 transitions. Second operand has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:11,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:11,602 INFO L93 Difference]: Finished difference Result 24593 states and 63329 transitions. [2021-06-05 21:13:11,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:13:11,602 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 21:13:11,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:11,632 INFO L225 Difference]: With dead ends: 24593 [2021-06-05 21:13:11,632 INFO L226 Difference]: Without dead ends: 24581 [2021-06-05 21:13:11,632 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 215.7ms TimeCoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:13:11,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24581 states. [2021-06-05 21:13:11,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24581 to 21673. [2021-06-05 21:13:11,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21673 states, 21672 states have (on average 2.6601605758582503) internal successors, (57651), 21672 states have internal predecessors, (57651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:11,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21673 states to 21673 states and 57651 transitions. [2021-06-05 21:13:11,946 INFO L78 Accepts]: Start accepts. Automaton has 21673 states and 57651 transitions. Word has length 65 [2021-06-05 21:13:11,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:11,946 INFO L482 AbstractCegarLoop]: Abstraction has 21673 states and 57651 transitions. [2021-06-05 21:13:11,946 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) [2021-06-05 21:13:11,946 INFO L276 IsEmpty]: Start isEmpty. Operand 21673 states and 57651 transitions. [2021-06-05 21:13:11,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 21:13:11,960 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:11,960 INFO L554 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:12,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 572 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1231 [2021-06-05 21:13:12,161 INFO L430 AbstractCegarLoop]: === Iteration 581 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:12,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:12,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1270859487, now seen corresponding path program 169 times [2021-06-05 21:13:12,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:12,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213210586] [2021-06-05 21:13:12,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:12,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:12,239 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 135 proven. 91 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:13:12,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:12,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213210586] [2021-06-05 21:13:12,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213210586] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:12,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664921942] [2021-06-05 21:13:12,239 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 573 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 573 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:12,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:12,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:13:12,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:12,370 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 136 proven. 91 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:13:12,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664921942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:12,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:12,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-06-05 21:13:12,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674157882] [2021-06-05 21:13:12,370 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:13:12,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:12,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:13:12,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:13:12,370 INFO L87 Difference]: Start difference. First operand 21673 states and 57651 transitions. Second operand has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:12,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:12,664 INFO L93 Difference]: Finished difference Result 31661 states and 78137 transitions. [2021-06-05 21:13:12,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:13:12,664 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 21:13:12,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:12,703 INFO L225 Difference]: With dead ends: 31661 [2021-06-05 21:13:12,703 INFO L226 Difference]: Without dead ends: 31661 [2021-06-05 21:13:12,704 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 89.4ms TimeCoverageRelationStatistics Valid=101, Invalid=139, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:13:12,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31661 states. [2021-06-05 21:13:13,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31661 to 21919. [2021-06-05 21:13:13,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21919 states, 21918 states have (on average 2.6655260516470483) internal successors, (58423), 21918 states have internal predecessors, (58423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:13,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21919 states to 21919 states and 58423 transitions. [2021-06-05 21:13:13,138 INFO L78 Accepts]: Start accepts. Automaton has 21919 states and 58423 transitions. Word has length 65 [2021-06-05 21:13:13,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:13,139 INFO L482 AbstractCegarLoop]: Abstraction has 21919 states and 58423 transitions. [2021-06-05 21:13:13,139 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:13,139 INFO L276 IsEmpty]: Start isEmpty. Operand 21919 states and 58423 transitions. [2021-06-05 21:13:13,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 21:13:13,153 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:13,153 INFO L554 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:13,353 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1232,573 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:13,353 INFO L430 AbstractCegarLoop]: === Iteration 582 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:13,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:13,353 INFO L82 PathProgramCache]: Analyzing trace with hash 1386535353, now seen corresponding path program 170 times [2021-06-05 21:13:13,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:13,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023412398] [2021-06-05 21:13:13,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:13,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:13,442 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 129 proven. 98 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:13:13,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:13,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023412398] [2021-06-05 21:13:13,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023412398] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:13,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705144622] [2021-06-05 21:13:13,442 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 574 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 574 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:13,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:13:13,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:13,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:13:13,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:13,576 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 130 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:13,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705144622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:13,576 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:13,576 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 14 [2021-06-05 21:13:13,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290005929] [2021-06-05 21:13:13,576 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:13:13,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:13,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:13:13,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:13:13,577 INFO L87 Difference]: Start difference. First operand 21919 states and 58423 transitions. Second operand has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:13,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:13,887 INFO L93 Difference]: Finished difference Result 29555 states and 73447 transitions. [2021-06-05 21:13:13,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:13:13,887 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 21:13:13,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:13,922 INFO L225 Difference]: With dead ends: 29555 [2021-06-05 21:13:13,922 INFO L226 Difference]: Without dead ends: 29555 [2021-06-05 21:13:13,923 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 108.3ms TimeCoverageRelationStatistics Valid=121, Invalid=185, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:13:13,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29555 states. [2021-06-05 21:13:14,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29555 to 21626. [2021-06-05 21:13:14,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21626 states, 21625 states have (on average 2.6610404624277457) internal successors, (57545), 21625 states have internal predecessors, (57545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:14,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21626 states to 21626 states and 57545 transitions. [2021-06-05 21:13:14,260 INFO L78 Accepts]: Start accepts. Automaton has 21626 states and 57545 transitions. Word has length 65 [2021-06-05 21:13:14,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:14,260 INFO L482 AbstractCegarLoop]: Abstraction has 21626 states and 57545 transitions. [2021-06-05 21:13:14,260 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:14,260 INFO L276 IsEmpty]: Start isEmpty. Operand 21626 states and 57545 transitions. [2021-06-05 21:13:14,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 21:13:14,274 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:14,274 INFO L554 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:14,474 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 574 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1233 [2021-06-05 21:13:14,475 INFO L430 AbstractCegarLoop]: === Iteration 583 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:14,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:14,475 INFO L82 PathProgramCache]: Analyzing trace with hash 1121641549, now seen corresponding path program 354 times [2021-06-05 21:13:14,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:14,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509251903] [2021-06-05 21:13:14,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:14,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:14,565 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 104 proven. 123 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:13:14,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:14,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509251903] [2021-06-05 21:13:14,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509251903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:14,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462175668] [2021-06-05 21:13:14,566 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 575 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 575 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:14,600 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 21:13:14,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:14,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:13:14,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:14,693 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 104 proven. 123 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:13:14,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462175668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:14,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:14,694 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-06-05 21:13:14,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312063440] [2021-06-05 21:13:14,694 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:13:14,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:14,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:13:14,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:13:14,694 INFO L87 Difference]: Start difference. First operand 21626 states and 57545 transitions. Second operand has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:14,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:14,963 INFO L93 Difference]: Finished difference Result 24366 states and 62196 transitions. [2021-06-05 21:13:14,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:13:14,963 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 21:13:14,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:14,990 INFO L225 Difference]: With dead ends: 24366 [2021-06-05 21:13:14,990 INFO L226 Difference]: Without dead ends: 24348 [2021-06-05 21:13:14,991 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 98.6ms TimeCoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:13:15,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24348 states. [2021-06-05 21:13:15,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24348 to 21626. [2021-06-05 21:13:15,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21626 states, 21625 states have (on average 2.660578034682081) internal successors, (57535), 21625 states have internal predecessors, (57535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:15,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21626 states to 21626 states and 57535 transitions. [2021-06-05 21:13:15,293 INFO L78 Accepts]: Start accepts. Automaton has 21626 states and 57535 transitions. Word has length 65 [2021-06-05 21:13:15,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:15,293 INFO L482 AbstractCegarLoop]: Abstraction has 21626 states and 57535 transitions. [2021-06-05 21:13:15,293 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:15,293 INFO L276 IsEmpty]: Start isEmpty. Operand 21626 states and 57535 transitions. [2021-06-05 21:13:15,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 21:13:15,307 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:15,307 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:15,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1234,575 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:15,508 INFO L430 AbstractCegarLoop]: === Iteration 584 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:15,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:15,508 INFO L82 PathProgramCache]: Analyzing trace with hash 1172605066, now seen corresponding path program 171 times [2021-06-05 21:13:15,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:15,508 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353196107] [2021-06-05 21:13:15,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:15,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:15,616 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 10 proven. 213 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:13:15,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:15,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353196107] [2021-06-05 21:13:15,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353196107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:15,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562180446] [2021-06-05 21:13:15,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 576 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 576 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:15,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-06-05 21:13:15,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:15,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 21:13:15,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:15,748 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 9 proven. 214 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:13:15,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562180446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:15,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:15,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:13:15,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850283398] [2021-06-05 21:13:15,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:13:15,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:15,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:13:15,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:13:15,749 INFO L87 Difference]: Start difference. First operand 21626 states and 57535 transitions. Second operand has 13 states, 13 states have (on average 5.0) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:16,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:16,391 INFO L93 Difference]: Finished difference Result 24595 states and 63247 transitions. [2021-06-05 21:13:16,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:13:16,391 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 21:13:16,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:16,420 INFO L225 Difference]: With dead ends: 24595 [2021-06-05 21:13:16,420 INFO L226 Difference]: Without dead ends: 24545 [2021-06-05 21:13:16,421 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 174.0ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:13:16,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24545 states. [2021-06-05 21:13:16,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24545 to 21849. [2021-06-05 21:13:16,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21849 states, 21848 states have (on average 2.659602709630172) internal successors, (58107), 21848 states have internal predecessors, (58107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:16,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21849 states to 21849 states and 58107 transitions. [2021-06-05 21:13:16,805 INFO L78 Accepts]: Start accepts. Automaton has 21849 states and 58107 transitions. Word has length 65 [2021-06-05 21:13:16,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:16,805 INFO L482 AbstractCegarLoop]: Abstraction has 21849 states and 58107 transitions. [2021-06-05 21:13:16,805 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:16,805 INFO L276 IsEmpty]: Start isEmpty. Operand 21849 states and 58107 transitions. [2021-06-05 21:13:16,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 21:13:16,819 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:16,819 INFO L554 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:17,019 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 576 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1238 [2021-06-05 21:13:17,019 INFO L430 AbstractCegarLoop]: === Iteration 585 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:17,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:17,019 INFO L82 PathProgramCache]: Analyzing trace with hash -381091791, now seen corresponding path program 355 times [2021-06-05 21:13:17,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:17,019 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857792396] [2021-06-05 21:13:17,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:17,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:17,089 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 89 proven. 134 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:13:17,089 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:17,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857792396] [2021-06-05 21:13:17,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857792396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:17,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078717652] [2021-06-05 21:13:17,089 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 577 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 577 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:17,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:17,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:13:17,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:17,208 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 89 proven. 134 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:13:17,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078717652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:17,208 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:17,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 21:13:17,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969193626] [2021-06-05 21:13:17,208 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:13:17,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:17,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:13:17,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:13:17,209 INFO L87 Difference]: Start difference. First operand 21849 states and 58107 transitions. Second operand has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 11 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:17,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:17,410 INFO L93 Difference]: Finished difference Result 25610 states and 64561 transitions. [2021-06-05 21:13:17,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:13:17,411 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 11 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 21:13:17,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:17,440 INFO L225 Difference]: With dead ends: 25610 [2021-06-05 21:13:17,440 INFO L226 Difference]: Without dead ends: 25607 [2021-06-05 21:13:17,441 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 61.1ms TimeCoverageRelationStatistics Valid=64, Invalid=92, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:13:17,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25607 states. [2021-06-05 21:13:17,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25607 to 21817. [2021-06-05 21:13:17,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21817 states, 21816 states have (on average 2.657957462412908) internal successors, (57986), 21816 states have internal predecessors, (57986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:17,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21817 states to 21817 states and 57986 transitions. [2021-06-05 21:13:17,767 INFO L78 Accepts]: Start accepts. Automaton has 21817 states and 57986 transitions. Word has length 65 [2021-06-05 21:13:17,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:17,767 INFO L482 AbstractCegarLoop]: Abstraction has 21817 states and 57986 transitions. [2021-06-05 21:13:17,767 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 11 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:17,767 INFO L276 IsEmpty]: Start isEmpty. Operand 21817 states and 57986 transitions. [2021-06-05 21:13:17,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 21:13:17,781 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:17,781 INFO L554 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:17,981 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1239,577 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:17,981 INFO L430 AbstractCegarLoop]: === Iteration 586 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:17,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:17,982 INFO L82 PathProgramCache]: Analyzing trace with hash -174029225, now seen corresponding path program 356 times [2021-06-05 21:13:17,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:17,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973458368] [2021-06-05 21:13:17,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:17,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:18,060 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 85 proven. 138 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:13:18,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:18,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973458368] [2021-06-05 21:13:18,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973458368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:18,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75299546] [2021-06-05 21:13:18,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 578 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 578 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:18,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:13:18,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:18,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:13:18,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:18,183 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 85 proven. 138 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:13:18,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75299546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:18,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:18,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-05 21:13:18,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935492643] [2021-06-05 21:13:18,184 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:13:18,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:18,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:13:18,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:13:18,184 INFO L87 Difference]: Start difference. First operand 21817 states and 57986 transitions. Second operand has 13 states, 13 states have (on average 4.769230769230769) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:18,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:18,453 INFO L93 Difference]: Finished difference Result 25614 states and 64489 transitions. [2021-06-05 21:13:18,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:13:18,454 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.769230769230769) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 21:13:18,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:18,485 INFO L225 Difference]: With dead ends: 25614 [2021-06-05 21:13:18,485 INFO L226 Difference]: Without dead ends: 25596 [2021-06-05 21:13:18,485 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 86.6ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:13:18,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25596 states. [2021-06-05 21:13:18,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25596 to 21817. [2021-06-05 21:13:18,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21817 states, 21816 states have (on average 2.6563989732306563) internal successors, (57952), 21816 states have internal predecessors, (57952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:18,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21817 states to 21817 states and 57952 transitions. [2021-06-05 21:13:18,816 INFO L78 Accepts]: Start accepts. Automaton has 21817 states and 57952 transitions. Word has length 65 [2021-06-05 21:13:18,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:18,816 INFO L482 AbstractCegarLoop]: Abstraction has 21817 states and 57952 transitions. [2021-06-05 21:13:18,816 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.769230769230769) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:18,816 INFO L276 IsEmpty]: Start isEmpty. Operand 21817 states and 57952 transitions. [2021-06-05 21:13:18,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 21:13:18,832 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:18,832 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:19,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1241,578 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:19,032 INFO L430 AbstractCegarLoop]: === Iteration 587 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:19,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:19,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1622029238, now seen corresponding path program 357 times [2021-06-05 21:13:19,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:19,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313407966] [2021-06-05 21:13:19,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:19,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:19,132 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 22 proven. 201 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:13:19,132 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:19,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313407966] [2021-06-05 21:13:19,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313407966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:19,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599821889] [2021-06-05 21:13:19,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 579 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 579 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:19,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-06-05 21:13:19,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:19,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 21:13:19,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:19,272 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 17 proven. 206 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:13:19,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599821889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:19,273 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:19,273 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 21:13:19,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066734879] [2021-06-05 21:13:19,273 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:13:19,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:19,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:13:19,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:13:19,273 INFO L87 Difference]: Start difference. First operand 21817 states and 57952 transitions. Second operand has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 12 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:20,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:20,127 INFO L93 Difference]: Finished difference Result 23463 states and 60807 transitions. [2021-06-05 21:13:20,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:13:20,127 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 12 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 21:13:20,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:20,152 INFO L225 Difference]: With dead ends: 23463 [2021-06-05 21:13:20,153 INFO L226 Difference]: Without dead ends: 23407 [2021-06-05 21:13:20,153 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 174.1ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:13:20,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23407 states. [2021-06-05 21:13:20,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23407 to 21785. [2021-06-05 21:13:20,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21785 states, 21784 states have (on average 2.6542875504957766) internal successors, (57821), 21784 states have internal predecessors, (57821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:20,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21785 states to 21785 states and 57821 transitions. [2021-06-05 21:13:20,527 INFO L78 Accepts]: Start accepts. Automaton has 21785 states and 57821 transitions. Word has length 65 [2021-06-05 21:13:20,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:20,527 INFO L482 AbstractCegarLoop]: Abstraction has 21785 states and 57821 transitions. [2021-06-05 21:13:20,527 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 12 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:20,527 INFO L276 IsEmpty]: Start isEmpty. Operand 21785 states and 57821 transitions. [2021-06-05 21:13:20,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 21:13:20,543 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:20,543 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:20,743 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 579 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1244 [2021-06-05 21:13:20,744 INFO L430 AbstractCegarLoop]: === Iteration 588 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:20,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:20,744 INFO L82 PathProgramCache]: Analyzing trace with hash 2059401878, now seen corresponding path program 358 times [2021-06-05 21:13:20,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:20,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455833273] [2021-06-05 21:13:20,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:20,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:20,850 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 19 proven. 202 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:13:20,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:20,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455833273] [2021-06-05 21:13:20,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455833273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:20,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563906191] [2021-06-05 21:13:20,851 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 580 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 580 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:20,880 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:13:20,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:20,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 21:13:20,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:20,974 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 203 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:13:20,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563906191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:20,974 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:20,974 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:13:20,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464954487] [2021-06-05 21:13:20,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:13:20,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:20,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:13:20,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:13:20,975 INFO L87 Difference]: Start difference. First operand 21785 states and 57821 transitions. Second operand has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:21,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:21,635 INFO L93 Difference]: Finished difference Result 24092 states and 62187 transitions. [2021-06-05 21:13:21,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:13:21,636 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 21:13:21,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:21,663 INFO L225 Difference]: With dead ends: 24092 [2021-06-05 21:13:21,663 INFO L226 Difference]: Without dead ends: 24080 [2021-06-05 21:13:21,663 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 172.1ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:13:21,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24080 states. [2021-06-05 21:13:21,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24080 to 21828. [2021-06-05 21:13:21,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21828 states, 21827 states have (on average 2.6531818390067348) internal successors, (57911), 21827 states have internal predecessors, (57911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:21,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21828 states to 21828 states and 57911 transitions. [2021-06-05 21:13:21,976 INFO L78 Accepts]: Start accepts. Automaton has 21828 states and 57911 transitions. Word has length 65 [2021-06-05 21:13:21,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:21,976 INFO L482 AbstractCegarLoop]: Abstraction has 21828 states and 57911 transitions. [2021-06-05 21:13:21,976 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:21,976 INFO L276 IsEmpty]: Start isEmpty. Operand 21828 states and 57911 transitions. [2021-06-05 21:13:21,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 21:13:21,990 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:21,990 INFO L554 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:22,190 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 580 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1245 [2021-06-05 21:13:22,190 INFO L430 AbstractCegarLoop]: === Iteration 589 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:22,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:22,191 INFO L82 PathProgramCache]: Analyzing trace with hash 1902102391, now seen corresponding path program 172 times [2021-06-05 21:13:22,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:22,191 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795632721] [2021-06-05 21:13:22,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:22,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:22,280 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 130 proven. 96 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:13:22,280 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:22,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795632721] [2021-06-05 21:13:22,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795632721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:22,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635118544] [2021-06-05 21:13:22,280 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 581 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 581 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:22,310 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:13:22,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:22,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:13:22,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:22,407 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 132 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:22,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635118544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:22,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:22,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-06-05 21:13:22,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531352292] [2021-06-05 21:13:22,408 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:13:22,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:22,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:13:22,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:13:22,408 INFO L87 Difference]: Start difference. First operand 21828 states and 57911 transitions. Second operand has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:22,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:22,691 INFO L93 Difference]: Finished difference Result 28795 states and 71587 transitions. [2021-06-05 21:13:22,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:13:22,691 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 21:13:22,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:22,725 INFO L225 Difference]: With dead ends: 28795 [2021-06-05 21:13:22,725 INFO L226 Difference]: Without dead ends: 28765 [2021-06-05 21:13:22,726 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 101.9ms TimeCoverageRelationStatistics Valid=104, Invalid=168, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:13:22,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28765 states. [2021-06-05 21:13:23,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28765 to 21897. [2021-06-05 21:13:23,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21897 states, 21896 states have (on average 2.6523565948118377) internal successors, (58076), 21896 states have internal predecessors, (58076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:23,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21897 states to 21897 states and 58076 transitions. [2021-06-05 21:13:23,057 INFO L78 Accepts]: Start accepts. Automaton has 21897 states and 58076 transitions. Word has length 65 [2021-06-05 21:13:23,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:23,057 INFO L482 AbstractCegarLoop]: Abstraction has 21897 states and 58076 transitions. [2021-06-05 21:13:23,057 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:23,057 INFO L276 IsEmpty]: Start isEmpty. Operand 21897 states and 58076 transitions. [2021-06-05 21:13:23,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 21:13:23,072 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:23,072 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:23,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1246,581 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:23,273 INFO L430 AbstractCegarLoop]: === Iteration 590 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:23,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:23,273 INFO L82 PathProgramCache]: Analyzing trace with hash -93648084, now seen corresponding path program 359 times [2021-06-05 21:13:23,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:23,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644813752] [2021-06-05 21:13:23,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:23,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:23,380 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 19 proven. 204 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:13:23,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:23,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644813752] [2021-06-05 21:13:23,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644813752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:23,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432097032] [2021-06-05 21:13:23,381 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 582 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 582 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:23,415 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-06-05 21:13:23,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:23,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 21:13:23,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:23,512 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 205 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:13:23,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432097032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:23,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:23,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 21:13:23,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119305355] [2021-06-05 21:13:23,513 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:13:23,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:23,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:13:23,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:13:23,513 INFO L87 Difference]: Start difference. First operand 21897 states and 58076 transitions. Second operand has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:24,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:24,375 INFO L93 Difference]: Finished difference Result 25821 states and 65999 transitions. [2021-06-05 21:13:24,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 21:13:24,375 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 21:13:24,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:24,404 INFO L225 Difference]: With dead ends: 25821 [2021-06-05 21:13:24,404 INFO L226 Difference]: Without dead ends: 25779 [2021-06-05 21:13:24,404 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 226.7ms TimeCoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:13:24,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25779 states. [2021-06-05 21:13:24,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25779 to 21985. [2021-06-05 21:13:24,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21985 states, 21984 states have (on average 2.652701965065502) internal successors, (58317), 21984 states have internal predecessors, (58317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:24,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21985 states to 21985 states and 58317 transitions. [2021-06-05 21:13:24,734 INFO L78 Accepts]: Start accepts. Automaton has 21985 states and 58317 transitions. Word has length 65 [2021-06-05 21:13:24,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:24,734 INFO L482 AbstractCegarLoop]: Abstraction has 21985 states and 58317 transitions. [2021-06-05 21:13:24,734 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:24,735 INFO L276 IsEmpty]: Start isEmpty. Operand 21985 states and 58317 transitions. [2021-06-05 21:13:24,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 21:13:24,754 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:24,754 INFO L554 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:24,954 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 582 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1249 [2021-06-05 21:13:24,955 INFO L430 AbstractCegarLoop]: === Iteration 591 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:24,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:24,955 INFO L82 PathProgramCache]: Analyzing trace with hash 1438911025, now seen corresponding path program 360 times [2021-06-05 21:13:24,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:24,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585893411] [2021-06-05 21:13:24,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:24,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:25,041 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 83 proven. 143 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:13:25,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:25,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585893411] [2021-06-05 21:13:25,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585893411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:25,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293179667] [2021-06-05 21:13:25,042 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 583 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 583 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:25,075 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 21:13:25,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:25,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:13:25,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:25,169 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 83 proven. 143 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:13:25,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293179667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:25,169 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:25,170 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-06-05 21:13:25,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944266774] [2021-06-05 21:13:25,170 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:13:25,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:25,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:13:25,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:13:25,170 INFO L87 Difference]: Start difference. First operand 21985 states and 58317 transitions. Second operand has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:25,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:25,438 INFO L93 Difference]: Finished difference Result 25751 states and 64746 transitions. [2021-06-05 21:13:25,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:13:25,452 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 21:13:25,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:25,493 INFO L225 Difference]: With dead ends: 25751 [2021-06-05 21:13:25,493 INFO L226 Difference]: Without dead ends: 25727 [2021-06-05 21:13:25,493 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 95.8ms TimeCoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:13:25,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25727 states. [2021-06-05 21:13:25,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25727 to 21464. [2021-06-05 21:13:25,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21464 states, 21463 states have (on average 2.6467409029492615) internal successors, (56807), 21463 states have internal predecessors, (56807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:25,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21464 states to 21464 states and 56807 transitions. [2021-06-05 21:13:25,830 INFO L78 Accepts]: Start accepts. Automaton has 21464 states and 56807 transitions. Word has length 65 [2021-06-05 21:13:25,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:25,830 INFO L482 AbstractCegarLoop]: Abstraction has 21464 states and 56807 transitions. [2021-06-05 21:13:25,831 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:25,831 INFO L276 IsEmpty]: Start isEmpty. Operand 21464 states and 56807 transitions. [2021-06-05 21:13:25,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 21:13:25,845 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:25,845 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:26,045 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 583 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1250 [2021-06-05 21:13:26,046 INFO L430 AbstractCegarLoop]: === Iteration 592 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:26,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:26,046 INFO L82 PathProgramCache]: Analyzing trace with hash 61188450, now seen corresponding path program 361 times [2021-06-05 21:13:26,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:26,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706303547] [2021-06-05 21:13:26,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:26,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:26,164 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 207 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:13:26,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:26,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706303547] [2021-06-05 21:13:26,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706303547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:26,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959236154] [2021-06-05 21:13:26,164 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 584 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 584 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:26,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:26,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 21:13:26,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:26,290 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 207 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:13:26,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959236154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:26,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:26,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:13:26,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888867620] [2021-06-05 21:13:26,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:13:26,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:26,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:13:26,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:13:26,290 INFO L87 Difference]: Start difference. First operand 21464 states and 56807 transitions. Second operand has 15 states, 15 states have (on average 4.4) internal successors, (66), 14 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:27,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:27,138 INFO L93 Difference]: Finished difference Result 26000 states and 65957 transitions. [2021-06-05 21:13:27,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:13:27,138 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.4) internal successors, (66), 14 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 21:13:27,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:27,169 INFO L225 Difference]: With dead ends: 26000 [2021-06-05 21:13:27,169 INFO L226 Difference]: Without dead ends: 25946 [2021-06-05 21:13:27,170 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 244.8ms TimeCoverageRelationStatistics Valid=94, Invalid=662, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:13:27,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25946 states. [2021-06-05 21:13:27,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25946 to 21403. [2021-06-05 21:13:27,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21403 states, 21402 states have (on average 2.6448462760489675) internal successors, (56605), 21402 states have internal predecessors, (56605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:27,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21403 states to 21403 states and 56605 transitions. [2021-06-05 21:13:27,511 INFO L78 Accepts]: Start accepts. Automaton has 21403 states and 56605 transitions. Word has length 65 [2021-06-05 21:13:27,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:27,511 INFO L482 AbstractCegarLoop]: Abstraction has 21403 states and 56605 transitions. [2021-06-05 21:13:27,511 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.4) internal successors, (66), 14 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:27,511 INFO L276 IsEmpty]: Start isEmpty. Operand 21403 states and 56605 transitions. [2021-06-05 21:13:27,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 21:13:27,526 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:27,526 INFO L554 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:27,726 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 584 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1254 [2021-06-05 21:13:27,727 INFO L430 AbstractCegarLoop]: === Iteration 593 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:27,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:27,727 INFO L82 PathProgramCache]: Analyzing trace with hash -798753477, now seen corresponding path program 173 times [2021-06-05 21:13:27,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:27,727 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604933968] [2021-06-05 21:13:27,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:27,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:27,804 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 154 proven. 72 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:13:27,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:27,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604933968] [2021-06-05 21:13:27,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604933968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:27,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136795689] [2021-06-05 21:13:27,804 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 585 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 585 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:27,839 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-06-05 21:13:27,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:27,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:13:27,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:28,109 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 156 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:28,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136795689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:28,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:28,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 21 [2021-06-05 21:13:28,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369533725] [2021-06-05 21:13:28,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:13:28,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:28,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:13:28,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=290, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:13:28,110 INFO L87 Difference]: Start difference. First operand 21403 states and 56605 transitions. Second operand has 22 states, 22 states have (on average 3.9545454545454546) internal successors, (87), 21 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:28,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:28,627 INFO L93 Difference]: Finished difference Result 34849 states and 85268 transitions. [2021-06-05 21:13:28,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:13:28,628 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.9545454545454546) internal successors, (87), 21 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 21:13:28,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:28,669 INFO L225 Difference]: With dead ends: 34849 [2021-06-05 21:13:28,669 INFO L226 Difference]: Without dead ends: 34849 [2021-06-05 21:13:28,669 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 217.7ms TimeCoverageRelationStatistics Valid=303, Invalid=453, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:13:28,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34849 states. [2021-06-05 21:13:29,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34849 to 21691. [2021-06-05 21:13:29,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21691 states, 21690 states have (on average 2.6503457814661133) internal successors, (57486), 21690 states have internal predecessors, (57486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:29,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21691 states to 21691 states and 57486 transitions. [2021-06-05 21:13:29,076 INFO L78 Accepts]: Start accepts. Automaton has 21691 states and 57486 transitions. Word has length 65 [2021-06-05 21:13:29,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:29,076 INFO L482 AbstractCegarLoop]: Abstraction has 21691 states and 57486 transitions. [2021-06-05 21:13:29,076 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.9545454545454546) internal successors, (87), 21 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:29,076 INFO L276 IsEmpty]: Start isEmpty. Operand 21691 states and 57486 transitions. [2021-06-05 21:13:29,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 21:13:29,091 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:29,091 INFO L554 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:29,291 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 585 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1255 [2021-06-05 21:13:29,292 INFO L430 AbstractCegarLoop]: === Iteration 594 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:29,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:29,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1858641363, now seen corresponding path program 174 times [2021-06-05 21:13:29,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:29,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291219244] [2021-06-05 21:13:29,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:29,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:29,377 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 149 proven. 77 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:13:29,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:29,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291219244] [2021-06-05 21:13:29,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291219244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:29,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044973571] [2021-06-05 21:13:29,377 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 586 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 586 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:29,428 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-06-05 21:13:29,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:29,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:13:29,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:29,533 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 150 proven. 77 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:13:29,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044973571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:29,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:29,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 14 [2021-06-05 21:13:29,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770213296] [2021-06-05 21:13:29,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:13:29,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:29,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:13:29,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:13:29,534 INFO L87 Difference]: Start difference. First operand 21691 states and 57486 transitions. Second operand has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:29,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:29,885 INFO L93 Difference]: Finished difference Result 33025 states and 80919 transitions. [2021-06-05 21:13:29,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:13:29,885 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 21:13:29,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:29,927 INFO L225 Difference]: With dead ends: 33025 [2021-06-05 21:13:29,927 INFO L226 Difference]: Without dead ends: 33025 [2021-06-05 21:13:29,927 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 120.9ms TimeCoverageRelationStatistics Valid=154, Invalid=226, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:13:29,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33025 states. [2021-06-05 21:13:30,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33025 to 21674. [2021-06-05 21:13:30,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21674 states, 21673 states have (on average 2.648964148941079) internal successors, (57411), 21673 states have internal predecessors, (57411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:30,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21674 states to 21674 states and 57411 transitions. [2021-06-05 21:13:30,304 INFO L78 Accepts]: Start accepts. Automaton has 21674 states and 57411 transitions. Word has length 65 [2021-06-05 21:13:30,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:30,304 INFO L482 AbstractCegarLoop]: Abstraction has 21674 states and 57411 transitions. [2021-06-05 21:13:30,305 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:30,305 INFO L276 IsEmpty]: Start isEmpty. Operand 21674 states and 57411 transitions. [2021-06-05 21:13:30,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 21:13:30,321 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:30,321 INFO L554 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:30,521 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 586 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1256 [2021-06-05 21:13:30,521 INFO L430 AbstractCegarLoop]: === Iteration 595 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:30,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:30,521 INFO L82 PathProgramCache]: Analyzing trace with hash 168646199, now seen corresponding path program 175 times [2021-06-05 21:13:30,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:30,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910282889] [2021-06-05 21:13:30,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:30,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:30,619 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 130 proven. 97 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:13:30,619 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:30,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910282889] [2021-06-05 21:13:30,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910282889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:30,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283729459] [2021-06-05 21:13:30,620 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 587 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 587 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:30,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:30,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:13:30,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:30,755 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 131 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:30,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283729459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:30,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:30,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 15 [2021-06-05 21:13:30,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619151608] [2021-06-05 21:13:30,755 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:13:30,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:30,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:13:30,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:13:30,755 INFO L87 Difference]: Start difference. First operand 21674 states and 57411 transitions. Second operand has 16 states, 16 states have (on average 4.3125) internal successors, (69), 15 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:31,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:31,058 INFO L93 Difference]: Finished difference Result 29232 states and 72460 transitions. [2021-06-05 21:13:31,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:13:31,058 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.3125) internal successors, (69), 15 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 21:13:31,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:31,090 INFO L225 Difference]: With dead ends: 29232 [2021-06-05 21:13:31,090 INFO L226 Difference]: Without dead ends: 29232 [2021-06-05 21:13:31,090 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 135.1ms TimeCoverageRelationStatistics Valid=161, Invalid=259, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:13:31,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29232 states. [2021-06-05 21:13:31,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29232 to 21133. [2021-06-05 21:13:31,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21133 states, 21132 states have (on average 2.6413496119629) internal successors, (55817), 21132 states have internal predecessors, (55817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:31,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21133 states to 21133 states and 55817 transitions. [2021-06-05 21:13:31,492 INFO L78 Accepts]: Start accepts. Automaton has 21133 states and 55817 transitions. Word has length 65 [2021-06-05 21:13:31,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:31,492 INFO L482 AbstractCegarLoop]: Abstraction has 21133 states and 55817 transitions. [2021-06-05 21:13:31,492 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.3125) internal successors, (69), 15 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:31,492 INFO L276 IsEmpty]: Start isEmpty. Operand 21133 states and 55817 transitions. [2021-06-05 21:13:31,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 21:13:31,507 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:31,507 INFO L554 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:31,707 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 587 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1257 [2021-06-05 21:13:31,708 INFO L430 AbstractCegarLoop]: === Iteration 596 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:31,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:31,708 INFO L82 PathProgramCache]: Analyzing trace with hash 447791127, now seen corresponding path program 362 times [2021-06-05 21:13:31,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:31,708 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964116069] [2021-06-05 21:13:31,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:31,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:31,803 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 88 proven. 139 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:13:31,803 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:31,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964116069] [2021-06-05 21:13:31,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964116069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:31,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200652571] [2021-06-05 21:13:31,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 588 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 588 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:31,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:13:31,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:31,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:13:31,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:31,927 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 88 proven. 139 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:13:31,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200652571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:31,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:31,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-05 21:13:31,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744394456] [2021-06-05 21:13:31,928 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:13:31,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:31,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:13:31,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:13:31,928 INFO L87 Difference]: Start difference. First operand 21133 states and 55817 transitions. Second operand has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 14 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:32,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:32,189 INFO L93 Difference]: Finished difference Result 24649 states and 61830 transitions. [2021-06-05 21:13:32,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:13:32,190 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 14 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 21:13:32,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:32,218 INFO L225 Difference]: With dead ends: 24649 [2021-06-05 21:13:32,219 INFO L226 Difference]: Without dead ends: 24622 [2021-06-05 21:13:32,219 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 114.6ms TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:13:32,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24622 states. [2021-06-05 21:13:32,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24622 to 21133. [2021-06-05 21:13:32,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21133 states, 21132 states have (on average 2.640781752791974) internal successors, (55805), 21132 states have internal predecessors, (55805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:32,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21133 states to 21133 states and 55805 transitions. [2021-06-05 21:13:32,508 INFO L78 Accepts]: Start accepts. Automaton has 21133 states and 55805 transitions. Word has length 65 [2021-06-05 21:13:32,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:32,508 INFO L482 AbstractCegarLoop]: Abstraction has 21133 states and 55805 transitions. [2021-06-05 21:13:32,508 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 14 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:32,508 INFO L276 IsEmpty]: Start isEmpty. Operand 21133 states and 55805 transitions. [2021-06-05 21:13:32,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 21:13:32,522 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:32,522 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:32,723 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1258,588 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:32,723 INFO L430 AbstractCegarLoop]: === Iteration 597 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:32,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:32,723 INFO L82 PathProgramCache]: Analyzing trace with hash -275453914, now seen corresponding path program 176 times [2021-06-05 21:13:32,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:32,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781475536] [2021-06-05 21:13:32,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:32,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:32,829 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 10 proven. 213 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:13:32,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:32,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781475536] [2021-06-05 21:13:32,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781475536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:32,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118959774] [2021-06-05 21:13:32,830 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 589 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 589 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:32,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:13:32,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:32,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 21:13:32,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:32,955 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 9 proven. 214 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:13:32,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118959774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:32,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:32,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:13:32,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474423743] [2021-06-05 21:13:32,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:13:32,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:32,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:13:32,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:13:32,956 INFO L87 Difference]: Start difference. First operand 21133 states and 55805 transitions. Second operand has 13 states, 13 states have (on average 5.0) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:33,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:33,622 INFO L93 Difference]: Finished difference Result 23655 states and 60711 transitions. [2021-06-05 21:13:33,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:13:33,622 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 21:13:33,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:33,648 INFO L225 Difference]: With dead ends: 23655 [2021-06-05 21:13:33,648 INFO L226 Difference]: Without dead ends: 23612 [2021-06-05 21:13:33,648 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 172.7ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:13:33,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23612 states. [2021-06-05 21:13:33,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23612 to 21337. [2021-06-05 21:13:33,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21337 states, 21336 states have (on average 2.6395763029621295) internal successors, (56318), 21336 states have internal predecessors, (56318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:33,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21337 states to 21337 states and 56318 transitions. [2021-06-05 21:13:33,949 INFO L78 Accepts]: Start accepts. Automaton has 21337 states and 56318 transitions. Word has length 65 [2021-06-05 21:13:33,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:33,950 INFO L482 AbstractCegarLoop]: Abstraction has 21337 states and 56318 transitions. [2021-06-05 21:13:33,950 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:33,950 INFO L276 IsEmpty]: Start isEmpty. Operand 21337 states and 56318 transitions. [2021-06-05 21:13:33,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 21:13:33,964 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:33,965 INFO L554 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:34,165 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1263,589 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:34,165 INFO L430 AbstractCegarLoop]: === Iteration 598 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:34,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:34,165 INFO L82 PathProgramCache]: Analyzing trace with hash -1829150771, now seen corresponding path program 363 times [2021-06-05 21:13:34,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:34,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937826259] [2021-06-05 21:13:34,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:34,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:34,233 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 79 proven. 144 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:13:34,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:34,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937826259] [2021-06-05 21:13:34,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937826259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:34,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996279627] [2021-06-05 21:13:34,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 590 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 590 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:34,268 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-06-05 21:13:34,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:34,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:13:34,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:34,360 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 79 proven. 144 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:13:34,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996279627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:34,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:34,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 21:13:34,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137840350] [2021-06-05 21:13:34,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:13:34,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:34,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:13:34,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:13:34,361 INFO L87 Difference]: Start difference. First operand 21337 states and 56318 transitions. Second operand has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 11 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:34,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:34,587 INFO L93 Difference]: Finished difference Result 25552 states and 63612 transitions. [2021-06-05 21:13:34,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:13:34,587 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 11 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 21:13:34,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:34,616 INFO L225 Difference]: With dead ends: 25552 [2021-06-05 21:13:34,616 INFO L226 Difference]: Without dead ends: 25549 [2021-06-05 21:13:34,616 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 61.1ms TimeCoverageRelationStatistics Valid=65, Invalid=91, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:13:34,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25549 states. [2021-06-05 21:13:34,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25549 to 21311. [2021-06-05 21:13:35,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21311 states, 21310 states have (on average 2.638198029094322) internal successors, (56220), 21310 states have internal predecessors, (56220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:35,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21311 states to 21311 states and 56220 transitions. [2021-06-05 21:13:35,041 INFO L78 Accepts]: Start accepts. Automaton has 21311 states and 56220 transitions. Word has length 65 [2021-06-05 21:13:35,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:35,041 INFO L482 AbstractCegarLoop]: Abstraction has 21311 states and 56220 transitions. [2021-06-05 21:13:35,041 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 11 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:35,041 INFO L276 IsEmpty]: Start isEmpty. Operand 21311 states and 56220 transitions. [2021-06-05 21:13:35,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 21:13:35,056 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:35,056 INFO L554 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:35,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 590 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1264 [2021-06-05 21:13:35,257 INFO L430 AbstractCegarLoop]: === Iteration 599 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:35,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:35,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1622088205, now seen corresponding path program 364 times [2021-06-05 21:13:35,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:35,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470229425] [2021-06-05 21:13:35,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:35,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:35,332 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 74 proven. 149 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:13:35,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:35,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470229425] [2021-06-05 21:13:35,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470229425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:35,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562761218] [2021-06-05 21:13:35,333 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 591 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 591 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:35,362 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:13:35,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:35,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:13:35,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:35,456 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 74 proven. 149 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:13:35,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562761218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:35,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:35,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-05 21:13:35,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935756515] [2021-06-05 21:13:35,457 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:13:35,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:35,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:13:35,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:13:35,457 INFO L87 Difference]: Start difference. First operand 21311 states and 56220 transitions. Second operand has 13 states, 13 states have (on average 4.769230769230769) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:35,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:35,743 INFO L93 Difference]: Finished difference Result 25562 states and 63563 transitions. [2021-06-05 21:13:35,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:13:35,744 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.769230769230769) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 21:13:35,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:35,774 INFO L225 Difference]: With dead ends: 25562 [2021-06-05 21:13:35,774 INFO L226 Difference]: Without dead ends: 25544 [2021-06-05 21:13:35,776 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 84.9ms TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:13:35,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25544 states. [2021-06-05 21:13:36,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25544 to 21311. [2021-06-05 21:13:36,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21311 states, 21310 states have (on average 2.6368840919755985) internal successors, (56192), 21310 states have internal predecessors, (56192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:36,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21311 states to 21311 states and 56192 transitions. [2021-06-05 21:13:36,089 INFO L78 Accepts]: Start accepts. Automaton has 21311 states and 56192 transitions. Word has length 65 [2021-06-05 21:13:36,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:36,089 INFO L482 AbstractCegarLoop]: Abstraction has 21311 states and 56192 transitions. [2021-06-05 21:13:36,090 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.769230769230769) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:36,090 INFO L276 IsEmpty]: Start isEmpty. Operand 21311 states and 56192 transitions. [2021-06-05 21:13:36,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 21:13:36,104 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:36,104 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:36,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 591 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1266 [2021-06-05 21:13:36,304 INFO L430 AbstractCegarLoop]: === Iteration 600 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:36,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:36,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1224879078, now seen corresponding path program 365 times [2021-06-05 21:13:36,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:36,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306989559] [2021-06-05 21:13:36,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:36,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:36,414 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 22 proven. 201 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:13:36,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:36,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306989559] [2021-06-05 21:13:36,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306989559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:36,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902578612] [2021-06-05 21:13:36,414 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 592 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 592 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:36,449 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-06-05 21:13:36,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:36,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 21:13:36,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:36,556 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 17 proven. 206 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:13:36,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902578612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:36,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:36,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 21:13:36,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97702528] [2021-06-05 21:13:36,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:13:36,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:36,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:13:36,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:13:36,557 INFO L87 Difference]: Start difference. First operand 21311 states and 56192 transitions. Second operand has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 12 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:37,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:37,472 INFO L93 Difference]: Finished difference Result 22721 states and 58670 transitions. [2021-06-05 21:13:37,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:13:37,472 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 12 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 21:13:37,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:37,495 INFO L225 Difference]: With dead ends: 22721 [2021-06-05 21:13:37,496 INFO L226 Difference]: Without dead ends: 22647 [2021-06-05 21:13:37,496 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 179.6ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:13:37,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22647 states. [2021-06-05 21:13:37,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22647 to 21285. [2021-06-05 21:13:37,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21285 states, 21284 states have (on average 2.6344202217628268) internal successors, (56071), 21284 states have internal predecessors, (56071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:37,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21285 states to 21285 states and 56071 transitions. [2021-06-05 21:13:37,798 INFO L78 Accepts]: Start accepts. Automaton has 21285 states and 56071 transitions. Word has length 65 [2021-06-05 21:13:37,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:37,798 INFO L482 AbstractCegarLoop]: Abstraction has 21285 states and 56071 transitions. [2021-06-05 21:13:37,798 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 12 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:37,799 INFO L276 IsEmpty]: Start isEmpty. Operand 21285 states and 56071 transitions. [2021-06-05 21:13:37,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 21:13:37,812 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:37,812 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:38,013 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 592 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1269 [2021-06-05 21:13:38,013 INFO L430 AbstractCegarLoop]: === Iteration 601 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:38,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:38,013 INFO L82 PathProgramCache]: Analyzing trace with hash 611342898, now seen corresponding path program 366 times [2021-06-05 21:13:38,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:38,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152821826] [2021-06-05 21:13:38,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:38,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:38,123 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 19 proven. 202 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:13:38,123 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:38,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152821826] [2021-06-05 21:13:38,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152821826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:38,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190527407] [2021-06-05 21:13:38,123 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 593 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 593 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:38,158 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-06-05 21:13:38,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:38,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 21:13:38,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:38,254 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 203 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:13:38,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190527407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:38,254 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:38,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:13:38,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546236623] [2021-06-05 21:13:38,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:13:38,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:38,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:13:38,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:13:38,255 INFO L87 Difference]: Start difference. First operand 21285 states and 56071 transitions. Second operand has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:38,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:38,905 INFO L93 Difference]: Finished difference Result 23377 states and 60094 transitions. [2021-06-05 21:13:38,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:13:38,905 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 21:13:38,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:38,930 INFO L225 Difference]: With dead ends: 23377 [2021-06-05 21:13:38,930 INFO L226 Difference]: Without dead ends: 23365 [2021-06-05 21:13:38,931 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 174.8ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:13:38,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23365 states. [2021-06-05 21:13:39,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23365 to 21337. [2021-06-05 21:13:39,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21337 states, 21336 states have (on average 2.6334364454443193) internal successors, (56187), 21336 states have internal predecessors, (56187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:39,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21337 states to 21337 states and 56187 transitions. [2021-06-05 21:13:39,277 INFO L78 Accepts]: Start accepts. Automaton has 21337 states and 56187 transitions. Word has length 65 [2021-06-05 21:13:39,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:39,277 INFO L482 AbstractCegarLoop]: Abstraction has 21337 states and 56187 transitions. [2021-06-05 21:13:39,277 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:39,277 INFO L276 IsEmpty]: Start isEmpty. Operand 21337 states and 56187 transitions. [2021-06-05 21:13:39,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 21:13:39,292 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:39,292 INFO L554 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:39,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1270,593 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:39,492 INFO L430 AbstractCegarLoop]: === Iteration 602 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:39,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:39,492 INFO L82 PathProgramCache]: Analyzing trace with hash 454043411, now seen corresponding path program 177 times [2021-06-05 21:13:39,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:39,492 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680267473] [2021-06-05 21:13:39,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:39,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:39,568 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 143 proven. 83 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:13:39,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:39,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680267473] [2021-06-05 21:13:39,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680267473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:39,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593742105] [2021-06-05 21:13:39,568 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 594 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 594 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:39,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-06-05 21:13:39,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:39,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:13:39,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:39,703 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 145 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:39,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593742105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:39,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:39,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-06-05 21:13:39,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2281724] [2021-06-05 21:13:39,703 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:13:39,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:39,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:13:39,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:13:39,704 INFO L87 Difference]: Start difference. First operand 21337 states and 56187 transitions. Second operand has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:39,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:39,983 INFO L93 Difference]: Finished difference Result 27785 states and 69129 transitions. [2021-06-05 21:13:39,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:13:39,983 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 21:13:39,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:40,017 INFO L225 Difference]: With dead ends: 27785 [2021-06-05 21:13:40,017 INFO L226 Difference]: Without dead ends: 27755 [2021-06-05 21:13:40,018 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 90.5ms TimeCoverageRelationStatistics Valid=102, Invalid=170, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:13:40,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27755 states. [2021-06-05 21:13:40,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27755 to 21784. [2021-06-05 21:13:40,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21784 states, 21783 states have (on average 2.6391681586558327) internal successors, (57489), 21783 states have internal predecessors, (57489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:40,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21784 states to 21784 states and 57489 transitions. [2021-06-05 21:13:40,353 INFO L78 Accepts]: Start accepts. Automaton has 21784 states and 57489 transitions. Word has length 65 [2021-06-05 21:13:40,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:40,353 INFO L482 AbstractCegarLoop]: Abstraction has 21784 states and 57489 transitions. [2021-06-05 21:13:40,353 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:40,353 INFO L276 IsEmpty]: Start isEmpty. Operand 21784 states and 57489 transitions. [2021-06-05 21:13:40,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 21:13:40,367 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:40,367 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:40,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1271,594 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:40,568 INFO L430 AbstractCegarLoop]: === Iteration 603 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:40,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:40,568 INFO L82 PathProgramCache]: Analyzing trace with hash -1541707064, now seen corresponding path program 367 times [2021-06-05 21:13:40,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:40,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864954100] [2021-06-05 21:13:40,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:40,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:40,691 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 19 proven. 204 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:13:40,691 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:40,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864954100] [2021-06-05 21:13:40,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864954100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:40,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65624426] [2021-06-05 21:13:40,692 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 595 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 595 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:40,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:40,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 21:13:40,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:40,843 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 205 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:13:40,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65624426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:40,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:40,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 21:13:40,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36267544] [2021-06-05 21:13:40,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:13:40,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:40,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:13:40,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:13:40,844 INFO L87 Difference]: Start difference. First operand 21784 states and 57489 transitions. Second operand has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:41,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:41,715 INFO L93 Difference]: Finished difference Result 25899 states and 65956 transitions. [2021-06-05 21:13:41,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 21:13:41,716 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 21:13:41,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:41,746 INFO L225 Difference]: With dead ends: 25899 [2021-06-05 21:13:41,746 INFO L226 Difference]: Without dead ends: 25845 [2021-06-05 21:13:41,746 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 270.0ms TimeCoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:13:41,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25845 states. [2021-06-05 21:13:42,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25845 to 21962. [2021-06-05 21:13:42,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21962 states, 21961 states have (on average 2.6392240790492236) internal successors, (57960), 21961 states have internal predecessors, (57960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:42,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21962 states to 21962 states and 57960 transitions. [2021-06-05 21:13:42,057 INFO L78 Accepts]: Start accepts. Automaton has 21962 states and 57960 transitions. Word has length 65 [2021-06-05 21:13:42,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:42,057 INFO L482 AbstractCegarLoop]: Abstraction has 21962 states and 57960 transitions. [2021-06-05 21:13:42,057 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:42,057 INFO L276 IsEmpty]: Start isEmpty. Operand 21962 states and 57960 transitions. [2021-06-05 21:13:42,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 21:13:42,071 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:42,071 INFO L554 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:42,271 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1274,595 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:42,271 INFO L430 AbstractCegarLoop]: === Iteration 604 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:42,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:42,271 INFO L82 PathProgramCache]: Analyzing trace with hash -9147955, now seen corresponding path program 368 times [2021-06-05 21:13:42,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:42,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83337226] [2021-06-05 21:13:42,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:42,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:42,355 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 69 proven. 157 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:13:42,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:42,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83337226] [2021-06-05 21:13:42,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83337226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:42,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142589498] [2021-06-05 21:13:42,355 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 596 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 596 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:42,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:13:42,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:42,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:13:42,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:42,477 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 69 proven. 157 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:13:42,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142589498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:42,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:42,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-06-05 21:13:42,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120270207] [2021-06-05 21:13:42,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:13:42,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:42,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:13:42,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:13:42,478 INFO L87 Difference]: Start difference. First operand 21962 states and 57960 transitions. Second operand has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:42,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:42,715 INFO L93 Difference]: Finished difference Result 26218 states and 65296 transitions. [2021-06-05 21:13:42,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:13:42,715 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 21:13:42,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:42,744 INFO L225 Difference]: With dead ends: 26218 [2021-06-05 21:13:42,744 INFO L226 Difference]: Without dead ends: 26194 [2021-06-05 21:13:42,745 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 92.9ms TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:13:42,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26194 states. [2021-06-05 21:13:43,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26194 to 21962. [2021-06-05 21:13:43,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21962 states, 21961 states have (on average 2.63844997950913) internal successors, (57943), 21961 states have internal predecessors, (57943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:43,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21962 states to 21962 states and 57943 transitions. [2021-06-05 21:13:43,113 INFO L78 Accepts]: Start accepts. Automaton has 21962 states and 57943 transitions. Word has length 65 [2021-06-05 21:13:43,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:43,114 INFO L482 AbstractCegarLoop]: Abstraction has 21962 states and 57943 transitions. [2021-06-05 21:13:43,114 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:43,114 INFO L276 IsEmpty]: Start isEmpty. Operand 21962 states and 57943 transitions. [2021-06-05 21:13:43,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 21:13:43,128 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:43,129 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:43,329 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 596 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1275 [2021-06-05 21:13:43,329 INFO L430 AbstractCegarLoop]: === Iteration 605 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:43,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:43,329 INFO L82 PathProgramCache]: Analyzing trace with hash -1386870530, now seen corresponding path program 369 times [2021-06-05 21:13:43,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:43,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921074378] [2021-06-05 21:13:43,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:43,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:43,447 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 19 proven. 204 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:13:43,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:43,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921074378] [2021-06-05 21:13:43,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921074378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:43,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78070383] [2021-06-05 21:13:43,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 597 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 597 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:43,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-06-05 21:13:43,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:43,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 21:13:43,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:43,578 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 205 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:13:43,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78070383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:43,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:43,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:13:43,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307885185] [2021-06-05 21:13:43,579 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:13:43,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:43,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:13:43,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:13:43,579 INFO L87 Difference]: Start difference. First operand 21962 states and 57943 transitions. Second operand has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 14 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:44,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:44,652 INFO L93 Difference]: Finished difference Result 29175 states and 73161 transitions. [2021-06-05 21:13:44,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 21:13:44,652 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 14 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 21:13:44,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:44,689 INFO L225 Difference]: With dead ends: 29175 [2021-06-05 21:13:44,689 INFO L226 Difference]: Without dead ends: 29061 [2021-06-05 21:13:44,689 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 385.1ms TimeCoverageRelationStatistics Valid=189, Invalid=1451, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 21:13:44,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29061 states. [2021-06-05 21:13:44,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29061 to 22155. [2021-06-05 21:13:45,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22155 states, 22154 states have (on average 2.638665703710391) internal successors, (58457), 22154 states have internal predecessors, (58457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:45,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22155 states to 22155 states and 58457 transitions. [2021-06-05 21:13:45,059 INFO L78 Accepts]: Start accepts. Automaton has 22155 states and 58457 transitions. Word has length 65 [2021-06-05 21:13:45,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:45,059 INFO L482 AbstractCegarLoop]: Abstraction has 22155 states and 58457 transitions. [2021-06-05 21:13:45,059 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 14 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:45,059 INFO L276 IsEmpty]: Start isEmpty. Operand 22155 states and 58457 transitions. [2021-06-05 21:13:45,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 21:13:45,075 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:45,075 INFO L554 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:45,275 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 597 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1279 [2021-06-05 21:13:45,275 INFO L430 AbstractCegarLoop]: === Iteration 606 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:45,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:45,276 INFO L82 PathProgramCache]: Analyzing trace with hash -1000267853, now seen corresponding path program 370 times [2021-06-05 21:13:45,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:45,276 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832860042] [2021-06-05 21:13:45,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:45,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:45,385 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 70 proven. 156 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:13:45,385 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:45,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832860042] [2021-06-05 21:13:45,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832860042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:45,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45226922] [2021-06-05 21:13:45,385 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 598 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 598 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:45,414 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:13:45,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:45,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:13:45,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:45,508 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 70 proven. 156 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:13:45,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45226922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:45,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:45,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-05 21:13:45,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879567235] [2021-06-05 21:13:45,509 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:13:45,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:45,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:13:45,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:13:45,509 INFO L87 Difference]: Start difference. First operand 22155 states and 58457 transitions. Second operand has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 14 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:45,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:45,823 INFO L93 Difference]: Finished difference Result 26448 states and 65859 transitions. [2021-06-05 21:13:45,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:13:45,823 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 14 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 21:13:45,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:45,854 INFO L225 Difference]: With dead ends: 26448 [2021-06-05 21:13:45,854 INFO L226 Difference]: Without dead ends: 26415 [2021-06-05 21:13:45,855 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 123.8ms TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:13:45,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26415 states. [2021-06-05 21:13:46,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26415 to 21652. [2021-06-05 21:13:46,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21652 states, 21651 states have (on average 2.6335504133758256) internal successors, (57019), 21651 states have internal predecessors, (57019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:46,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21652 states to 21652 states and 57019 transitions. [2021-06-05 21:13:46,190 INFO L78 Accepts]: Start accepts. Automaton has 21652 states and 57019 transitions. Word has length 65 [2021-06-05 21:13:46,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:46,190 INFO L482 AbstractCegarLoop]: Abstraction has 21652 states and 57019 transitions. [2021-06-05 21:13:46,190 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 14 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:46,190 INFO L276 IsEmpty]: Start isEmpty. Operand 21652 states and 57019 transitions. [2021-06-05 21:13:46,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 21:13:46,206 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:46,206 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:46,406 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1280,598 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:46,406 INFO L430 AbstractCegarLoop]: === Iteration 607 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:46,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:46,406 INFO L82 PathProgramCache]: Analyzing trace with hash -1446562040, now seen corresponding path program 371 times [2021-06-05 21:13:46,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:46,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129237593] [2021-06-05 21:13:46,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:46,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:46,655 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 207 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:13:46,655 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:46,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129237593] [2021-06-05 21:13:46,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129237593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:46,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693201491] [2021-06-05 21:13:46,656 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 599 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 599 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:46,692 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-06-05 21:13:46,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:46,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 21:13:46,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:46,787 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 207 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:13:46,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693201491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:46,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:46,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 21:13:46,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888904840] [2021-06-05 21:13:46,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:13:46,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:46,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:13:46,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:13:46,788 INFO L87 Difference]: Start difference. First operand 21652 states and 57019 transitions. Second operand has 16 states, 16 states have (on average 4.125) internal successors, (66), 15 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:47,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:47,725 INFO L93 Difference]: Finished difference Result 27644 states and 69399 transitions. [2021-06-05 21:13:47,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:13:47,725 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.125) internal successors, (66), 15 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 21:13:47,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:47,758 INFO L225 Difference]: With dead ends: 27644 [2021-06-05 21:13:47,758 INFO L226 Difference]: Without dead ends: 27488 [2021-06-05 21:13:47,758 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 406.5ms TimeCoverageRelationStatistics Valid=119, Invalid=811, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:13:47,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27488 states. [2021-06-05 21:13:48,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27488 to 21271. [2021-06-05 21:13:48,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21271 states, 21270 states have (on average 2.630747531734838) internal successors, (55956), 21270 states have internal predecessors, (55956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:48,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21271 states to 21271 states and 55956 transitions. [2021-06-05 21:13:48,090 INFO L78 Accepts]: Start accepts. Automaton has 21271 states and 55956 transitions. Word has length 65 [2021-06-05 21:13:48,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:48,090 INFO L482 AbstractCegarLoop]: Abstraction has 21271 states and 55956 transitions. [2021-06-05 21:13:48,090 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.125) internal successors, (66), 15 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:48,090 INFO L276 IsEmpty]: Start isEmpty. Operand 21271 states and 55956 transitions. [2021-06-05 21:13:48,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 21:13:48,105 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:48,105 INFO L554 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:48,305 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1285,599 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:48,306 INFO L430 AbstractCegarLoop]: === Iteration 608 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:48,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:48,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1988463329, now seen corresponding path program 178 times [2021-06-05 21:13:48,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:48,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944007074] [2021-06-05 21:13:48,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:48,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:48,385 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 167 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:13:48,385 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:48,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944007074] [2021-06-05 21:13:48,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944007074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:48,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787982532] [2021-06-05 21:13:48,385 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 600 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 600 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:48,414 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:13:48,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:48,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:13:48,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:48,514 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 168 proven. 59 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:13:48,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787982532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:48,514 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:48,514 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-06-05 21:13:48,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212226500] [2021-06-05 21:13:48,515 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:13:48,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:48,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:13:48,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=107, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:13:48,515 INFO L87 Difference]: Start difference. First operand 21271 states and 55956 transitions. Second operand has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:48,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:48,825 INFO L93 Difference]: Finished difference Result 33905 states and 83190 transitions. [2021-06-05 21:13:48,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:13:48,825 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 21:13:48,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:48,862 INFO L225 Difference]: With dead ends: 33905 [2021-06-05 21:13:48,862 INFO L226 Difference]: Without dead ends: 33905 [2021-06-05 21:13:48,863 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 103.9ms TimeCoverageRelationStatistics Valid=131, Invalid=175, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:13:48,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33905 states. [2021-06-05 21:13:49,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33905 to 21594. [2021-06-05 21:13:49,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21594 states, 21593 states have (on average 2.637567730282962) internal successors, (56953), 21593 states have internal predecessors, (56953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:49,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21594 states to 21594 states and 56953 transitions. [2021-06-05 21:13:49,209 INFO L78 Accepts]: Start accepts. Automaton has 21594 states and 56953 transitions. Word has length 65 [2021-06-05 21:13:49,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:49,209 INFO L482 AbstractCegarLoop]: Abstraction has 21594 states and 56953 transitions. [2021-06-05 21:13:49,209 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:49,209 INFO L276 IsEmpty]: Start isEmpty. Operand 21594 states and 56953 transitions. [2021-06-05 21:13:49,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 21:13:49,223 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:49,223 INFO L554 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:49,423 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 600 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1286 [2021-06-05 21:13:49,424 INFO L430 AbstractCegarLoop]: === Iteration 609 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:49,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:49,424 INFO L82 PathProgramCache]: Analyzing trace with hash 350890873, now seen corresponding path program 179 times [2021-06-05 21:13:49,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:49,424 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525067652] [2021-06-05 21:13:49,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:49,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:49,509 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 163 proven. 63 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:13:49,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:49,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525067652] [2021-06-05 21:13:49,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525067652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:49,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435062516] [2021-06-05 21:13:49,509 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 601 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 601 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:49,550 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-06-05 21:13:49,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:49,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:13:49,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:49,749 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 165 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:49,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435062516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:49,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:49,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20] total 23 [2021-06-05 21:13:49,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128347311] [2021-06-05 21:13:49,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 21:13:49,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:49,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 21:13:49,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=367, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:13:49,750 INFO L87 Difference]: Start difference. First operand 21594 states and 56953 transitions. Second operand has 24 states, 24 states have (on average 3.75) internal successors, (90), 23 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:50,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:50,351 INFO L93 Difference]: Finished difference Result 37416 states and 91139 transitions. [2021-06-05 21:13:50,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 21:13:50,352 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.75) internal successors, (90), 23 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 21:13:50,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:50,399 INFO L225 Difference]: With dead ends: 37416 [2021-06-05 21:13:50,399 INFO L226 Difference]: Without dead ends: 37416 [2021-06-05 21:13:50,399 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 334.1ms TimeCoverageRelationStatistics Valid=476, Invalid=784, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 21:13:50,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37416 states. [2021-06-05 21:13:50,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37416 to 21628. [2021-06-05 21:13:50,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21628 states, 21627 states have (on average 2.6370277893374023) internal successors, (57031), 21627 states have internal predecessors, (57031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:50,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21628 states to 21628 states and 57031 transitions. [2021-06-05 21:13:50,851 INFO L78 Accepts]: Start accepts. Automaton has 21628 states and 57031 transitions. Word has length 65 [2021-06-05 21:13:50,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:50,851 INFO L482 AbstractCegarLoop]: Abstraction has 21628 states and 57031 transitions. [2021-06-05 21:13:50,851 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 3.75) internal successors, (90), 23 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:50,852 INFO L276 IsEmpty]: Start isEmpty. Operand 21628 states and 57031 transitions. [2021-06-05 21:13:50,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 21:13:50,866 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:50,866 INFO L554 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:51,066 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 601 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1287 [2021-06-05 21:13:51,066 INFO L430 AbstractCegarLoop]: === Iteration 610 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:51,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:51,066 INFO L82 PathProgramCache]: Analyzing trace with hash -1339104291, now seen corresponding path program 180 times [2021-06-05 21:13:51,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:51,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78371713] [2021-06-05 21:13:51,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:51,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:51,162 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 147 proven. 79 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:13:51,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:51,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78371713] [2021-06-05 21:13:51,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78371713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:51,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178906602] [2021-06-05 21:13:51,162 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 602 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 602 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:51,197 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-06-05 21:13:51,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:51,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:13:51,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:51,301 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 148 proven. 79 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:13:51,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178906602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:51,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:51,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 15 [2021-06-05 21:13:51,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430140449] [2021-06-05 21:13:51,301 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:13:51,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:51,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:13:51,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:13:51,301 INFO L87 Difference]: Start difference. First operand 21628 states and 57031 transitions. Second operand has 16 states, 16 states have (on average 4.3125) internal successors, (69), 15 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:51,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:51,668 INFO L93 Difference]: Finished difference Result 33319 states and 81655 transitions. [2021-06-05 21:13:51,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:13:51,669 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.3125) internal successors, (69), 15 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 21:13:51,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:51,709 INFO L225 Difference]: With dead ends: 33319 [2021-06-05 21:13:51,709 INFO L226 Difference]: Without dead ends: 33319 [2021-06-05 21:13:51,709 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 157.5ms TimeCoverageRelationStatistics Valid=217, Invalid=335, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:13:51,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33319 states. [2021-06-05 21:13:52,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33319 to 21577. [2021-06-05 21:13:52,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21577 states, 21576 states have (on average 2.6354746014089727) internal successors, (56863), 21576 states have internal predecessors, (56863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:52,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21577 states to 21577 states and 56863 transitions. [2021-06-05 21:13:52,067 INFO L78 Accepts]: Start accepts. Automaton has 21577 states and 56863 transitions. Word has length 65 [2021-06-05 21:13:52,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:52,067 INFO L482 AbstractCegarLoop]: Abstraction has 21577 states and 56863 transitions. [2021-06-05 21:13:52,067 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.3125) internal successors, (69), 15 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:52,067 INFO L276 IsEmpty]: Start isEmpty. Operand 21577 states and 56863 transitions. [2021-06-05 21:13:52,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 21:13:52,082 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:52,082 INFO L554 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:52,282 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1288,602 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:52,282 INFO L430 AbstractCegarLoop]: === Iteration 611 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:52,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:52,282 INFO L82 PathProgramCache]: Analyzing trace with hash 1916575993, now seen corresponding path program 181 times [2021-06-05 21:13:52,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:52,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970326863] [2021-06-05 21:13:52,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:52,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:52,392 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 131 proven. 96 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:13:52,392 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:52,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970326863] [2021-06-05 21:13:52,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970326863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:52,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826178980] [2021-06-05 21:13:52,392 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 603 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 603 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:52,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:52,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:13:52,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:52,525 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 132 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:52,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826178980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:52,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:52,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 16 [2021-06-05 21:13:52,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477216167] [2021-06-05 21:13:52,525 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:13:52,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:52,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:13:52,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:13:52,526 INFO L87 Difference]: Start difference. First operand 21577 states and 56863 transitions. Second operand has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 16 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:52,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:52,974 INFO L93 Difference]: Finished difference Result 28453 states and 70741 transitions. [2021-06-05 21:13:52,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:13:52,974 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 16 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 21:13:52,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:53,005 INFO L225 Difference]: With dead ends: 28453 [2021-06-05 21:13:53,005 INFO L226 Difference]: Without dead ends: 28453 [2021-06-05 21:13:53,006 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 166.0ms TimeCoverageRelationStatistics Valid=206, Invalid=346, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:13:53,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28453 states. [2021-06-05 21:13:53,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28453 to 21132. [2021-06-05 21:13:53,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21132 states, 21131 states have (on average 2.630921395106715) internal successors, (55594), 21131 states have internal predecessors, (55594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:53,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21132 states to 21132 states and 55594 transitions. [2021-06-05 21:13:53,333 INFO L78 Accepts]: Start accepts. Automaton has 21132 states and 55594 transitions. Word has length 65 [2021-06-05 21:13:53,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:53,333 INFO L482 AbstractCegarLoop]: Abstraction has 21132 states and 55594 transitions. [2021-06-05 21:13:53,333 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 16 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:53,333 INFO L276 IsEmpty]: Start isEmpty. Operand 21132 states and 55594 transitions. [2021-06-05 21:13:53,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 21:13:53,347 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:53,347 INFO L554 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:53,547 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 603 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1289 [2021-06-05 21:13:53,548 INFO L430 AbstractCegarLoop]: === Iteration 612 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:53,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:53,548 INFO L82 PathProgramCache]: Analyzing trace with hash 447010829, now seen corresponding path program 372 times [2021-06-05 21:13:53,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:53,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584833092] [2021-06-05 21:13:53,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:53,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:53,651 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 78 proven. 149 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:13:53,651 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:53,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584833092] [2021-06-05 21:13:53,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584833092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:53,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970866687] [2021-06-05 21:13:53,652 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 604 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 604 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:53,684 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 21:13:53,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:53,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:13:53,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:53,779 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 78 proven. 149 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:13:53,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970866687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:53,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:53,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-06-05 21:13:53,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840505056] [2021-06-05 21:13:53,780 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:13:53,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:53,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:13:53,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:13:53,780 INFO L87 Difference]: Start difference. First operand 21132 states and 55594 transitions. Second operand has 16 states, 16 states have (on average 4.0) internal successors, (64), 15 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:54,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:54,210 INFO L93 Difference]: Finished difference Result 25089 states and 62416 transitions. [2021-06-05 21:13:54,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:13:54,210 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.0) internal successors, (64), 15 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 21:13:54,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:54,239 INFO L225 Difference]: With dead ends: 25089 [2021-06-05 21:13:54,239 INFO L226 Difference]: Without dead ends: 25053 [2021-06-05 21:13:54,240 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 135.8ms TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:13:54,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25053 states. [2021-06-05 21:13:54,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25053 to 21132. [2021-06-05 21:13:54,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21132 states, 21131 states have (on average 2.6304954805735647) internal successors, (55585), 21131 states have internal predecessors, (55585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:54,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21132 states to 21132 states and 55585 transitions. [2021-06-05 21:13:54,635 INFO L78 Accepts]: Start accepts. Automaton has 21132 states and 55585 transitions. Word has length 65 [2021-06-05 21:13:54,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:54,635 INFO L482 AbstractCegarLoop]: Abstraction has 21132 states and 55585 transitions. [2021-06-05 21:13:54,635 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.0) internal successors, (64), 15 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:54,635 INFO L276 IsEmpty]: Start isEmpty. Operand 21132 states and 55585 transitions. [2021-06-05 21:13:54,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 21:13:54,653 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:54,653 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:54,853 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1290,604 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:54,853 INFO L430 AbstractCegarLoop]: === Iteration 613 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:54,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:54,854 INFO L82 PathProgramCache]: Analyzing trace with hash -749006070, now seen corresponding path program 182 times [2021-06-05 21:13:54,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:54,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565437741] [2021-06-05 21:13:54,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:54,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:54,971 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 10 proven. 213 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:13:54,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:54,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565437741] [2021-06-05 21:13:54,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565437741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:54,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226714234] [2021-06-05 21:13:54,971 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 605 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 605 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:55,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:13:55,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:55,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 21:13:55,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:55,107 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 9 proven. 214 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:13:55,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226714234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:55,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:55,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:13:55,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516814493] [2021-06-05 21:13:55,107 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:13:55,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:55,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:13:55,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:13:55,108 INFO L87 Difference]: Start difference. First operand 21132 states and 55585 transitions. Second operand has 13 states, 13 states have (on average 5.0) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:55,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:55,811 INFO L93 Difference]: Finished difference Result 23500 states and 60212 transitions. [2021-06-05 21:13:55,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:13:55,811 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 21:13:55,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:55,837 INFO L225 Difference]: With dead ends: 23500 [2021-06-05 21:13:55,837 INFO L226 Difference]: Without dead ends: 23462 [2021-06-05 21:13:55,838 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 187.2ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:13:55,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23462 states. [2021-06-05 21:13:56,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23462 to 21360. [2021-06-05 21:13:56,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21360 states, 21359 states have (on average 2.6287747553724423) internal successors, (56148), 21359 states have internal predecessors, (56148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:56,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21360 states to 21360 states and 56148 transitions. [2021-06-05 21:13:56,131 INFO L78 Accepts]: Start accepts. Automaton has 21360 states and 56148 transitions. Word has length 65 [2021-06-05 21:13:56,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:56,131 INFO L482 AbstractCegarLoop]: Abstraction has 21360 states and 56148 transitions. [2021-06-05 21:13:56,132 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:56,132 INFO L276 IsEmpty]: Start isEmpty. Operand 21360 states and 56148 transitions. [2021-06-05 21:13:56,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 21:13:56,145 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:56,145 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:56,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1296,605 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:56,346 INFO L430 AbstractCegarLoop]: === Iteration 614 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:56,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:56,346 INFO L82 PathProgramCache]: Analyzing trace with hash 751326922, now seen corresponding path program 373 times [2021-06-05 21:13:56,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:56,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474146929] [2021-06-05 21:13:56,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:56,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:56,445 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 22 proven. 201 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:13:56,446 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:56,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474146929] [2021-06-05 21:13:56,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474146929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:56,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231832848] [2021-06-05 21:13:56,446 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 606 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 606 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:56,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:56,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 21:13:56,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:56,585 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 17 proven. 206 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:13:56,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231832848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:56,585 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:56,585 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 21:13:56,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276691842] [2021-06-05 21:13:56,585 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:13:56,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:56,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:13:56,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:13:56,585 INFO L87 Difference]: Start difference. First operand 21360 states and 56148 transitions. Second operand has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 12 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:57,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:57,458 INFO L93 Difference]: Finished difference Result 22708 states and 58520 transitions. [2021-06-05 21:13:57,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:13:57,458 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 12 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 21:13:57,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:57,486 INFO L225 Difference]: With dead ends: 22708 [2021-06-05 21:13:57,486 INFO L226 Difference]: Without dead ends: 22616 [2021-06-05 21:13:57,486 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 176.1ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:13:57,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22616 states. [2021-06-05 21:13:57,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22616 to 21349. [2021-06-05 21:13:57,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21349 states, 21348 states have (on average 2.6255386921491475) internal successors, (56050), 21348 states have internal predecessors, (56050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:57,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21349 states to 21349 states and 56050 transitions. [2021-06-05 21:13:57,789 INFO L78 Accepts]: Start accepts. Automaton has 21349 states and 56050 transitions. Word has length 65 [2021-06-05 21:13:57,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:57,789 INFO L482 AbstractCegarLoop]: Abstraction has 21349 states and 56050 transitions. [2021-06-05 21:13:57,789 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 12 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:57,789 INFO L276 IsEmpty]: Start isEmpty. Operand 21349 states and 56050 transitions. [2021-06-05 21:13:57,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 21:13:57,803 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:57,803 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:58,003 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 606 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1297 [2021-06-05 21:13:58,003 INFO L430 AbstractCegarLoop]: === Iteration 615 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:58,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:58,003 INFO L82 PathProgramCache]: Analyzing trace with hash 137790742, now seen corresponding path program 374 times [2021-06-05 21:13:58,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:58,004 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545101878] [2021-06-05 21:13:58,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:58,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:58,111 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 19 proven. 202 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:13:58,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:58,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545101878] [2021-06-05 21:13:58,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545101878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:58,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278453576] [2021-06-05 21:13:58,112 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 607 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 607 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:58,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:13:58,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:58,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 21:13:58,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:58,237 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 203 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:13:58,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278453576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:58,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:58,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:13:58,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64497208] [2021-06-05 21:13:58,237 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:13:58,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:58,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:13:58,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:13:58,238 INFO L87 Difference]: Start difference. First operand 21349 states and 56050 transitions. Second operand has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:58,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:58,959 INFO L93 Difference]: Finished difference Result 23448 states and 60119 transitions. [2021-06-05 21:13:58,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:13:58,959 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 21:13:58,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:58,985 INFO L225 Difference]: With dead ends: 23448 [2021-06-05 21:13:58,986 INFO L226 Difference]: Without dead ends: 23436 [2021-06-05 21:13:58,986 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 173.8ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:13:59,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23436 states. [2021-06-05 21:13:59,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23436 to 21445. [2021-06-05 21:13:59,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21445 states, 21444 states have (on average 2.624743518000373) internal successors, (56285), 21444 states have internal predecessors, (56285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:59,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21445 states to 21445 states and 56285 transitions. [2021-06-05 21:13:59,356 INFO L78 Accepts]: Start accepts. Automaton has 21445 states and 56285 transitions. Word has length 65 [2021-06-05 21:13:59,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:59,356 INFO L482 AbstractCegarLoop]: Abstraction has 21445 states and 56285 transitions. [2021-06-05 21:13:59,356 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:59,356 INFO L276 IsEmpty]: Start isEmpty. Operand 21445 states and 56285 transitions. [2021-06-05 21:13:59,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 21:13:59,371 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:59,371 INFO L554 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:59,571 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 607 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1298 [2021-06-05 21:13:59,572 INFO L430 AbstractCegarLoop]: === Iteration 616 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:59,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:59,572 INFO L82 PathProgramCache]: Analyzing trace with hash -1510566761, now seen corresponding path program 375 times [2021-06-05 21:13:59,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:59,572 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244881583] [2021-06-05 21:13:59,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:59,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:59,646 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 64 proven. 161 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:13:59,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:59,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244881583] [2021-06-05 21:13:59,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244881583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:59,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430339400] [2021-06-05 21:13:59,646 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 608 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 608 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:59,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-06-05 21:13:59,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:59,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:13:59,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:59,774 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 64 proven. 161 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:13:59,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430339400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:59,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:59,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-05 21:13:59,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875846072] [2021-06-05 21:13:59,775 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:13:59,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:59,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:13:59,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:13:59,775 INFO L87 Difference]: Start difference. First operand 21445 states and 56285 transitions. Second operand has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:00,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:00,032 INFO L93 Difference]: Finished difference Result 26049 states and 64269 transitions. [2021-06-05 21:14:00,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:14:00,032 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 21:14:00,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:00,065 INFO L225 Difference]: With dead ends: 26049 [2021-06-05 21:14:00,065 INFO L226 Difference]: Without dead ends: 26031 [2021-06-05 21:14:00,066 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 83.6ms TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:14:00,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26031 states. [2021-06-05 21:14:00,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26031 to 21412. [2021-06-05 21:14:00,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21412 states, 21411 states have (on average 2.622623884918967) internal successors, (56153), 21411 states have internal predecessors, (56153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:00,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21412 states to 21412 states and 56153 transitions. [2021-06-05 21:14:00,375 INFO L78 Accepts]: Start accepts. Automaton has 21412 states and 56153 transitions. Word has length 65 [2021-06-05 21:14:00,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:00,375 INFO L482 AbstractCegarLoop]: Abstraction has 21412 states and 56153 transitions. [2021-06-05 21:14:00,376 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:00,376 INFO L276 IsEmpty]: Start isEmpty. Operand 21412 states and 56153 transitions. [2021-06-05 21:14:00,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 21:14:00,391 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:00,391 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:00,591 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 608 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1299 [2021-06-05 21:14:00,591 INFO L430 AbstractCegarLoop]: === Iteration 617 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:00,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:00,591 INFO L82 PathProgramCache]: Analyzing trace with hash -2015259220, now seen corresponding path program 376 times [2021-06-05 21:14:00,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:00,592 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715752877] [2021-06-05 21:14:00,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:00,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:00,698 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 19 proven. 204 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:14:00,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:00,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715752877] [2021-06-05 21:14:00,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715752877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:00,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99816608] [2021-06-05 21:14:00,699 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 609 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 609 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:00,729 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:14:00,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:14:00,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 21:14:00,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:00,825 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 205 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:14:00,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99816608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:00,825 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:00,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 21:14:00,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724597946] [2021-06-05 21:14:00,826 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:14:00,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:00,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:14:00,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:14:00,826 INFO L87 Difference]: Start difference. First operand 21412 states and 56153 transitions. Second operand has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:01,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:01,763 INFO L93 Difference]: Finished difference Result 25666 states and 64906 transitions. [2021-06-05 21:14:01,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 21:14:01,763 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 21:14:01,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:01,795 INFO L225 Difference]: With dead ends: 25666 [2021-06-05 21:14:01,795 INFO L226 Difference]: Without dead ends: 25612 [2021-06-05 21:14:01,795 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 266.1ms TimeCoverageRelationStatistics Valid=111, Invalid=819, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:14:01,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25612 states. [2021-06-05 21:14:02,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25612 to 21675. [2021-06-05 21:14:02,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21675 states, 21674 states have (on average 2.6232813509273782) internal successors, (56857), 21674 states have internal predecessors, (56857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:02,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21675 states to 21675 states and 56857 transitions. [2021-06-05 21:14:02,101 INFO L78 Accepts]: Start accepts. Automaton has 21675 states and 56857 transitions. Word has length 65 [2021-06-05 21:14:02,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:02,101 INFO L482 AbstractCegarLoop]: Abstraction has 21675 states and 56857 transitions. [2021-06-05 21:14:02,101 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:02,101 INFO L276 IsEmpty]: Start isEmpty. Operand 21675 states and 56857 transitions. [2021-06-05 21:14:02,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 21:14:02,116 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:02,116 INFO L554 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:02,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 609 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1302 [2021-06-05 21:14:02,316 INFO L430 AbstractCegarLoop]: === Iteration 618 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:02,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:02,317 INFO L82 PathProgramCache]: Analyzing trace with hash -482700111, now seen corresponding path program 377 times [2021-06-05 21:14:02,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:02,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846109651] [2021-06-05 21:14:02,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:02,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:02,402 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 61 proven. 165 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:14:02,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:02,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846109651] [2021-06-05 21:14:02,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846109651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:02,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524619112] [2021-06-05 21:14:02,403 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 610 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 610 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:02,436 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-06-05 21:14:02,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:14:02,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:14:02,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:02,558 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 62 proven. 165 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:14:02,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524619112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:02,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:02,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 18 [2021-06-05 21:14:02,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179795525] [2021-06-05 21:14:02,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:14:02,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:02,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:14:02,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:14:02,559 INFO L87 Difference]: Start difference. First operand 21675 states and 56857 transitions. Second operand has 19 states, 19 states have (on average 4.7894736842105265) internal successors, (91), 18 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:02,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:02,896 INFO L93 Difference]: Finished difference Result 26526 states and 65340 transitions. [2021-06-05 21:14:02,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:14:02,897 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.7894736842105265) internal successors, (91), 18 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 21:14:02,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:02,925 INFO L225 Difference]: With dead ends: 26526 [2021-06-05 21:14:02,925 INFO L226 Difference]: Without dead ends: 26502 [2021-06-05 21:14:02,925 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 129.2ms TimeCoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:14:02,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26502 states. [2021-06-05 21:14:03,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26502 to 21675. [2021-06-05 21:14:03,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21675 states, 21674 states have (on average 2.6224508627849037) internal successors, (56839), 21674 states have internal predecessors, (56839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:03,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21675 states to 21675 states and 56839 transitions. [2021-06-05 21:14:03,365 INFO L78 Accepts]: Start accepts. Automaton has 21675 states and 56839 transitions. Word has length 65 [2021-06-05 21:14:03,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:03,365 INFO L482 AbstractCegarLoop]: Abstraction has 21675 states and 56839 transitions. [2021-06-05 21:14:03,365 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.7894736842105265) internal successors, (91), 18 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:03,365 INFO L276 IsEmpty]: Start isEmpty. Operand 21675 states and 56839 transitions. [2021-06-05 21:14:03,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 21:14:03,380 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:03,380 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:03,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1303,610 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:03,580 INFO L430 AbstractCegarLoop]: === Iteration 619 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:03,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:03,580 INFO L82 PathProgramCache]: Analyzing trace with hash -1860422686, now seen corresponding path program 378 times [2021-06-05 21:14:03,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:03,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344711893] [2021-06-05 21:14:03,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:03,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:03,698 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 19 proven. 204 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:14:03,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:03,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344711893] [2021-06-05 21:14:03,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344711893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:03,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666200937] [2021-06-05 21:14:03,698 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 611 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 611 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:03,733 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-06-05 21:14:03,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:14:03,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 21:14:03,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:03,829 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 205 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:14:03,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666200937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:03,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:03,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:14:03,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609526945] [2021-06-05 21:14:03,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:14:03,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:03,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:14:03,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:14:03,829 INFO L87 Difference]: Start difference. First operand 21675 states and 56839 transitions. Second operand has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 14 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:04,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:04,998 INFO L93 Difference]: Finished difference Result 30486 states and 75594 transitions. [2021-06-05 21:14:04,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 21:14:04,998 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 14 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 21:14:04,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:05,036 INFO L225 Difference]: With dead ends: 30486 [2021-06-05 21:14:05,036 INFO L226 Difference]: Without dead ends: 30306 [2021-06-05 21:14:05,036 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 452.3ms TimeCoverageRelationStatistics Valid=237, Invalid=1925, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 21:14:05,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30306 states. [2021-06-05 21:14:05,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30306 to 22166. [2021-06-05 21:14:05,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22166 states, 22165 states have (on average 2.6220618091585832) internal successors, (58118), 22165 states have internal predecessors, (58118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:05,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22166 states to 22166 states and 58118 transitions. [2021-06-05 21:14:05,403 INFO L78 Accepts]: Start accepts. Automaton has 22166 states and 58118 transitions. Word has length 65 [2021-06-05 21:14:05,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:05,403 INFO L482 AbstractCegarLoop]: Abstraction has 22166 states and 58118 transitions. [2021-06-05 21:14:05,403 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 14 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:05,403 INFO L276 IsEmpty]: Start isEmpty. Operand 22166 states and 58118 transitions. [2021-06-05 21:14:05,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 21:14:05,418 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:05,418 INFO L554 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:05,618 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1307,611 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:05,619 INFO L430 AbstractCegarLoop]: === Iteration 620 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:05,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:05,619 INFO L82 PathProgramCache]: Analyzing trace with hash -1473820009, now seen corresponding path program 379 times [2021-06-05 21:14:05,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:05,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161564009] [2021-06-05 21:14:05,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:05,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:05,713 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 59 proven. 167 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:14:05,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:05,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161564009] [2021-06-05 21:14:05,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161564009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:05,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729693334] [2021-06-05 21:14:05,713 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 612 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 612 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:05,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:05,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:14:05,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:05,835 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 59 proven. 167 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:14:05,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729693334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:05,836 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:05,836 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-05 21:14:05,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767911171] [2021-06-05 21:14:05,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:14:05,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:05,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:14:05,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:14:05,836 INFO L87 Difference]: Start difference. First operand 22166 states and 58118 transitions. Second operand has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 14 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:06,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:06,114 INFO L93 Difference]: Finished difference Result 26943 states and 66422 transitions. [2021-06-05 21:14:06,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:14:06,114 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 14 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 21:14:06,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:06,144 INFO L225 Difference]: With dead ends: 26943 [2021-06-05 21:14:06,144 INFO L226 Difference]: Without dead ends: 26910 [2021-06-05 21:14:06,144 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 112.4ms TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:14:06,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26910 states. [2021-06-05 21:14:06,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26910 to 22166. [2021-06-05 21:14:06,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22166 states, 22165 states have (on average 2.6216557635912476) internal successors, (58109), 22165 states have internal predecessors, (58109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:06,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22166 states to 22166 states and 58109 transitions. [2021-06-05 21:14:06,476 INFO L78 Accepts]: Start accepts. Automaton has 22166 states and 58109 transitions. Word has length 65 [2021-06-05 21:14:06,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:06,477 INFO L482 AbstractCegarLoop]: Abstraction has 22166 states and 58109 transitions. [2021-06-05 21:14:06,477 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 14 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:06,477 INFO L276 IsEmpty]: Start isEmpty. Operand 22166 states and 58109 transitions. [2021-06-05 21:14:06,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 21:14:06,491 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:06,491 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:06,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 612 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1308 [2021-06-05 21:14:06,692 INFO L430 AbstractCegarLoop]: === Iteration 621 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:06,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:06,692 INFO L82 PathProgramCache]: Analyzing trace with hash -1920114196, now seen corresponding path program 380 times [2021-06-05 21:14:06,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:06,692 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979181827] [2021-06-05 21:14:06,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:06,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:06,825 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 19 proven. 204 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:14:06,825 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:06,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979181827] [2021-06-05 21:14:06,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979181827] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:06,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215029690] [2021-06-05 21:14:06,825 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 613 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 613 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:06,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:14:06,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:14:06,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 21:14:06,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:06,949 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 205 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:14:06,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215029690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:06,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:06,950 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 21:14:06,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885945909] [2021-06-05 21:14:06,950 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:14:06,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:06,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:14:06,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:14:06,950 INFO L87 Difference]: Start difference. First operand 22166 states and 58109 transitions. Second operand has 16 states, 16 states have (on average 4.0625) internal successors, (65), 15 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:08,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:08,531 INFO L93 Difference]: Finished difference Result 36934 states and 90171 transitions. [2021-06-05 21:14:08,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-05 21:14:08,532 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.0625) internal successors, (65), 15 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 21:14:08,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:08,571 INFO L225 Difference]: With dead ends: 36934 [2021-06-05 21:14:08,571 INFO L226 Difference]: Without dead ends: 36658 [2021-06-05 21:14:08,572 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1534 ImplicationChecksByTransitivity, 791.0ms TimeCoverageRelationStatistics Valid=507, Invalid=4463, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 21:14:08,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36658 states. [2021-06-05 21:14:08,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36658 to 22558. [2021-06-05 21:14:08,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22558 states, 22557 states have (on average 2.621492219710068) internal successors, (59133), 22557 states have internal predecessors, (59133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:09,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22558 states to 22558 states and 59133 transitions. [2021-06-05 21:14:09,016 INFO L78 Accepts]: Start accepts. Automaton has 22558 states and 59133 transitions. Word has length 65 [2021-06-05 21:14:09,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:09,016 INFO L482 AbstractCegarLoop]: Abstraction has 22558 states and 59133 transitions. [2021-06-05 21:14:09,016 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.0625) internal successors, (65), 15 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:09,016 INFO L276 IsEmpty]: Start isEmpty. Operand 22558 states and 59133 transitions. [2021-06-05 21:14:09,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 21:14:09,030 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:09,030 INFO L554 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:09,230 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 613 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1313 [2021-06-05 21:14:09,231 INFO L430 AbstractCegarLoop]: === Iteration 622 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:09,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:09,231 INFO L82 PathProgramCache]: Analyzing trace with hash -26541327, now seen corresponding path program 381 times [2021-06-05 21:14:09,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:09,231 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089245678] [2021-06-05 21:14:09,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:09,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:09,335 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 63 proven. 163 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:14:09,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:09,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089245678] [2021-06-05 21:14:09,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089245678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:09,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123651362] [2021-06-05 21:14:09,336 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 614 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 614 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:09,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 21:14:09,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:14:09,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:14:09,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:09,465 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 63 proven. 163 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:14:09,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123651362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:09,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:09,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-06-05 21:14:09,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747933323] [2021-06-05 21:14:09,466 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:14:09,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:09,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:14:09,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:14:09,466 INFO L87 Difference]: Start difference. First operand 22558 states and 59133 transitions. Second operand has 16 states, 16 states have (on average 4.0) internal successors, (64), 15 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:09,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:09,779 INFO L93 Difference]: Finished difference Result 27397 states and 67556 transitions. [2021-06-05 21:14:09,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:14:09,779 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.0) internal successors, (64), 15 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 21:14:09,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:09,813 INFO L225 Difference]: With dead ends: 27397 [2021-06-05 21:14:09,813 INFO L226 Difference]: Without dead ends: 27355 [2021-06-05 21:14:09,813 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 132.7ms TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:14:09,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27355 states. [2021-06-05 21:14:10,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27355 to 22069. [2021-06-05 21:14:10,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22069 states, 22068 states have (on average 2.616594163494653) internal successors, (57743), 22068 states have internal predecessors, (57743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:10,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22069 states to 22069 states and 57743 transitions. [2021-06-05 21:14:10,151 INFO L78 Accepts]: Start accepts. Automaton has 22069 states and 57743 transitions. Word has length 65 [2021-06-05 21:14:10,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:10,151 INFO L482 AbstractCegarLoop]: Abstraction has 22069 states and 57743 transitions. [2021-06-05 21:14:10,151 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.0) internal successors, (64), 15 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:10,151 INFO L276 IsEmpty]: Start isEmpty. Operand 22069 states and 57743 transitions. [2021-06-05 21:14:10,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 21:14:10,165 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:10,165 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:10,365 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1314,614 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:10,366 INFO L430 AbstractCegarLoop]: === Iteration 623 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:10,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:10,366 INFO L82 PathProgramCache]: Analyzing trace with hash -2073428062, now seen corresponding path program 382 times [2021-06-05 21:14:10,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:10,366 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854890885] [2021-06-05 21:14:10,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:10,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:10,507 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 207 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:14:10,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:10,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854890885] [2021-06-05 21:14:10,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854890885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:10,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511894324] [2021-06-05 21:14:10,507 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 615 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 615 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:10,536 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:14:10,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:14:10,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 21:14:10,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:10,629 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 207 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:14:10,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511894324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:10,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:10,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-06-05 21:14:10,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223912327] [2021-06-05 21:14:10,630 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:14:10,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:10,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:14:10,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:14:10,630 INFO L87 Difference]: Start difference. First operand 22069 states and 57743 transitions. Second operand has 17 states, 17 states have (on average 3.8823529411764706) internal successors, (66), 16 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:11,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:11,651 INFO L93 Difference]: Finished difference Result 30333 states and 75005 transitions. [2021-06-05 21:14:11,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 21:14:11,652 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.8823529411764706) internal successors, (66), 16 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 21:14:11,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:11,686 INFO L225 Difference]: With dead ends: 30333 [2021-06-05 21:14:11,686 INFO L226 Difference]: Without dead ends: 29955 [2021-06-05 21:14:11,686 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 339.5ms TimeCoverageRelationStatistics Valid=150, Invalid=972, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 21:14:11,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29955 states. [2021-06-05 21:14:11,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29955 to 20830. [2021-06-05 21:14:11,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20830 states, 20829 states have (on average 2.6126074223438476) internal successors, (54418), 20829 states have internal predecessors, (54418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:12,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20830 states to 20830 states and 54418 transitions. [2021-06-05 21:14:12,012 INFO L78 Accepts]: Start accepts. Automaton has 20830 states and 54418 transitions. Word has length 65 [2021-06-05 21:14:12,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:12,012 INFO L482 AbstractCegarLoop]: Abstraction has 20830 states and 54418 transitions. [2021-06-05 21:14:12,012 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.8823529411764706) internal successors, (66), 16 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:12,012 INFO L276 IsEmpty]: Start isEmpty. Operand 20830 states and 54418 transitions. [2021-06-05 21:14:12,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 21:14:12,026 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:12,026 INFO L554 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:12,226 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 615 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1320 [2021-06-05 21:14:12,226 INFO L430 AbstractCegarLoop]: === Iteration 624 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:12,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:12,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1983477717, now seen corresponding path program 183 times [2021-06-05 21:14:12,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:12,227 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330307905] [2021-06-05 21:14:12,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:12,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:12,300 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 174 proven. 53 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:14:12,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:12,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330307905] [2021-06-05 21:14:12,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330307905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:12,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427490910] [2021-06-05 21:14:12,301 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 616 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 616 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:12,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-06-05 21:14:12,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:14:12,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:14:12,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:12,434 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 175 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:12,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427490910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:12,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:12,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-06-05 21:14:12,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858902671] [2021-06-05 21:14:12,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:14:12,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:12,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:14:12,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:14:12,435 INFO L87 Difference]: Start difference. First operand 20830 states and 54418 transitions. Second operand has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:12,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:12,708 INFO L93 Difference]: Finished difference Result 26854 states and 66816 transitions. [2021-06-05 21:14:12,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:14:12,708 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 21:14:12,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:12,740 INFO L225 Difference]: With dead ends: 26854 [2021-06-05 21:14:12,740 INFO L226 Difference]: Without dead ends: 26832 [2021-06-05 21:14:12,741 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 80.0ms TimeCoverageRelationStatistics Valid=98, Invalid=142, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:14:12,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26832 states. [2021-06-05 21:14:13,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26832 to 21370. [2021-06-05 21:14:13,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21370 states, 21369 states have (on average 2.616406944639431) internal successors, (55910), 21369 states have internal predecessors, (55910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:13,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21370 states to 21370 states and 55910 transitions. [2021-06-05 21:14:13,114 INFO L78 Accepts]: Start accepts. Automaton has 21370 states and 55910 transitions. Word has length 65 [2021-06-05 21:14:13,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:13,114 INFO L482 AbstractCegarLoop]: Abstraction has 21370 states and 55910 transitions. [2021-06-05 21:14:13,114 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:13,114 INFO L276 IsEmpty]: Start isEmpty. Operand 21370 states and 55910 transitions. [2021-06-05 21:14:13,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 21:14:13,129 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:13,129 INFO L554 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:13,330 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 616 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1321 [2021-06-05 21:14:13,330 INFO L430 AbstractCegarLoop]: === Iteration 625 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:13,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:13,330 INFO L82 PathProgramCache]: Analyzing trace with hash 1361597307, now seen corresponding path program 184 times [2021-06-05 21:14:13,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:13,330 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426993284] [2021-06-05 21:14:13,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:13,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:13,404 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 174 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:14:13,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:13,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426993284] [2021-06-05 21:14:13,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426993284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:13,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105172385] [2021-06-05 21:14:13,405 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 617 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 617 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:13,433 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:14:13,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:14:13,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:14:13,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:13,534 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 175 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:14:13,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105172385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:13,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:13,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-06-05 21:14:13,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551912585] [2021-06-05 21:14:13,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:14:13,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:13,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:14:13,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:14:13,535 INFO L87 Difference]: Start difference. First operand 21370 states and 55910 transitions. Second operand has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:13,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:13,863 INFO L93 Difference]: Finished difference Result 33593 states and 82285 transitions. [2021-06-05 21:14:13,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:14:13,863 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 21:14:13,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:13,902 INFO L225 Difference]: With dead ends: 33593 [2021-06-05 21:14:13,903 INFO L226 Difference]: Without dead ends: 33593 [2021-06-05 21:14:13,903 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 107.2ms TimeCoverageRelationStatistics Valid=146, Invalid=196, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:14:13,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33593 states. [2021-06-05 21:14:14,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33593 to 21389. [2021-06-05 21:14:14,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21389 states, 21388 states have (on average 2.6167477089956983) internal successors, (55967), 21388 states have internal predecessors, (55967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:14,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21389 states to 21389 states and 55967 transitions. [2021-06-05 21:14:14,257 INFO L78 Accepts]: Start accepts. Automaton has 21389 states and 55967 transitions. Word has length 65 [2021-06-05 21:14:14,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:14,257 INFO L482 AbstractCegarLoop]: Abstraction has 21389 states and 55967 transitions. [2021-06-05 21:14:14,257 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:14,257 INFO L276 IsEmpty]: Start isEmpty. Operand 21389 states and 55967 transitions. [2021-06-05 21:14:14,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 21:14:14,272 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:14,272 INFO L554 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:14,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 617 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1323 [2021-06-05 21:14:14,472 INFO L430 AbstractCegarLoop]: === Iteration 626 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:14,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:14,473 INFO L82 PathProgramCache]: Analyzing trace with hash -275975149, now seen corresponding path program 185 times [2021-06-05 21:14:14,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:14,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408527677] [2021-06-05 21:14:14,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:14,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:14,556 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 171 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:14:14,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:14,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408527677] [2021-06-05 21:14:14,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408527677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:14,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819068893] [2021-06-05 21:14:14,556 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 618 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 618 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:14,593 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-06-05 21:14:14,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:14:14,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:14:14,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:14,797 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 173 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:14,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819068893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:14,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:14,798 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 24 [2021-06-05 21:14:14,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823855345] [2021-06-05 21:14:14,798 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:14:14,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:14,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:14:14,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=394, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:14:14,798 INFO L87 Difference]: Start difference. First operand 21389 states and 55967 transitions. Second operand has 25 states, 25 states have (on average 3.72) internal successors, (93), 24 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:15,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:15,531 INFO L93 Difference]: Finished difference Result 38717 states and 94084 transitions. [2021-06-05 21:14:15,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 21:14:15,531 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.72) internal successors, (93), 24 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 21:14:15,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:15,577 INFO L225 Difference]: With dead ends: 38717 [2021-06-05 21:14:15,577 INFO L226 Difference]: Without dead ends: 38717 [2021-06-05 21:14:15,577 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 411.5ms TimeCoverageRelationStatistics Valid=617, Invalid=1023, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 21:14:15,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38717 states. [2021-06-05 21:14:15,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38717 to 21452. [2021-06-05 21:14:15,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21452 states, 21451 states have (on average 2.6186191785930726) internal successors, (56172), 21451 states have internal predecessors, (56172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:15,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21452 states to 21452 states and 56172 transitions. [2021-06-05 21:14:15,957 INFO L78 Accepts]: Start accepts. Automaton has 21452 states and 56172 transitions. Word has length 65 [2021-06-05 21:14:15,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:15,957 INFO L482 AbstractCegarLoop]: Abstraction has 21452 states and 56172 transitions. [2021-06-05 21:14:15,957 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 3.72) internal successors, (93), 24 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:15,957 INFO L276 IsEmpty]: Start isEmpty. Operand 21452 states and 56172 transitions. [2021-06-05 21:14:15,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 21:14:15,972 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:15,972 INFO L554 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:16,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1324,618 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:16,173 INFO L430 AbstractCegarLoop]: === Iteration 627 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:16,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:16,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1965970313, now seen corresponding path program 186 times [2021-06-05 21:14:16,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:16,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425674158] [2021-06-05 21:14:16,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:16,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:16,269 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 158 proven. 68 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:14:16,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:16,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425674158] [2021-06-05 21:14:16,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425674158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:16,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203535258] [2021-06-05 21:14:16,269 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 619 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 619 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:16,304 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-06-05 21:14:16,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:14:16,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:14:16,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:16,407 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 159 proven. 68 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:14:16,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203535258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:16,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:16,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 15 [2021-06-05 21:14:16,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705694775] [2021-06-05 21:14:16,407 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:14:16,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:16,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:14:16,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:14:16,407 INFO L87 Difference]: Start difference. First operand 21452 states and 56172 transitions. Second operand has 16 states, 16 states have (on average 4.3125) internal successors, (69), 15 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:16,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:16,902 INFO L93 Difference]: Finished difference Result 36438 states and 88848 transitions. [2021-06-05 21:14:16,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:14:16,902 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.3125) internal successors, (69), 15 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 21:14:16,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:16,944 INFO L225 Difference]: With dead ends: 36438 [2021-06-05 21:14:16,944 INFO L226 Difference]: Without dead ends: 36438 [2021-06-05 21:14:16,945 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 186.4ms TimeCoverageRelationStatistics Valid=276, Invalid=426, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:14:16,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36438 states. [2021-06-05 21:14:17,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36438 to 21482. [2021-06-05 21:14:17,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21482 states, 21481 states have (on average 2.6190587030398955) internal successors, (56260), 21481 states have internal predecessors, (56260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:17,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21482 states to 21482 states and 56260 transitions. [2021-06-05 21:14:17,389 INFO L78 Accepts]: Start accepts. Automaton has 21482 states and 56260 transitions. Word has length 65 [2021-06-05 21:14:17,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:17,389 INFO L482 AbstractCegarLoop]: Abstraction has 21482 states and 56260 transitions. [2021-06-05 21:14:17,389 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.3125) internal successors, (69), 15 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:17,389 INFO L276 IsEmpty]: Start isEmpty. Operand 21482 states and 56260 transitions. [2021-06-05 21:14:17,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 21:14:17,403 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:17,403 INFO L554 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:17,603 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 619 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1325 [2021-06-05 21:14:17,604 INFO L430 AbstractCegarLoop]: === Iteration 628 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:17,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:17,604 INFO L82 PathProgramCache]: Analyzing trace with hash 1289709971, now seen corresponding path program 187 times [2021-06-05 21:14:17,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:17,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014773273] [2021-06-05 21:14:17,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:17,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:17,710 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 145 proven. 81 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:14:17,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:17,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014773273] [2021-06-05 21:14:17,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014773273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:17,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838352693] [2021-06-05 21:14:17,710 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 620 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 620 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:17,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:17,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:14:17,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:17,841 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 146 proven. 81 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:14:17,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838352693] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:17,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:17,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 16 [2021-06-05 21:14:17,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883932670] [2021-06-05 21:14:17,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:14:17,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:17,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:14:17,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:14:17,842 INFO L87 Difference]: Start difference. First operand 21482 states and 56260 transitions. Second operand has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 16 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:18,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:18,312 INFO L93 Difference]: Finished difference Result 32841 states and 80457 transitions. [2021-06-05 21:14:18,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:14:18,313 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 16 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 21:14:18,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:18,354 INFO L225 Difference]: With dead ends: 32841 [2021-06-05 21:14:18,354 INFO L226 Difference]: Without dead ends: 32841 [2021-06-05 21:14:18,354 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 201.1ms TimeCoverageRelationStatistics Valid=290, Invalid=466, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:14:18,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32841 states. [2021-06-05 21:14:18,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32841 to 21485. [2021-06-05 21:14:18,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21485 states, 21484 states have (on average 2.618460249487991) internal successors, (56255), 21484 states have internal predecessors, (56255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:18,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21485 states to 21485 states and 56255 transitions. [2021-06-05 21:14:18,732 INFO L78 Accepts]: Start accepts. Automaton has 21485 states and 56255 transitions. Word has length 65 [2021-06-05 21:14:18,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:18,732 INFO L482 AbstractCegarLoop]: Abstraction has 21485 states and 56255 transitions. [2021-06-05 21:14:18,732 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 16 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:18,732 INFO L276 IsEmpty]: Start isEmpty. Operand 21485 states and 56255 transitions. [2021-06-05 21:14:18,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 21:14:18,746 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:18,746 INFO L554 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:18,946 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1326,620 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:18,946 INFO L430 AbstractCegarLoop]: === Iteration 629 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:18,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:18,947 INFO L82 PathProgramCache]: Analyzing trace with hash -1985394953, now seen corresponding path program 188 times [2021-06-05 21:14:18,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:18,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149688175] [2021-06-05 21:14:18,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:18,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:19,066 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 132 proven. 95 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:14:19,067 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:19,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149688175] [2021-06-05 21:14:19,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149688175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:19,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031553539] [2021-06-05 21:14:19,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 621 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 621 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:19,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:14:19,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:14:19,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:14:19,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:19,201 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 133 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:19,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031553539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:19,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:19,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 17 [2021-06-05 21:14:19,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723299668] [2021-06-05 21:14:19,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:14:19,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:19,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:14:19,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:14:19,202 INFO L87 Difference]: Start difference. First operand 21485 states and 56255 transitions. Second operand has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 17 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:19,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:19,652 INFO L93 Difference]: Finished difference Result 27627 states and 68779 transitions. [2021-06-05 21:14:19,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:14:19,653 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 17 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 21:14:19,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:19,687 INFO L225 Difference]: With dead ends: 27627 [2021-06-05 21:14:19,687 INFO L226 Difference]: Without dead ends: 27627 [2021-06-05 21:14:19,687 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 200.4ms TimeCoverageRelationStatistics Valid=256, Invalid=446, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:14:19,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27627 states. [2021-06-05 21:14:19,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27627 to 20986. [2021-06-05 21:14:19,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20986 states, 20985 states have (on average 2.6141053133190373) internal successors, (54857), 20985 states have internal predecessors, (54857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:20,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20986 states to 20986 states and 54857 transitions. [2021-06-05 21:14:20,011 INFO L78 Accepts]: Start accepts. Automaton has 20986 states and 54857 transitions. Word has length 65 [2021-06-05 21:14:20,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:20,011 INFO L482 AbstractCegarLoop]: Abstraction has 20986 states and 54857 transitions. [2021-06-05 21:14:20,011 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 17 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:20,011 INFO L276 IsEmpty]: Start isEmpty. Operand 20986 states and 54857 transitions. [2021-06-05 21:14:20,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 21:14:20,024 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:20,024 INFO L554 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:20,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1327,621 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:20,225 INFO L430 AbstractCegarLoop]: === Iteration 630 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:20,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:20,225 INFO L82 PathProgramCache]: Analyzing trace with hash -1324010409, now seen corresponding path program 383 times [2021-06-05 21:14:20,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:20,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869689790] [2021-06-05 21:14:20,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:20,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:20,365 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 74 proven. 153 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:14:20,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:20,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869689790] [2021-06-05 21:14:20,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869689790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:20,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259814293] [2021-06-05 21:14:20,366 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 622 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 622 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:20,404 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 21:14:20,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:14:20,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:14:20,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:20,536 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 75 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:20,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259814293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:20,536 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:20,536 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 21 [2021-06-05 21:14:20,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406358894] [2021-06-05 21:14:20,537 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:14:20,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:20,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:14:20,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:14:20,537 INFO L87 Difference]: Start difference. First operand 20986 states and 54857 transitions. Second operand has 22 states, 22 states have (on average 4.136363636363637) internal successors, (91), 21 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:20,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:20,984 INFO L93 Difference]: Finished difference Result 25486 states and 62722 transitions. [2021-06-05 21:14:20,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:14:20,984 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.136363636363637) internal successors, (91), 21 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 21:14:20,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:21,015 INFO L225 Difference]: With dead ends: 25486 [2021-06-05 21:14:21,015 INFO L226 Difference]: Without dead ends: 25441 [2021-06-05 21:14:21,015 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 217.0ms TimeCoverageRelationStatistics Valid=188, Invalid=568, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:14:21,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25441 states. [2021-06-05 21:14:21,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25441 to 20986. [2021-06-05 21:14:21,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20986 states, 20985 states have (on average 2.613676435549202) internal successors, (54848), 20985 states have internal predecessors, (54848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:21,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20986 states to 20986 states and 54848 transitions. [2021-06-05 21:14:21,323 INFO L78 Accepts]: Start accepts. Automaton has 20986 states and 54848 transitions. Word has length 65 [2021-06-05 21:14:21,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:21,323 INFO L482 AbstractCegarLoop]: Abstraction has 20986 states and 54848 transitions. [2021-06-05 21:14:21,323 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.136363636363637) internal successors, (91), 21 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:21,323 INFO L276 IsEmpty]: Start isEmpty. Operand 20986 states and 54848 transitions. [2021-06-05 21:14:21,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 21:14:21,337 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:21,338 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:21,538 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1328,622 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:21,538 INFO L430 AbstractCegarLoop]: === Iteration 631 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:21,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:21,538 INFO L82 PathProgramCache]: Analyzing trace with hash 626281894, now seen corresponding path program 189 times [2021-06-05 21:14:21,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:21,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362653225] [2021-06-05 21:14:21,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:21,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:21,645 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 10 proven. 213 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:14:21,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:21,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362653225] [2021-06-05 21:14:21,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362653225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:21,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252931227] [2021-06-05 21:14:21,645 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 623 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 623 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:21,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-06-05 21:14:21,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:14:21,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 21:14:21,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:21,877 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 9 proven. 214 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:14:21,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252931227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:21,877 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:21,877 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:14:21,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707775315] [2021-06-05 21:14:21,877 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:14:21,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:21,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:14:21,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:14:21,878 INFO L87 Difference]: Start difference. First operand 20986 states and 54848 transitions. Second operand has 13 states, 13 states have (on average 5.0) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:22,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:22,557 INFO L93 Difference]: Finished difference Result 23249 states and 59286 transitions. [2021-06-05 21:14:22,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:14:22,557 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 21:14:22,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:22,582 INFO L225 Difference]: With dead ends: 23249 [2021-06-05 21:14:22,582 INFO L226 Difference]: Without dead ends: 23218 [2021-06-05 21:14:22,582 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 173.1ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:14:22,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23218 states. [2021-06-05 21:14:22,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23218 to 21247. [2021-06-05 21:14:22,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21247 states, 21246 states have (on average 2.6115974771721735) internal successors, (55486), 21246 states have internal predecessors, (55486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:22,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21247 states to 21247 states and 55486 transitions. [2021-06-05 21:14:22,889 INFO L78 Accepts]: Start accepts. Automaton has 21247 states and 55486 transitions. Word has length 65 [2021-06-05 21:14:22,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:22,889 INFO L482 AbstractCegarLoop]: Abstraction has 21247 states and 55486 transitions. [2021-06-05 21:14:22,889 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:22,889 INFO L276 IsEmpty]: Start isEmpty. Operand 21247 states and 55486 transitions. [2021-06-05 21:14:22,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 21:14:22,904 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:22,904 INFO L554 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:23,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 623 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1335 [2021-06-05 21:14:23,104 INFO L430 AbstractCegarLoop]: === Iteration 632 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:23,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:23,104 INFO L82 PathProgramCache]: Analyzing trace with hash -927414963, now seen corresponding path program 384 times [2021-06-05 21:14:23,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:23,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840433259] [2021-06-05 21:14:23,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:23,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:23,172 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 77 proven. 146 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:14:23,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:23,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840433259] [2021-06-05 21:14:23,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840433259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:23,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005701049] [2021-06-05 21:14:23,172 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 624 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 624 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:23,207 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-06-05 21:14:23,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:14:23,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:14:23,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:23,299 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 77 proven. 146 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:14:23,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005701049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:23,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:23,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 21:14:23,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131025717] [2021-06-05 21:14:23,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:14:23,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:23,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:14:23,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:14:23,300 INFO L87 Difference]: Start difference. First operand 21247 states and 55486 transitions. Second operand has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 11 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:23,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:23,507 INFO L93 Difference]: Finished difference Result 26072 states and 63936 transitions. [2021-06-05 21:14:23,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:14:23,508 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 11 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 21:14:23,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:23,538 INFO L225 Difference]: With dead ends: 26072 [2021-06-05 21:14:23,538 INFO L226 Difference]: Without dead ends: 26069 [2021-06-05 21:14:23,538 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 60.8ms TimeCoverageRelationStatistics Valid=67, Invalid=89, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:14:23,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26069 states. [2021-06-05 21:14:23,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26069 to 21233. [2021-06-05 21:14:23,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21233 states, 21232 states have (on average 2.610634890730972) internal successors, (55429), 21232 states have internal predecessors, (55429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:23,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21233 states to 21233 states and 55429 transitions. [2021-06-05 21:14:23,858 INFO L78 Accepts]: Start accepts. Automaton has 21233 states and 55429 transitions. Word has length 65 [2021-06-05 21:14:23,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:23,859 INFO L482 AbstractCegarLoop]: Abstraction has 21233 states and 55429 transitions. [2021-06-05 21:14:23,859 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 11 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:23,859 INFO L276 IsEmpty]: Start isEmpty. Operand 21233 states and 55429 transitions. [2021-06-05 21:14:23,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 21:14:23,873 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:23,873 INFO L554 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:24,073 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 624 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1336 [2021-06-05 21:14:24,073 INFO L430 AbstractCegarLoop]: === Iteration 633 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:24,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:24,073 INFO L82 PathProgramCache]: Analyzing trace with hash -720352397, now seen corresponding path program 385 times [2021-06-05 21:14:24,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:24,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010420170] [2021-06-05 21:14:24,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:24,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:24,148 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 70 proven. 153 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:14:24,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:24,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010420170] [2021-06-05 21:14:24,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010420170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:24,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789764431] [2021-06-05 21:14:24,148 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 625 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 625 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:24,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:24,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:14:24,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:24,268 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 70 proven. 153 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:14:24,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789764431] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:24,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:24,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-05 21:14:24,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19276444] [2021-06-05 21:14:24,268 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:14:24,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:24,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:14:24,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:14:24,269 INFO L87 Difference]: Start difference. First operand 21233 states and 55429 transitions. Second operand has 13 states, 13 states have (on average 4.769230769230769) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:24,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:24,526 INFO L93 Difference]: Finished difference Result 26094 states and 63928 transitions. [2021-06-05 21:14:24,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:14:24,526 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.769230769230769) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 21:14:24,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:24,553 INFO L225 Difference]: With dead ends: 26094 [2021-06-05 21:14:24,554 INFO L226 Difference]: Without dead ends: 26076 [2021-06-05 21:14:24,554 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 84.1ms TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:14:24,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26076 states. [2021-06-05 21:14:24,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26076 to 21233. [2021-06-05 21:14:24,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21233 states, 21232 states have (on average 2.609410324039186) internal successors, (55403), 21232 states have internal predecessors, (55403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:24,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21233 states to 21233 states and 55403 transitions. [2021-06-05 21:14:24,884 INFO L78 Accepts]: Start accepts. Automaton has 21233 states and 55403 transitions. Word has length 65 [2021-06-05 21:14:24,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:24,884 INFO L482 AbstractCegarLoop]: Abstraction has 21233 states and 55403 transitions. [2021-06-05 21:14:24,884 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.769230769230769) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:24,884 INFO L276 IsEmpty]: Start isEmpty. Operand 21233 states and 55403 transitions. [2021-06-05 21:14:24,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 21:14:24,899 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:24,900 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:25,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1338,625 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:25,100 INFO L430 AbstractCegarLoop]: === Iteration 634 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:25,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:25,100 INFO L82 PathProgramCache]: Analyzing trace with hash 2126614886, now seen corresponding path program 386 times [2021-06-05 21:14:25,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:25,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863343771] [2021-06-05 21:14:25,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:25,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:25,200 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 22 proven. 201 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:14:25,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:25,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863343771] [2021-06-05 21:14:25,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863343771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:25,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155376829] [2021-06-05 21:14:25,200 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 626 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 626 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:25,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:14:25,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:14:25,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 21:14:25,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:25,336 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 17 proven. 206 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:14:25,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155376829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:25,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:25,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 21:14:25,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543256527] [2021-06-05 21:14:25,337 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:14:25,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:25,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:14:25,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:14:25,337 INFO L87 Difference]: Start difference. First operand 21233 states and 55403 transitions. Second operand has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 12 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:26,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:26,265 INFO L93 Difference]: Finished difference Result 22551 states and 57719 transitions. [2021-06-05 21:14:26,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:14:26,265 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 12 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 21:14:26,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:26,289 INFO L225 Difference]: With dead ends: 22551 [2021-06-05 21:14:26,289 INFO L226 Difference]: Without dead ends: 22441 [2021-06-05 21:14:26,289 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 173.5ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:14:26,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22441 states. [2021-06-05 21:14:26,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22441 to 21246. [2021-06-05 21:14:26,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21246 states, 21245 states have (on average 2.604801129677571) internal successors, (55339), 21245 states have internal predecessors, (55339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:26,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21246 states to 21246 states and 55339 transitions. [2021-06-05 21:14:26,623 INFO L78 Accepts]: Start accepts. Automaton has 21246 states and 55339 transitions. Word has length 65 [2021-06-05 21:14:26,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:26,623 INFO L482 AbstractCegarLoop]: Abstraction has 21246 states and 55339 transitions. [2021-06-05 21:14:26,623 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 12 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:26,623 INFO L276 IsEmpty]: Start isEmpty. Operand 21246 states and 55339 transitions. [2021-06-05 21:14:26,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 21:14:26,638 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:26,638 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:26,838 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 626 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1341 [2021-06-05 21:14:26,838 INFO L430 AbstractCegarLoop]: === Iteration 635 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:26,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:26,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1513078706, now seen corresponding path program 387 times [2021-06-05 21:14:26,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:26,839 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187502957] [2021-06-05 21:14:26,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:26,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:26,944 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 19 proven. 202 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:14:26,945 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:26,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187502957] [2021-06-05 21:14:26,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187502957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:26,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466996532] [2021-06-05 21:14:26,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 627 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 627 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:26,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-06-05 21:14:26,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:14:26,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 21:14:26,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:27,072 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 203 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:14:27,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466996532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:27,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:27,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:14:27,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365124154] [2021-06-05 21:14:27,072 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:14:27,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:27,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:14:27,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:14:27,073 INFO L87 Difference]: Start difference. First operand 21246 states and 55339 transitions. Second operand has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:27,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:27,773 INFO L93 Difference]: Finished difference Result 23355 states and 59455 transitions. [2021-06-05 21:14:27,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:14:27,773 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 21:14:27,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:27,800 INFO L225 Difference]: With dead ends: 23355 [2021-06-05 21:14:27,800 INFO L226 Difference]: Without dead ends: 23343 [2021-06-05 21:14:27,800 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 171.0ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:14:27,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23343 states. [2021-06-05 21:14:28,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23343 to 21366. [2021-06-05 21:14:28,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21366 states, 21365 states have (on average 2.604165691551603) internal successors, (55638), 21365 states have internal predecessors, (55638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:28,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21366 states to 21366 states and 55638 transitions. [2021-06-05 21:14:28,114 INFO L78 Accepts]: Start accepts. Automaton has 21366 states and 55638 transitions. Word has length 65 [2021-06-05 21:14:28,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:28,114 INFO L482 AbstractCegarLoop]: Abstraction has 21366 states and 55638 transitions. [2021-06-05 21:14:28,114 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:28,114 INFO L276 IsEmpty]: Start isEmpty. Operand 21366 states and 55638 transitions. [2021-06-05 21:14:28,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 21:14:28,129 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:28,129 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:28,330 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 627 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1342 [2021-06-05 21:14:28,330 INFO L430 AbstractCegarLoop]: === Iteration 636 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:28,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:28,330 INFO L82 PathProgramCache]: Analyzing trace with hash -639971256, now seen corresponding path program 388 times [2021-06-05 21:14:28,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:28,330 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367798035] [2021-06-05 21:14:28,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:28,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:28,466 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 19 proven. 204 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:14:28,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:28,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367798035] [2021-06-05 21:14:28,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367798035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:28,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561681464] [2021-06-05 21:14:28,466 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 628 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 628 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:28,508 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:14:28,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:14:28,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 21:14:28,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:28,612 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 205 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:14:28,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561681464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:28,612 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:28,612 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 21:14:28,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196617145] [2021-06-05 21:14:28,613 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:14:28,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:28,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:14:28,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:14:28,613 INFO L87 Difference]: Start difference. First operand 21366 states and 55638 transitions. Second operand has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:29,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:29,545 INFO L93 Difference]: Finished difference Result 25787 states and 64793 transitions. [2021-06-05 21:14:29,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 21:14:29,545 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 21:14:29,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:29,578 INFO L225 Difference]: With dead ends: 25787 [2021-06-05 21:14:29,578 INFO L226 Difference]: Without dead ends: 25733 [2021-06-05 21:14:29,578 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 309.7ms TimeCoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 21:14:29,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25733 states. [2021-06-05 21:14:29,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25733 to 21713. [2021-06-05 21:14:29,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21713 states, 21712 states have (on average 2.6057479734708915) internal successors, (56576), 21712 states have internal predecessors, (56576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:29,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21713 states to 21713 states and 56576 transitions. [2021-06-05 21:14:29,896 INFO L78 Accepts]: Start accepts. Automaton has 21713 states and 56576 transitions. Word has length 65 [2021-06-05 21:14:29,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:29,896 INFO L482 AbstractCegarLoop]: Abstraction has 21713 states and 56576 transitions. [2021-06-05 21:14:29,896 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:29,896 INFO L276 IsEmpty]: Start isEmpty. Operand 21713 states and 56576 transitions. [2021-06-05 21:14:29,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 21:14:29,912 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:29,912 INFO L554 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:30,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 628 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1343 [2021-06-05 21:14:30,113 INFO L430 AbstractCegarLoop]: === Iteration 637 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:30,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:30,113 INFO L82 PathProgramCache]: Analyzing trace with hash 892587853, now seen corresponding path program 389 times [2021-06-05 21:14:30,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:30,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834404876] [2021-06-05 21:14:30,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:30,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:30,199 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 59 proven. 167 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:14:30,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:30,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834404876] [2021-06-05 21:14:30,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834404876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:30,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927854259] [2021-06-05 21:14:30,199 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 629 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 629 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:30,233 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-06-05 21:14:30,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:14:30,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:14:30,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:30,352 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 59 proven. 167 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:14:30,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927854259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:30,353 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:30,353 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 17 [2021-06-05 21:14:30,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662301685] [2021-06-05 21:14:30,353 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:14:30,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:30,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:14:30,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:14:30,353 INFO L87 Difference]: Start difference. First operand 21713 states and 56576 transitions. Second operand has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 17 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:30,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:30,702 INFO L93 Difference]: Finished difference Result 26779 states and 65477 transitions. [2021-06-05 21:14:30,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:14:30,702 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 17 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 21:14:30,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:30,734 INFO L225 Difference]: With dead ends: 26779 [2021-06-05 21:14:30,734 INFO L226 Difference]: Without dead ends: 26755 [2021-06-05 21:14:30,734 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 125.6ms TimeCoverageRelationStatistics Valid=123, Invalid=297, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:14:30,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26755 states. [2021-06-05 21:14:31,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26755 to 21713. [2021-06-05 21:14:31,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21713 states, 21712 states have (on average 2.604918938835667) internal successors, (56558), 21712 states have internal predecessors, (56558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:31,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21713 states to 21713 states and 56558 transitions. [2021-06-05 21:14:31,124 INFO L78 Accepts]: Start accepts. Automaton has 21713 states and 56558 transitions. Word has length 65 [2021-06-05 21:14:31,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:31,124 INFO L482 AbstractCegarLoop]: Abstraction has 21713 states and 56558 transitions. [2021-06-05 21:14:31,124 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 17 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:31,124 INFO L276 IsEmpty]: Start isEmpty. Operand 21713 states and 56558 transitions. [2021-06-05 21:14:31,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 21:14:31,139 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:31,139 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:31,339 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1344,629 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:31,339 INFO L430 AbstractCegarLoop]: === Iteration 638 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:31,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:31,340 INFO L82 PathProgramCache]: Analyzing trace with hash -485134722, now seen corresponding path program 390 times [2021-06-05 21:14:31,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:31,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122391249] [2021-06-05 21:14:31,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:31,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:31,458 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 19 proven. 204 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:14:31,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:31,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122391249] [2021-06-05 21:14:31,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122391249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:31,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084132293] [2021-06-05 21:14:31,458 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 630 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 630 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:31,494 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2021-06-05 21:14:31,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:14:31,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 21:14:31,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:31,589 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 205 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:14:31,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084132293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:31,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:31,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:14:31,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233790893] [2021-06-05 21:14:31,589 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:14:31,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:31,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:14:31,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:14:31,589 INFO L87 Difference]: Start difference. First operand 21713 states and 56558 transitions. Second operand has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 14 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:32,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:32,906 INFO L93 Difference]: Finished difference Result 30965 states and 76348 transitions. [2021-06-05 21:14:32,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 21:14:32,906 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 14 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 21:14:32,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:32,941 INFO L225 Difference]: With dead ends: 30965 [2021-06-05 21:14:32,941 INFO L226 Difference]: Without dead ends: 30797 [2021-06-05 21:14:32,942 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 519.8ms TimeCoverageRelationStatistics Valid=285, Invalid=2471, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 21:14:32,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30797 states. [2021-06-05 21:14:33,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30797 to 22408. [2021-06-05 21:14:33,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22408 states, 22407 states have (on average 2.60543580131209) internal successors, (58380), 22407 states have internal predecessors, (58380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:33,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22408 states to 22408 states and 58380 transitions. [2021-06-05 21:14:33,306 INFO L78 Accepts]: Start accepts. Automaton has 22408 states and 58380 transitions. Word has length 65 [2021-06-05 21:14:33,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:33,306 INFO L482 AbstractCegarLoop]: Abstraction has 22408 states and 58380 transitions. [2021-06-05 21:14:33,306 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 14 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:33,306 INFO L276 IsEmpty]: Start isEmpty. Operand 22408 states and 58380 transitions. [2021-06-05 21:14:33,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 21:14:33,320 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:33,320 INFO L554 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:33,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1348,630 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:33,521 INFO L430 AbstractCegarLoop]: === Iteration 639 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:33,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:33,521 INFO L82 PathProgramCache]: Analyzing trace with hash -98532045, now seen corresponding path program 391 times [2021-06-05 21:14:33,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:33,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513958676] [2021-06-05 21:14:33,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:33,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:33,616 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 54 proven. 172 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:14:33,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:33,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513958676] [2021-06-05 21:14:33,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513958676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:33,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210860682] [2021-06-05 21:14:33,616 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 631 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 631 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:33,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:33,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:14:33,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:33,739 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 54 proven. 172 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:14:33,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210860682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:33,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:33,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-05 21:14:33,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648728312] [2021-06-05 21:14:33,740 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:14:33,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:33,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:14:33,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:14:33,740 INFO L87 Difference]: Start difference. First operand 22408 states and 58380 transitions. Second operand has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 14 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:34,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:34,033 INFO L93 Difference]: Finished difference Result 27475 states and 67252 transitions. [2021-06-05 21:14:34,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:14:34,034 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 14 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 21:14:34,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:34,066 INFO L225 Difference]: With dead ends: 27475 [2021-06-05 21:14:34,067 INFO L226 Difference]: Without dead ends: 27442 [2021-06-05 21:14:34,067 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 113.4ms TimeCoverageRelationStatistics Valid=114, Invalid=228, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:14:34,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27442 states. [2021-06-05 21:14:34,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27442 to 22408. [2021-06-05 21:14:34,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22408 states, 22407 states have (on average 2.605034141116615) internal successors, (58371), 22407 states have internal predecessors, (58371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:34,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22408 states to 22408 states and 58371 transitions. [2021-06-05 21:14:34,398 INFO L78 Accepts]: Start accepts. Automaton has 22408 states and 58371 transitions. Word has length 65 [2021-06-05 21:14:34,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:34,398 INFO L482 AbstractCegarLoop]: Abstraction has 22408 states and 58371 transitions. [2021-06-05 21:14:34,398 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 14 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:34,398 INFO L276 IsEmpty]: Start isEmpty. Operand 22408 states and 58371 transitions. [2021-06-05 21:14:34,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 21:14:34,412 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:34,412 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:34,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 631 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1349 [2021-06-05 21:14:34,612 INFO L430 AbstractCegarLoop]: === Iteration 640 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:34,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:34,612 INFO L82 PathProgramCache]: Analyzing trace with hash -544826232, now seen corresponding path program 392 times [2021-06-05 21:14:34,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:34,612 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681164090] [2021-06-05 21:14:34,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:34,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:34,744 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 19 proven. 204 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:14:34,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:34,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681164090] [2021-06-05 21:14:34,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681164090] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:34,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748906002] [2021-06-05 21:14:34,745 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 632 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 632 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:34,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:14:34,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:14:34,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 21:14:34,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:34,866 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 205 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:14:34,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748906002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:34,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:34,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 21:14:34,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398124557] [2021-06-05 21:14:34,867 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:14:34,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:34,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:14:34,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:14:34,867 INFO L87 Difference]: Start difference. First operand 22408 states and 58371 transitions. Second operand has 16 states, 16 states have (on average 4.0625) internal successors, (65), 15 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:36,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:36,767 INFO L93 Difference]: Finished difference Result 41984 states and 101118 transitions. [2021-06-05 21:14:36,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-06-05 21:14:36,768 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.0625) internal successors, (65), 15 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 21:14:36,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:36,817 INFO L225 Difference]: With dead ends: 41984 [2021-06-05 21:14:36,817 INFO L226 Difference]: Without dead ends: 41462 [2021-06-05 21:14:36,817 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2412 ImplicationChecksByTransitivity, 966.0ms TimeCoverageRelationStatistics Valid=663, Invalid=6477, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 21:14:36,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41462 states. [2021-06-05 21:14:37,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41462 to 23564. [2021-06-05 21:14:37,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23564 states, 23563 states have (on average 2.604252429656665) internal successors, (61364), 23563 states have internal predecessors, (61364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:37,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23564 states to 23564 states and 61364 transitions. [2021-06-05 21:14:37,253 INFO L78 Accepts]: Start accepts. Automaton has 23564 states and 61364 transitions. Word has length 65 [2021-06-05 21:14:37,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:37,253 INFO L482 AbstractCegarLoop]: Abstraction has 23564 states and 61364 transitions. [2021-06-05 21:14:37,253 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.0625) internal successors, (65), 15 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:37,253 INFO L276 IsEmpty]: Start isEmpty. Operand 23564 states and 61364 transitions. [2021-06-05 21:14:37,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 21:14:37,268 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:37,268 INFO L554 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:37,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 632 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1354 [2021-06-05 21:14:37,468 INFO L430 AbstractCegarLoop]: === Iteration 641 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:37,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:37,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1348746637, now seen corresponding path program 393 times [2021-06-05 21:14:37,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:37,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74824915] [2021-06-05 21:14:37,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:37,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:37,574 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 55 proven. 171 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:14:37,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:37,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74824915] [2021-06-05 21:14:37,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74824915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:37,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827550339] [2021-06-05 21:14:37,575 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 633 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 633 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:37,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-06-05 21:14:37,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:14:37,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:14:37,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:37,704 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 55 proven. 171 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:14:37,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827550339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:37,704 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:37,704 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-06-05 21:14:37,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064143434] [2021-06-05 21:14:37,704 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:14:37,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:37,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:14:37,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:14:37,705 INFO L87 Difference]: Start difference. First operand 23564 states and 61364 transitions. Second operand has 16 states, 16 states have (on average 4.0) internal successors, (64), 15 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:38,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:38,012 INFO L93 Difference]: Finished difference Result 28863 states and 70675 transitions. [2021-06-05 21:14:38,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:14:38,012 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.0) internal successors, (64), 15 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 21:14:38,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:38,049 INFO L225 Difference]: With dead ends: 28863 [2021-06-05 21:14:38,049 INFO L226 Difference]: Without dead ends: 28821 [2021-06-05 21:14:38,049 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 134.0ms TimeCoverageRelationStatistics Valid=134, Invalid=286, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:14:38,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28821 states. [2021-06-05 21:14:38,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28821 to 23564. [2021-06-05 21:14:38,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23564 states, 23563 states have (on average 2.6038704748970845) internal successors, (61355), 23563 states have internal predecessors, (61355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:38,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23564 states to 23564 states and 61355 transitions. [2021-06-05 21:14:38,396 INFO L78 Accepts]: Start accepts. Automaton has 23564 states and 61355 transitions. Word has length 65 [2021-06-05 21:14:38,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:38,396 INFO L482 AbstractCegarLoop]: Abstraction has 23564 states and 61355 transitions. [2021-06-05 21:14:38,396 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.0) internal successors, (64), 15 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:38,396 INFO L276 IsEmpty]: Start isEmpty. Operand 23564 states and 61355 transitions. [2021-06-05 21:14:38,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 21:14:38,412 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:38,412 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:38,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 633 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1355 [2021-06-05 21:14:38,612 INFO L430 AbstractCegarLoop]: === Iteration 642 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:38,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:38,612 INFO L82 PathProgramCache]: Analyzing trace with hash -698140098, now seen corresponding path program 394 times [2021-06-05 21:14:38,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:38,612 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349482387] [2021-06-05 21:14:38,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:38,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:38,762 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 19 proven. 204 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:14:38,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:38,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349482387] [2021-06-05 21:14:38,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349482387] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:38,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703942934] [2021-06-05 21:14:38,763 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 634 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 634 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:38,792 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:14:38,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:14:38,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 21:14:38,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:38,885 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 205 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:14:38,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703942934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:38,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:38,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-06-05 21:14:38,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448111680] [2021-06-05 21:14:38,885 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:14:38,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:38,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:14:38,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:14:38,886 INFO L87 Difference]: Start difference. First operand 23564 states and 61355 transitions. Second operand has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 16 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:41,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:41,698 INFO L93 Difference]: Finished difference Result 53425 states and 127611 transitions. [2021-06-05 21:14:41,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2021-06-05 21:14:41,698 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 16 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 21:14:41,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:41,754 INFO L225 Difference]: With dead ends: 53425 [2021-06-05 21:14:41,754 INFO L226 Difference]: Without dead ends: 52807 [2021-06-05 21:14:41,755 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6795 ImplicationChecksByTransitivity, 1750.2ms TimeCoverageRelationStatistics Valid=1473, Invalid=16083, Unknown=0, NotChecked=0, Total=17556 [2021-06-05 21:14:41,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52807 states. [2021-06-05 21:14:42,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52807 to 24483. [2021-06-05 21:14:42,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24483 states, 24482 states have (on average 2.6029327669308064) internal successors, (63725), 24482 states have internal predecessors, (63725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:42,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24483 states to 24483 states and 63725 transitions. [2021-06-05 21:14:42,241 INFO L78 Accepts]: Start accepts. Automaton has 24483 states and 63725 transitions. Word has length 65 [2021-06-05 21:14:42,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:42,241 INFO L482 AbstractCegarLoop]: Abstraction has 24483 states and 63725 transitions. [2021-06-05 21:14:42,242 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 16 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:42,242 INFO L276 IsEmpty]: Start isEmpty. Operand 24483 states and 63725 transitions. [2021-06-05 21:14:42,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 21:14:42,256 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:42,256 INFO L554 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:42,457 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1361,634 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:42,457 INFO L430 AbstractCegarLoop]: === Iteration 643 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:42,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:42,457 INFO L82 PathProgramCache]: Analyzing trace with hash 51277555, now seen corresponding path program 395 times [2021-06-05 21:14:42,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:42,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228292444] [2021-06-05 21:14:42,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:42,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:42,575 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 62 proven. 164 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:14:42,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:42,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228292444] [2021-06-05 21:14:42,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228292444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:42,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829903744] [2021-06-05 21:14:42,575 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 635 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 635 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:42,607 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 21:14:42,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:14:42,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:14:42,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:42,753 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 62 proven. 164 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:14:42,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829903744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:42,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:42,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 20 [2021-06-05 21:14:42,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356112218] [2021-06-05 21:14:42,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:14:42,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:42,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:14:42,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:14:42,754 INFO L87 Difference]: Start difference. First operand 24483 states and 63725 transitions. Second operand has 21 states, 21 states have (on average 4.190476190476191) internal successors, (88), 20 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:43,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:43,133 INFO L93 Difference]: Finished difference Result 30034 states and 73553 transitions. [2021-06-05 21:14:43,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:14:43,134 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.190476190476191) internal successors, (88), 20 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 21:14:43,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:43,169 INFO L225 Difference]: With dead ends: 30034 [2021-06-05 21:14:43,169 INFO L226 Difference]: Without dead ends: 29983 [2021-06-05 21:14:43,169 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 192.6ms TimeCoverageRelationStatistics Valid=183, Invalid=519, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:14:43,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29983 states. [2021-06-05 21:14:43,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29983 to 24023. [2021-06-05 21:14:43,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24023 states, 24022 states have (on average 2.59903421863292) internal successors, (62434), 24022 states have internal predecessors, (62434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:43,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24023 states to 24023 states and 62434 transitions. [2021-06-05 21:14:43,517 INFO L78 Accepts]: Start accepts. Automaton has 24023 states and 62434 transitions. Word has length 65 [2021-06-05 21:14:43,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:43,517 INFO L482 AbstractCegarLoop]: Abstraction has 24023 states and 62434 transitions. [2021-06-05 21:14:43,517 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 4.190476190476191) internal successors, (88), 20 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:43,518 INFO L276 IsEmpty]: Start isEmpty. Operand 24023 states and 62434 transitions. [2021-06-05 21:14:43,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 21:14:43,532 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:43,532 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:43,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1362,635 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:43,732 INFO L430 AbstractCegarLoop]: === Iteration 644 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:43,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:43,732 INFO L82 PathProgramCache]: Analyzing trace with hash 1773680840, now seen corresponding path program 396 times [2021-06-05 21:14:43,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:43,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174251044] [2021-06-05 21:14:43,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:43,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:43,937 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 207 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:14:43,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:43,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174251044] [2021-06-05 21:14:43,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174251044] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:43,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048366491] [2021-06-05 21:14:43,938 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 636 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 636 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:43,977 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-06-05 21:14:43,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:14:43,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 21:14:43,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:44,070 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 207 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:14:44,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048366491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:44,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:44,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-06-05 21:14:44,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041159838] [2021-06-05 21:14:44,071 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:14:44,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:44,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:14:44,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:14:44,071 INFO L87 Difference]: Start difference. First operand 24023 states and 62434 transitions. Second operand has 18 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 17 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:45,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:45,137 INFO L93 Difference]: Finished difference Result 34769 states and 84689 transitions. [2021-06-05 21:14:45,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 21:14:45,138 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 17 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 21:14:45,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:45,181 INFO L225 Difference]: With dead ends: 34769 [2021-06-05 21:14:45,181 INFO L226 Difference]: Without dead ends: 33929 [2021-06-05 21:14:45,181 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 447.5ms TimeCoverageRelationStatistics Valid=187, Invalid=1145, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 21:14:45,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33929 states. [2021-06-05 21:14:45,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33929 to 20717. [2021-06-05 21:14:45,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20717 states, 20716 states have (on average 2.5939370534852286) internal successors, (53736), 20716 states have internal predecessors, (53736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:45,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20717 states to 20717 states and 53736 transitions. [2021-06-05 21:14:45,535 INFO L78 Accepts]: Start accepts. Automaton has 20717 states and 53736 transitions. Word has length 65 [2021-06-05 21:14:45,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:45,535 INFO L482 AbstractCegarLoop]: Abstraction has 20717 states and 53736 transitions. [2021-06-05 21:14:45,535 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 17 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:45,535 INFO L276 IsEmpty]: Start isEmpty. Operand 20717 states and 53736 transitions. [2021-06-05 21:14:45,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 21:14:45,550 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:45,550 INFO L554 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:45,751 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 636 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1369 [2021-06-05 21:14:45,751 INFO L430 AbstractCegarLoop]: === Iteration 645 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:45,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:45,751 INFO L82 PathProgramCache]: Analyzing trace with hash 1535619323, now seen corresponding path program 190 times [2021-06-05 21:14:45,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:45,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64355638] [2021-06-05 21:14:45,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:45,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:45,829 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 175 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:14:45,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:45,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64355638] [2021-06-05 21:14:45,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64355638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:45,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553515366] [2021-06-05 21:14:45,830 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 637 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 637 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:45,858 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:14:45,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:14:45,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:14:45,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:45,955 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 176 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:45,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553515366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:45,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:45,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-06-05 21:14:45,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374197695] [2021-06-05 21:14:45,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:14:45,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:45,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:14:45,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=105, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:14:45,956 INFO L87 Difference]: Start difference. First operand 20717 states and 53736 transitions. Second operand has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:46,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:46,295 INFO L93 Difference]: Finished difference Result 25901 states and 64415 transitions. [2021-06-05 21:14:46,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:14:46,295 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 21:14:46,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:46,332 INFO L225 Difference]: With dead ends: 25901 [2021-06-05 21:14:46,332 INFO L226 Difference]: Without dead ends: 25881 [2021-06-05 21:14:46,332 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 81.3ms TimeCoverageRelationStatistics Valid=97, Invalid=143, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:14:46,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25881 states. [2021-06-05 21:14:46,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25881 to 21398. [2021-06-05 21:14:46,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21398 states, 21397 states have (on average 2.5984951161377765) internal successors, (55600), 21397 states have internal predecessors, (55600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:46,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21398 states to 21398 states and 55600 transitions. [2021-06-05 21:14:46,667 INFO L78 Accepts]: Start accepts. Automaton has 21398 states and 55600 transitions. Word has length 65 [2021-06-05 21:14:46,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:46,668 INFO L482 AbstractCegarLoop]: Abstraction has 21398 states and 55600 transitions. [2021-06-05 21:14:46,668 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:46,668 INFO L276 IsEmpty]: Start isEmpty. Operand 21398 states and 55600 transitions. [2021-06-05 21:14:46,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 21:14:46,682 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:46,682 INFO L554 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:46,882 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1370,637 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:46,882 INFO L430 AbstractCegarLoop]: === Iteration 646 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:46,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:46,882 INFO L82 PathProgramCache]: Analyzing trace with hash 913738913, now seen corresponding path program 191 times [2021-06-05 21:14:46,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:46,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282506589] [2021-06-05 21:14:46,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:46,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:46,960 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 175 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:14:46,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:46,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282506589] [2021-06-05 21:14:46,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282506589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:46,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187547430] [2021-06-05 21:14:46,960 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 638 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 638 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:46,997 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-06-05 21:14:46,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:14:46,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:14:46,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:47,215 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 177 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:47,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187547430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:47,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:47,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 22] total 24 [2021-06-05 21:14:47,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705348437] [2021-06-05 21:14:47,215 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:14:47,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:47,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:14:47,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=365, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:14:47,216 INFO L87 Difference]: Start difference. First operand 21398 states and 55600 transitions. Second operand has 25 states, 25 states have (on average 3.84) internal successors, (96), 24 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:47,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:47,988 INFO L93 Difference]: Finished difference Result 34523 states and 84310 transitions. [2021-06-05 21:14:47,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 21:14:47,989 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.84) internal successors, (96), 24 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 21:14:47,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:48,027 INFO L225 Difference]: With dead ends: 34523 [2021-06-05 21:14:48,027 INFO L226 Difference]: Without dead ends: 34523 [2021-06-05 21:14:48,027 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 389.0ms TimeCoverageRelationStatistics Valid=591, Invalid=891, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 21:14:48,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34523 states. [2021-06-05 21:14:48,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34523 to 21413. [2021-06-05 21:14:48,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21413 states, 21412 states have (on average 2.5987763870726694) internal successors, (55645), 21412 states have internal predecessors, (55645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:48,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21413 states to 21413 states and 55645 transitions. [2021-06-05 21:14:48,419 INFO L78 Accepts]: Start accepts. Automaton has 21413 states and 55645 transitions. Word has length 65 [2021-06-05 21:14:48,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:48,420 INFO L482 AbstractCegarLoop]: Abstraction has 21413 states and 55645 transitions. [2021-06-05 21:14:48,420 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 3.84) internal successors, (96), 24 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:48,420 INFO L276 IsEmpty]: Start isEmpty. Operand 21413 states and 55645 transitions. [2021-06-05 21:14:48,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 21:14:48,438 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:48,438 INFO L554 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:48,638 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1372,638 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:48,639 INFO L430 AbstractCegarLoop]: === Iteration 647 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:48,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:48,639 INFO L82 PathProgramCache]: Analyzing trace with hash -723833543, now seen corresponding path program 192 times [2021-06-05 21:14:48,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:48,639 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142639497] [2021-06-05 21:14:48,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:48,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:48,727 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 173 proven. 53 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:14:48,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:48,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142639497] [2021-06-05 21:14:48,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142639497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:48,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357663281] [2021-06-05 21:14:48,728 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 639 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 639 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:48,764 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-06-05 21:14:48,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:14:48,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:14:48,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:48,869 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 174 proven. 53 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:14:48,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357663281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:48,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:48,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 14 [2021-06-05 21:14:48,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297800802] [2021-06-05 21:14:48,870 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:14:48,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:48,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:14:48,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:14:48,870 INFO L87 Difference]: Start difference. First operand 21413 states and 55645 transitions. Second operand has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:49,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:49,298 INFO L93 Difference]: Finished difference Result 36708 states and 89413 transitions. [2021-06-05 21:14:49,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:14:49,298 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 21:14:49,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:49,343 INFO L225 Difference]: With dead ends: 36708 [2021-06-05 21:14:49,344 INFO L226 Difference]: Without dead ends: 36708 [2021-06-05 21:14:49,344 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 177.9ms TimeCoverageRelationStatistics Valid=259, Invalid=391, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:14:49,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36708 states. [2021-06-05 21:14:49,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36708 to 21464. [2021-06-05 21:14:49,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21464 states, 21463 states have (on average 2.600288869216792) internal successors, (55810), 21463 states have internal predecessors, (55810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:49,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21464 states to 21464 states and 55810 transitions. [2021-06-05 21:14:49,734 INFO L78 Accepts]: Start accepts. Automaton has 21464 states and 55810 transitions. Word has length 65 [2021-06-05 21:14:49,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:49,734 INFO L482 AbstractCegarLoop]: Abstraction has 21464 states and 55810 transitions. [2021-06-05 21:14:49,734 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:49,734 INFO L276 IsEmpty]: Start isEmpty. Operand 21464 states and 55810 transitions. [2021-06-05 21:14:49,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 21:14:49,748 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:49,748 INFO L554 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:49,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1373,639 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:49,948 INFO L430 AbstractCegarLoop]: === Iteration 648 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:49,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:49,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1881138589, now seen corresponding path program 193 times [2021-06-05 21:14:49,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:49,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134446216] [2021-06-05 21:14:49,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:49,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:50,047 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 163 proven. 63 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:14:50,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:50,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134446216] [2021-06-05 21:14:50,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134446216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:50,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453552442] [2021-06-05 21:14:50,048 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 640 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 640 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:50,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:50,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:14:50,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:50,180 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 164 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:14:50,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453552442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:50,180 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:50,180 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 15 [2021-06-05 21:14:50,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676218918] [2021-06-05 21:14:50,180 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:14:50,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:50,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:14:50,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:14:50,181 INFO L87 Difference]: Start difference. First operand 21464 states and 55810 transitions. Second operand has 16 states, 16 states have (on average 4.3125) internal successors, (69), 15 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:50,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:50,738 INFO L93 Difference]: Finished difference Result 37797 states and 91974 transitions. [2021-06-05 21:14:50,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 21:14:50,739 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.3125) internal successors, (69), 15 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 21:14:50,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:50,781 INFO L225 Difference]: With dead ends: 37797 [2021-06-05 21:14:50,781 INFO L226 Difference]: Without dead ends: 37797 [2021-06-05 21:14:50,782 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 220.2ms TimeCoverageRelationStatistics Valid=338, Invalid=532, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:14:50,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37797 states. [2021-06-05 21:14:51,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37797 to 21524. [2021-06-05 21:14:51,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21524 states, 21523 states have (on average 2.601960693211913) internal successors, (56002), 21523 states have internal predecessors, (56002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:51,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21524 states to 21524 states and 56002 transitions. [2021-06-05 21:14:51,139 INFO L78 Accepts]: Start accepts. Automaton has 21524 states and 56002 transitions. Word has length 65 [2021-06-05 21:14:51,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:51,140 INFO L482 AbstractCegarLoop]: Abstraction has 21524 states and 56002 transitions. [2021-06-05 21:14:51,140 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.3125) internal successors, (69), 15 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:51,140 INFO L276 IsEmpty]: Start isEmpty. Operand 21524 states and 56002 transitions. [2021-06-05 21:14:51,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 21:14:51,154 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:51,154 INFO L554 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:51,355 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 640 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1374 [2021-06-05 21:14:51,355 INFO L430 AbstractCegarLoop]: === Iteration 649 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:51,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:51,355 INFO L82 PathProgramCache]: Analyzing trace with hash 841851577, now seen corresponding path program 194 times [2021-06-05 21:14:51,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:51,355 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575903078] [2021-06-05 21:14:51,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:51,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:51,464 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 153 proven. 73 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:14:51,464 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:51,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575903078] [2021-06-05 21:14:51,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575903078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:51,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703713587] [2021-06-05 21:14:51,465 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 641 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 641 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:51,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:14:51,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:14:51,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:14:51,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:51,597 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 154 proven. 73 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:14:51,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703713587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:51,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:51,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 16 [2021-06-05 21:14:51,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221860124] [2021-06-05 21:14:51,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:14:51,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:51,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:14:51,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:14:51,598 INFO L87 Difference]: Start difference. First operand 21524 states and 56002 transitions. Second operand has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 16 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:52,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:52,157 INFO L93 Difference]: Finished difference Result 36105 states and 88048 transitions. [2021-06-05 21:14:52,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 21:14:52,158 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 16 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 21:14:52,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:52,204 INFO L225 Difference]: With dead ends: 36105 [2021-06-05 21:14:52,204 INFO L226 Difference]: Without dead ends: 36105 [2021-06-05 21:14:52,205 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 244.9ms TimeCoverageRelationStatistics Valid=381, Invalid=611, Unknown=0, NotChecked=0, Total=992 [2021-06-05 21:14:52,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36105 states. [2021-06-05 21:14:52,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36105 to 21553. [2021-06-05 21:14:52,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21553 states, 21552 states have (on average 2.6023106904231628) internal successors, (56085), 21552 states have internal predecessors, (56085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:52,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21553 states to 21553 states and 56085 transitions. [2021-06-05 21:14:52,589 INFO L78 Accepts]: Start accepts. Automaton has 21553 states and 56085 transitions. Word has length 65 [2021-06-05 21:14:52,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:52,589 INFO L482 AbstractCegarLoop]: Abstraction has 21553 states and 56085 transitions. [2021-06-05 21:14:52,589 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 16 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:52,589 INFO L276 IsEmpty]: Start isEmpty. Operand 21553 states and 56085 transitions. [2021-06-05 21:14:52,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 21:14:52,605 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:52,605 INFO L554 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:52,805 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 641 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1375 [2021-06-05 21:14:52,805 INFO L430 AbstractCegarLoop]: === Iteration 650 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:52,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:52,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1861713949, now seen corresponding path program 195 times [2021-06-05 21:14:52,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:52,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276204153] [2021-06-05 21:14:52,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:52,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:52,929 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 143 proven. 83 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:14:52,929 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:52,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276204153] [2021-06-05 21:14:52,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276204153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:52,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567855352] [2021-06-05 21:14:52,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 642 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 642 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:52,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-06-05 21:14:52,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:14:52,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:14:52,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:53,132 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 184 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:14:53,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567855352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:53,132 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:53,132 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 22 [2021-06-05 21:14:53,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92420869] [2021-06-05 21:14:53,132 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 21:14:53,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:53,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 21:14:53,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=336, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:14:53,133 INFO L87 Difference]: Start difference. First operand 21553 states and 56085 transitions. Second operand has 23 states, 23 states have (on average 3.5217391304347827) internal successors, (81), 22 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:53,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:53,621 INFO L93 Difference]: Finished difference Result 25993 states and 64689 transitions. [2021-06-05 21:14:53,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:14:53,621 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.5217391304347827) internal successors, (81), 22 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 21:14:53,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:53,654 INFO L225 Difference]: With dead ends: 25993 [2021-06-05 21:14:53,654 INFO L226 Difference]: Without dead ends: 25993 [2021-06-05 21:14:53,655 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 247.8ms TimeCoverageRelationStatistics Valid=288, Invalid=524, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:14:53,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25993 states. [2021-06-05 21:14:53,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25993 to 20708. [2021-06-05 21:14:53,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20708 states, 20707 states have (on average 2.595257642343169) internal successors, (53740), 20707 states have internal predecessors, (53740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:53,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20708 states to 20708 states and 53740 transitions. [2021-06-05 21:14:53,962 INFO L78 Accepts]: Start accepts. Automaton has 20708 states and 53740 transitions. Word has length 65 [2021-06-05 21:14:53,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:53,962 INFO L482 AbstractCegarLoop]: Abstraction has 20708 states and 53740 transitions. [2021-06-05 21:14:53,962 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.5217391304347827) internal successors, (81), 22 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:53,963 INFO L276 IsEmpty]: Start isEmpty. Operand 20708 states and 53740 transitions. [2021-06-05 21:14:53,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 21:14:53,978 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:53,978 INFO L554 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:54,178 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 642 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1376 [2021-06-05 21:14:54,179 INFO L430 AbstractCegarLoop]: === Iteration 651 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:54,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:54,179 INFO L82 PathProgramCache]: Analyzing trace with hash 1855519693, now seen corresponding path program 397 times [2021-06-05 21:14:54,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:54,179 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418238849] [2021-06-05 21:14:54,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:54,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:54,308 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 76 proven. 151 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:14:54,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:54,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418238849] [2021-06-05 21:14:54,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418238849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:54,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291935332] [2021-06-05 21:14:54,308 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 643 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 643 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:54,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:54,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:14:54,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:54,434 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 76 proven. 151 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:14:54,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291935332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:54,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:54,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-06-05 21:14:54,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999620786] [2021-06-05 21:14:54,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:14:54,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:54,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:14:54,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:14:54,435 INFO L87 Difference]: Start difference. First operand 20708 states and 53740 transitions. Second operand has 18 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 17 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:54,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:54,801 INFO L93 Difference]: Finished difference Result 25213 states and 61593 transitions. [2021-06-05 21:14:54,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:14:54,801 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 17 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 21:14:54,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:54,832 INFO L225 Difference]: With dead ends: 25213 [2021-06-05 21:14:54,832 INFO L226 Difference]: Without dead ends: 25159 [2021-06-05 21:14:54,832 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 180.3ms TimeCoverageRelationStatistics Valid=180, Invalid=420, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:14:54,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25159 states. [2021-06-05 21:14:55,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25159 to 20708. [2021-06-05 21:14:55,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20708 states, 20707 states have (on average 2.594823006712706) internal successors, (53731), 20707 states have internal predecessors, (53731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:55,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20708 states to 20708 states and 53731 transitions. [2021-06-05 21:14:55,191 INFO L78 Accepts]: Start accepts. Automaton has 20708 states and 53731 transitions. Word has length 65 [2021-06-05 21:14:55,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:55,191 INFO L482 AbstractCegarLoop]: Abstraction has 20708 states and 53731 transitions. [2021-06-05 21:14:55,191 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 17 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:55,191 INFO L276 IsEmpty]: Start isEmpty. Operand 20708 states and 53731 transitions. [2021-06-05 21:14:55,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 21:14:55,204 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:55,204 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:55,405 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 643 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1379 [2021-06-05 21:14:55,405 INFO L430 AbstractCegarLoop]: === Iteration 652 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:55,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:55,405 INFO L82 PathProgramCache]: Analyzing trace with hash 2136980874, now seen corresponding path program 196 times [2021-06-05 21:14:55,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:55,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133097680] [2021-06-05 21:14:55,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:55,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:55,510 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 10 proven. 213 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:14:55,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:55,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133097680] [2021-06-05 21:14:55,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133097680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:55,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762266753] [2021-06-05 21:14:55,511 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 644 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 644 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:55,539 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:14:55,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:14:55,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 21:14:55,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:55,632 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 9 proven. 214 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:14:55,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762266753] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:55,632 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:55,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:14:55,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796487896] [2021-06-05 21:14:55,632 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:14:55,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:55,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:14:55,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:14:55,633 INFO L87 Difference]: Start difference. First operand 20708 states and 53731 transitions. Second operand has 13 states, 13 states have (on average 5.0) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:56,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:56,342 INFO L93 Difference]: Finished difference Result 22901 states and 58040 transitions. [2021-06-05 21:14:56,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:14:56,343 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 21:14:56,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:56,368 INFO L225 Difference]: With dead ends: 22901 [2021-06-05 21:14:56,368 INFO L226 Difference]: Without dead ends: 22879 [2021-06-05 21:14:56,368 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 170.5ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:14:56,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22879 states. [2021-06-05 21:14:56,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22879 to 21011. [2021-06-05 21:14:56,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21011 states, 21010 states have (on average 2.5923845787720134) internal successors, (54466), 21010 states have internal predecessors, (54466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:56,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21011 states to 21011 states and 54466 transitions. [2021-06-05 21:14:56,653 INFO L78 Accepts]: Start accepts. Automaton has 21011 states and 54466 transitions. Word has length 65 [2021-06-05 21:14:56,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:56,653 INFO L482 AbstractCegarLoop]: Abstraction has 21011 states and 54466 transitions. [2021-06-05 21:14:56,653 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:56,653 INFO L276 IsEmpty]: Start isEmpty. Operand 21011 states and 54466 transitions. [2021-06-05 21:14:56,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 21:14:56,668 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:56,668 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:56,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 644 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1387 [2021-06-05 21:14:56,868 INFO L430 AbstractCegarLoop]: === Iteration 653 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:56,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:56,868 INFO L82 PathProgramCache]: Analyzing trace with hash -657653430, now seen corresponding path program 398 times [2021-06-05 21:14:56,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:56,868 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385635784] [2021-06-05 21:14:56,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:56,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:56,966 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 22 proven. 201 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:14:56,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:56,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385635784] [2021-06-05 21:14:56,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385635784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:56,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027473020] [2021-06-05 21:14:56,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 645 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 645 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:56,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:14:56,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:14:56,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 21:14:56,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:57,098 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 17 proven. 206 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:14:57,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027473020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:57,098 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:57,098 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 21:14:57,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261881081] [2021-06-05 21:14:57,098 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:14:57,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:57,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:14:57,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:14:57,098 INFO L87 Difference]: Start difference. First operand 21011 states and 54466 transitions. Second operand has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 12 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:57,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:57,968 INFO L93 Difference]: Finished difference Result 22325 states and 56767 transitions. [2021-06-05 21:14:57,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:14:57,968 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 12 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 21:14:57,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:57,993 INFO L225 Difference]: With dead ends: 22325 [2021-06-05 21:14:57,994 INFO L226 Difference]: Without dead ends: 22197 [2021-06-05 21:14:57,994 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 171.8ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:14:58,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22197 states. [2021-06-05 21:14:58,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22197 to 21057. [2021-06-05 21:14:58,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21057 states, 21056 states have (on average 2.585723784194529) internal successors, (54445), 21056 states have internal predecessors, (54445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:58,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21057 states to 21057 states and 54445 transitions. [2021-06-05 21:14:58,279 INFO L78 Accepts]: Start accepts. Automaton has 21057 states and 54445 transitions. Word has length 65 [2021-06-05 21:14:58,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:58,280 INFO L482 AbstractCegarLoop]: Abstraction has 21057 states and 54445 transitions. [2021-06-05 21:14:58,280 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 12 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:58,280 INFO L276 IsEmpty]: Start isEmpty. Operand 21057 states and 54445 transitions. [2021-06-05 21:14:58,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 21:14:58,295 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:58,295 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:58,495 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 645 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1388 [2021-06-05 21:14:58,495 INFO L430 AbstractCegarLoop]: === Iteration 654 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:58,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:58,495 INFO L82 PathProgramCache]: Analyzing trace with hash -1271189610, now seen corresponding path program 399 times [2021-06-05 21:14:58,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:58,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737559747] [2021-06-05 21:14:58,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:58,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:58,603 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 19 proven. 202 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:14:58,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:58,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737559747] [2021-06-05 21:14:58,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737559747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:58,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765681133] [2021-06-05 21:14:58,604 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 646 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 646 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:58,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-06-05 21:14:58,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:14:58,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 21:14:58,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:58,735 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 203 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:14:58,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765681133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:58,735 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:58,735 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:14:58,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858119669] [2021-06-05 21:14:58,735 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:14:58,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:58,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:14:58,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:14:58,735 INFO L87 Difference]: Start difference. First operand 21057 states and 54445 transitions. Second operand has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:59,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:59,398 INFO L93 Difference]: Finished difference Result 23159 states and 58564 transitions. [2021-06-05 21:14:59,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:14:59,398 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 21:14:59,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:59,422 INFO L225 Difference]: With dead ends: 23159 [2021-06-05 21:14:59,422 INFO L226 Difference]: Without dead ends: 23147 [2021-06-05 21:14:59,422 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 175.6ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:14:59,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23147 states. [2021-06-05 21:14:59,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23147 to 21201. [2021-06-05 21:14:59,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21201 states, 21200 states have (on average 2.5853301886792455) internal successors, (54809), 21200 states have internal predecessors, (54809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:59,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21201 states to 21201 states and 54809 transitions. [2021-06-05 21:14:59,807 INFO L78 Accepts]: Start accepts. Automaton has 21201 states and 54809 transitions. Word has length 65 [2021-06-05 21:14:59,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:59,807 INFO L482 AbstractCegarLoop]: Abstraction has 21201 states and 54809 transitions. [2021-06-05 21:14:59,808 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:59,808 INFO L276 IsEmpty]: Start isEmpty. Operand 21201 states and 54809 transitions. [2021-06-05 21:14:59,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 21:14:59,821 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:59,821 INFO L554 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:15:00,022 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 646 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1389 [2021-06-05 21:15:00,022 INFO L430 AbstractCegarLoop]: === Iteration 655 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:15:00,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:15:00,022 INFO L82 PathProgramCache]: Analyzing trace with hash -1428489097, now seen corresponding path program 197 times [2021-06-05 21:15:00,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:15:00,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665300659] [2021-06-05 21:15:00,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:15:00,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:15:00,100 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 146 proven. 80 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:15:00,100 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:15:00,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665300659] [2021-06-05 21:15:00,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665300659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:00,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943083378] [2021-06-05 21:15:00,100 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 647 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 647 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:15:00,135 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-06-05 21:15:00,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:15:00,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:15:00,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:15:00,282 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 147 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:15:00,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943083378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:00,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:15:00,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18] total 21 [2021-06-05 21:15:00,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600195299] [2021-06-05 21:15:00,283 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:15:00,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:15:00,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:15:00,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=303, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:15:00,283 INFO L87 Difference]: Start difference. First operand 21201 states and 54809 transitions. Second operand has 22 states, 22 states have (on average 4.545454545454546) internal successors, (100), 21 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:00,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:15:00,652 INFO L93 Difference]: Finished difference Result 25604 states and 63733 transitions. [2021-06-05 21:15:00,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:15:00,652 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.545454545454546) internal successors, (100), 21 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 21:15:00,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:15:00,683 INFO L225 Difference]: With dead ends: 25604 [2021-06-05 21:15:00,683 INFO L226 Difference]: Without dead ends: 25574 [2021-06-05 21:15:00,683 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 146.2ms TimeCoverageRelationStatistics Valid=194, Invalid=406, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:15:00,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25574 states. [2021-06-05 21:15:00,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25574 to 21847. [2021-06-05 21:15:00,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21847 states, 21846 states have (on average 2.5884830174860385) internal successors, (56548), 21846 states have internal predecessors, (56548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:01,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21847 states to 21847 states and 56548 transitions. [2021-06-05 21:15:01,001 INFO L78 Accepts]: Start accepts. Automaton has 21847 states and 56548 transitions. Word has length 65 [2021-06-05 21:15:01,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:15:01,001 INFO L482 AbstractCegarLoop]: Abstraction has 21847 states and 56548 transitions. [2021-06-05 21:15:01,001 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.545454545454546) internal successors, (100), 21 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:01,001 INFO L276 IsEmpty]: Start isEmpty. Operand 21847 states and 56548 transitions. [2021-06-05 21:15:01,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 21:15:01,016 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:15:01,016 INFO L554 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:15:01,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1390,647 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:15:01,216 INFO L430 AbstractCegarLoop]: === Iteration 656 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:15:01,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:15:01,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1375420183, now seen corresponding path program 400 times [2021-06-05 21:15:01,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:15:01,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794668960] [2021-06-05 21:15:01,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:15:01,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:15:01,293 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 68 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:15:01,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:15:01,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794668960] [2021-06-05 21:15:01,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794668960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:01,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515271963] [2021-06-05 21:15:01,293 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 648 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 648 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:15:01,321 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:15:01,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:15:01,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:15:01,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:15:01,414 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 68 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:15:01,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515271963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:01,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:15:01,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-05 21:15:01,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464728927] [2021-06-05 21:15:01,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:15:01,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:15:01,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:15:01,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:15:01,415 INFO L87 Difference]: Start difference. First operand 21847 states and 56548 transitions. Second operand has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:01,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:15:01,666 INFO L93 Difference]: Finished difference Result 26845 states and 65318 transitions. [2021-06-05 21:15:01,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:15:01,666 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 21:15:01,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:15:01,699 INFO L225 Difference]: With dead ends: 26845 [2021-06-05 21:15:01,699 INFO L226 Difference]: Without dead ends: 26827 [2021-06-05 21:15:01,699 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 85.7ms TimeCoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:15:01,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26827 states. [2021-06-05 21:15:01,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26827 to 21826. [2021-06-05 21:15:01,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21826 states, 21825 states have (on average 2.586758304696449) internal successors, (56456), 21825 states have internal predecessors, (56456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:02,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21826 states to 21826 states and 56456 transitions. [2021-06-05 21:15:02,029 INFO L78 Accepts]: Start accepts. Automaton has 21826 states and 56456 transitions. Word has length 65 [2021-06-05 21:15:02,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:15:02,029 INFO L482 AbstractCegarLoop]: Abstraction has 21826 states and 56456 transitions. [2021-06-05 21:15:02,029 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:02,029 INFO L276 IsEmpty]: Start isEmpty. Operand 21826 states and 56456 transitions. [2021-06-05 21:15:02,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 21:15:02,044 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:15:02,044 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:15:02,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1393,648 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:15:02,245 INFO L430 AbstractCegarLoop]: === Iteration 657 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:15:02,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:15:02,245 INFO L82 PathProgramCache]: Analyzing trace with hash 870727724, now seen corresponding path program 401 times [2021-06-05 21:15:02,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:15:02,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406851459] [2021-06-05 21:15:02,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:15:02,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:15:02,354 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 19 proven. 204 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:15:02,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:15:02,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406851459] [2021-06-05 21:15:02,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406851459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:02,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661714363] [2021-06-05 21:15:02,354 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 649 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 649 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:15:02,492 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-06-05 21:15:02,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:15:02,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 21:15:02,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:15:02,587 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 205 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:15:02,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661714363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:02,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:15:02,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 21:15:02,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636553158] [2021-06-05 21:15:02,588 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:15:02,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:15:02,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:15:02,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:15:02,588 INFO L87 Difference]: Start difference. First operand 21826 states and 56456 transitions. Second operand has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:03,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:15:03,618 INFO L93 Difference]: Finished difference Result 26191 states and 65578 transitions. [2021-06-05 21:15:03,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 21:15:03,619 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 21:15:03,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:15:03,649 INFO L225 Difference]: With dead ends: 26191 [2021-06-05 21:15:03,649 INFO L226 Difference]: Without dead ends: 26137 [2021-06-05 21:15:03,649 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 308.7ms TimeCoverageRelationStatistics Valid=135, Invalid=1055, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 21:15:03,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26137 states. [2021-06-05 21:15:03,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26137 to 22289. [2021-06-05 21:15:03,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22289 states, 22288 states have (on average 2.589465183058148) internal successors, (57714), 22288 states have internal predecessors, (57714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:03,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22289 states to 22289 states and 57714 transitions. [2021-06-05 21:15:03,998 INFO L78 Accepts]: Start accepts. Automaton has 22289 states and 57714 transitions. Word has length 65 [2021-06-05 21:15:03,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:15:03,998 INFO L482 AbstractCegarLoop]: Abstraction has 22289 states and 57714 transitions. [2021-06-05 21:15:03,999 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:03,999 INFO L276 IsEmpty]: Start isEmpty. Operand 22289 states and 57714 transitions. [2021-06-05 21:15:04,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 21:15:04,016 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:15:04,016 INFO L554 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:15:04,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 649 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1396 [2021-06-05 21:15:04,217 INFO L430 AbstractCegarLoop]: === Iteration 658 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:15:04,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:15:04,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1891680463, now seen corresponding path program 402 times [2021-06-05 21:15:04,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:15:04,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300378407] [2021-06-05 21:15:04,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:15:04,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:15:04,306 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 63 proven. 163 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:15:04,306 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:15:04,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300378407] [2021-06-05 21:15:04,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300378407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:04,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403911046] [2021-06-05 21:15:04,306 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 650 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 650 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:15:04,342 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-06-05 21:15:04,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:15:04,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:15:04,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:15:04,437 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 63 proven. 163 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:15:04,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403911046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:04,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:15:04,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-06-05 21:15:04,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548320893] [2021-06-05 21:15:04,437 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:15:04,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:15:04,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:15:04,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:15:04,438 INFO L87 Difference]: Start difference. First operand 22289 states and 57714 transitions. Second operand has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:04,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:15:04,765 INFO L93 Difference]: Finished difference Result 27384 states and 66666 transitions. [2021-06-05 21:15:04,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:15:04,765 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 21:15:04,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:15:04,799 INFO L225 Difference]: With dead ends: 27384 [2021-06-05 21:15:04,799 INFO L226 Difference]: Without dead ends: 27360 [2021-06-05 21:15:04,799 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 98.0ms TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:15:04,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27360 states. [2021-06-05 21:15:05,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27360 to 22289. [2021-06-05 21:15:05,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22289 states, 22288 states have (on average 2.588702440775305) internal successors, (57697), 22288 states have internal predecessors, (57697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:05,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22289 states to 22289 states and 57697 transitions. [2021-06-05 21:15:05,161 INFO L78 Accepts]: Start accepts. Automaton has 22289 states and 57697 transitions. Word has length 65 [2021-06-05 21:15:05,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:15:05,161 INFO L482 AbstractCegarLoop]: Abstraction has 22289 states and 57697 transitions. [2021-06-05 21:15:05,162 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:05,162 INFO L276 IsEmpty]: Start isEmpty. Operand 22289 states and 57697 transitions. [2021-06-05 21:15:05,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 21:15:05,179 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:15:05,179 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:15:05,379 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 650 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1397 [2021-06-05 21:15:05,379 INFO L430 AbstractCegarLoop]: === Iteration 659 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:15:05,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:15:05,379 INFO L82 PathProgramCache]: Analyzing trace with hash 1025564258, now seen corresponding path program 403 times [2021-06-05 21:15:05,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:15:05,380 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401678533] [2021-06-05 21:15:05,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:15:05,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:15:05,504 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 19 proven. 204 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:15:05,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:15:05,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401678533] [2021-06-05 21:15:05,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401678533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:05,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455846844] [2021-06-05 21:15:05,504 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 651 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 651 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:15:05,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:15:05,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 21:15:05,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:15:05,629 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 205 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:15:05,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455846844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:05,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:15:05,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:15:05,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605599359] [2021-06-05 21:15:05,630 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:15:05,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:15:05,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:15:05,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:15:05,630 INFO L87 Difference]: Start difference. First operand 22289 states and 57697 transitions. Second operand has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 14 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:07,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:15:07,074 INFO L93 Difference]: Finished difference Result 31771 states and 78106 transitions. [2021-06-05 21:15:07,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 21:15:07,074 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 14 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 21:15:07,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:15:07,117 INFO L225 Difference]: With dead ends: 31771 [2021-06-05 21:15:07,118 INFO L226 Difference]: Without dead ends: 31603 [2021-06-05 21:15:07,118 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 609.3ms TimeCoverageRelationStatistics Valid=333, Invalid=3089, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 21:15:07,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31603 states. [2021-06-05 21:15:07,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31603 to 23236. [2021-06-05 21:15:07,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23236 states, 23235 states have (on average 2.5904884871960405) internal successors, (60190), 23235 states have internal predecessors, (60190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:07,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23236 states to 23236 states and 60190 transitions. [2021-06-05 21:15:07,523 INFO L78 Accepts]: Start accepts. Automaton has 23236 states and 60190 transitions. Word has length 65 [2021-06-05 21:15:07,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:15:07,523 INFO L482 AbstractCegarLoop]: Abstraction has 23236 states and 60190 transitions. [2021-06-05 21:15:07,523 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 14 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:07,523 INFO L276 IsEmpty]: Start isEmpty. Operand 23236 states and 60190 transitions. [2021-06-05 21:15:07,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 21:15:07,540 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:15:07,540 INFO L554 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:15:07,741 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 651 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1401 [2021-06-05 21:15:07,741 INFO L430 AbstractCegarLoop]: === Iteration 660 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:15:07,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:15:07,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1412166935, now seen corresponding path program 404 times [2021-06-05 21:15:07,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:15:07,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285432311] [2021-06-05 21:15:07,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:15:07,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:15:07,839 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 55 proven. 171 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:15:07,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:15:07,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285432311] [2021-06-05 21:15:07,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285432311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:07,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374998488] [2021-06-05 21:15:07,839 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 652 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 652 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:15:07,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:15:07,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:15:07,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:15:07,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:15:07,965 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 55 proven. 171 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:15:07,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374998488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:07,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:15:07,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-05 21:15:07,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469437184] [2021-06-05 21:15:07,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:15:07,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:15:07,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:15:07,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:15:07,966 INFO L87 Difference]: Start difference. First operand 23236 states and 60190 transitions. Second operand has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 14 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:08,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:15:08,238 INFO L93 Difference]: Finished difference Result 28515 states and 69490 transitions. [2021-06-05 21:15:08,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:15:08,239 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 14 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 21:15:08,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:15:08,276 INFO L225 Difference]: With dead ends: 28515 [2021-06-05 21:15:08,277 INFO L226 Difference]: Without dead ends: 28482 [2021-06-05 21:15:08,277 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 116.2ms TimeCoverageRelationStatistics Valid=118, Invalid=224, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:15:08,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28482 states. [2021-06-05 21:15:08,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28482 to 23236. [2021-06-05 21:15:08,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23236 states, 23235 states have (on average 2.590101140520766) internal successors, (60181), 23235 states have internal predecessors, (60181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:08,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23236 states to 23236 states and 60181 transitions. [2021-06-05 21:15:08,652 INFO L78 Accepts]: Start accepts. Automaton has 23236 states and 60181 transitions. Word has length 65 [2021-06-05 21:15:08,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:15:08,652 INFO L482 AbstractCegarLoop]: Abstraction has 23236 states and 60181 transitions. [2021-06-05 21:15:08,652 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 14 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:08,653 INFO L276 IsEmpty]: Start isEmpty. Operand 23236 states and 60181 transitions. [2021-06-05 21:15:08,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 21:15:08,669 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:15:08,669 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:15:08,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 652 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1402 [2021-06-05 21:15:08,870 INFO L430 AbstractCegarLoop]: === Iteration 661 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:15:08,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:15:08,870 INFO L82 PathProgramCache]: Analyzing trace with hash 965872748, now seen corresponding path program 405 times [2021-06-05 21:15:08,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:15:08,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591004945] [2021-06-05 21:15:08,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:15:08,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:15:09,002 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 19 proven. 204 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:15:09,002 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:15:09,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591004945] [2021-06-05 21:15:09,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591004945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:09,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138570212] [2021-06-05 21:15:09,002 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 653 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 653 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:15:09,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-06-05 21:15:09,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:15:09,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 21:15:09,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:15:09,132 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 205 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:15:09,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138570212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:09,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:15:09,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 21:15:09,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307722934] [2021-06-05 21:15:09,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:15:09,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:15:09,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:15:09,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:15:09,133 INFO L87 Difference]: Start difference. First operand 23236 states and 60181 transitions. Second operand has 16 states, 16 states have (on average 4.0625) internal successors, (65), 15 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:11,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:15:11,396 INFO L93 Difference]: Finished difference Result 43429 states and 104578 transitions. [2021-06-05 21:15:11,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-06-05 21:15:11,397 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.0625) internal successors, (65), 15 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 21:15:11,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:15:11,447 INFO L225 Difference]: With dead ends: 43429 [2021-06-05 21:15:11,447 INFO L226 Difference]: Without dead ends: 42973 [2021-06-05 21:15:11,448 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3483 ImplicationChecksByTransitivity, 1177.1ms TimeCoverageRelationStatistics Valid=819, Invalid=8883, Unknown=0, NotChecked=0, Total=9702 [2021-06-05 21:15:11,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42973 states. [2021-06-05 21:15:11,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42973 to 24902. [2021-06-05 21:15:11,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24902 states, 24901 states have (on average 2.590699168708084) internal successors, (64511), 24901 states have internal predecessors, (64511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:11,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24902 states to 24902 states and 64511 transitions. [2021-06-05 21:15:11,934 INFO L78 Accepts]: Start accepts. Automaton has 24902 states and 64511 transitions. Word has length 65 [2021-06-05 21:15:11,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:15:11,934 INFO L482 AbstractCegarLoop]: Abstraction has 24902 states and 64511 transitions. [2021-06-05 21:15:11,934 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.0625) internal successors, (65), 15 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:11,934 INFO L276 IsEmpty]: Start isEmpty. Operand 24902 states and 64511 transitions. [2021-06-05 21:15:11,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 21:15:11,950 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:15:11,950 INFO L554 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:15:12,150 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1407,653 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:15:12,150 INFO L430 AbstractCegarLoop]: === Iteration 662 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:15:12,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:15:12,150 INFO L82 PathProgramCache]: Analyzing trace with hash -1435521679, now seen corresponding path program 406 times [2021-06-05 21:15:12,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:15:12,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805804319] [2021-06-05 21:15:12,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:15:12,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:15:12,260 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 53 proven. 173 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:15:12,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:15:12,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805804319] [2021-06-05 21:15:12,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805804319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:12,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85362419] [2021-06-05 21:15:12,260 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 654 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 654 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:15:12,288 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:15:12,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:15:12,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:15:12,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:15:12,385 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 53 proven. 173 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:15:12,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85362419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:12,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:15:12,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-06-05 21:15:12,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597706986] [2021-06-05 21:15:12,386 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:15:12,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:15:12,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:15:12,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:15:12,386 INFO L87 Difference]: Start difference. First operand 24902 states and 64511 transitions. Second operand has 16 states, 16 states have (on average 4.0) internal successors, (64), 15 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:12,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:15:12,700 INFO L93 Difference]: Finished difference Result 30490 states and 74400 transitions. [2021-06-05 21:15:12,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:15:12,701 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.0) internal successors, (64), 15 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 21:15:12,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:15:12,734 INFO L225 Difference]: With dead ends: 30490 [2021-06-05 21:15:12,734 INFO L226 Difference]: Without dead ends: 30448 [2021-06-05 21:15:12,734 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 138.8ms TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:15:12,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30448 states. [2021-06-05 21:15:13,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30448 to 24902. [2021-06-05 21:15:13,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24902 states, 24901 states have (on average 2.5903377374402634) internal successors, (64502), 24901 states have internal predecessors, (64502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:13,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24902 states to 24902 states and 64502 transitions. [2021-06-05 21:15:13,135 INFO L78 Accepts]: Start accepts. Automaton has 24902 states and 64502 transitions. Word has length 65 [2021-06-05 21:15:13,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:15:13,135 INFO L482 AbstractCegarLoop]: Abstraction has 24902 states and 64502 transitions. [2021-06-05 21:15:13,135 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.0) internal successors, (64), 15 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:13,135 INFO L276 IsEmpty]: Start isEmpty. Operand 24902 states and 64502 transitions. [2021-06-05 21:15:13,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 21:15:13,151 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:15:13,151 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:15:13,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1408,654 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:15:13,352 INFO L430 AbstractCegarLoop]: === Iteration 663 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:15:13,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:15:13,352 INFO L82 PathProgramCache]: Analyzing trace with hash 812558882, now seen corresponding path program 407 times [2021-06-05 21:15:13,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:15:13,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82343719] [2021-06-05 21:15:13,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:15:13,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:15:13,496 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 19 proven. 204 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:15:13,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:15:13,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82343719] [2021-06-05 21:15:13,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82343719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:13,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367026722] [2021-06-05 21:15:13,496 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 655 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 655 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:15:13,531 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-06-05 21:15:13,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:15:13,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 21:15:13,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:15:13,623 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 205 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:15:13,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367026722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:13,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:15:13,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-06-05 21:15:13,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201140155] [2021-06-05 21:15:13,624 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:15:13,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:15:13,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:15:13,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:15:13,624 INFO L87 Difference]: Start difference. First operand 24902 states and 64502 transitions. Second operand has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 16 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:17,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:15:17,160 INFO L93 Difference]: Finished difference Result 69310 states and 163134 transitions. [2021-06-05 21:15:17,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2021-06-05 21:15:17,161 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 16 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 21:15:17,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:15:17,256 INFO L225 Difference]: With dead ends: 69310 [2021-06-05 21:15:17,257 INFO L226 Difference]: Without dead ends: 67924 [2021-06-05 21:15:17,259 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10744 ImplicationChecksByTransitivity, 2355.1ms TimeCoverageRelationStatistics Valid=1953, Invalid=24453, Unknown=0, NotChecked=0, Total=26406 [2021-06-05 21:15:17,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67924 states. [2021-06-05 21:15:17,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67924 to 27517. [2021-06-05 21:15:17,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27517 states, 27516 states have (on average 2.5895842418956243) internal successors, (71255), 27516 states have internal predecessors, (71255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:17,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27517 states to 27517 states and 71255 transitions. [2021-06-05 21:15:17,959 INFO L78 Accepts]: Start accepts. Automaton has 27517 states and 71255 transitions. Word has length 65 [2021-06-05 21:15:17,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:15:17,959 INFO L482 AbstractCegarLoop]: Abstraction has 27517 states and 71255 transitions. [2021-06-05 21:15:17,960 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 16 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:17,960 INFO L276 IsEmpty]: Start isEmpty. Operand 27517 states and 71255 transitions. [2021-06-05 21:15:17,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 21:15:17,977 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:15:17,977 INFO L554 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:15:18,177 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1414,655 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:15:18,177 INFO L430 AbstractCegarLoop]: === Iteration 664 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:15:18,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:15:18,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1561976535, now seen corresponding path program 408 times [2021-06-05 21:15:18,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:15:18,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098064890] [2021-06-05 21:15:18,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:15:18,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:15:18,294 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 57 proven. 169 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:15:18,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:15:18,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098064890] [2021-06-05 21:15:18,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098064890] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:18,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205415885] [2021-06-05 21:15:18,295 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 656 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 656 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:15:18,328 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-06-05 21:15:18,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:15:18,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:15:18,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:15:18,422 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 57 proven. 169 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:15:18,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205415885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:18,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:15:18,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2021-06-05 21:15:18,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511384634] [2021-06-05 21:15:18,423 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:15:18,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:15:18,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:15:18,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:15:18,423 INFO L87 Difference]: Start difference. First operand 27517 states and 71255 transitions. Second operand has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 16 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:18,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:15:18,756 INFO L93 Difference]: Finished difference Result 33599 states and 82086 transitions. [2021-06-05 21:15:18,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:15:18,756 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 16 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 21:15:18,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:15:18,798 INFO L225 Difference]: With dead ends: 33599 [2021-06-05 21:15:18,798 INFO L226 Difference]: Without dead ends: 33548 [2021-06-05 21:15:18,798 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 157.7ms TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:15:18,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33548 states. [2021-06-05 21:15:19,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33548 to 27517. [2021-06-05 21:15:19,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27517 states, 27516 states have (on average 2.5892571594708533) internal successors, (71246), 27516 states have internal predecessors, (71246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:19,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27517 states to 27517 states and 71246 transitions. [2021-06-05 21:15:19,277 INFO L78 Accepts]: Start accepts. Automaton has 27517 states and 71246 transitions. Word has length 65 [2021-06-05 21:15:19,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:15:19,277 INFO L482 AbstractCegarLoop]: Abstraction has 27517 states and 71246 transitions. [2021-06-05 21:15:19,277 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 16 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:19,277 INFO L276 IsEmpty]: Start isEmpty. Operand 27517 states and 71246 transitions. [2021-06-05 21:15:19,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 21:15:19,424 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:15:19,424 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:15:19,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 656 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1415 [2021-06-05 21:15:19,624 INFO L430 AbstractCegarLoop]: === Iteration 665 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:15:19,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:15:19,625 INFO L82 PathProgramCache]: Analyzing trace with hash -1010587476, now seen corresponding path program 409 times [2021-06-05 21:15:19,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:15:19,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325722633] [2021-06-05 21:15:19,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:15:19,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:15:19,781 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 19 proven. 204 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:15:19,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:15:19,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325722633] [2021-06-05 21:15:19,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325722633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:19,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866556622] [2021-06-05 21:15:19,782 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 657 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 657 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:15:19,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:15:19,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 21:15:19,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:15:19,904 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 205 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:15:19,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866556622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:19,905 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:15:19,905 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-06-05 21:15:19,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167247674] [2021-06-05 21:15:19,905 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:15:19,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:15:19,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:15:19,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:15:19,905 INFO L87 Difference]: Start difference. First operand 27517 states and 71246 transitions. Second operand has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:25,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:15:25,617 INFO L93 Difference]: Finished difference Result 88601 states and 209190 transitions. [2021-06-05 21:15:25,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 259 states. [2021-06-05 21:15:25,618 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 21:15:25,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:15:25,743 INFO L225 Difference]: With dead ends: 88601 [2021-06-05 21:15:25,743 INFO L226 Difference]: Without dead ends: 87281 [2021-06-05 21:15:25,749 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 257 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29314 ImplicationChecksByTransitivity, 4351.4ms TimeCoverageRelationStatistics Valid=4383, Invalid=62439, Unknown=0, NotChecked=0, Total=66822 [2021-06-05 21:15:25,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87281 states. [2021-06-05 21:15:26,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87281 to 29787. [2021-06-05 21:15:26,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29787 states, 29786 states have (on average 2.5864164372524003) internal successors, (77039), 29786 states have internal predecessors, (77039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:26,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29787 states to 29787 states and 77039 transitions. [2021-06-05 21:15:26,742 INFO L78 Accepts]: Start accepts. Automaton has 29787 states and 77039 transitions. Word has length 65 [2021-06-05 21:15:26,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:15:26,742 INFO L482 AbstractCegarLoop]: Abstraction has 29787 states and 77039 transitions. [2021-06-05 21:15:26,742 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:26,742 INFO L276 IsEmpty]: Start isEmpty. Operand 29787 states and 77039 transitions. [2021-06-05 21:15:26,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 21:15:26,760 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:15:26,760 INFO L554 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:15:26,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 657 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1422 [2021-06-05 21:15:26,960 INFO L430 AbstractCegarLoop]: === Iteration 666 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:15:26,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:15:26,961 INFO L82 PathProgramCache]: Analyzing trace with hash -928748623, now seen corresponding path program 410 times [2021-06-05 21:15:26,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:15:26,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540039682] [2021-06-05 21:15:26,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:15:26,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:15:27,112 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 67 proven. 159 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:15:27,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:15:27,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540039682] [2021-06-05 21:15:27,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540039682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:27,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657282864] [2021-06-05 21:15:27,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 658 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 658 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:15:27,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:15:27,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:15:27,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:15:27,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:15:27,246 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 67 proven. 159 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:15:27,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657282864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:27,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:15:27,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-06-05 21:15:27,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571974657] [2021-06-05 21:15:27,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:15:27,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:15:27,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:15:27,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:15:27,247 INFO L87 Difference]: Start difference. First operand 29787 states and 77039 transitions. Second operand has 18 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 17 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:27,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:15:27,682 INFO L93 Difference]: Finished difference Result 36048 states and 88237 transitions. [2021-06-05 21:15:27,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:15:27,683 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 17 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 21:15:27,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:15:27,729 INFO L225 Difference]: With dead ends: 36048 [2021-06-05 21:15:27,729 INFO L226 Difference]: Without dead ends: 35988 [2021-06-05 21:15:27,729 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 202.0ms TimeCoverageRelationStatistics Valid=187, Invalid=413, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:15:27,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35988 states. [2021-06-05 21:15:28,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35988 to 29354. [2021-06-05 21:15:28,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29354 states, 29353 states have (on average 2.583756345177665) internal successors, (75841), 29353 states have internal predecessors, (75841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:28,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29354 states to 29354 states and 75841 transitions. [2021-06-05 21:15:28,230 INFO L78 Accepts]: Start accepts. Automaton has 29354 states and 75841 transitions. Word has length 65 [2021-06-05 21:15:28,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:15:28,230 INFO L482 AbstractCegarLoop]: Abstraction has 29354 states and 75841 transitions. [2021-06-05 21:15:28,230 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 17 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:28,230 INFO L276 IsEmpty]: Start isEmpty. Operand 29354 states and 75841 transitions. [2021-06-05 21:15:28,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 21:15:28,247 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:15:28,247 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:15:28,447 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 658 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1423 [2021-06-05 21:15:28,448 INFO L430 AbstractCegarLoop]: === Iteration 667 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:15:28,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:15:28,448 INFO L82 PathProgramCache]: Analyzing trace with hash -207313438, now seen corresponding path program 411 times [2021-06-05 21:15:28,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:15:28,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107950204] [2021-06-05 21:15:28,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:15:28,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:15:28,635 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 207 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:15:28,635 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:15:28,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107950204] [2021-06-05 21:15:28,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107950204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:28,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697988227] [2021-06-05 21:15:28,635 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 659 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 659 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:15:28,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-06-05 21:15:28,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:15:28,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 21:15:28,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:15:28,764 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 207 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:15:28,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697988227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:28,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:15:28,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 18 [2021-06-05 21:15:28,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974397262] [2021-06-05 21:15:28,765 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:15:28,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:15:28,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:15:28,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:15:28,765 INFO L87 Difference]: Start difference. First operand 29354 states and 75841 transitions. Second operand has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 18 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:29,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:15:29,950 INFO L93 Difference]: Finished difference Result 42805 states and 102748 transitions. [2021-06-05 21:15:29,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 21:15:29,950 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 18 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 21:15:29,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:15:30,000 INFO L225 Difference]: With dead ends: 42805 [2021-06-05 21:15:30,001 INFO L226 Difference]: Without dead ends: 41023 [2021-06-05 21:15:30,001 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 490.0ms TimeCoverageRelationStatistics Valid=230, Invalid=1330, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 21:15:30,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41023 states. [2021-06-05 21:15:30,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41023 to 21413. [2021-06-05 21:15:30,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21413 states, 21412 states have (on average 2.5783205679058474) internal successors, (55207), 21412 states have internal predecessors, (55207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:30,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21413 states to 21413 states and 55207 transitions. [2021-06-05 21:15:30,407 INFO L78 Accepts]: Start accepts. Automaton has 21413 states and 55207 transitions. Word has length 65 [2021-06-05 21:15:30,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:15:30,407 INFO L482 AbstractCegarLoop]: Abstraction has 21413 states and 55207 transitions. [2021-06-05 21:15:30,407 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 18 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:30,407 INFO L276 IsEmpty]: Start isEmpty. Operand 21413 states and 55207 transitions. [2021-06-05 21:15:30,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 21:15:30,422 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:15:30,422 INFO L554 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:15:30,623 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 659 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1431 [2021-06-05 21:15:30,623 INFO L430 AbstractCegarLoop]: === Iteration 668 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:15:30,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:15:30,623 INFO L82 PathProgramCache]: Analyzing trace with hash -1067255365, now seen corresponding path program 198 times [2021-06-05 21:15:30,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:15:30,623 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46476003] [2021-06-05 21:15:30,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:15:30,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:15:30,703 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 170 proven. 56 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:15:30,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:15:30,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46476003] [2021-06-05 21:15:30,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46476003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:30,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548000072] [2021-06-05 21:15:30,703 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 660 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 660 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:15:30,739 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2021-06-05 21:15:30,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:15:30,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:15:30,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:15:30,840 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 171 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:15:30,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548000072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:30,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:15:30,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-06-05 21:15:30,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762872709] [2021-06-05 21:15:30,841 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:15:30,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:15:30,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:15:30,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=104, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:15:30,841 INFO L87 Difference]: Start difference. First operand 21413 states and 55207 transitions. Second operand has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:31,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:15:31,261 INFO L93 Difference]: Finished difference Result 31342 states and 77017 transitions. [2021-06-05 21:15:31,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:15:31,262 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 21:15:31,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:15:31,301 INFO L225 Difference]: With dead ends: 31342 [2021-06-05 21:15:31,301 INFO L226 Difference]: Without dead ends: 31342 [2021-06-05 21:15:31,301 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 130.4ms TimeCoverageRelationStatistics Valid=176, Invalid=244, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:15:31,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31342 states. [2021-06-05 21:15:31,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31342 to 21689. [2021-06-05 21:15:31,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21689 states, 21688 states have (on average 2.58382515676872) internal successors, (56038), 21688 states have internal predecessors, (56038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:31,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21689 states to 21689 states and 56038 transitions. [2021-06-05 21:15:31,664 INFO L78 Accepts]: Start accepts. Automaton has 21689 states and 56038 transitions. Word has length 65 [2021-06-05 21:15:31,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:15:31,664 INFO L482 AbstractCegarLoop]: Abstraction has 21689 states and 56038 transitions. [2021-06-05 21:15:31,664 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:31,664 INFO L276 IsEmpty]: Start isEmpty. Operand 21689 states and 56038 transitions. [2021-06-05 21:15:31,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 21:15:31,679 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:15:31,679 INFO L554 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:15:31,879 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 660 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1432 [2021-06-05 21:15:31,880 INFO L430 AbstractCegarLoop]: === Iteration 669 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:15:31,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:15:31,880 INFO L82 PathProgramCache]: Analyzing trace with hash 1590139475, now seen corresponding path program 199 times [2021-06-05 21:15:31,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:15:31,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603974436] [2021-06-05 21:15:31,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:15:31,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:15:32,074 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 169 proven. 57 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:15:32,074 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:15:32,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603974436] [2021-06-05 21:15:32,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603974436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:32,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612796055] [2021-06-05 21:15:32,074 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 661 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 661 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:15:32,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:15:32,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:15:32,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:15:32,201 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 170 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:15:32,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612796055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:32,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:15:32,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 14 [2021-06-05 21:15:32,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186162481] [2021-06-05 21:15:32,201 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:15:32,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:15:32,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:15:32,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:15:32,201 INFO L87 Difference]: Start difference. First operand 21689 states and 56038 transitions. Second operand has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:32,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:15:32,651 INFO L93 Difference]: Finished difference Result 35356 states and 86322 transitions. [2021-06-05 21:15:32,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 21:15:32,651 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 21:15:32,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:15:32,693 INFO L225 Difference]: With dead ends: 35356 [2021-06-05 21:15:32,693 INFO L226 Difference]: Without dead ends: 35356 [2021-06-05 21:15:32,693 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 195.2ms TimeCoverageRelationStatistics Valid=296, Invalid=460, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:15:32,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35356 states. [2021-06-05 21:15:33,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35356 to 21737. [2021-06-05 21:15:33,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21737 states, 21736 states have (on average 2.584606183290394) internal successors, (56179), 21736 states have internal predecessors, (56179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:33,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21737 states to 21737 states and 56179 transitions. [2021-06-05 21:15:33,066 INFO L78 Accepts]: Start accepts. Automaton has 21737 states and 56179 transitions. Word has length 65 [2021-06-05 21:15:33,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:15:33,066 INFO L482 AbstractCegarLoop]: Abstraction has 21737 states and 56179 transitions. [2021-06-05 21:15:33,066 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:33,066 INFO L276 IsEmpty]: Start isEmpty. Operand 21737 states and 56179 transitions. [2021-06-05 21:15:33,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 21:15:33,080 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:15:33,080 INFO L554 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:15:33,281 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1433,661 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:15:33,281 INFO L430 AbstractCegarLoop]: === Iteration 670 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:15:33,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:15:33,281 INFO L82 PathProgramCache]: Analyzing trace with hash -99855689, now seen corresponding path program 200 times [2021-06-05 21:15:33,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:15:33,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714227838] [2021-06-05 21:15:33,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:15:33,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:15:33,388 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 162 proven. 64 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:15:33,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:15:33,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714227838] [2021-06-05 21:15:33,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714227838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:33,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53535201] [2021-06-05 21:15:33,388 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 662 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 662 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:15:33,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:15:33,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:15:33,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:15:33,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:15:33,530 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 163 proven. 64 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:15:33,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53535201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:33,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:15:33,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 15 [2021-06-05 21:15:33,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895973542] [2021-06-05 21:15:33,531 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:15:33,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:15:33,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:15:33,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:15:33,531 INFO L87 Difference]: Start difference. First operand 21737 states and 56179 transitions. Second operand has 16 states, 16 states have (on average 4.3125) internal successors, (69), 15 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:34,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:15:34,132 INFO L93 Difference]: Finished difference Result 37231 states and 90722 transitions. [2021-06-05 21:15:34,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 21:15:34,132 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.3125) internal successors, (69), 15 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 21:15:34,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:15:34,176 INFO L225 Difference]: With dead ends: 37231 [2021-06-05 21:15:34,176 INFO L226 Difference]: Without dead ends: 37231 [2021-06-05 21:15:34,177 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 256.6ms TimeCoverageRelationStatistics Valid=403, Invalid=653, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 21:15:34,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37231 states. [2021-06-05 21:15:34,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37231 to 21806. [2021-06-05 21:15:34,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21806 states, 21805 states have (on average 2.5857830772758543) internal successors, (56383), 21805 states have internal predecessors, (56383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:34,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21806 states to 21806 states and 56383 transitions. [2021-06-05 21:15:34,600 INFO L78 Accepts]: Start accepts. Automaton has 21806 states and 56383 transitions. Word has length 65 [2021-06-05 21:15:34,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:15:34,600 INFO L482 AbstractCegarLoop]: Abstraction has 21806 states and 56383 transitions. [2021-06-05 21:15:34,600 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.3125) internal successors, (69), 15 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:34,600 INFO L276 IsEmpty]: Start isEmpty. Operand 21806 states and 56383 transitions. [2021-06-05 21:15:34,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 21:15:34,616 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:15:34,616 INFO L554 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:15:34,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 662 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1434 [2021-06-05 21:15:34,816 INFO L430 AbstractCegarLoop]: === Iteration 671 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:15:34,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:15:34,816 INFO L82 PathProgramCache]: Analyzing trace with hash -1139142701, now seen corresponding path program 201 times [2021-06-05 21:15:34,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:15:34,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730723514] [2021-06-05 21:15:34,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:15:34,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:15:34,932 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 155 proven. 71 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:15:34,932 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:15:34,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730723514] [2021-06-05 21:15:34,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730723514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:34,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112424358] [2021-06-05 21:15:34,932 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 663 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 663 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:15:34,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-06-05 21:15:34,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:15:34,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:15:34,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:15:35,075 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 156 proven. 71 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:15:35,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112424358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:35,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:15:35,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 16 [2021-06-05 21:15:35,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841888958] [2021-06-05 21:15:35,076 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:15:35,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:15:35,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:15:35,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:15:35,076 INFO L87 Difference]: Start difference. First operand 21806 states and 56383 transitions. Second operand has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 16 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:35,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:15:35,722 INFO L93 Difference]: Finished difference Result 37033 states and 90316 transitions. [2021-06-05 21:15:35,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 21:15:35,722 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 16 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 21:15:35,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:15:35,770 INFO L225 Difference]: With dead ends: 37033 [2021-06-05 21:15:35,770 INFO L226 Difference]: Without dead ends: 37033 [2021-06-05 21:15:35,770 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 297.2ms TimeCoverageRelationStatistics Valid=478, Invalid=782, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 21:15:35,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37033 states. [2021-06-05 21:15:36,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37033 to 21884. [2021-06-05 21:15:36,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21884 states, 21883 states have (on average 2.5871224237992965) internal successors, (56614), 21883 states have internal predecessors, (56614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:36,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21884 states to 21884 states and 56614 transitions. [2021-06-05 21:15:36,348 INFO L78 Accepts]: Start accepts. Automaton has 21884 states and 56614 transitions. Word has length 65 [2021-06-05 21:15:36,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:15:36,348 INFO L482 AbstractCegarLoop]: Abstraction has 21884 states and 56614 transitions. [2021-06-05 21:15:36,348 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 16 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:36,348 INFO L276 IsEmpty]: Start isEmpty. Operand 21884 states and 56614 transitions. [2021-06-05 21:15:36,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 21:15:36,364 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:15:36,364 INFO L554 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:15:36,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1435,663 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:15:36,564 INFO L430 AbstractCegarLoop]: === Iteration 672 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:15:36,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:15:36,565 INFO L82 PathProgramCache]: Analyzing trace with hash -119280329, now seen corresponding path program 202 times [2021-06-05 21:15:36,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:15:36,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503261087] [2021-06-05 21:15:36,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:15:36,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:15:36,693 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 148 proven. 78 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:15:36,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:15:36,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503261087] [2021-06-05 21:15:36,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503261087] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:36,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723622190] [2021-06-05 21:15:36,694 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 664 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 664 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:15:36,722 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:15:36,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:15:36,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:15:36,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:15:36,828 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 149 proven. 78 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:15:36,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723622190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:36,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:15:36,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 17 [2021-06-05 21:15:36,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120187] [2021-06-05 21:15:36,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:15:36,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:15:36,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:15:36,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:15:36,829 INFO L87 Difference]: Start difference. First operand 21884 states and 56614 transitions. Second operand has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 17 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:37,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:15:37,513 INFO L93 Difference]: Finished difference Result 34831 states and 85232 transitions. [2021-06-05 21:15:37,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 21:15:37,513 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 17 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 21:15:37,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:15:37,556 INFO L225 Difference]: With dead ends: 34831 [2021-06-05 21:15:37,556 INFO L226 Difference]: Without dead ends: 34831 [2021-06-05 21:15:37,556 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 315.1ms TimeCoverageRelationStatistics Valid=503, Invalid=829, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 21:15:37,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34831 states. [2021-06-05 21:15:37,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34831 to 21919. [2021-06-05 21:15:37,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21919 states, 21918 states have (on average 2.5879186057122) internal successors, (56722), 21918 states have internal predecessors, (56722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:37,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21919 states to 21919 states and 56722 transitions. [2021-06-05 21:15:37,946 INFO L78 Accepts]: Start accepts. Automaton has 21919 states and 56722 transitions. Word has length 65 [2021-06-05 21:15:37,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:15:37,947 INFO L482 AbstractCegarLoop]: Abstraction has 21919 states and 56722 transitions. [2021-06-05 21:15:37,947 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 17 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:37,947 INFO L276 IsEmpty]: Start isEmpty. Operand 21919 states and 56722 transitions. [2021-06-05 21:15:37,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 21:15:37,962 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:15:37,962 INFO L554 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:15:38,162 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 664 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1436 [2021-06-05 21:15:38,162 INFO L430 AbstractCegarLoop]: === Iteration 673 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:15:38,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:15:38,163 INFO L82 PathProgramCache]: Analyzing trace with hash 1992019, now seen corresponding path program 203 times [2021-06-05 21:15:38,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:15:38,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602714051] [2021-06-05 21:15:38,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:15:38,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:15:38,311 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 141 proven. 85 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:15:38,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:15:38,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602714051] [2021-06-05 21:15:38,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602714051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:38,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167824446] [2021-06-05 21:15:38,311 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 665 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 665 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:15:38,348 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-06-05 21:15:38,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:15:38,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:15:38,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:15:38,672 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 142 proven. 85 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:15:38,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167824446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:38,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:15:38,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 20] total 36 [2021-06-05 21:15:38,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139624333] [2021-06-05 21:15:38,673 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 21:15:38,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:15:38,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 21:15:38,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=1012, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 21:15:38,673 INFO L87 Difference]: Start difference. First operand 21919 states and 56722 transitions. Second operand has 37 states, 37 states have (on average 3.2162162162162162) internal successors, (119), 36 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:39,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:15:39,772 INFO L93 Difference]: Finished difference Result 31459 states and 77242 transitions. [2021-06-05 21:15:39,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 21:15:39,773 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.2162162162162162) internal successors, (119), 36 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 21:15:39,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:15:39,813 INFO L225 Difference]: With dead ends: 31459 [2021-06-05 21:15:39,813 INFO L226 Difference]: Without dead ends: 31459 [2021-06-05 21:15:39,813 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 894 ImplicationChecksByTransitivity, 658.8ms TimeCoverageRelationStatistics Valid=1021, Invalid=2285, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 21:15:39,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31459 states. [2021-06-05 21:15:40,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31459 to 21939. [2021-06-05 21:15:40,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21939 states, 21938 states have (on average 2.5886133649375513) internal successors, (56789), 21938 states have internal predecessors, (56789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:40,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21939 states to 21939 states and 56789 transitions. [2021-06-05 21:15:40,189 INFO L78 Accepts]: Start accepts. Automaton has 21939 states and 56789 transitions. Word has length 65 [2021-06-05 21:15:40,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:15:40,189 INFO L482 AbstractCegarLoop]: Abstraction has 21939 states and 56789 transitions. [2021-06-05 21:15:40,189 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 3.2162162162162162) internal successors, (119), 36 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:40,189 INFO L276 IsEmpty]: Start isEmpty. Operand 21939 states and 56789 transitions. [2021-06-05 21:15:40,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 21:15:40,203 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:15:40,203 INFO L554 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:15:40,403 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1437,665 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:15:40,404 INFO L430 AbstractCegarLoop]: === Iteration 674 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:15:40,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:15:40,404 INFO L82 PathProgramCache]: Analyzing trace with hash 759015351, now seen corresponding path program 204 times [2021-06-05 21:15:40,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:15:40,404 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198824365] [2021-06-05 21:15:40,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:15:40,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:15:40,559 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 134 proven. 93 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:15:40,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:15:40,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198824365] [2021-06-05 21:15:40,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198824365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:40,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627972560] [2021-06-05 21:15:40,559 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 666 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 666 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:15:40,595 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2021-06-05 21:15:40,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:15:40,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:15:40,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:15:40,701 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 135 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:15:40,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627972560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:40,701 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:15:40,701 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 19 [2021-06-05 21:15:40,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275067263] [2021-06-05 21:15:40,701 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 21:15:40,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:15:40,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 21:15:40,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=269, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:15:40,702 INFO L87 Difference]: Start difference. First operand 21939 states and 56789 transitions. Second operand has 20 states, 20 states have (on average 3.45) internal successors, (69), 19 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:41,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:15:41,258 INFO L93 Difference]: Finished difference Result 26303 states and 65783 transitions. [2021-06-05 21:15:41,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:15:41,259 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.45) internal successors, (69), 19 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 21:15:41,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:15:41,290 INFO L225 Difference]: With dead ends: 26303 [2021-06-05 21:15:41,290 INFO L226 Difference]: Without dead ends: 26303 [2021-06-05 21:15:41,290 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 291.3ms TimeCoverageRelationStatistics Valid=371, Invalid=685, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 21:15:41,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26303 states. [2021-06-05 21:15:41,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26303 to 21121. [2021-06-05 21:15:41,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21121 states, 21120 states have (on average 2.5846117424242423) internal successors, (54587), 21120 states have internal predecessors, (54587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:41,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21121 states to 21121 states and 54587 transitions. [2021-06-05 21:15:41,659 INFO L78 Accepts]: Start accepts. Automaton has 21121 states and 54587 transitions. Word has length 65 [2021-06-05 21:15:41,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:15:41,660 INFO L482 AbstractCegarLoop]: Abstraction has 21121 states and 54587 transitions. [2021-06-05 21:15:41,660 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.45) internal successors, (69), 19 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:41,660 INFO L276 IsEmpty]: Start isEmpty. Operand 21121 states and 54587 transitions. [2021-06-05 21:15:41,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 21:15:41,673 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:15:41,673 INFO L554 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:15:41,874 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 666 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1438 [2021-06-05 21:15:41,874 INFO L430 AbstractCegarLoop]: === Iteration 675 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:15:41,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:15:41,874 INFO L82 PathProgramCache]: Analyzing trace with hash 2028042391, now seen corresponding path program 412 times [2021-06-05 21:15:41,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:15:41,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511523033] [2021-06-05 21:15:41,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:15:41,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:15:42,016 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 84 proven. 143 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:15:42,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:15:42,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511523033] [2021-06-05 21:15:42,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511523033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:42,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143566937] [2021-06-05 21:15:42,017 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 667 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 667 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:15:42,044 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:15:42,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:15:42,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:15:42,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:15:42,140 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 84 proven. 143 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:15:42,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143566937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:42,141 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:15:42,141 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-06-05 21:15:42,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321467156] [2021-06-05 21:15:42,141 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:15:42,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:15:42,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:15:42,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:15:42,141 INFO L87 Difference]: Start difference. First operand 21121 states and 54587 transitions. Second operand has 19 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:42,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:15:42,557 INFO L93 Difference]: Finished difference Result 25725 states and 62650 transitions. [2021-06-05 21:15:42,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:15:42,557 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 21:15:42,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:15:42,586 INFO L225 Difference]: With dead ends: 25725 [2021-06-05 21:15:42,586 INFO L226 Difference]: Without dead ends: 25662 [2021-06-05 21:15:42,586 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 206.0ms TimeCoverageRelationStatistics Valid=214, Invalid=488, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:15:42,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25662 states. [2021-06-05 21:15:42,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25662 to 21121. [2021-06-05 21:15:42,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21121 states, 21120 states have (on average 2.584185606060606) internal successors, (54578), 21120 states have internal predecessors, (54578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:42,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21121 states to 21121 states and 54578 transitions. [2021-06-05 21:15:42,895 INFO L78 Accepts]: Start accepts. Automaton has 21121 states and 54578 transitions. Word has length 65 [2021-06-05 21:15:42,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:15:42,896 INFO L482 AbstractCegarLoop]: Abstraction has 21121 states and 54578 transitions. [2021-06-05 21:15:42,896 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:42,896 INFO L276 IsEmpty]: Start isEmpty. Operand 21121 states and 54578 transitions. [2021-06-05 21:15:42,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 21:15:42,914 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:15:42,914 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:15:43,122 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1439,667 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:15:43,123 INFO L430 AbstractCegarLoop]: === Iteration 676 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:15:43,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:15:43,123 INFO L82 PathProgramCache]: Analyzing trace with hash 407999270, now seen corresponding path program 205 times [2021-06-05 21:15:43,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:15:43,123 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916460130] [2021-06-05 21:15:43,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:15:43,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:15:43,232 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 10 proven. 213 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:15:43,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:15:43,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916460130] [2021-06-05 21:15:43,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916460130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:43,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193849608] [2021-06-05 21:15:43,232 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 668 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 668 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:15:43,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:15:43,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 21:15:43,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:15:43,359 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 9 proven. 214 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:15:43,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193849608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:43,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:15:43,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:15:43,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062653844] [2021-06-05 21:15:43,359 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:15:43,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:15:43,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:15:43,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:15:43,359 INFO L87 Difference]: Start difference. First operand 21121 states and 54578 transitions. Second operand has 13 states, 13 states have (on average 5.0) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:44,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:15:44,090 INFO L93 Difference]: Finished difference Result 23217 states and 58673 transitions. [2021-06-05 21:15:44,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:15:44,090 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 21:15:44,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:15:44,117 INFO L225 Difference]: With dead ends: 23217 [2021-06-05 21:15:44,117 INFO L226 Difference]: Without dead ends: 23202 [2021-06-05 21:15:44,118 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 174.6ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:15:44,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23202 states. [2021-06-05 21:15:44,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23202 to 21457. [2021-06-05 21:15:44,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21457 states, 21456 states have (on average 2.580723340790455) internal successors, (55372), 21456 states have internal predecessors, (55372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:44,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21457 states to 21457 states and 55372 transitions. [2021-06-05 21:15:44,423 INFO L78 Accepts]: Start accepts. Automaton has 21457 states and 55372 transitions. Word has length 65 [2021-06-05 21:15:44,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:15:44,423 INFO L482 AbstractCegarLoop]: Abstraction has 21457 states and 55372 transitions. [2021-06-05 21:15:44,423 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:44,424 INFO L276 IsEmpty]: Start isEmpty. Operand 21457 states and 55372 transitions. [2021-06-05 21:15:44,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 21:15:44,438 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:15:44,438 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:15:44,639 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1448,668 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:15:44,639 INFO L430 AbstractCegarLoop]: === Iteration 677 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:15:44,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:15:44,639 INFO L82 PathProgramCache]: Analyzing trace with hash 1908332262, now seen corresponding path program 413 times [2021-06-05 21:15:44,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:15:44,639 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529169] [2021-06-05 21:15:44,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:15:44,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:15:44,767 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 22 proven. 201 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:15:44,767 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:15:44,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529169] [2021-06-05 21:15:44,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:44,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710648522] [2021-06-05 21:15:44,767 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 669 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 669 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:15:44,811 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-06-05 21:15:44,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:15:44,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 21:15:44,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:15:44,938 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 17 proven. 206 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:15:44,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710648522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:44,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:15:44,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 21:15:44,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118262211] [2021-06-05 21:15:44,939 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:15:44,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:15:44,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:15:44,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:15:44,940 INFO L87 Difference]: Start difference. First operand 21457 states and 55372 transitions. Second operand has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 12 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:45,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:15:45,896 INFO L93 Difference]: Finished difference Result 22759 states and 57640 transitions. [2021-06-05 21:15:45,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:15:45,897 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 12 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 21:15:45,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:15:45,920 INFO L225 Difference]: With dead ends: 22759 [2021-06-05 21:15:45,920 INFO L226 Difference]: Without dead ends: 22613 [2021-06-05 21:15:45,921 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 198.7ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:15:45,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22613 states. [2021-06-05 21:15:46,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22613 to 21545. [2021-06-05 21:15:46,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21545 states, 21544 states have (on average 2.5720850352766433) internal successors, (55413), 21544 states have internal predecessors, (55413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:46,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21545 states to 21545 states and 55413 transitions. [2021-06-05 21:15:46,260 INFO L78 Accepts]: Start accepts. Automaton has 21545 states and 55413 transitions. Word has length 65 [2021-06-05 21:15:46,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:15:46,261 INFO L482 AbstractCegarLoop]: Abstraction has 21545 states and 55413 transitions. [2021-06-05 21:15:46,261 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 12 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:46,261 INFO L276 IsEmpty]: Start isEmpty. Operand 21545 states and 55413 transitions. [2021-06-05 21:15:46,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 21:15:46,275 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:15:46,275 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:15:46,475 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 669 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1449 [2021-06-05 21:15:46,476 INFO L430 AbstractCegarLoop]: === Iteration 678 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:15:46,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:15:46,476 INFO L82 PathProgramCache]: Analyzing trace with hash 1294796082, now seen corresponding path program 414 times [2021-06-05 21:15:46,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:15:46,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939485288] [2021-06-05 21:15:46,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:15:46,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:15:46,581 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 19 proven. 202 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:15:46,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:15:46,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939485288] [2021-06-05 21:15:46,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939485288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:46,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269112772] [2021-06-05 21:15:46,581 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 670 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 670 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:15:46,614 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-06-05 21:15:46,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:15:46,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 21:15:46,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:15:46,709 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 203 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:15:46,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269112772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:46,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:15:46,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:15:46,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839314027] [2021-06-05 21:15:46,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:15:46,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:15:46,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:15:46,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:15:46,709 INFO L87 Difference]: Start difference. First operand 21545 states and 55413 transitions. Second operand has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:47,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:15:47,414 INFO L93 Difference]: Finished difference Result 23561 states and 59381 transitions. [2021-06-05 21:15:47,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:15:47,415 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 21:15:47,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:15:47,440 INFO L225 Difference]: With dead ends: 23561 [2021-06-05 21:15:47,440 INFO L226 Difference]: Without dead ends: 23549 [2021-06-05 21:15:47,440 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 171.9ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:15:47,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23549 states. [2021-06-05 21:15:47,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23549 to 21713. [2021-06-05 21:15:47,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21713 states, 21712 states have (on average 2.5719878408253503) internal successors, (55843), 21712 states have internal predecessors, (55843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:47,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21713 states to 21713 states and 55843 transitions. [2021-06-05 21:15:47,748 INFO L78 Accepts]: Start accepts. Automaton has 21713 states and 55843 transitions. Word has length 65 [2021-06-05 21:15:47,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:15:47,748 INFO L482 AbstractCegarLoop]: Abstraction has 21713 states and 55843 transitions. [2021-06-05 21:15:47,749 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:47,749 INFO L276 IsEmpty]: Start isEmpty. Operand 21713 states and 55843 transitions. [2021-06-05 21:15:47,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 21:15:47,763 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:15:47,763 INFO L554 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:15:47,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1450,670 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:15:47,985 INFO L430 AbstractCegarLoop]: === Iteration 679 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:15:47,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:15:47,985 INFO L82 PathProgramCache]: Analyzing trace with hash -353561421, now seen corresponding path program 415 times [2021-06-05 21:15:47,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:15:47,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908899554] [2021-06-05 21:15:47,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:15:47,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:15:48,066 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 79 proven. 146 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:15:48,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:15:48,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908899554] [2021-06-05 21:15:48,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908899554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:48,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252819541] [2021-06-05 21:15:48,066 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 671 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 671 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:15:48,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:15:48,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:15:48,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:15:48,187 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 79 proven. 146 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:15:48,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252819541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:48,188 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:15:48,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-05 21:15:48,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904792414] [2021-06-05 21:15:48,188 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:15:48,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:15:48,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:15:48,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:15:48,188 INFO L87 Difference]: Start difference. First operand 21713 states and 55843 transitions. Second operand has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:48,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:15:48,433 INFO L93 Difference]: Finished difference Result 26875 states and 64939 transitions. [2021-06-05 21:15:48,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:15:48,434 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 21:15:48,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:15:48,467 INFO L225 Difference]: With dead ends: 26875 [2021-06-05 21:15:48,467 INFO L226 Difference]: Without dead ends: 26857 [2021-06-05 21:15:48,467 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 89.2ms TimeCoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:15:48,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26857 states. [2021-06-05 21:15:48,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26857 to 21701. [2021-06-05 21:15:48,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21701 states, 21700 states have (on average 2.5707834101382487) internal successors, (55786), 21700 states have internal predecessors, (55786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:48,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21701 states to 21701 states and 55786 transitions. [2021-06-05 21:15:48,789 INFO L78 Accepts]: Start accepts. Automaton has 21701 states and 55786 transitions. Word has length 65 [2021-06-05 21:15:48,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:15:48,789 INFO L482 AbstractCegarLoop]: Abstraction has 21701 states and 55786 transitions. [2021-06-05 21:15:48,789 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:48,789 INFO L276 IsEmpty]: Start isEmpty. Operand 21701 states and 55786 transitions. [2021-06-05 21:15:48,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 21:15:48,803 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:15:48,803 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:15:49,003 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1451,671 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:15:49,004 INFO L430 AbstractCegarLoop]: === Iteration 680 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:15:49,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:15:49,004 INFO L82 PathProgramCache]: Analyzing trace with hash -858253880, now seen corresponding path program 416 times [2021-06-05 21:15:49,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:15:49,004 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642790418] [2021-06-05 21:15:49,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:15:49,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:15:49,112 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 19 proven. 204 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:15:49,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:15:49,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642790418] [2021-06-05 21:15:49,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642790418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:49,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019254980] [2021-06-05 21:15:49,112 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 672 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 672 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:15:49,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:15:49,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:15:49,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 21:15:49,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:15:49,237 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 205 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:15:49,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019254980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:49,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:15:49,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 21:15:49,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326313818] [2021-06-05 21:15:49,237 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:15:49,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:15:49,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:15:49,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:15:49,238 INFO L87 Difference]: Start difference. First operand 21701 states and 55786 transitions. Second operand has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:50,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:15:50,245 INFO L93 Difference]: Finished difference Result 26110 states and 65034 transitions. [2021-06-05 21:15:50,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 21:15:50,246 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 21:15:50,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:15:50,273 INFO L225 Difference]: With dead ends: 26110 [2021-06-05 21:15:50,273 INFO L226 Difference]: Without dead ends: 26056 [2021-06-05 21:15:50,274 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 336.0ms TimeCoverageRelationStatistics Valid=147, Invalid=1185, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 21:15:50,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26056 states. [2021-06-05 21:15:50,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26056 to 22216. [2021-06-05 21:15:50,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22216 states, 22215 states have (on average 2.574476704929102) internal successors, (57192), 22215 states have internal predecessors, (57192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:50,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22216 states to 22216 states and 57192 transitions. [2021-06-05 21:15:50,607 INFO L78 Accepts]: Start accepts. Automaton has 22216 states and 57192 transitions. Word has length 65 [2021-06-05 21:15:50,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:15:50,607 INFO L482 AbstractCegarLoop]: Abstraction has 22216 states and 57192 transitions. [2021-06-05 21:15:50,607 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:50,607 INFO L276 IsEmpty]: Start isEmpty. Operand 22216 states and 57192 transitions. [2021-06-05 21:15:50,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 21:15:50,623 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:15:50,623 INFO L554 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:15:50,823 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 672 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1454 [2021-06-05 21:15:50,823 INFO L430 AbstractCegarLoop]: === Iteration 681 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:15:50,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:15:50,823 INFO L82 PathProgramCache]: Analyzing trace with hash 674305229, now seen corresponding path program 417 times [2021-06-05 21:15:50,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:15:50,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850958475] [2021-06-05 21:15:50,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:15:50,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:15:50,970 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2021-06-05 21:15:51,016 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 73 proven. 153 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:15:51,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:15:51,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850958475] [2021-06-05 21:15:51,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850958475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:51,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27409103] [2021-06-05 21:15:51,016 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 673 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 673 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:15:51,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-06-05 21:15:51,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:15:51,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:15:51,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:15:51,159 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 73 proven. 153 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:15:51,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27409103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:51,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:15:51,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-06-05 21:15:51,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736130597] [2021-06-05 21:15:51,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:15:51,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:15:51,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:15:51,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:15:51,160 INFO L87 Difference]: Start difference. First operand 22216 states and 57192 transitions. Second operand has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:51,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:15:51,422 INFO L93 Difference]: Finished difference Result 27492 states and 66503 transitions. [2021-06-05 21:15:51,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:15:51,422 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 21:15:51,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:15:51,455 INFO L225 Difference]: With dead ends: 27492 [2021-06-05 21:15:51,455 INFO L226 Difference]: Without dead ends: 27468 [2021-06-05 21:15:51,455 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 201.0ms TimeCoverageRelationStatistics Valid=102, Invalid=170, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:15:51,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27468 states. [2021-06-05 21:15:51,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27468 to 22216. [2021-06-05 21:15:51,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22216 states, 22215 states have (on average 2.573666441593518) internal successors, (57174), 22215 states have internal predecessors, (57174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:51,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22216 states to 22216 states and 57174 transitions. [2021-06-05 21:15:51,803 INFO L78 Accepts]: Start accepts. Automaton has 22216 states and 57174 transitions. Word has length 65 [2021-06-05 21:15:51,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:15:51,803 INFO L482 AbstractCegarLoop]: Abstraction has 22216 states and 57174 transitions. [2021-06-05 21:15:51,804 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:51,804 INFO L276 IsEmpty]: Start isEmpty. Operand 22216 states and 57174 transitions. [2021-06-05 21:15:51,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 21:15:51,818 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:15:51,818 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:15:52,019 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1455,673 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:15:52,019 INFO L430 AbstractCegarLoop]: === Iteration 682 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:15:52,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:15:52,019 INFO L82 PathProgramCache]: Analyzing trace with hash -703417346, now seen corresponding path program 418 times [2021-06-05 21:15:52,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:15:52,019 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538532559] [2021-06-05 21:15:52,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:15:52,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:15:52,145 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 19 proven. 204 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:15:52,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:15:52,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538532559] [2021-06-05 21:15:52,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538532559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:52,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196681223] [2021-06-05 21:15:52,145 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 674 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 674 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:15:52,174 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:15:52,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:15:52,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 21:15:52,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:15:52,277 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 205 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:15:52,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196681223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:52,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:15:52,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:15:52,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075663360] [2021-06-05 21:15:52,277 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:15:52,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:15:52,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:15:52,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:15:52,278 INFO L87 Difference]: Start difference. First operand 22216 states and 57174 transitions. Second operand has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 14 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:53,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:15:53,832 INFO L93 Difference]: Finished difference Result 31885 states and 78097 transitions. [2021-06-05 21:15:53,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 21:15:53,832 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 14 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 21:15:53,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:15:53,871 INFO L225 Difference]: With dead ends: 31885 [2021-06-05 21:15:53,871 INFO L226 Difference]: Without dead ends: 31717 [2021-06-05 21:15:53,872 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1274 ImplicationChecksByTransitivity, 659.9ms TimeCoverageRelationStatistics Valid=381, Invalid=3779, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 21:15:53,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31717 states. [2021-06-05 21:15:54,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31717 to 23319. [2021-06-05 21:15:54,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23319 states, 23318 states have (on average 2.576636075135089) internal successors, (60082), 23318 states have internal predecessors, (60082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:54,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23319 states to 23319 states and 60082 transitions. [2021-06-05 21:15:54,271 INFO L78 Accepts]: Start accepts. Automaton has 23319 states and 60082 transitions. Word has length 65 [2021-06-05 21:15:54,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:15:54,272 INFO L482 AbstractCegarLoop]: Abstraction has 23319 states and 60082 transitions. [2021-06-05 21:15:54,272 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 14 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:54,272 INFO L276 IsEmpty]: Start isEmpty. Operand 23319 states and 60082 transitions. [2021-06-05 21:15:54,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 21:15:54,288 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:15:54,288 INFO L554 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:15:54,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 674 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1459 [2021-06-05 21:15:54,488 INFO L430 AbstractCegarLoop]: === Iteration 683 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:15:54,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:15:54,489 INFO L82 PathProgramCache]: Analyzing trace with hash -316814669, now seen corresponding path program 419 times [2021-06-05 21:15:54,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:15:54,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564352441] [2021-06-05 21:15:54,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:15:54,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:15:54,610 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 62 proven. 164 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:15:54,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:15:54,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564352441] [2021-06-05 21:15:54,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564352441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:54,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218507609] [2021-06-05 21:15:54,611 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 675 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 675 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:15:54,654 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-06-05 21:15:54,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:15:54,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:15:54,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:15:54,793 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 63 proven. 164 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:15:54,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218507609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:54,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:15:54,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 18 [2021-06-05 21:15:54,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984869918] [2021-06-05 21:15:54,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:15:54,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:15:54,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:15:54,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:15:54,794 INFO L87 Difference]: Start difference. First operand 23319 states and 60082 transitions. Second operand has 19 states, 19 states have (on average 4.2631578947368425) internal successors, (81), 18 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:55,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:15:55,145 INFO L93 Difference]: Finished difference Result 29012 states and 70223 transitions. [2021-06-05 21:15:55,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:15:55,146 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.2631578947368425) internal successors, (81), 18 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 21:15:55,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:15:55,181 INFO L225 Difference]: With dead ends: 29012 [2021-06-05 21:15:55,181 INFO L226 Difference]: Without dead ends: 28979 [2021-06-05 21:15:55,181 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 176.7ms TimeCoverageRelationStatistics Valid=156, Invalid=350, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:15:55,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28979 states. [2021-06-05 21:15:55,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28979 to 23319. [2021-06-05 21:15:55,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23319 states, 23318 states have (on average 2.5762501072133115) internal successors, (60073), 23318 states have internal predecessors, (60073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:55,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23319 states to 23319 states and 60073 transitions. [2021-06-05 21:15:55,651 INFO L78 Accepts]: Start accepts. Automaton has 23319 states and 60073 transitions. Word has length 65 [2021-06-05 21:15:55,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:15:55,651 INFO L482 AbstractCegarLoop]: Abstraction has 23319 states and 60073 transitions. [2021-06-05 21:15:55,651 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.2631578947368425) internal successors, (81), 18 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:55,651 INFO L276 IsEmpty]: Start isEmpty. Operand 23319 states and 60073 transitions. [2021-06-05 21:15:55,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 21:15:55,667 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:15:55,668 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:15:55,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1460,675 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:15:55,868 INFO L430 AbstractCegarLoop]: === Iteration 684 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:15:55,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:15:55,868 INFO L82 PathProgramCache]: Analyzing trace with hash -763108856, now seen corresponding path program 420 times [2021-06-05 21:15:55,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:15:55,868 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775472096] [2021-06-05 21:15:55,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:15:55,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:15:55,999 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 19 proven. 204 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:15:55,999 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:15:56,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775472096] [2021-06-05 21:15:56,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775472096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:56,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425171020] [2021-06-05 21:15:56,000 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 676 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 676 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:15:56,034 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-06-05 21:15:56,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:15:56,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 21:15:56,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:15:56,447 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 21:15:56,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 16 [2021-06-05 21:15:56,449 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:15:56,460 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:15:56,460 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-06-05 21:15:56,461 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:15:56,461 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:32, output treesize:19 [2021-06-05 21:15:56,502 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 89 proven. 134 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:15:56,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425171020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:56,502 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:15:56,502 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 31 [2021-06-05 21:15:56,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946640263] [2021-06-05 21:15:56,503 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 21:15:56,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:15:56,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 21:15:56,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=840, Unknown=0, NotChecked=0, Total=992 [2021-06-05 21:15:56,503 INFO L87 Difference]: Start difference. First operand 23319 states and 60073 transitions. Second operand has 32 states, 32 states have (on average 3.78125) internal successors, (121), 31 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:03,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:16:03,667 INFO L93 Difference]: Finished difference Result 59239 states and 136732 transitions. [2021-06-05 21:16:03,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 248 states. [2021-06-05 21:16:03,668 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.78125) internal successors, (121), 31 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 21:16:03,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:16:03,740 INFO L225 Difference]: With dead ends: 59239 [2021-06-05 21:16:03,740 INFO L226 Difference]: Without dead ends: 58649 [2021-06-05 21:16:03,742 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 250 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25814 ImplicationChecksByTransitivity, 4875.6ms TimeCoverageRelationStatistics Valid=3924, Invalid=59328, Unknown=0, NotChecked=0, Total=63252 [2021-06-05 21:16:03,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58649 states. [2021-06-05 21:16:04,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58649 to 25834. [2021-06-05 21:16:04,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25834 states, 25833 states have (on average 2.587659195602524) internal successors, (66847), 25833 states have internal predecessors, (66847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:04,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25834 states to 25834 states and 66847 transitions. [2021-06-05 21:16:04,308 INFO L78 Accepts]: Start accepts. Automaton has 25834 states and 66847 transitions. Word has length 65 [2021-06-05 21:16:04,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:16:04,308 INFO L482 AbstractCegarLoop]: Abstraction has 25834 states and 66847 transitions. [2021-06-05 21:16:04,308 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 3.78125) internal successors, (121), 31 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:04,308 INFO L276 IsEmpty]: Start isEmpty. Operand 25834 states and 66847 transitions. [2021-06-05 21:16:04,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 21:16:04,324 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:16:04,324 INFO L554 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:16:04,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 676 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1465 [2021-06-05 21:16:04,524 INFO L430 AbstractCegarLoop]: === Iteration 685 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:16:04,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:16:04,525 INFO L82 PathProgramCache]: Analyzing trace with hash 1130464013, now seen corresponding path program 421 times [2021-06-05 21:16:04,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:16:04,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016494439] [2021-06-05 21:16:04,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:16:04,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:16:04,640 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 57 proven. 169 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:16:04,640 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:16:04,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016494439] [2021-06-05 21:16:04,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016494439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:16:04,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133555197] [2021-06-05 21:16:04,641 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 677 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 677 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:16:04,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:16:04,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:16:04,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:16:04,766 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 57 proven. 169 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:16:04,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133555197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:16:04,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:16:04,767 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-06-05 21:16:04,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004782575] [2021-06-05 21:16:04,767 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:16:04,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:16:04,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:16:04,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:16:04,767 INFO L87 Difference]: Start difference. First operand 25834 states and 66847 transitions. Second operand has 16 states, 16 states have (on average 4.0) internal successors, (64), 15 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:05,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:16:05,063 INFO L93 Difference]: Finished difference Result 31663 states and 77216 transitions. [2021-06-05 21:16:05,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:16:05,064 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.0) internal successors, (64), 15 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 21:16:05,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:16:05,104 INFO L225 Difference]: With dead ends: 31663 [2021-06-05 21:16:05,104 INFO L226 Difference]: Without dead ends: 31621 [2021-06-05 21:16:05,104 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 131.3ms TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:16:05,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31621 states. [2021-06-05 21:16:05,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31621 to 25834. [2021-06-05 21:16:05,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25834 states, 25833 states have (on average 2.5873108040103743) internal successors, (66838), 25833 states have internal predecessors, (66838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:05,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25834 states to 25834 states and 66838 transitions. [2021-06-05 21:16:05,539 INFO L78 Accepts]: Start accepts. Automaton has 25834 states and 66838 transitions. Word has length 65 [2021-06-05 21:16:05,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:16:05,539 INFO L482 AbstractCegarLoop]: Abstraction has 25834 states and 66838 transitions. [2021-06-05 21:16:05,539 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.0) internal successors, (64), 15 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:05,539 INFO L276 IsEmpty]: Start isEmpty. Operand 25834 states and 66838 transitions. [2021-06-05 21:16:05,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 21:16:05,555 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:16:05,556 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:16:05,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 677 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1468 [2021-06-05 21:16:05,756 INFO L430 AbstractCegarLoop]: === Iteration 686 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:16:05,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:16:05,756 INFO L82 PathProgramCache]: Analyzing trace with hash -916422722, now seen corresponding path program 422 times [2021-06-05 21:16:05,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:16:05,756 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132799624] [2021-06-05 21:16:05,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:16:05,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:16:05,900 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 19 proven. 204 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:16:05,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:16:05,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132799624] [2021-06-05 21:16:05,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132799624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:16:05,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411687397] [2021-06-05 21:16:05,900 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 678 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 678 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:16:05,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:16:05,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:16:05,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 21:16:05,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:16:06,024 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 205 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:16:06,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411687397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:16:06,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:16:06,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-06-05 21:16:06,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480049237] [2021-06-05 21:16:06,025 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:16:06,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:16:06,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:16:06,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:16:06,025 INFO L87 Difference]: Start difference. First operand 25834 states and 66838 transitions. Second operand has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 16 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:10,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:16:10,225 INFO L93 Difference]: Finished difference Result 71126 states and 168440 transitions. [2021-06-05 21:16:10,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2021-06-05 21:16:10,225 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 16 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 21:16:10,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:16:10,316 INFO L225 Difference]: With dead ends: 71126 [2021-06-05 21:16:10,316 INFO L226 Difference]: Without dead ends: 69986 [2021-06-05 21:16:10,319 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15591 ImplicationChecksByTransitivity, 2837.6ms TimeCoverageRelationStatistics Valid=2433, Invalid=34623, Unknown=0, NotChecked=0, Total=37056 [2021-06-05 21:16:10,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69986 states. [2021-06-05 21:16:10,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69986 to 29289. [2021-06-05 21:16:10,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29289 states, 29288 states have (on average 2.5868615132477464) internal successors, (75764), 29288 states have internal predecessors, (75764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:11,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29289 states to 29289 states and 75764 transitions. [2021-06-05 21:16:11,031 INFO L78 Accepts]: Start accepts. Automaton has 29289 states and 75764 transitions. Word has length 65 [2021-06-05 21:16:11,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:16:11,031 INFO L482 AbstractCegarLoop]: Abstraction has 29289 states and 75764 transitions. [2021-06-05 21:16:11,031 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 16 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:11,031 INFO L276 IsEmpty]: Start isEmpty. Operand 29289 states and 75764 transitions. [2021-06-05 21:16:11,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 21:16:11,046 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:16:11,046 INFO L554 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:16:11,246 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 678 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1474 [2021-06-05 21:16:11,247 INFO L430 AbstractCegarLoop]: === Iteration 687 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:16:11,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:16:11,247 INFO L82 PathProgramCache]: Analyzing trace with hash -167005069, now seen corresponding path program 423 times [2021-06-05 21:16:11,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:16:11,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322625500] [2021-06-05 21:16:11,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:16:11,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:16:11,368 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 58 proven. 168 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:16:11,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:16:11,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322625500] [2021-06-05 21:16:11,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322625500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:16:11,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512379144] [2021-06-05 21:16:11,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 679 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 679 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:16:11,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-06-05 21:16:11,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:16:11,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:16:11,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:16:11,498 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 58 proven. 168 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:16:11,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512379144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:16:11,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:16:11,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2021-06-05 21:16:11,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134773020] [2021-06-05 21:16:11,499 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:16:11,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:16:11,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:16:11,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:16:11,499 INFO L87 Difference]: Start difference. First operand 29289 states and 75764 transitions. Second operand has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 16 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:11,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:16:11,831 INFO L93 Difference]: Finished difference Result 35769 states and 87381 transitions. [2021-06-05 21:16:11,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:16:11,831 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 16 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 21:16:11,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:16:11,875 INFO L225 Difference]: With dead ends: 35769 [2021-06-05 21:16:11,875 INFO L226 Difference]: Without dead ends: 35718 [2021-06-05 21:16:11,875 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 150.4ms TimeCoverageRelationStatistics Valid=147, Invalid=315, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:16:11,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35718 states. [2021-06-05 21:16:12,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35718 to 29289. [2021-06-05 21:16:12,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29289 states, 29288 states have (on average 2.5865542201584266) internal successors, (75755), 29288 states have internal predecessors, (75755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:12,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29289 states to 29289 states and 75755 transitions. [2021-06-05 21:16:12,364 INFO L78 Accepts]: Start accepts. Automaton has 29289 states and 75755 transitions. Word has length 65 [2021-06-05 21:16:12,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:16:12,364 INFO L482 AbstractCegarLoop]: Abstraction has 29289 states and 75755 transitions. [2021-06-05 21:16:12,364 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 16 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:12,364 INFO L276 IsEmpty]: Start isEmpty. Operand 29289 states and 75755 transitions. [2021-06-05 21:16:12,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 21:16:12,380 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:16:12,380 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:16:12,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 679 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1475 [2021-06-05 21:16:12,580 INFO L430 AbstractCegarLoop]: === Iteration 688 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:16:12,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:16:12,580 INFO L82 PathProgramCache]: Analyzing trace with hash 1555398216, now seen corresponding path program 424 times [2021-06-05 21:16:12,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:16:12,580 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41050903] [2021-06-05 21:16:12,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:16:12,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:16:12,873 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 19 proven. 204 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:16:12,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:16:12,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41050903] [2021-06-05 21:16:12,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41050903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:16:12,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370335735] [2021-06-05 21:16:12,873 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 680 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 680 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:16:12,901 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:16:12,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:16:12,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 21:16:12,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:16:13,024 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 205 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:16:13,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370335735] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:16:13,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:16:13,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-06-05 21:16:13,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131220028] [2021-06-05 21:16:13,025 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:16:13,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:16:13,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:16:13,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:16:13,025 INFO L87 Difference]: Start difference. First operand 29289 states and 75755 transitions. Second operand has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:20,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:16:20,394 INFO L93 Difference]: Finished difference Result 133248 states and 309294 transitions. [2021-06-05 21:16:20,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 321 states. [2021-06-05 21:16:20,395 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 21:16:20,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:16:20,617 INFO L225 Difference]: With dead ends: 133248 [2021-06-05 21:16:20,618 INFO L226 Difference]: Without dead ends: 129774 [2021-06-05 21:16:20,621 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 319 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46200 ImplicationChecksByTransitivity, 5589.3ms TimeCoverageRelationStatistics Valid=5835, Invalid=96885, Unknown=0, NotChecked=0, Total=102720 [2021-06-05 21:16:20,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129774 states. [2021-06-05 21:16:22,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129774 to 34615. [2021-06-05 21:16:22,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34615 states, 34614 states have (on average 2.584618940313168) internal successors, (89464), 34614 states have internal predecessors, (89464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:22,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34615 states to 34615 states and 89464 transitions. [2021-06-05 21:16:22,117 INFO L78 Accepts]: Start accepts. Automaton has 34615 states and 89464 transitions. Word has length 65 [2021-06-05 21:16:22,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:16:22,117 INFO L482 AbstractCegarLoop]: Abstraction has 34615 states and 89464 transitions. [2021-06-05 21:16:22,117 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:22,117 INFO L276 IsEmpty]: Start isEmpty. Operand 34615 states and 89464 transitions. [2021-06-05 21:16:22,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 21:16:22,133 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:16:22,134 INFO L554 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:16:22,334 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1482,680 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:16:22,334 INFO L430 AbstractCegarLoop]: === Iteration 689 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:16:22,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:16:22,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1637237069, now seen corresponding path program 425 times [2021-06-05 21:16:22,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:16:22,334 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380009674] [2021-06-05 21:16:22,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:16:22,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:16:22,614 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2021-06-05 21:16:22,719 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 65 proven. 161 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:16:22,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:16:22,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380009674] [2021-06-05 21:16:22,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380009674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:16:22,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902973817] [2021-06-05 21:16:22,719 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 681 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 681 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:16:22,751 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-06-05 21:16:22,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:16:22,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:16:22,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:16:22,880 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 65 proven. 161 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:16:22,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902973817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:16:22,880 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:16:22,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 21 [2021-06-05 21:16:22,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638493225] [2021-06-05 21:16:22,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:16:22,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:16:22,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:16:22,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:16:22,880 INFO L87 Difference]: Start difference. First operand 34615 states and 89464 transitions. Second operand has 22 states, 22 states have (on average 3.6818181818181817) internal successors, (81), 21 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:23,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:16:23,362 INFO L93 Difference]: Finished difference Result 42327 states and 103472 transitions. [2021-06-05 21:16:23,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:16:23,362 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.6818181818181817) internal successors, (81), 21 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 21:16:23,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:16:23,418 INFO L225 Difference]: With dead ends: 42327 [2021-06-05 21:16:23,418 INFO L226 Difference]: Without dead ends: 42267 [2021-06-05 21:16:23,418 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 253.2ms TimeCoverageRelationStatistics Valid=201, Invalid=555, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:16:23,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42267 states. [2021-06-05 21:16:23,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42267 to 34615. [2021-06-05 21:16:24,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34615 states, 34614 states have (on average 2.584358929912752) internal successors, (89455), 34614 states have internal predecessors, (89455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:24,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34615 states to 34615 states and 89455 transitions. [2021-06-05 21:16:24,100 INFO L78 Accepts]: Start accepts. Automaton has 34615 states and 89455 transitions. Word has length 65 [2021-06-05 21:16:24,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:16:24,100 INFO L482 AbstractCegarLoop]: Abstraction has 34615 states and 89455 transitions. [2021-06-05 21:16:24,100 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.6818181818181817) internal successors, (81), 21 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:24,100 INFO L276 IsEmpty]: Start isEmpty. Operand 34615 states and 89455 transitions. [2021-06-05 21:16:24,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 21:16:24,116 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:16:24,116 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:16:24,317 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1483,681 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:16:24,317 INFO L430 AbstractCegarLoop]: === Iteration 690 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:16:24,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:16:24,317 INFO L82 PathProgramCache]: Analyzing trace with hash -1936295042, now seen corresponding path program 426 times [2021-06-05 21:16:24,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:16:24,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169656053] [2021-06-05 21:16:24,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:16:24,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:16:24,535 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 19 proven. 204 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:16:24,536 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:16:24,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169656053] [2021-06-05 21:16:24,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169656053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:16:24,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485230193] [2021-06-05 21:16:24,536 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 682 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 682 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:16:24,580 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-06-05 21:16:24,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:16:24,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 21:16:24,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:16:25,272 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 21:16:25,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 16 [2021-06-05 21:16:25,274 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:16:25,281 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:16:25,281 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-06-05 21:16:25,282 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:16:25,282 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:32, output treesize:19 [2021-06-05 21:16:25,323 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 77 proven. 146 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:16:25,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485230193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:16:25,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:16:25,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20] total 37 [2021-06-05 21:16:25,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106153412] [2021-06-05 21:16:25,324 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 21:16:25,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:16:25,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 21:16:25,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1221, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 21:16:25,325 INFO L87 Difference]: Start difference. First operand 34615 states and 89455 transitions. Second operand has 38 states, 38 states have (on average 3.1842105263157894) internal successors, (121), 37 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2021-06-05 21:16:47,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 638 states. [2021-06-05 21:16:47,481 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1491,682 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:16:47,482 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 21:16:47,483 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 21:16:47,485 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 21:16:47,485 INFO L202 PluginConnector]: Adding new model array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 09:16:47 BasicIcfg [2021-06-05 21:16:47,485 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 21:16:47,486 INFO L168 Benchmark]: Toolchain (without parser) took 859044.63 ms. Allocated memory was 381.7 MB in the beginning and 3.6 GB in the end (delta: 3.2 GB). Free memory was 361.3 MB in the beginning and 2.5 GB in the end (delta: -2.1 GB). Peak memory consumption was 1.0 GB. Max. memory is 16.0 GB. [2021-06-05 21:16:47,486 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 381.7 MB. Free memory is still 362.3 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 21:16:47,486 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.30 ms. Allocated memory is still 381.7 MB. Free memory was 361.2 MB in the beginning and 359.7 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 21:16:47,486 INFO L168 Benchmark]: Boogie Preprocessor took 17.58 ms. Allocated memory is still 381.7 MB. Free memory was 359.7 MB in the beginning and 358.8 MB in the end (delta: 910.3 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 21:16:47,486 INFO L168 Benchmark]: RCFGBuilder took 279.45 ms. Allocated memory is still 381.7 MB. Free memory was 358.7 MB in the beginning and 347.7 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. [2021-06-05 21:16:47,486 INFO L168 Benchmark]: TraceAbstraction took 858717.00 ms. Allocated memory was 381.7 MB in the beginning and 3.6 GB in the end (delta: 3.2 GB). Free memory was 347.2 MB in the beginning and 2.5 GB in the end (delta: -2.2 GB). Peak memory consumption was 1.0 GB. Max. memory is 16.0 GB. [2021-06-05 21:16:47,486 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 0.13 ms. Allocated memory is still 381.7 MB. Free memory is still 362.3 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 25.30 ms. Allocated memory is still 381.7 MB. Free memory was 361.2 MB in the beginning and 359.7 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 17.58 ms. Allocated memory is still 381.7 MB. Free memory was 359.7 MB in the beginning and 358.8 MB in the end (delta: 910.3 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 279.45 ms. Allocated memory is still 381.7 MB. Free memory was 358.7 MB in the beginning and 347.7 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 858717.00 ms. Allocated memory was 381.7 MB in the beginning and 3.6 GB in the end (delta: 3.2 GB). Free memory was 347.2 MB in the beginning and 2.5 GB in the end (delta: -2.2 GB). Peak memory consumption was 1.0 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 57]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (34615states) and FLOYD_HOARE automaton (currently 638 states, 38 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 647 known predicates. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 36 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 858646.6ms, OverallIterations: 690, TraceHistogramMax: 10, EmptinessCheckTime: 5554.7ms, AutomataDifference: 440499.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 16.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 42915 SDtfs, 219222 SDslu, 296228 SDs, 0 SdLazy, 469629 SolverSat, 17415 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 172463.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 54645 GetRequests, 35564 SyntacticMatches, 809 SemanticMatches, 18271 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 850319 ImplicationChecksByTransitivity, 234000.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=34615occurred in iteration=688, InterpolantAutomatonStates: 17037, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 126086.0ms AutomataMinimizationTime, 689 MinimizatonAttempts, 2683458 StatesRemovedByMinimization, 686 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1944.7ms SsaConstructionTime, 10320.2ms SatisfiabilityAnalysisTime, 123520.1ms InterpolantComputationTime, 69168 NumberOfCodeBlocks, 69147 NumberOfCodeBlocksAsserted, 4642 NumberOfCheckSat, 67797 ConstructedInterpolants, 661 QuantifiedInterpolants, 524729 SizeOfPredicates, 1215 NumberOfNonLiveVariables, 79425 ConjunctsInSsa, 14813 ConjunctsInUnsatCore, 1371 InterpolantComputations, 11 PerfectInterpolantSequences, 59227/180187 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown