/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/popl20/difference-det.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2abb09bbbae98a04ae2fcc735832bfdba44f6fbc-2abb09b [2021-06-05 22:46:42,886 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 22:46:42,888 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 22:46:42,918 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 22:46:42,963 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 22:46:42,989 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 22:46:42,989 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 22:46:42,989 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 22:46:42,989 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 22:46:42,991 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 22:46:42,991 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 22:46:42,991 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 22:46:42,991 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 22:46:42,992 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 22:46:42,992 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 22:46:42,992 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 22:46:42,992 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 22:46:42,992 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 22:46:42,992 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 22:46:42,993 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 22:46:42,993 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 22:46:42,993 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 22:46:42,993 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 22:46:42,993 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 22:46:42,993 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 22:46:42,993 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 22:46:42,993 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 22:46:42,993 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 22:46:42,993 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 22:46:42,993 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 22:46:42,993 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 22:46:42,994 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 22:46:42,994 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 22:46:42,994 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 22:46:42,994 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 22:46:42,994 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 22:46:42,994 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 22:46:43,214 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 22:46:43,234 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 22:46:43,237 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 22:46:43,238 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 22:46:43,239 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 22:46:43,239 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/difference-det.wvr.bpl [2021-06-05 22:46:43,239 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/difference-det.wvr.bpl' [2021-06-05 22:46:43,266 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 22:46:43,267 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 22:46:43,268 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 22:46:43,268 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 22:46:43,268 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 22:46:43,289 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:46:43" (1/1) ... [2021-06-05 22:46:43,293 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:46:43" (1/1) ... [2021-06-05 22:46:43,299 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 22:46:43,300 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 22:46:43,300 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 22:46:43,301 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 22:46:43,306 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:46:43" (1/1) ... [2021-06-05 22:46:43,306 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:46:43" (1/1) ... [2021-06-05 22:46:43,307 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:46:43" (1/1) ... [2021-06-05 22:46:43,307 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:46:43" (1/1) ... [2021-06-05 22:46:43,311 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:46:43" (1/1) ... [2021-06-05 22:46:43,314 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:46:43" (1/1) ... [2021-06-05 22:46:43,315 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:46:43" (1/1) ... [2021-06-05 22:46:43,319 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 22:46:43,320 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 22:46:43,320 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 22:46:43,320 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 22:46:43,322 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:46:43" (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 22:46:43,373 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 22:46:43,373 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 22:46:43,373 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 22:46:43,373 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 22:46:43,373 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 22:46:43,373 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 22:46:43,374 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 22:46:43,374 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 22:46:43,374 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 22:46:43,374 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 22:46:43,374 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 22:46:43,374 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 22:46:43,374 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-06-05 22:46:43,374 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-06-05 22:46:43,374 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-06-05 22:46:43,375 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 22:46:43,640 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 22:46:43,641 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 22:46:43,642 INFO L202 PluginConnector]: Adding new model difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 10:46:43 BoogieIcfgContainer [2021-06-05 22:46:43,642 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 22:46:43,643 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 22:46:43,643 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 22:46:43,645 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 22:46:43,645 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:46:43" (1/2) ... [2021-06-05 22:46:43,646 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f8de238 and model type difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 10:46:43, skipping insertion in model container [2021-06-05 22:46:43,646 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 10:46:43" (2/2) ... [2021-06-05 22:46:43,647 INFO L111 eAbstractionObserver]: Analyzing ICFG difference-det.wvr.bpl [2021-06-05 22:46:43,650 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 22:46:43,651 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 22:46:43,651 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 22:46:43,651 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 22:46:43,728 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-06-05 22:46:43,745 INFO L255 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-06-05 22:46:43,768 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 22:46:43,768 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 22:46:43,769 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 22:46:43,769 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 22:46:43,769 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 22:46:43,769 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 22:46:43,769 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 22:46:43,769 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-05 22:46:43,778 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 49 places, 40 transitions, 112 flow [2021-06-05 22:46:43,816 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 438 states, 436 states have (on average 3.811926605504587) internal successors, (1662), 437 states have internal predecessors, (1662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:46:43,818 INFO L276 IsEmpty]: Start isEmpty. Operand has 438 states, 436 states have (on average 3.811926605504587) internal successors, (1662), 437 states have internal predecessors, (1662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:46:43,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 22:46:43,835 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:46:43,835 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:46:43,836 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:46:43,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:46:43,840 INFO L82 PathProgramCache]: Analyzing trace with hash 938246004, now seen corresponding path program 1 times [2021-06-05 22:46:43,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:46:43,846 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55261996] [2021-06-05 22:46:43,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:46:43,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:46:44,002 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 22:46:44,002 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:46:44,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55261996] [2021-06-05 22:46:44,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55261996] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:46:44,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:46:44,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 22:46:44,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766866549] [2021-06-05 22:46:44,006 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 22:46:44,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:46:44,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 22:46:44,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 22:46:44,017 INFO L87 Difference]: Start difference. First operand has 438 states, 436 states have (on average 3.811926605504587) internal successors, (1662), 437 states have internal predecessors, (1662), 0 states have call successors, (0), 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 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:46:44,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:46:44,077 INFO L93 Difference]: Finished difference Result 1268 states and 4623 transitions. [2021-06-05 22:46:44,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 22:46:44,078 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 22:46:44,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:46:44,098 INFO L225 Difference]: With dead ends: 1268 [2021-06-05 22:46:44,098 INFO L226 Difference]: Without dead ends: 1057 [2021-06-05 22:46:44,099 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:46:44,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1057 states. [2021-06-05 22:46:44,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1057 to 776. [2021-06-05 22:46:44,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 776 states, 775 states have (on average 3.7716129032258063) internal successors, (2923), 775 states have internal predecessors, (2923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:46:44,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 2923 transitions. [2021-06-05 22:46:44,175 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 2923 transitions. Word has length 26 [2021-06-05 22:46:44,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:46:44,175 INFO L482 AbstractCegarLoop]: Abstraction has 776 states and 2923 transitions. [2021-06-05 22:46:44,176 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:46:44,176 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 2923 transitions. [2021-06-05 22:46:44,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 22:46:44,179 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:46:44,179 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:46:44,179 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 22:46:44,179 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:46:44,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:46:44,180 INFO L82 PathProgramCache]: Analyzing trace with hash 1581838450, now seen corresponding path program 1 times [2021-06-05 22:46:44,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:46:44,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44356276] [2021-06-05 22:46:44,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:46:44,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:46:44,232 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 22:46:44,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:46:44,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44356276] [2021-06-05 22:46:44,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44356276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:46:44,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863812437] [2021-06-05 22:46:44,233 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 22:46:44,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:46:44,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 22:46:44,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:46:44,447 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 22:46:44,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863812437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:46:44,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:46:44,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2021-06-05 22:46:44,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495362094] [2021-06-05 22:46:44,449 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:46:44,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:46:44,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:46:44,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:46:44,450 INFO L87 Difference]: Start difference. First operand 776 states and 2923 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 22:46:44,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:46:44,547 INFO L93 Difference]: Finished difference Result 1233 states and 4561 transitions. [2021-06-05 22:46:44,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 22:46:44,548 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 22:46:44,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:46:44,554 INFO L225 Difference]: With dead ends: 1233 [2021-06-05 22:46:44,554 INFO L226 Difference]: Without dead ends: 1233 [2021-06-05 22:46:44,555 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 90.7ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:46:44,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1233 states. [2021-06-05 22:46:44,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1233 to 868. [2021-06-05 22:46:44,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 867 states have (on average 3.795847750865052) internal successors, (3291), 867 states have internal predecessors, (3291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:46:44,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 3291 transitions. [2021-06-05 22:46:44,587 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 3291 transitions. Word has length 28 [2021-06-05 22:46:44,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:46:44,588 INFO L482 AbstractCegarLoop]: Abstraction has 868 states and 3291 transitions. [2021-06-05 22:46:44,588 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 22:46:44,588 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 3291 transitions. [2021-06-05 22:46:44,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 22:46:44,590 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:46:44,590 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:46:44,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-06-05 22:46:44,805 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:46:44,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:46:44,806 INFO L82 PathProgramCache]: Analyzing trace with hash -2014079724, now seen corresponding path program 1 times [2021-06-05 22:46:44,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:46:44,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8605449] [2021-06-05 22:46:44,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:46:44,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:46:44,839 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 22:46:44,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:46:44,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8605449] [2021-06-05 22:46:44,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8605449] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:46:44,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:46:44,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 22:46:44,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765168023] [2021-06-05 22:46:44,840 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 22:46:44,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:46:44,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 22:46:44,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 22:46:44,841 INFO L87 Difference]: Start difference. First operand 868 states and 3291 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 22:46:44,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:46:44,891 INFO L93 Difference]: Finished difference Result 1101 states and 3979 transitions. [2021-06-05 22:46:44,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 22:46:44,892 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 28 [2021-06-05 22:46:44,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:46:44,897 INFO L225 Difference]: With dead ends: 1101 [2021-06-05 22:46:44,897 INFO L226 Difference]: Without dead ends: 1047 [2021-06-05 22:46:44,898 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 28.7ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-06-05 22:46:44,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1047 states. [2021-06-05 22:46:44,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1047 to 912. [2021-06-05 22:46:44,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 912 states, 911 states have (on average 3.773874862788145) internal successors, (3438), 911 states have internal predecessors, (3438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:46:44,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 912 states to 912 states and 3438 transitions. [2021-06-05 22:46:44,926 INFO L78 Accepts]: Start accepts. Automaton has 912 states and 3438 transitions. Word has length 28 [2021-06-05 22:46:44,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:46:44,926 INFO L482 AbstractCegarLoop]: Abstraction has 912 states and 3438 transitions. [2021-06-05 22:46:44,926 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 22:46:44,926 INFO L276 IsEmpty]: Start isEmpty. Operand 912 states and 3438 transitions. [2021-06-05 22:46:44,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 22:46:44,929 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:46:44,929 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:46:44,929 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 22:46:44,929 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:46:44,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:46:44,930 INFO L82 PathProgramCache]: Analyzing trace with hash -1366009100, now seen corresponding path program 2 times [2021-06-05 22:46:44,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:46:44,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728470571] [2021-06-05 22:46:44,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:46:44,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:46:44,981 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 22:46:44,982 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:46:44,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728470571] [2021-06-05 22:46:44,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728470571] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:46:44,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:46:44,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 22:46:44,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040918618] [2021-06-05 22:46:44,987 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 22:46:44,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:46:44,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 22:46:44,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 22:46:44,989 INFO L87 Difference]: Start difference. First operand 912 states and 3438 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 22:46:45,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:46:45,041 INFO L93 Difference]: Finished difference Result 834 states and 3134 transitions. [2021-06-05 22:46:45,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 22:46:45,041 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 28 [2021-06-05 22:46:45,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:46:45,046 INFO L225 Difference]: With dead ends: 834 [2021-06-05 22:46:45,046 INFO L226 Difference]: Without dead ends: 834 [2021-06-05 22:46:45,046 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 36.1ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-06-05 22:46:45,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 834 states. [2021-06-05 22:46:45,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 834 to 774. [2021-06-05 22:46:45,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 774 states, 773 states have (on average 3.8007761966364813) internal successors, (2938), 773 states have internal predecessors, (2938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:46:45,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 774 states to 774 states and 2938 transitions. [2021-06-05 22:46:45,068 INFO L78 Accepts]: Start accepts. Automaton has 774 states and 2938 transitions. Word has length 28 [2021-06-05 22:46:45,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:46:45,068 INFO L482 AbstractCegarLoop]: Abstraction has 774 states and 2938 transitions. [2021-06-05 22:46:45,069 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 22:46:45,069 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states and 2938 transitions. [2021-06-05 22:46:45,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 22:46:45,070 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:46:45,070 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:46:45,071 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 22:46:45,071 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:46:45,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:46:45,071 INFO L82 PathProgramCache]: Analyzing trace with hash -718106448, now seen corresponding path program 2 times [2021-06-05 22:46:45,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:46:45,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267498601] [2021-06-05 22:46:45,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:46:45,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:46:45,131 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 22:46:45,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:46:45,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267498601] [2021-06-05 22:46:45,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267498601] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:46:45,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:46:45,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 22:46:45,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505694902] [2021-06-05 22:46:45,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 22:46:45,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:46:45,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 22:46:45,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 22:46:45,134 INFO L87 Difference]: Start difference. First operand 774 states and 2938 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 22:46:45,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:46:45,191 INFO L93 Difference]: Finished difference Result 878 states and 3300 transitions. [2021-06-05 22:46:45,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 22:46:45,192 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 28 [2021-06-05 22:46:45,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:46:45,196 INFO L225 Difference]: With dead ends: 878 [2021-06-05 22:46:45,197 INFO L226 Difference]: Without dead ends: 838 [2021-06-05 22:46:45,197 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 37.5ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:46:45,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 838 states. [2021-06-05 22:46:45,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 838 to 726. [2021-06-05 22:46:45,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 726 states, 725 states have (on average 3.8096551724137933) internal successors, (2762), 725 states have internal predecessors, (2762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:46:45,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 726 states to 726 states and 2762 transitions. [2021-06-05 22:46:45,218 INFO L78 Accepts]: Start accepts. Automaton has 726 states and 2762 transitions. Word has length 28 [2021-06-05 22:46:45,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:46:45,219 INFO L482 AbstractCegarLoop]: Abstraction has 726 states and 2762 transitions. [2021-06-05 22:46:45,219 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 22:46:45,219 INFO L276 IsEmpty]: Start isEmpty. Operand 726 states and 2762 transitions. [2021-06-05 22:46:45,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:46:45,224 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:46:45,224 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:46:45,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 22:46:45,224 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:46:45,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:46:45,225 INFO L82 PathProgramCache]: Analyzing trace with hash -1997029742, now seen corresponding path program 1 times [2021-06-05 22:46:45,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:46:45,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520711042] [2021-06-05 22:46:45,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:46:45,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:46:45,305 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 22:46:45,305 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:46:45,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520711042] [2021-06-05 22:46:45,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520711042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:46:45,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447631759] [2021-06-05 22:46:45,306 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 22:46:45,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:46:45,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 22:46:45,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:46:45,480 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 22:46:45,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447631759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:46:45,483 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:46:45,483 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 8 [2021-06-05 22:46:45,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787855344] [2021-06-05 22:46:45,483 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 22:46:45,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:46:45,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 22:46:45,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 22:46:45,488 INFO L87 Difference]: Start difference. First operand 726 states and 2762 transitions. Second operand has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:46:45,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:46:45,557 INFO L93 Difference]: Finished difference Result 3314 states and 12458 transitions. [2021-06-05 22:46:45,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 22:46:45,559 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:46:45,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:46:45,574 INFO L225 Difference]: With dead ends: 3314 [2021-06-05 22:46:45,575 INFO L226 Difference]: Without dead ends: 3000 [2021-06-05 22:46:45,575 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 47.5ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 22:46:45,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3000 states. [2021-06-05 22:46:45,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3000 to 2163. [2021-06-05 22:46:45,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2163 states, 2162 states have (on average 4.01063829787234) internal successors, (8671), 2162 states have internal predecessors, (8671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:46:45,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2163 states to 2163 states and 8671 transitions. [2021-06-05 22:46:45,640 INFO L78 Accepts]: Start accepts. Automaton has 2163 states and 8671 transitions. Word has length 30 [2021-06-05 22:46:45,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:46:45,640 INFO L482 AbstractCegarLoop]: Abstraction has 2163 states and 8671 transitions. [2021-06-05 22:46:45,640 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:46:45,641 INFO L276 IsEmpty]: Start isEmpty. Operand 2163 states and 8671 transitions. [2021-06-05 22:46:45,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:46:45,645 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:46:45,646 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:46:45,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:46:45,857 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:46:45,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:46:45,857 INFO L82 PathProgramCache]: Analyzing trace with hash -390423246, now seen corresponding path program 2 times [2021-06-05 22:46:45,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:46:45,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417912615] [2021-06-05 22:46:45,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:46:45,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:46:45,902 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 22:46:45,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:46:45,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417912615] [2021-06-05 22:46:45,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417912615] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:46:45,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:46:45,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 22:46:45,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684659394] [2021-06-05 22:46:45,904 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 22:46:45,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:46:45,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 22:46:45,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:46:45,906 INFO L87 Difference]: Start difference. First operand 2163 states and 8671 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 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 22:46:45,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:46:45,965 INFO L93 Difference]: Finished difference Result 3426 states and 13470 transitions. [2021-06-05 22:46:45,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 22:46:45,965 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 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 30 [2021-06-05 22:46:45,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:46:45,983 INFO L225 Difference]: With dead ends: 3426 [2021-06-05 22:46:45,983 INFO L226 Difference]: Without dead ends: 3395 [2021-06-05 22:46:45,984 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 32.8ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:46:45,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3395 states. [2021-06-05 22:46:46,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3395 to 2948. [2021-06-05 22:46:46,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2948 states, 2947 states have (on average 4.058025110281642) internal successors, (11959), 2947 states have internal predecessors, (11959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:46:46,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2948 states to 2948 states and 11959 transitions. [2021-06-05 22:46:46,063 INFO L78 Accepts]: Start accepts. Automaton has 2948 states and 11959 transitions. Word has length 30 [2021-06-05 22:46:46,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:46:46,064 INFO L482 AbstractCegarLoop]: Abstraction has 2948 states and 11959 transitions. [2021-06-05 22:46:46,064 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 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 22:46:46,064 INFO L276 IsEmpty]: Start isEmpty. Operand 2948 states and 11959 transitions. [2021-06-05 22:46:46,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:46:46,071 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:46:46,071 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:46:46,071 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-05 22:46:46,071 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:46:46,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:46:46,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1503101072, now seen corresponding path program 3 times [2021-06-05 22:46:46,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:46:46,072 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086421921] [2021-06-05 22:46:46,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:46:46,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:46:46,120 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:46:46,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:46:46,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086421921] [2021-06-05 22:46:46,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086421921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:46:46,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427324851] [2021-06-05 22:46:46,121 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 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 22:46:46,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:46:46,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:46:46,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 22:46:46,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:46:46,281 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:46:46,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427324851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:46:46,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:46:46,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-06-05 22:46:46,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602535307] [2021-06-05 22:46:46,282 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:46:46,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:46:46,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:46:46,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:46:46,283 INFO L87 Difference]: Start difference. First operand 2948 states and 11959 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 22:46:46,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:46:46,624 INFO L93 Difference]: Finished difference Result 10235 states and 40121 transitions. [2021-06-05 22:46:46,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:46:46,624 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 22:46:46,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:46:46,667 INFO L225 Difference]: With dead ends: 10235 [2021-06-05 22:46:46,667 INFO L226 Difference]: Without dead ends: 10235 [2021-06-05 22:46:46,667 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 223.0ms TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:46:46,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10235 states. [2021-06-05 22:46:46,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10235 to 4372. [2021-06-05 22:46:46,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4372 states, 4371 states have (on average 4.153511782200869) internal successors, (18155), 4371 states have internal predecessors, (18155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:46:46,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4372 states to 4372 states and 18155 transitions. [2021-06-05 22:46:46,834 INFO L78 Accepts]: Start accepts. Automaton has 4372 states and 18155 transitions. Word has length 32 [2021-06-05 22:46:46,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:46:46,834 INFO L482 AbstractCegarLoop]: Abstraction has 4372 states and 18155 transitions. [2021-06-05 22:46:46,834 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 22:46:46,834 INFO L276 IsEmpty]: Start isEmpty. Operand 4372 states and 18155 transitions. [2021-06-05 22:46:46,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:46:46,844 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:46:46,844 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:46:47,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:46:47,061 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:46:47,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:46:47,061 INFO L82 PathProgramCache]: Analyzing trace with hash 1838023666, now seen corresponding path program 1 times [2021-06-05 22:46:47,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:46:47,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035790972] [2021-06-05 22:46:47,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:46:47,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:46:47,095 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 22:46:47,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:46:47,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035790972] [2021-06-05 22:46:47,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035790972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:46:47,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077394316] [2021-06-05 22:46:47,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 22:46:47,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:46:47,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 22:46:47,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:46:47,209 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 22:46:47,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077394316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:46:47,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:46:47,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-06-05 22:46:47,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012329583] [2021-06-05 22:46:47,210 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:46:47,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:46:47,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:46:47,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:46:47,211 INFO L87 Difference]: Start difference. First operand 4372 states and 18155 transitions. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:46:47,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:46:47,327 INFO L93 Difference]: Finished difference Result 8631 states and 35204 transitions. [2021-06-05 22:46:47,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 22:46:47,327 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 22:46:47,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:46:47,354 INFO L225 Difference]: With dead ends: 8631 [2021-06-05 22:46:47,354 INFO L226 Difference]: Without dead ends: 8631 [2021-06-05 22:46:47,354 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 78.4ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:46:47,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8631 states. [2021-06-05 22:46:47,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8631 to 5549. [2021-06-05 22:46:47,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5549 states, 5548 states have (on average 4.195385724585436) internal successors, (23276), 5548 states have internal predecessors, (23276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:46:47,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5549 states to 5549 states and 23276 transitions. [2021-06-05 22:46:47,549 INFO L78 Accepts]: Start accepts. Automaton has 5549 states and 23276 transitions. Word has length 32 [2021-06-05 22:46:47,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:46:47,549 INFO L482 AbstractCegarLoop]: Abstraction has 5549 states and 23276 transitions. [2021-06-05 22:46:47,549 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:46:47,550 INFO L276 IsEmpty]: Start isEmpty. Operand 5549 states and 23276 transitions. [2021-06-05 22:46:47,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:46:47,563 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:46:47,563 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:46:47,782 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:46:47,782 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:46:47,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:46:47,782 INFO L82 PathProgramCache]: Analyzing trace with hash 1673971284, now seen corresponding path program 4 times [2021-06-05 22:46:47,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:46:47,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105723273] [2021-06-05 22:46:47,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:46:47,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:46:47,867 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:46:47,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:46:47,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105723273] [2021-06-05 22:46:47,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105723273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:46:47,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787738612] [2021-06-05 22:46:47,867 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 22:46:47,897 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:46:47,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:46:47,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 22:46:47,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:46:47,996 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:46:47,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787738612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:46:47,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:46:47,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 22:46:47,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660775147] [2021-06-05 22:46:47,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:46:47,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:46:47,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:46:47,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:46:47,998 INFO L87 Difference]: Start difference. First operand 5549 states and 23276 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 22:46:48,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:46:48,334 INFO L93 Difference]: Finished difference Result 15361 states and 62588 transitions. [2021-06-05 22:46:48,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:46:48,335 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 32 [2021-06-05 22:46:48,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:46:48,388 INFO L225 Difference]: With dead ends: 15361 [2021-06-05 22:46:48,388 INFO L226 Difference]: Without dead ends: 15091 [2021-06-05 22:46:48,389 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 224.6ms TimeCoverageRelationStatistics Valid=177, Invalid=473, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:46:48,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15091 states. [2021-06-05 22:46:48,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15091 to 8451. [2021-06-05 22:46:48,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8451 states, 8450 states have (on average 4.295739644970414) internal successors, (36299), 8450 states have internal predecessors, (36299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:46:48,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8451 states to 8451 states and 36299 transitions. [2021-06-05 22:46:48,710 INFO L78 Accepts]: Start accepts. Automaton has 8451 states and 36299 transitions. Word has length 32 [2021-06-05 22:46:48,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:46:48,710 INFO L482 AbstractCegarLoop]: Abstraction has 8451 states and 36299 transitions. [2021-06-05 22:46:48,710 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 22:46:48,710 INFO L276 IsEmpty]: Start isEmpty. Operand 8451 states and 36299 transitions. [2021-06-05 22:46:48,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:46:48,761 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:46:48,761 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:46:48,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-05 22:46:48,976 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:46:48,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:46:48,977 INFO L82 PathProgramCache]: Analyzing trace with hash -223038192, now seen corresponding path program 1 times [2021-06-05 22:46:48,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:46:48,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193841152] [2021-06-05 22:46:48,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:46:48,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:46:49,100 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 22:46:49,100 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:46:49,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193841152] [2021-06-05 22:46:49,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193841152] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:46:49,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:46:49,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 22:46:49,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218684699] [2021-06-05 22:46:49,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 22:46:49,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:46:49,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 22:46:49,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 22:46:49,103 INFO L87 Difference]: Start difference. First operand 8451 states and 36299 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 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 22:46:49,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:46:49,201 INFO L93 Difference]: Finished difference Result 11634 states and 49174 transitions. [2021-06-05 22:46:49,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 22:46:49,201 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 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 22:46:49,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:46:49,238 INFO L225 Difference]: With dead ends: 11634 [2021-06-05 22:46:49,238 INFO L226 Difference]: Without dead ends: 11496 [2021-06-05 22:46:49,238 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 29.7ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-06-05 22:46:49,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11496 states. [2021-06-05 22:46:49,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11496 to 9206. [2021-06-05 22:46:49,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9206 states, 9205 states have (on average 4.329277566539924) internal successors, (39851), 9205 states have internal predecessors, (39851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:46:49,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9206 states to 9206 states and 39851 transitions. [2021-06-05 22:46:49,521 INFO L78 Accepts]: Start accepts. Automaton has 9206 states and 39851 transitions. Word has length 32 [2021-06-05 22:46:49,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:46:49,521 INFO L482 AbstractCegarLoop]: Abstraction has 9206 states and 39851 transitions. [2021-06-05 22:46:49,521 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 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 22:46:49,521 INFO L276 IsEmpty]: Start isEmpty. Operand 9206 states and 39851 transitions. [2021-06-05 22:46:49,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:46:49,540 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:46:49,540 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:46:49,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-06-05 22:46:49,540 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:46:49,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:46:49,541 INFO L82 PathProgramCache]: Analyzing trace with hash -981023376, now seen corresponding path program 2 times [2021-06-05 22:46:49,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:46:49,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966628985] [2021-06-05 22:46:49,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:46:49,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:46:49,571 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 22:46:49,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:46:49,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966628985] [2021-06-05 22:46:49,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966628985] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:46:49,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:46:49,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 22:46:49,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293758461] [2021-06-05 22:46:49,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 22:46:49,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:46:49,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 22:46:49,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 22:46:49,575 INFO L87 Difference]: Start difference. First operand 9206 states and 39851 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 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 22:46:49,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:46:49,713 INFO L93 Difference]: Finished difference Result 10977 states and 46247 transitions. [2021-06-05 22:46:49,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 22:46:49,714 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 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 22:46:49,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:46:49,740 INFO L225 Difference]: With dead ends: 10977 [2021-06-05 22:46:49,740 INFO L226 Difference]: Without dead ends: 10950 [2021-06-05 22:46:49,741 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 38.1ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-06-05 22:46:49,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10950 states. [2021-06-05 22:46:49,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10950 to 9177. [2021-06-05 22:46:49,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9177 states, 9176 states have (on average 4.283129904097646) internal successors, (39302), 9176 states have internal predecessors, (39302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:46:50,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9177 states to 9177 states and 39302 transitions. [2021-06-05 22:46:50,035 INFO L78 Accepts]: Start accepts. Automaton has 9177 states and 39302 transitions. Word has length 32 [2021-06-05 22:46:50,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:46:50,036 INFO L482 AbstractCegarLoop]: Abstraction has 9177 states and 39302 transitions. [2021-06-05 22:46:50,036 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 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 22:46:50,036 INFO L276 IsEmpty]: Start isEmpty. Operand 9177 states and 39302 transitions. [2021-06-05 22:46:50,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:46:50,059 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:46:50,059 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:46:50,059 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-06-05 22:46:50,060 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:46:50,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:46:50,060 INFO L82 PathProgramCache]: Analyzing trace with hash -626249420, now seen corresponding path program 2 times [2021-06-05 22:46:50,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:46:50,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631883943] [2021-06-05 22:46:50,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:46:50,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:46:50,101 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 22:46:50,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:46:50,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631883943] [2021-06-05 22:46:50,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631883943] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:46:50,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:46:50,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 22:46:50,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009407712] [2021-06-05 22:46:50,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 22:46:50,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:46:50,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 22:46:50,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 22:46:50,103 INFO L87 Difference]: Start difference. First operand 9177 states and 39302 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 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 22:46:50,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:46:50,205 INFO L93 Difference]: Finished difference Result 11062 states and 46211 transitions. [2021-06-05 22:46:50,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 22:46:50,206 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 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 22:46:50,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:46:50,384 INFO L225 Difference]: With dead ends: 11062 [2021-06-05 22:46:50,385 INFO L226 Difference]: Without dead ends: 11002 [2021-06-05 22:46:50,385 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 31.1ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:46:50,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11002 states. [2021-06-05 22:46:50,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11002 to 9261. [2021-06-05 22:46:50,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9261 states, 9260 states have (on average 4.27645788336933) internal successors, (39600), 9260 states have internal predecessors, (39600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:46:50,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9261 states to 9261 states and 39600 transitions. [2021-06-05 22:46:50,686 INFO L78 Accepts]: Start accepts. Automaton has 9261 states and 39600 transitions. Word has length 32 [2021-06-05 22:46:50,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:46:50,687 INFO L482 AbstractCegarLoop]: Abstraction has 9261 states and 39600 transitions. [2021-06-05 22:46:50,687 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 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 22:46:50,687 INFO L276 IsEmpty]: Start isEmpty. Operand 9261 states and 39600 transitions. [2021-06-05 22:46:50,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:46:50,707 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:46:50,707 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:46:50,707 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-06-05 22:46:50,707 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:46:50,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:46:50,708 INFO L82 PathProgramCache]: Analyzing trace with hash 1035058804, now seen corresponding path program 5 times [2021-06-05 22:46:50,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:46:50,708 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793915987] [2021-06-05 22:46:50,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:46:50,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:46:50,749 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:46:50,749 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:46:50,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793915987] [2021-06-05 22:46:50,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793915987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:46:50,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971336749] [2021-06-05 22:46:50,749 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 22:46:50,781 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:46:50,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:46:50,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 22:46:50,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:46:50,965 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:46:50,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971336749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:46:50,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:46:50,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-06-05 22:46:50,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730116533] [2021-06-05 22:46:50,966 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:46:50,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:46:50,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:46:50,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:46:50,966 INFO L87 Difference]: Start difference. First operand 9261 states and 39600 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 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 22:46:51,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:46:51,328 INFO L93 Difference]: Finished difference Result 17289 states and 70842 transitions. [2021-06-05 22:46:51,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:46:51,328 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 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 32 [2021-06-05 22:46:51,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:46:51,369 INFO L225 Difference]: With dead ends: 17289 [2021-06-05 22:46:51,370 INFO L226 Difference]: Without dead ends: 17289 [2021-06-05 22:46:51,370 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 202.5ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:46:51,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17289 states. [2021-06-05 22:46:51,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17289 to 10772. [2021-06-05 22:46:51,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10772 states, 10771 states have (on average 4.3019218271284005) internal successors, (46336), 10771 states have internal predecessors, (46336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:46:51,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10772 states to 10772 states and 46336 transitions. [2021-06-05 22:46:51,732 INFO L78 Accepts]: Start accepts. Automaton has 10772 states and 46336 transitions. Word has length 32 [2021-06-05 22:46:51,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:46:51,732 INFO L482 AbstractCegarLoop]: Abstraction has 10772 states and 46336 transitions. [2021-06-05 22:46:51,732 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 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 22:46:51,732 INFO L276 IsEmpty]: Start isEmpty. Operand 10772 states and 46336 transitions. [2021-06-05 22:46:51,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:46:51,759 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:46:51,759 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:46:51,963 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:46:51,964 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:46:51,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:46:51,964 INFO L82 PathProgramCache]: Analyzing trace with hash 1682961456, now seen corresponding path program 6 times [2021-06-05 22:46:51,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:46:51,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144165680] [2021-06-05 22:46:51,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:46:51,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:46:51,996 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:46:51,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:46:51,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144165680] [2021-06-05 22:46:51,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144165680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:46:51,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473406926] [2021-06-05 22:46:51,997 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 22:46:52,037 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:46:52,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:46:52,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 22:46:52,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:46:52,140 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:46:52,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473406926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:46:52,141 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:46:52,141 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-06-05 22:46:52,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971453145] [2021-06-05 22:46:52,141 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:46:52,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:46:52,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:46:52,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:46:52,142 INFO L87 Difference]: Start difference. First operand 10772 states and 46336 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 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 22:46:52,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:46:52,538 INFO L93 Difference]: Finished difference Result 17283 states and 70897 transitions. [2021-06-05 22:46:52,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:46:52,539 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 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 32 [2021-06-05 22:46:52,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:46:52,583 INFO L225 Difference]: With dead ends: 17283 [2021-06-05 22:46:52,583 INFO L226 Difference]: Without dead ends: 17145 [2021-06-05 22:46:52,583 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 216.6ms TimeCoverageRelationStatistics Valid=176, Invalid=424, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:46:52,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17145 states. [2021-06-05 22:46:52,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17145 to 10795. [2021-06-05 22:46:52,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10795 states, 10794 states have (on average 4.285158421345192) internal successors, (46254), 10794 states have internal predecessors, (46254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:46:52,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10795 states to 10795 states and 46254 transitions. [2021-06-05 22:46:52,855 INFO L78 Accepts]: Start accepts. Automaton has 10795 states and 46254 transitions. Word has length 32 [2021-06-05 22:46:52,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:46:52,855 INFO L482 AbstractCegarLoop]: Abstraction has 10795 states and 46254 transitions. [2021-06-05 22:46:52,855 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 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 22:46:52,855 INFO L276 IsEmpty]: Start isEmpty. Operand 10795 states and 46254 transitions. [2021-06-05 22:46:52,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:46:52,874 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:46:52,874 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:46:53,074 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 22:46:53,075 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:46:53,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:46:53,075 INFO L82 PathProgramCache]: Analyzing trace with hash -915931212, now seen corresponding path program 7 times [2021-06-05 22:46:53,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:46:53,075 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197778392] [2021-06-05 22:46:53,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:46:53,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:46:53,112 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:46:53,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:46:53,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197778392] [2021-06-05 22:46:53,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197778392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:46:53,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937784973] [2021-06-05 22:46:53,113 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 22:46:53,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:46:53,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 22:46:53,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:46:53,321 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:46:53,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937784973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:46:53,322 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:46:53,322 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 22:46:53,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022758204] [2021-06-05 22:46:53,322 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:46:53,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:46:53,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:46:53,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:46:53,323 INFO L87 Difference]: Start difference. First operand 10795 states and 46254 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 22:46:53,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:46:53,705 INFO L93 Difference]: Finished difference Result 26096 states and 108482 transitions. [2021-06-05 22:46:53,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:46:53,705 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 32 [2021-06-05 22:46:53,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:46:53,780 INFO L225 Difference]: With dead ends: 26096 [2021-06-05 22:46:53,780 INFO L226 Difference]: Without dead ends: 26096 [2021-06-05 22:46:53,781 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 226.0ms TimeCoverageRelationStatistics Valid=218, Invalid=484, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:46:53,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26096 states. [2021-06-05 22:46:54,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26096 to 14993. [2021-06-05 22:46:54,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14993 states, 14992 states have (on average 4.368729989327641) internal successors, (65496), 14992 states have internal predecessors, (65496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:46:54,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14993 states to 14993 states and 65496 transitions. [2021-06-05 22:46:54,301 INFO L78 Accepts]: Start accepts. Automaton has 14993 states and 65496 transitions. Word has length 32 [2021-06-05 22:46:54,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:46:54,301 INFO L482 AbstractCegarLoop]: Abstraction has 14993 states and 65496 transitions. [2021-06-05 22:46:54,301 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 22:46:54,301 INFO L276 IsEmpty]: Start isEmpty. Operand 14993 states and 65496 transitions. [2021-06-05 22:46:54,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:46:54,331 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:46:54,331 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:46:54,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-05 22:46:54,532 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:46:54,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:46:54,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1035025234, now seen corresponding path program 8 times [2021-06-05 22:46:54,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:46:54,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883889077] [2021-06-05 22:46:54,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:46:54,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:46:54,585 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:46:54,586 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:46:54,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883889077] [2021-06-05 22:46:54,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883889077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:46:54,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558266010] [2021-06-05 22:46:54,586 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 22:46:54,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:46:54,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:46:54,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 22:46:54,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:46:54,751 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:46:54,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558266010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:46:54,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:46:54,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-06-05 22:46:54,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262464931] [2021-06-05 22:46:54,752 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:46:54,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:46:54,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:46:54,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:46:54,752 INFO L87 Difference]: Start difference. First operand 14993 states and 65496 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 22:46:55,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:46:55,127 INFO L93 Difference]: Finished difference Result 19071 states and 81167 transitions. [2021-06-05 22:46:55,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:46:55,127 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 32 [2021-06-05 22:46:55,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:46:55,174 INFO L225 Difference]: With dead ends: 19071 [2021-06-05 22:46:55,174 INFO L226 Difference]: Without dead ends: 19009 [2021-06-05 22:46:55,175 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 265.5ms TimeCoverageRelationStatistics Valid=129, Invalid=333, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:46:55,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19009 states. [2021-06-05 22:46:55,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19009 to 15495. [2021-06-05 22:46:55,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15495 states, 15494 states have (on average 4.3805344004130635) internal successors, (67872), 15494 states have internal predecessors, (67872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:46:55,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15495 states to 15495 states and 67872 transitions. [2021-06-05 22:46:55,513 INFO L78 Accepts]: Start accepts. Automaton has 15495 states and 67872 transitions. Word has length 32 [2021-06-05 22:46:55,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:46:55,514 INFO L482 AbstractCegarLoop]: Abstraction has 15495 states and 67872 transitions. [2021-06-05 22:46:55,514 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 22:46:55,514 INFO L276 IsEmpty]: Start isEmpty. Operand 15495 states and 67872 transitions. [2021-06-05 22:46:55,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:46:55,543 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:46:55,543 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:46:55,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 22:46:55,749 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:46:55,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:46:55,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1628603050, now seen corresponding path program 9 times [2021-06-05 22:46:55,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:46:55,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967091452] [2021-06-05 22:46:55,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:46:55,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:46:55,782 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:46:55,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:46:55,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967091452] [2021-06-05 22:46:55,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967091452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:46:55,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896618002] [2021-06-05 22:46:55,783 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 22:46:55,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:46:55,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:46:55,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 22:46:55,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:46:55,919 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:46:55,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896618002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:46:55,919 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:46:55,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-06-05 22:46:55,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314912883] [2021-06-05 22:46:55,920 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:46:55,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:46:55,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:46:55,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:46:55,920 INFO L87 Difference]: Start difference. First operand 15495 states and 67872 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 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 22:46:56,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:46:56,285 INFO L93 Difference]: Finished difference Result 25596 states and 106759 transitions. [2021-06-05 22:46:56,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:46:56,286 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 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 32 [2021-06-05 22:46:56,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:46:56,358 INFO L225 Difference]: With dead ends: 25596 [2021-06-05 22:46:56,358 INFO L226 Difference]: Without dead ends: 25518 [2021-06-05 22:46:56,359 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 187.0ms TimeCoverageRelationStatistics Valid=168, Invalid=384, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:46:56,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25518 states. [2021-06-05 22:46:56,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25518 to 15518. [2021-06-05 22:46:56,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15518 states, 15517 states have (on average 4.374299155764645) internal successors, (67876), 15517 states have internal predecessors, (67876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:46:56,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15518 states to 15518 states and 67876 transitions. [2021-06-05 22:46:56,819 INFO L78 Accepts]: Start accepts. Automaton has 15518 states and 67876 transitions. Word has length 32 [2021-06-05 22:46:56,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:46:56,820 INFO L482 AbstractCegarLoop]: Abstraction has 15518 states and 67876 transitions. [2021-06-05 22:46:56,820 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 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 22:46:56,820 INFO L276 IsEmpty]: Start isEmpty. Operand 15518 states and 67876 transitions. [2021-06-05 22:46:56,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:46:56,850 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:46:56,850 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:46:57,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-05 22:46:57,052 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:46:57,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:46:57,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1459493096, now seen corresponding path program 10 times [2021-06-05 22:46:57,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:46:57,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005507992] [2021-06-05 22:46:57,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:46:57,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:46:57,101 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:46:57,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:46:57,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005507992] [2021-06-05 22:46:57,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005507992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:46:57,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014344354] [2021-06-05 22:46:57,102 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 22:46:57,130 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:46:57,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:46:57,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 22:46:57,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:46:57,228 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:46:57,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014344354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:46:57,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:46:57,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 22:46:57,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694948856] [2021-06-05 22:46:57,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:46:57,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:46:57,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:46:57,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:46:57,230 INFO L87 Difference]: Start difference. First operand 15518 states and 67876 transitions. Second operand has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 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 22:46:57,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:46:57,657 INFO L93 Difference]: Finished difference Result 25214 states and 104840 transitions. [2021-06-05 22:46:57,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:46:57,658 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 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 32 [2021-06-05 22:46:57,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:46:57,728 INFO L225 Difference]: With dead ends: 25214 [2021-06-05 22:46:57,728 INFO L226 Difference]: Without dead ends: 25094 [2021-06-05 22:46:57,729 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 258.9ms TimeCoverageRelationStatistics Valid=236, Invalid=576, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:46:57,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25094 states. [2021-06-05 22:46:58,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25094 to 16132. [2021-06-05 22:46:58,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16132 states, 16131 states have (on average 4.372140598846941) internal successors, (70527), 16131 states have internal predecessors, (70527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:46:58,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16132 states to 16132 states and 70527 transitions. [2021-06-05 22:46:58,205 INFO L78 Accepts]: Start accepts. Automaton has 16132 states and 70527 transitions. Word has length 32 [2021-06-05 22:46:58,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:46:58,206 INFO L482 AbstractCegarLoop]: Abstraction has 16132 states and 70527 transitions. [2021-06-05 22:46:58,206 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 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 22:46:58,206 INFO L276 IsEmpty]: Start isEmpty. Operand 16132 states and 70527 transitions. [2021-06-05 22:46:58,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 22:46:58,237 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:46:58,237 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:46:58,437 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:46:58,437 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:46:58,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:46:58,453 INFO L82 PathProgramCache]: Analyzing trace with hash -1954676526, now seen corresponding path program 11 times [2021-06-05 22:46:58,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:46:58,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174395157] [2021-06-05 22:46:58,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:46:58,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:46:58,517 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:46:58,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:46:58,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174395157] [2021-06-05 22:46:58,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174395157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:46:58,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700667013] [2021-06-05 22:46:58,517 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) [2021-06-05 22:46:58,558 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:46:58,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:46:58,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:46:58,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:46:58,672 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:46:58,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700667013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:46:58,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:46:58,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 11 [2021-06-05 22:46:58,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268815531] [2021-06-05 22:46:58,673 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:46:58,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:46:58,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:46:58,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:46:58,673 INFO L87 Difference]: Start difference. First operand 16132 states and 70527 transitions. Second operand has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 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 22:46:58,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:46:58,948 INFO L93 Difference]: Finished difference Result 30028 states and 127196 transitions. [2021-06-05 22:46:58,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:46:58,948 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 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 34 [2021-06-05 22:46:58,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:46:59,047 INFO L225 Difference]: With dead ends: 30028 [2021-06-05 22:46:59,048 INFO L226 Difference]: Without dead ends: 29440 [2021-06-05 22:46:59,048 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 63.5ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:46:59,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29440 states. [2021-06-05 22:46:59,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29440 to 21834. [2021-06-05 22:46:59,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21834 states, 21833 states have (on average 4.3858379517244535) internal successors, (95756), 21833 states have internal predecessors, (95756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:46:59,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21834 states to 21834 states and 95756 transitions. [2021-06-05 22:46:59,691 INFO L78 Accepts]: Start accepts. Automaton has 21834 states and 95756 transitions. Word has length 34 [2021-06-05 22:46:59,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:46:59,692 INFO L482 AbstractCegarLoop]: Abstraction has 21834 states and 95756 transitions. [2021-06-05 22:46:59,692 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 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 22:46:59,692 INFO L276 IsEmpty]: Start isEmpty. Operand 21834 states and 95756 transitions. [2021-06-05 22:46:59,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 22:46:59,737 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:46:59,738 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:46:59,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:46:59,941 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:46:59,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:46:59,941 INFO L82 PathProgramCache]: Analyzing trace with hash -554854418, now seen corresponding path program 12 times [2021-06-05 22:46:59,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:46:59,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998684821] [2021-06-05 22:46:59,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:46:59,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:46:59,987 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 22:46:59,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:46:59,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998684821] [2021-06-05 22:46:59,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998684821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:46:59,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178186674] [2021-06-05 22:46:59,987 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 22:47:00,025 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:47:00,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:47:00,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:47:00,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:47:00,132 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:47:00,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178186674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:47:00,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:47:00,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 11 [2021-06-05 22:47:00,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710193741] [2021-06-05 22:47:00,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:47:00,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:47:00,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:47:00,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:47:00,134 INFO L87 Difference]: Start difference. First operand 21834 states and 95756 transitions. Second operand has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 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 22:47:00,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:47:00,577 INFO L93 Difference]: Finished difference Result 60940 states and 262767 transitions. [2021-06-05 22:47:00,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:47:00,577 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 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 34 [2021-06-05 22:47:00,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:47:00,775 INFO L225 Difference]: With dead ends: 60940 [2021-06-05 22:47:00,775 INFO L226 Difference]: Without dead ends: 58958 [2021-06-05 22:47:00,775 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 74.5ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:47:00,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58958 states. [2021-06-05 22:47:01,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58958 to 39850. [2021-06-05 22:47:01,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39850 states, 39849 states have (on average 4.48199452934829) internal successors, (178603), 39849 states have internal predecessors, (178603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:47:01,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39850 states to 39850 states and 178603 transitions. [2021-06-05 22:47:01,977 INFO L78 Accepts]: Start accepts. Automaton has 39850 states and 178603 transitions. Word has length 34 [2021-06-05 22:47:01,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:47:01,977 INFO L482 AbstractCegarLoop]: Abstraction has 39850 states and 178603 transitions. [2021-06-05 22:47:01,977 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 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 22:47:01,978 INFO L276 IsEmpty]: Start isEmpty. Operand 39850 states and 178603 transitions. [2021-06-05 22:47:02,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 22:47:02,067 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:47:02,067 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:47:02,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-05 22:47:02,281 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:47:02,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:47:02,281 INFO L82 PathProgramCache]: Analyzing trace with hash -403396494, now seen corresponding path program 13 times [2021-06-05 22:47:02,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:47:02,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427472505] [2021-06-05 22:47:02,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:47:02,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:47:02,326 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 22:47:02,326 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:47:02,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427472505] [2021-06-05 22:47:02,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427472505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:47:02,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107172145] [2021-06-05 22:47:02,326 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 22:47:02,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:47:02,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:47:02,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:47:02,452 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:47:02,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107172145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:47:02,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:47:02,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 11 [2021-06-05 22:47:02,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189765908] [2021-06-05 22:47:02,453 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:47:02,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:47:02,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:47:02,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:47:02,454 INFO L87 Difference]: Start difference. First operand 39850 states and 178603 transitions. Second operand has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 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 22:47:02,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:47:02,855 INFO L93 Difference]: Finished difference Result 60941 states and 268418 transitions. [2021-06-05 22:47:02,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:47:02,855 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 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 34 [2021-06-05 22:47:02,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:47:03,065 INFO L225 Difference]: With dead ends: 60941 [2021-06-05 22:47:03,065 INFO L226 Difference]: Without dead ends: 60279 [2021-06-05 22:47:03,065 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 59.1ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:47:03,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60279 states. [2021-06-05 22:47:04,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60279 to 54948. [2021-06-05 22:47:04,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54948 states, 54947 states have (on average 4.507143247129052) internal successors, (247654), 54947 states have internal predecessors, (247654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:47:05,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54948 states to 54948 states and 247654 transitions. [2021-06-05 22:47:05,248 INFO L78 Accepts]: Start accepts. Automaton has 54948 states and 247654 transitions. Word has length 34 [2021-06-05 22:47:05,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:47:05,248 INFO L482 AbstractCegarLoop]: Abstraction has 54948 states and 247654 transitions. [2021-06-05 22:47:05,248 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 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 22:47:05,248 INFO L276 IsEmpty]: Start isEmpty. Operand 54948 states and 247654 transitions. [2021-06-05 22:47:05,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 22:47:05,426 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:47:05,426 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:47:05,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:47:05,627 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:47:05,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:47:05,628 INFO L82 PathProgramCache]: Analyzing trace with hash -1571777584, now seen corresponding path program 14 times [2021-06-05 22:47:05,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:47:05,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114556096] [2021-06-05 22:47:05,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:47:05,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:47:05,700 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:47:05,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:47:05,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114556096] [2021-06-05 22:47:05,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114556096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:47:05,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402846594] [2021-06-05 22:47:05,701 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 22:47:05,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:47:05,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:47:05,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 22:47:05,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:47:05,883 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:47:05,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402846594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:47:05,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:47:05,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-05 22:47:05,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51760826] [2021-06-05 22:47:05,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:47:05,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:47:05,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:47:05,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:47:05,884 INFO L87 Difference]: Start difference. First operand 54948 states and 247654 transitions. Second operand has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 17 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 22:47:07,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:47:07,186 INFO L93 Difference]: Finished difference Result 115835 states and 498368 transitions. [2021-06-05 22:47:07,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:47:07,186 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 17 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 36 [2021-06-05 22:47:07,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:47:07,857 INFO L225 Difference]: With dead ends: 115835 [2021-06-05 22:47:07,858 INFO L226 Difference]: Without dead ends: 115835 [2021-06-05 22:47:07,859 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 385.2ms TimeCoverageRelationStatistics Valid=402, Invalid=1080, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 22:47:07,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115835 states. [2021-06-05 22:47:09,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115835 to 56994. [2021-06-05 22:47:09,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56994 states, 56993 states have (on average 4.487621286824698) internal successors, (255763), 56993 states have internal predecessors, (255763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:47:10,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56994 states to 56994 states and 255763 transitions. [2021-06-05 22:47:10,426 INFO L78 Accepts]: Start accepts. Automaton has 56994 states and 255763 transitions. Word has length 36 [2021-06-05 22:47:10,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:47:10,426 INFO L482 AbstractCegarLoop]: Abstraction has 56994 states and 255763 transitions. [2021-06-05 22:47:10,426 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 17 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 22:47:10,426 INFO L276 IsEmpty]: Start isEmpty. Operand 56994 states and 255763 transitions. [2021-06-05 22:47:10,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 22:47:10,589 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:47:10,589 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:47:10,790 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-05 22:47:10,790 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:47:10,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:47:10,790 INFO L82 PathProgramCache]: Analyzing trace with hash -574261100, now seen corresponding path program 15 times [2021-06-05 22:47:10,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:47:10,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148687544] [2021-06-05 22:47:10,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:47:10,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:47:10,849 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:47:10,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:47:10,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148687544] [2021-06-05 22:47:10,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148687544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:47:10,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377512663] [2021-06-05 22:47:10,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:47:10,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:47:10,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:47:10,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 22:47:10,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:47:10,998 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:47:10,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377512663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:47:10,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:47:10,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 22:47:10,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584784175] [2021-06-05 22:47:10,999 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:47:10,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:47:10,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:47:10,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:47:10,999 INFO L87 Difference]: Start difference. First operand 56994 states and 255763 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 22:47:12,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:47:12,520 INFO L93 Difference]: Finished difference Result 148781 states and 646238 transitions. [2021-06-05 22:47:12,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 22:47:12,521 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 36 [2021-06-05 22:47:12,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:47:13,422 INFO L225 Difference]: With dead ends: 148781 [2021-06-05 22:47:13,423 INFO L226 Difference]: Without dead ends: 147463 [2021-06-05 22:47:13,423 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 472.5ms TimeCoverageRelationStatistics Valid=449, Invalid=1357, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 22:47:13,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147463 states. [2021-06-05 22:47:16,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147463 to 80557. [2021-06-05 22:47:16,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80557 states, 80556 states have (on average 4.52723571180297) internal successors, (364696), 80556 states have internal predecessors, (364696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:47:17,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80557 states to 80557 states and 364696 transitions. [2021-06-05 22:47:17,160 INFO L78 Accepts]: Start accepts. Automaton has 80557 states and 364696 transitions. Word has length 36 [2021-06-05 22:47:17,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:47:17,160 INFO L482 AbstractCegarLoop]: Abstraction has 80557 states and 364696 transitions. [2021-06-05 22:47:17,160 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 22:47:17,160 INFO L276 IsEmpty]: Start isEmpty. Operand 80557 states and 364696 transitions. [2021-06-05 22:47:17,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 22:47:17,408 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:47:17,408 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:47:17,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:47:17,609 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:47:17,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:47:17,609 INFO L82 PathProgramCache]: Analyzing trace with hash -1053355276, now seen corresponding path program 16 times [2021-06-05 22:47:17,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:47:17,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656410333] [2021-06-05 22:47:17,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:47:17,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:47:17,648 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:47:17,648 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:47:17,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656410333] [2021-06-05 22:47:17,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656410333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:47:17,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243865240] [2021-06-05 22:47:17,648 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:47:17,675 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:47:17,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:47:17,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 22:47:17,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:47:17,794 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:47:17,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243865240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:47:17,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:47:17,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-06-05 22:47:17,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472684597] [2021-06-05 22:47:17,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:47:17,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:47:17,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:47:17,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:47:17,795 INFO L87 Difference]: Start difference. First operand 80557 states and 364696 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 22:47:19,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:47:19,552 INFO L93 Difference]: Finished difference Result 170107 states and 749961 transitions. [2021-06-05 22:47:19,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 22:47:19,552 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 36 [2021-06-05 22:47:19,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:47:20,639 INFO L225 Difference]: With dead ends: 170107 [2021-06-05 22:47:20,639 INFO L226 Difference]: Without dead ends: 170087 [2021-06-05 22:47:20,639 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 381.0ms TimeCoverageRelationStatistics Valid=387, Invalid=945, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:47:20,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170087 states. [2021-06-05 22:47:24,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170087 to 102149. [2021-06-05 22:47:24,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102149 states, 102148 states have (on average 4.5491933273289735) internal successors, (464691), 102148 states have internal predecessors, (464691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:47:25,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102149 states to 102149 states and 464691 transitions. [2021-06-05 22:47:25,371 INFO L78 Accepts]: Start accepts. Automaton has 102149 states and 464691 transitions. Word has length 36 [2021-06-05 22:47:25,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:47:25,371 INFO L482 AbstractCegarLoop]: Abstraction has 102149 states and 464691 transitions. [2021-06-05 22:47:25,371 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 22:47:25,371 INFO L276 IsEmpty]: Start isEmpty. Operand 102149 states and 464691 transitions. [2021-06-05 22:47:25,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 22:47:25,605 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:47:25,606 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:47:25,806 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-05 22:47:25,806 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:47:25,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:47:25,806 INFO L82 PathProgramCache]: Analyzing trace with hash -405452624, now seen corresponding path program 17 times [2021-06-05 22:47:25,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:47:25,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901676413] [2021-06-05 22:47:25,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:47:25,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:47:25,842 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:47:25,842 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:47:25,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901676413] [2021-06-05 22:47:25,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901676413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:47:25,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678974470] [2021-06-05 22:47:25,842 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:47:25,874 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 22:47:25,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:47:25,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 22:47:25,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:47:25,987 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:47:25,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678974470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:47:25,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:47:25,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-06-05 22:47:25,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214909637] [2021-06-05 22:47:25,988 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:47:25,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:47:25,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:47:25,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:47:25,988 INFO L87 Difference]: Start difference. First operand 102149 states and 464691 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 22:47:27,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:47:27,593 INFO L93 Difference]: Finished difference Result 140554 states and 618093 transitions. [2021-06-05 22:47:27,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:47:27,593 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 36 [2021-06-05 22:47:27,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:47:28,164 INFO L225 Difference]: With dead ends: 140554 [2021-06-05 22:47:28,165 INFO L226 Difference]: Without dead ends: 140250 [2021-06-05 22:47:28,165 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 343.8ms TimeCoverageRelationStatistics Valid=356, Invalid=976, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:47:28,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140250 states. [2021-06-05 22:47:31,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140250 to 98725. [2021-06-05 22:47:31,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98725 states, 98724 states have (on average 4.555366476236781) internal successors, (449724), 98724 states have internal predecessors, (449724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:47:31,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98725 states to 98725 states and 449724 transitions. [2021-06-05 22:47:31,972 INFO L78 Accepts]: Start accepts. Automaton has 98725 states and 449724 transitions. Word has length 36 [2021-06-05 22:47:31,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:47:31,972 INFO L482 AbstractCegarLoop]: Abstraction has 98725 states and 449724 transitions. [2021-06-05 22:47:31,972 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 22:47:31,972 INFO L276 IsEmpty]: Start isEmpty. Operand 98725 states and 449724 transitions. [2021-06-05 22:47:32,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 22:47:32,155 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:47:32,155 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:47:32,355 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-05 22:47:32,355 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:47:32,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:47:32,356 INFO L82 PathProgramCache]: Analyzing trace with hash 1930458894, now seen corresponding path program 18 times [2021-06-05 22:47:32,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:47:32,356 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878280770] [2021-06-05 22:47:32,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:47:32,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:47:32,396 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:47:32,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:47:32,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878280770] [2021-06-05 22:47:32,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878280770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:47:32,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029778398] [2021-06-05 22:47:32,397 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:47:32,423 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:47:32,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:47:32,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 22:47:32,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:47:32,964 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:47:32,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029778398] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:47:32,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:47:32,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-06-05 22:47:32,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065263492] [2021-06-05 22:47:32,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:47:32,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:47:32,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:47:32,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:47:32,965 INFO L87 Difference]: Start difference. First operand 98725 states and 449724 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 22:47:34,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:47:34,655 INFO L93 Difference]: Finished difference Result 157433 states and 697584 transitions. [2021-06-05 22:47:34,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:47:34,657 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 36 [2021-06-05 22:47:34,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:47:35,205 INFO L225 Difference]: With dead ends: 157433 [2021-06-05 22:47:35,205 INFO L226 Difference]: Without dead ends: 156538 [2021-06-05 22:47:35,205 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 651.7ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:47:35,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156538 states. [2021-06-05 22:47:38,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156538 to 110101. [2021-06-05 22:47:38,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110101 states, 110100 states have (on average 4.5832970027247955) internal successors, (504621), 110100 states have internal predecessors, (504621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:47:39,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110101 states to 110101 states and 504621 transitions. [2021-06-05 22:47:39,445 INFO L78 Accepts]: Start accepts. Automaton has 110101 states and 504621 transitions. Word has length 36 [2021-06-05 22:47:39,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:47:39,445 INFO L482 AbstractCegarLoop]: Abstraction has 110101 states and 504621 transitions. [2021-06-05 22:47:39,445 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 22:47:39,445 INFO L276 IsEmpty]: Start isEmpty. Operand 110101 states and 504621 transitions. [2021-06-05 22:47:39,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 22:47:39,652 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:47:39,652 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:47:39,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-05 22:47:39,861 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:47:39,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:47:39,861 INFO L82 PathProgramCache]: Analyzing trace with hash -564059436, now seen corresponding path program 19 times [2021-06-05 22:47:39,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:47:39,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031743478] [2021-06-05 22:47:39,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:47:39,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:47:39,900 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:47:39,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:47:39,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031743478] [2021-06-05 22:47:39,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031743478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:47:39,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430440438] [2021-06-05 22:47:39,900 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:47:39,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:47:39,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 22:47:39,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:47:40,393 WARN L205 SmtUtils]: Spent 441.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2021-06-05 22:47:40,504 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:47:40,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430440438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:47:40,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:47:40,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-06-05 22:47:40,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125571487] [2021-06-05 22:47:40,504 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:47:40,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:47:40,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:47:40,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:47:40,505 INFO L87 Difference]: Start difference. First operand 110101 states and 504621 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 22:47:42,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:47:42,336 INFO L93 Difference]: Finished difference Result 192417 states and 850027 transitions. [2021-06-05 22:47:42,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 22:47:42,337 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 36 [2021-06-05 22:47:42,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:47:43,044 INFO L225 Difference]: With dead ends: 192417 [2021-06-05 22:47:43,045 INFO L226 Difference]: Without dead ends: 191725 [2021-06-05 22:47:43,045 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 391.4ms TimeCoverageRelationStatistics Valid=421, Invalid=1219, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 22:47:43,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191725 states. [2021-06-05 22:47:47,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191725 to 118442. [2021-06-05 22:47:47,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118442 states, 118441 states have (on average 4.604208002296502) internal successors, (545327), 118441 states have internal predecessors, (545327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:47:48,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118442 states to 118442 states and 545327 transitions. [2021-06-05 22:47:48,285 INFO L78 Accepts]: Start accepts. Automaton has 118442 states and 545327 transitions. Word has length 36 [2021-06-05 22:47:48,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:47:48,285 INFO L482 AbstractCegarLoop]: Abstraction has 118442 states and 545327 transitions. [2021-06-05 22:47:48,285 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 22:47:48,285 INFO L276 IsEmpty]: Start isEmpty. Operand 118442 states and 545327 transitions. [2021-06-05 22:47:48,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 22:47:48,489 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:47:48,489 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:47:48,705 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-06-05 22:47:48,705 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:47:48,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:47:48,706 INFO L82 PathProgramCache]: Analyzing trace with hash -689678634, now seen corresponding path program 20 times [2021-06-05 22:47:48,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:47:48,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102090633] [2021-06-05 22:47:48,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:47:48,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:47:48,756 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:47:48,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:47:48,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102090633] [2021-06-05 22:47:48,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102090633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:47:48,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637345860] [2021-06-05 22:47:48,757 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 22:47:48,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:47:48,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:47:48,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 22:47:48,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:47:48,904 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:47:48,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637345860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:47:48,905 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:47:48,905 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 22:47:48,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509504417] [2021-06-05 22:47:48,905 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:47:48,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:47:48,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:47:48,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:47:48,905 INFO L87 Difference]: Start difference. First operand 118442 states and 545327 transitions. Second operand has 17 states, 17 states have (on average 3.588235294117647) internal successors, (61), 16 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 22:47:50,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:47:50,965 INFO L93 Difference]: Finished difference Result 221192 states and 968042 transitions. [2021-06-05 22:47:50,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:47:50,965 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.588235294117647) internal successors, (61), 16 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 36 [2021-06-05 22:47:50,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:47:52,367 INFO L225 Difference]: With dead ends: 221192 [2021-06-05 22:47:52,368 INFO L226 Difference]: Without dead ends: 221192 [2021-06-05 22:47:52,368 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 352.7ms TimeCoverageRelationStatistics Valid=414, Invalid=1068, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 22:47:52,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221192 states. [2021-06-05 22:47:56,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221192 to 115584. [2021-06-05 22:47:56,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115584 states, 115583 states have (on average 4.562331830805569) internal successors, (527328), 115583 states have internal predecessors, (527328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:47:57,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115584 states to 115584 states and 527328 transitions. [2021-06-05 22:47:57,466 INFO L78 Accepts]: Start accepts. Automaton has 115584 states and 527328 transitions. Word has length 36 [2021-06-05 22:47:57,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:47:57,466 INFO L482 AbstractCegarLoop]: Abstraction has 115584 states and 527328 transitions. [2021-06-05 22:47:57,466 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.588235294117647) internal successors, (61), 16 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 22:47:57,466 INFO L276 IsEmpty]: Start isEmpty. Operand 115584 states and 527328 transitions. [2021-06-05 22:47:58,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 22:47:58,291 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:47:58,291 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:47:58,491 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-05 22:47:58,491 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:47:58,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:47:58,492 INFO L82 PathProgramCache]: Analyzing trace with hash -26712938, now seen corresponding path program 21 times [2021-06-05 22:47:58,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:47:58,492 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227339680] [2021-06-05 22:47:58,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:47:58,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:47:58,543 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:47:58,543 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:47:58,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227339680] [2021-06-05 22:47:58,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227339680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:47:58,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630339809] [2021-06-05 22:47:58,543 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 22:47:58,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:47:58,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:47:58,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 22:47:58,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:47:58,687 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:47:58,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630339809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:47:58,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:47:58,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-06-05 22:47:58,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485255454] [2021-06-05 22:47:58,688 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:47:58,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:47:58,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:47:58,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:47:58,689 INFO L87 Difference]: Start difference. First operand 115584 states and 527328 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 22:48:00,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:48:00,393 INFO L93 Difference]: Finished difference Result 149434 states and 659887 transitions. [2021-06-05 22:48:00,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 22:48:00,394 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 36 [2021-06-05 22:48:00,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:48:00,975 INFO L225 Difference]: With dead ends: 149434 [2021-06-05 22:48:00,976 INFO L226 Difference]: Without dead ends: 149030 [2021-06-05 22:48:00,976 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 345.9ms TimeCoverageRelationStatistics Valid=318, Invalid=1014, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:48:01,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149030 states. [2021-06-05 22:48:04,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149030 to 114434. [2021-06-05 22:48:04,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114434 states, 114433 states have (on average 4.564548687878497) internal successors, (522335), 114433 states have internal predecessors, (522335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:48:05,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114434 states to 114434 states and 522335 transitions. [2021-06-05 22:48:05,522 INFO L78 Accepts]: Start accepts. Automaton has 114434 states and 522335 transitions. Word has length 36 [2021-06-05 22:48:05,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:48:05,522 INFO L482 AbstractCegarLoop]: Abstraction has 114434 states and 522335 transitions. [2021-06-05 22:48:05,522 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 22:48:05,522 INFO L276 IsEmpty]: Start isEmpty. Operand 114434 states and 522335 transitions. [2021-06-05 22:48:05,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 22:48:05,721 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:48:05,721 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:48:05,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:48:05,925 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:48:05,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:48:05,925 INFO L82 PathProgramCache]: Analyzing trace with hash -498320652, now seen corresponding path program 22 times [2021-06-05 22:48:05,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:48:05,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422177267] [2021-06-05 22:48:05,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:48:05,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:48:05,969 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:48:05,969 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:48:05,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422177267] [2021-06-05 22:48:05,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422177267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:48:05,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42060447] [2021-06-05 22:48:05,969 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 22:48:06,002 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:48:06,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:48:06,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 22:48:06,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:48:06,106 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:48:06,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42060447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:48:06,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:48:06,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-06-05 22:48:06,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281253334] [2021-06-05 22:48:06,107 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:48:06,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:48:06,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:48:06,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:48:06,107 INFO L87 Difference]: Start difference. First operand 114434 states and 522335 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 22:48:08,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:48:08,970 INFO L93 Difference]: Finished difference Result 262218 states and 1170693 transitions. [2021-06-05 22:48:08,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 22:48:08,989 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 36 [2021-06-05 22:48:08,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:48:10,099 INFO L225 Difference]: With dead ends: 262218 [2021-06-05 22:48:10,099 INFO L226 Difference]: Without dead ends: 262218 [2021-06-05 22:48:10,100 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 426.0ms TimeCoverageRelationStatistics Valid=520, Invalid=1202, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 22:48:10,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262218 states. [2021-06-05 22:48:16,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262218 to 187390. [2021-06-05 22:48:16,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187390 states, 187389 states have (on average 4.617053295550966) internal successors, (865185), 187389 states have internal predecessors, (865185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:48:17,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187390 states to 187390 states and 865185 transitions. [2021-06-05 22:48:17,688 INFO L78 Accepts]: Start accepts. Automaton has 187390 states and 865185 transitions. Word has length 36 [2021-06-05 22:48:17,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:48:17,688 INFO L482 AbstractCegarLoop]: Abstraction has 187390 states and 865185 transitions. [2021-06-05 22:48:17,688 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 22:48:17,688 INFO L276 IsEmpty]: Start isEmpty. Operand 187390 states and 865185 transitions. [2021-06-05 22:48:17,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 22:48:17,987 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:48:17,987 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:48:18,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-06-05 22:48:18,188 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:48:18,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:48:18,189 INFO L82 PathProgramCache]: Analyzing trace with hash 2046213610, now seen corresponding path program 23 times [2021-06-05 22:48:18,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:48:18,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950263304] [2021-06-05 22:48:18,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:48:18,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:48:18,239 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:48:18,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:48:18,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950263304] [2021-06-05 22:48:18,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950263304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:48:18,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396880440] [2021-06-05 22:48:18,240 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 22:48:18,276 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:48:18,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:48:18,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 22:48:18,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:48:19,063 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:48:19,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396880440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:48:19,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:48:19,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-06-05 22:48:19,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439382509] [2021-06-05 22:48:19,064 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:48:19,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:48:19,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:48:19,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:48:19,065 INFO L87 Difference]: Start difference. First operand 187390 states and 865185 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 22:48:21,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:48:21,222 INFO L93 Difference]: Finished difference Result 254683 states and 1137807 transitions. [2021-06-05 22:48:21,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:48:21,222 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 36 [2021-06-05 22:48:21,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:48:22,182 INFO L225 Difference]: With dead ends: 254683 [2021-06-05 22:48:22,182 INFO L226 Difference]: Without dead ends: 254373 [2021-06-05 22:48:22,183 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 289.4ms TimeCoverageRelationStatistics Valid=342, Invalid=848, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:48:22,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254373 states. [2021-06-05 22:48:28,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254373 to 187000. [2021-06-05 22:48:28,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187000 states, 186999 states have (on average 4.611853539323739) internal successors, (862412), 186999 states have internal predecessors, (862412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:48:29,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187000 states to 187000 states and 862412 transitions. [2021-06-05 22:48:29,407 INFO L78 Accepts]: Start accepts. Automaton has 187000 states and 862412 transitions. Word has length 36 [2021-06-05 22:48:29,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:48:29,407 INFO L482 AbstractCegarLoop]: Abstraction has 187000 states and 862412 transitions. [2021-06-05 22:48:29,407 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 22:48:29,408 INFO L276 IsEmpty]: Start isEmpty. Operand 187000 states and 862412 transitions. [2021-06-05 22:48:30,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 22:48:30,385 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:48:30,385 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:48:30,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:48:30,601 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:48:30,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:48:30,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1041882536, now seen corresponding path program 24 times [2021-06-05 22:48:30,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:48:30,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324842762] [2021-06-05 22:48:30,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:48:30,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:48:30,641 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:48:30,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:48:30,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324842762] [2021-06-05 22:48:30,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324842762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:48:30,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422492823] [2021-06-05 22:48:30,641 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:48:30,671 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:48:30,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:48:30,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 22:48:30,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:48:30,777 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:48:30,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422492823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:48:30,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:48:30,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-06-05 22:48:30,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224097950] [2021-06-05 22:48:30,777 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:48:30,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:48:30,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:48:30,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:48:30,778 INFO L87 Difference]: Start difference. First operand 187000 states and 862412 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 22:48:33,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:48:33,240 INFO L93 Difference]: Finished difference Result 283294 states and 1263502 transitions. [2021-06-05 22:48:33,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:48:33,241 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 36 [2021-06-05 22:48:33,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:48:34,955 INFO L225 Difference]: With dead ends: 283294 [2021-06-05 22:48:34,955 INFO L226 Difference]: Without dead ends: 282784 [2021-06-05 22:48:34,956 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 347.3ms TimeCoverageRelationStatistics Valid=404, Invalid=1078, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 22:48:35,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282784 states. [2021-06-05 22:48:41,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282784 to 207055. [2021-06-05 22:48:42,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207055 states, 207054 states have (on average 4.6254455359471445) internal successors, (957717), 207054 states have internal predecessors, (957717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:48:43,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207055 states to 207055 states and 957717 transitions. [2021-06-05 22:48:43,140 INFO L78 Accepts]: Start accepts. Automaton has 207055 states and 957717 transitions. Word has length 36 [2021-06-05 22:48:43,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:48:43,140 INFO L482 AbstractCegarLoop]: Abstraction has 207055 states and 957717 transitions. [2021-06-05 22:48:43,140 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 22:48:43,140 INFO L276 IsEmpty]: Start isEmpty. Operand 207055 states and 957717 transitions. [2021-06-05 22:48:44,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 22:48:44,026 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:48:44,026 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:48:44,241 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-06-05 22:48:44,241 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:48:44,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:48:44,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1862781996, now seen corresponding path program 25 times [2021-06-05 22:48:44,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:48:44,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167943816] [2021-06-05 22:48:44,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:48:44,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:48:44,293 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:48:44,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:48:44,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167943816] [2021-06-05 22:48:44,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167943816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:48:44,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404872077] [2021-06-05 22:48:44,293 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:48:44,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:48:44,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 22:48:44,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:48:44,435 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:48:44,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404872077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:48:44,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:48:44,436 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 22:48:44,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69861895] [2021-06-05 22:48:44,437 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:48:44,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:48:44,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:48:44,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:48:44,437 INFO L87 Difference]: Start difference. First operand 207055 states and 957717 transitions. Second operand has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 16 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 22:48:46,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:48:46,909 INFO L93 Difference]: Finished difference Result 290122 states and 1295399 transitions. [2021-06-05 22:48:46,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 22:48:46,909 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 16 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 36 [2021-06-05 22:48:46,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:48:48,675 INFO L225 Difference]: With dead ends: 290122 [2021-06-05 22:48:48,675 INFO L226 Difference]: Without dead ends: 289652 [2021-06-05 22:48:48,676 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 469.8ms TimeCoverageRelationStatistics Valid=575, Invalid=1587, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 22:48:49,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289652 states. [2021-06-05 22:48:55,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289652 to 218816. [2021-06-05 22:48:55,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218816 states, 218815 states have (on average 4.624737792198889) internal successors, (1011962), 218815 states have internal predecessors, (1011962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:48:57,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218816 states to 218816 states and 1011962 transitions. [2021-06-05 22:48:57,671 INFO L78 Accepts]: Start accepts. Automaton has 218816 states and 1011962 transitions. Word has length 36 [2021-06-05 22:48:57,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:48:57,671 INFO L482 AbstractCegarLoop]: Abstraction has 218816 states and 1011962 transitions. [2021-06-05 22:48:57,671 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 16 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 22:48:57,671 INFO L276 IsEmpty]: Start isEmpty. Operand 218816 states and 1011962 transitions. [2021-06-05 22:48:58,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 22:48:58,186 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:48:58,187 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:48:58,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-06-05 22:48:58,401 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:48:58,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:48:58,402 INFO L82 PathProgramCache]: Analyzing trace with hash -1975565294, now seen corresponding path program 26 times [2021-06-05 22:48:58,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:48:58,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850498249] [2021-06-05 22:48:58,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:48:58,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:48:58,513 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:48:58,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:48:58,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850498249] [2021-06-05 22:48:58,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850498249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:48:58,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513190520] [2021-06-05 22:48:58,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:48:58,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:48:58,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:48:58,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:48:58,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:48:58,751 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:48:58,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513190520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:48:58,752 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:48:58,752 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 14 [2021-06-05 22:48:58,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34179457] [2021-06-05 22:48:58,753 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:48:58,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:48:58,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:48:58,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:48:58,754 INFO L87 Difference]: Start difference. First operand 218816 states and 1011962 transitions. Second operand has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 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 22:49:02,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:49:02,061 INFO L93 Difference]: Finished difference Result 275767 states and 1260077 transitions. [2021-06-05 22:49:02,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:49:02,061 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 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 38 [2021-06-05 22:49:02,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:49:03,872 INFO L225 Difference]: With dead ends: 275767 [2021-06-05 22:49:03,872 INFO L226 Difference]: Without dead ends: 274998 [2021-06-05 22:49:03,873 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 131.1ms TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:49:04,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274998 states. [2021-06-05 22:49:10,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274998 to 238003. [2021-06-05 22:49:11,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238003 states, 238002 states have (on average 4.6232090486634565) internal successors, (1100333), 238002 states have internal predecessors, (1100333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:49:12,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238003 states to 238003 states and 1100333 transitions. [2021-06-05 22:49:12,845 INFO L78 Accepts]: Start accepts. Automaton has 238003 states and 1100333 transitions. Word has length 38 [2021-06-05 22:49:12,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:49:12,845 INFO L482 AbstractCegarLoop]: Abstraction has 238003 states and 1100333 transitions. [2021-06-05 22:49:12,845 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 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 22:49:12,846 INFO L276 IsEmpty]: Start isEmpty. Operand 238003 states and 1100333 transitions. [2021-06-05 22:49:13,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 22:49:13,254 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:49:13,254 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:49:13,454 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-05 22:49:13,455 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:49:13,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:49:13,455 INFO L82 PathProgramCache]: Analyzing trace with hash -1727044438, now seen corresponding path program 27 times [2021-06-05 22:49:13,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:49:13,455 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895216199] [2021-06-05 22:49:13,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:49:13,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:49:13,500 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 22:49:13,500 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:49:13,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895216199] [2021-06-05 22:49:13,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895216199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:49:13,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867909589] [2021-06-05 22:49:13,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:49:13,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 22:49:13,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:49:13,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:49:13,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:49:13,680 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:49:13,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867909589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:49:13,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:49:13,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 14 [2021-06-05 22:49:13,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931619473] [2021-06-05 22:49:13,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:49:13,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:49:13,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:49:13,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:49:13,682 INFO L87 Difference]: Start difference. First operand 238003 states and 1100333 transitions. Second operand has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 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 22:49:17,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:49:17,032 INFO L93 Difference]: Finished difference Result 394201 states and 1792824 transitions. [2021-06-05 22:49:17,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:49:17,033 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 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 38 [2021-06-05 22:49:17,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:49:19,326 INFO L225 Difference]: With dead ends: 394201 [2021-06-05 22:49:19,326 INFO L226 Difference]: Without dead ends: 392734 [2021-06-05 22:49:19,326 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 96.3ms TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:49:19,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392734 states. [2021-06-05 22:49:29,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392734 to 306278. [2021-06-05 22:49:30,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306278 states, 306277 states have (on average 4.624082121739471) internal successors, (1416250), 306277 states have internal predecessors, (1416250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:49:32,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306278 states to 306278 states and 1416250 transitions. [2021-06-05 22:49:32,274 INFO L78 Accepts]: Start accepts. Automaton has 306278 states and 1416250 transitions. Word has length 38 [2021-06-05 22:49:32,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:49:32,274 INFO L482 AbstractCegarLoop]: Abstraction has 306278 states and 1416250 transitions. [2021-06-05 22:49:32,274 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 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 22:49:32,274 INFO L276 IsEmpty]: Start isEmpty. Operand 306278 states and 1416250 transitions. [2021-06-05 22:49:33,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 22:49:33,412 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:49:33,412 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:49:33,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-05 22:49:33,624 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:49:33,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:49:33,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1495021836, now seen corresponding path program 1 times [2021-06-05 22:49:33,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:49:33,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493117383] [2021-06-05 22:49:33,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:49:33,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:49:33,678 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:49:33,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:49:33,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493117383] [2021-06-05 22:49:33,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493117383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:49:33,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167379260] [2021-06-05 22:49:33,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 22:49:33,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:49:33,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 22:49:33,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:49:33,818 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:49:33,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167379260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:49:33,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:49:33,819 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 15 [2021-06-05 22:49:33,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30814414] [2021-06-05 22:49:33,819 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:49:33,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:49:33,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:49:33,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:49:33,820 INFO L87 Difference]: Start difference. First operand 306278 states and 1416250 transitions. Second operand has 15 states, 15 states have (on average 4.866666666666666) 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 22:49:39,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:49:39,421 INFO L93 Difference]: Finished difference Result 586179 states and 2672233 transitions. [2021-06-05 22:49:39,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:49:39,422 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.866666666666666) 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 38 [2021-06-05 22:49:39,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:49:43,156 INFO L225 Difference]: With dead ends: 586179 [2021-06-05 22:49:43,157 INFO L226 Difference]: Without dead ends: 583951 [2021-06-05 22:49:43,157 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 102.4ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:49:44,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583951 states. [2021-06-05 22:49:58,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583951 to 425975. [2021-06-05 22:49:59,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425975 states, 425974 states have (on average 4.631465770211327) internal successors, (1972884), 425974 states have internal predecessors, (1972884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:50:02,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425975 states to 425975 states and 1972884 transitions. [2021-06-05 22:50:02,879 INFO L78 Accepts]: Start accepts. Automaton has 425975 states and 1972884 transitions. Word has length 38 [2021-06-05 22:50:02,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:50:02,879 INFO L482 AbstractCegarLoop]: Abstraction has 425975 states and 1972884 transitions. [2021-06-05 22:50:02,879 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.866666666666666) 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 22:50:02,879 INFO L276 IsEmpty]: Start isEmpty. Operand 425975 states and 1972884 transitions. [2021-06-05 22:50:03,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 22:50:03,740 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:50:03,740 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:50:03,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-05 22:50:03,940 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:50:03,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:50:03,941 INFO L82 PathProgramCache]: Analyzing trace with hash 616191154, now seen corresponding path program 28 times [2021-06-05 22:50:03,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:50:03,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967920915] [2021-06-05 22:50:03,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:50:03,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:50:03,994 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 22:50:03,994 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:50:03,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967920915] [2021-06-05 22:50:03,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967920915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:50:03,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107256072] [2021-06-05 22:50:03,994 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 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 22:50:04,029 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:50:04,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:50:04,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:50:04,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:50:04,717 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:50:04,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107256072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:50:04,717 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:50:04,717 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 14 [2021-06-05 22:50:04,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841216041] [2021-06-05 22:50:04,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:50:04,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:50:04,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:50:04,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:50:04,718 INFO L87 Difference]: Start difference. First operand 425975 states and 1972884 transitions. Second operand has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 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 22:50:09,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:50:09,574 INFO L93 Difference]: Finished difference Result 560533 states and 2590081 transitions. [2021-06-05 22:50:09,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:50:09,575 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 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 38 [2021-06-05 22:50:09,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:50:12,905 INFO L225 Difference]: With dead ends: 560533 [2021-06-05 22:50:12,905 INFO L226 Difference]: Without dead ends: 559708 [2021-06-05 22:50:12,905 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 96.1ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:50:14,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559708 states. [2021-06-05 22:50:31,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559708 to 545995. [2021-06-05 22:50:31,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 545995 states, 545994 states have (on average 4.646322120755905) internal successors, (2536864), 545994 states have internal predecessors, (2536864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:50:37,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545995 states to 545995 states and 2536864 transitions. [2021-06-05 22:50:37,774 INFO L78 Accepts]: Start accepts. Automaton has 545995 states and 2536864 transitions. Word has length 38 [2021-06-05 22:50:37,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:50:37,774 INFO L482 AbstractCegarLoop]: Abstraction has 545995 states and 2536864 transitions. [2021-06-05 22:50:37,774 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 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 22:50:37,774 INFO L276 IsEmpty]: Start isEmpty. Operand 545995 states and 2536864 transitions. [2021-06-05 22:50:40,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 22:50:40,372 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:50:40,372 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:50:40,586 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:50:40,586 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:50:40,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:50:40,586 INFO L82 PathProgramCache]: Analyzing trace with hash -9164784, now seen corresponding path program 29 times [2021-06-05 22:50:40,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:50:40,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680422699] [2021-06-05 22:50:40,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:50:40,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:50:40,696 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:50:40,696 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:50:40,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680422699] [2021-06-05 22:50:40,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680422699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:50:40,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426784003] [2021-06-05 22:50:40,696 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 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 22:50:40,791 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 22:50:40,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:50:40,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 22:50:40,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:50:40,960 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:50:40,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426784003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:50:40,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:50:40,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-06-05 22:50:40,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633948848] [2021-06-05 22:50:40,961 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:50:40,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:50:40,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:50:40,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:50:40,961 INFO L87 Difference]: Start difference. First operand 545995 states and 2536864 transitions. Second operand has 22 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 21 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 22:50:51,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:50:51,205 INFO L93 Difference]: Finished difference Result 810316 states and 3662784 transitions. [2021-06-05 22:50:51,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 22:50:51,206 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 21 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 40 [2021-06-05 22:50:51,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:50:59,163 INFO L225 Difference]: With dead ends: 810316 [2021-06-05 22:50:59,163 INFO L226 Difference]: Without dead ends: 810316 [2021-06-05 22:50:59,164 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 654.0ms TimeCoverageRelationStatistics Valid=757, Invalid=2105, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 22:51:00,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 810316 states. [2021-06-05 22:51:20,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 810316 to 534782. [2021-06-05 22:51:21,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 534782 states, 534781 states have (on average 4.638676392766385) internal successors, (2480676), 534781 states have internal predecessors, (2480676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:51:25,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534782 states to 534782 states and 2480676 transitions. [2021-06-05 22:51:25,502 INFO L78 Accepts]: Start accepts. Automaton has 534782 states and 2480676 transitions. Word has length 40 [2021-06-05 22:51:25,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:51:25,502 INFO L482 AbstractCegarLoop]: Abstraction has 534782 states and 2480676 transitions. [2021-06-05 22:51:25,502 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 21 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 22:51:25,502 INFO L276 IsEmpty]: Start isEmpty. Operand 534782 states and 2480676 transitions. [2021-06-05 22:51:27,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 22:51:27,151 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:51:27,151 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:51:27,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-05 22:51:27,353 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:51:27,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:51:27,353 INFO L82 PathProgramCache]: Analyzing trace with hash 826469332, now seen corresponding path program 30 times [2021-06-05 22:51:27,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:51:27,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036242380] [2021-06-05 22:51:27,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:51:27,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:51:27,410 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:51:27,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:51:27,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036242380] [2021-06-05 22:51:27,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036242380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:51:27,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193991880] [2021-06-05 22:51:27,410 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:51:27,440 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 22:51:27,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:51:27,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 22:51:27,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:51:27,600 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:51:27,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193991880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:51:27,600 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:51:27,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 22:51:27,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966067686] [2021-06-05 22:51:27,601 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:51:27,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:51:27,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:51:27,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:51:27,601 INFO L87 Difference]: Start difference. First operand 534782 states and 2480676 transitions. Second operand has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 20 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 22:51:41,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:51:41,969 INFO L93 Difference]: Finished difference Result 1136355 states and 5157666 transitions. [2021-06-05 22:51:41,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 22:51:41,969 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 20 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 40 [2021-06-05 22:51:41,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:51:48,196 INFO L225 Difference]: With dead ends: 1136355 [2021-06-05 22:51:48,196 INFO L226 Difference]: Without dead ends: 1133906 [2021-06-05 22:51:48,197 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1662 ImplicationChecksByTransitivity, 1060.3ms TimeCoverageRelationStatistics Valid=1280, Invalid=3976, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 22:51:50,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1133906 states. [2021-06-05 22:52:26,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1133906 to 706666. [2021-06-05 22:52:27,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 706666 states, 706665 states have (on average 4.660015707584216) internal successors, (3293070), 706665 states have internal predecessors, (3293070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:52:35,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706666 states to 706666 states and 3293070 transitions. [2021-06-05 22:52:35,214 INFO L78 Accepts]: Start accepts. Automaton has 706666 states and 3293070 transitions. Word has length 40 [2021-06-05 22:52:35,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:52:35,215 INFO L482 AbstractCegarLoop]: Abstraction has 706666 states and 3293070 transitions. [2021-06-05 22:52:35,215 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 20 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 22:52:35,215 INFO L276 IsEmpty]: Start isEmpty. Operand 706666 states and 3293070 transitions. [2021-06-05 22:52:37,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 22:52:37,528 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:52:37,528 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:52:37,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-05 22:52:37,741 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:52:37,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:52:37,741 INFO L82 PathProgramCache]: Analyzing trace with hash -686057356, now seen corresponding path program 31 times [2021-06-05 22:52:37,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:52:37,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220425956] [2021-06-05 22:52:37,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:52:37,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:52:37,803 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:52:37,803 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:52:37,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220425956] [2021-06-05 22:52:37,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220425956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:52:37,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215384050] [2021-06-05 22:52:37,803 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 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 22:52:37,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:52:37,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 22:52:37,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:52:37,986 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:52:37,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215384050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:52:37,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:52:37,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-06-05 22:52:37,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180601957] [2021-06-05 22:52:37,987 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:52:37,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:52:37,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:52:37,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:52:37,987 INFO L87 Difference]: Start difference. First operand 706666 states and 3293070 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 22:52:39,067 WARN L205 SmtUtils]: Spent 519.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 10