/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/mult-flipped-dist.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2abb09bbbae98a04ae2fcc735832bfdba44f6fbc-2abb09b [2021-06-05 21:13:20,745 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 21:13:20,746 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 21:13:20,766 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 21:13:20,809 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-05 21:13:20,837 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 21:13:20,837 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 21:13:20,837 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 21:13:20,837 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 21:13:20,839 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 21:13:20,839 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 21:13:20,839 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 21:13:20,839 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 21:13:20,839 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 21:13:20,839 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 21:13:20,840 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 21:13:20,840 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 21:13:20,840 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 21:13:20,840 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 21:13:20,840 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 21:13:20,840 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 21:13:20,841 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 21:13:20,841 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 21:13:20,841 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 21:13:20,841 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 21:13:20,841 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 21:13:20,841 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 21:13:20,841 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 21:13:20,841 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 21:13:20,841 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 21:13:20,841 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 21:13:20,841 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 21:13:20,842 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 21:13:20,842 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 21:13:20,842 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 21:13:20,842 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 21:13:20,842 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 21:13:21,073 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 21:13:21,085 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 21:13:21,087 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 21:13:21,088 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 21:13:21,089 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 21:13:21,089 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/mult-flipped-dist.wvr.bpl [2021-06-05 21:13:21,089 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/mult-flipped-dist.wvr.bpl' [2021-06-05 21:13:21,114 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 21:13:21,115 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 21:13:21,116 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 21:13:21,116 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 21:13:21,116 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 21:13:21,124 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "mult-flipped-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:13:21" (1/1) ... [2021-06-05 21:13:21,128 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "mult-flipped-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:13:21" (1/1) ... [2021-06-05 21:13:21,133 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 21:13:21,134 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 21:13:21,134 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 21:13:21,134 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 21:13:21,139 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "mult-flipped-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:13:21" (1/1) ... [2021-06-05 21:13:21,139 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "mult-flipped-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:13:21" (1/1) ... [2021-06-05 21:13:21,140 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "mult-flipped-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:13:21" (1/1) ... [2021-06-05 21:13:21,140 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "mult-flipped-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:13:21" (1/1) ... [2021-06-05 21:13:21,142 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "mult-flipped-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:13:21" (1/1) ... [2021-06-05 21:13:21,143 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "mult-flipped-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:13:21" (1/1) ... [2021-06-05 21:13:21,144 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "mult-flipped-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:13:21" (1/1) ... [2021-06-05 21:13:21,144 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 21:13:21,145 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 21:13:21,145 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 21:13:21,145 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 21:13:21,146 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "mult-flipped-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:13:21" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 21:13:21,200 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 21:13:21,200 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 21:13:21,200 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 21:13:21,200 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 21:13:21,201 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 21:13:21,201 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 21:13:21,201 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 21:13:21,201 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 21:13:21,201 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 21:13:21,201 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 21:13:21,201 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 21:13:21,201 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 21:13:21,202 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 21:13:21,364 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 21:13:21,365 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 21:13:21,366 INFO L202 PluginConnector]: Adding new model mult-flipped-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 09:13:21 BoogieIcfgContainer [2021-06-05 21:13:21,366 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 21:13:21,367 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 21:13:21,367 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 21:13:21,369 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 21:13:21,369 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mult-flipped-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:13:21" (1/2) ... [2021-06-05 21:13:21,370 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f88cbf0 and model type mult-flipped-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 09:13:21, skipping insertion in model container [2021-06-05 21:13:21,370 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mult-flipped-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 09:13:21" (2/2) ... [2021-06-05 21:13:21,371 INFO L111 eAbstractionObserver]: Analyzing ICFG mult-flipped-dist.wvr.bpl [2021-06-05 21:13:21,374 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 21:13:21,374 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 21:13:21,374 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 21:13:21,375 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 21:13:21,397 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-05 21:13:21,412 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-05 21:13:21,430 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 21:13:21,430 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 21:13:21,430 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 21:13:21,430 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 21:13:21,430 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 21:13:21,430 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 21:13:21,430 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 21:13:21,430 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-05 21:13:21,436 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 33 places, 26 transitions, 76 flow [2021-06-05 21:13:21,485 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 111 states, 109 states have (on average 2.853211009174312) internal successors, (311), 110 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:21,487 INFO L276 IsEmpty]: Start isEmpty. Operand has 111 states, 109 states have (on average 2.853211009174312) internal successors, (311), 110 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:21,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:13:21,493 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:21,493 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:21,494 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:21,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:21,506 INFO L82 PathProgramCache]: Analyzing trace with hash -1660799360, now seen corresponding path program 1 times [2021-06-05 21:13:21,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:21,511 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285827917] [2021-06-05 21:13:21,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:21,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:21,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:21,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:21,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285827917] [2021-06-05 21:13:21,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285827917] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:13:21,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:13:21,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 21:13:21,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585452538] [2021-06-05 21:13:21,706 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 21:13:21,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:21,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 21:13:21,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 21:13:21,721 INFO L87 Difference]: Start difference. First operand has 111 states, 109 states have (on average 2.853211009174312) internal successors, (311), 110 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:21,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:21,756 INFO L93 Difference]: Finished difference Result 214 states and 614 transitions. [2021-06-05 21:13:21,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 21:13:21,757 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:13:21,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:21,768 INFO L225 Difference]: With dead ends: 214 [2021-06-05 21:13:21,768 INFO L226 Difference]: Without dead ends: 199 [2021-06-05 21:13:21,769 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 21:13:21,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-06-05 21:13:21,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 146. [2021-06-05 21:13:21,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.8689655172413793) internal successors, (416), 145 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:21,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 416 transitions. [2021-06-05 21:13:21,814 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 416 transitions. Word has length 15 [2021-06-05 21:13:21,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:21,815 INFO L482 AbstractCegarLoop]: Abstraction has 146 states and 416 transitions. [2021-06-05 21:13:21,815 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:21,815 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 416 transitions. [2021-06-05 21:13:21,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:13:21,816 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:21,816 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:21,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 21:13:21,816 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:21,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:21,817 INFO L82 PathProgramCache]: Analyzing trace with hash 185723234, now seen corresponding path program 1 times [2021-06-05 21:13:21,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:21,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455458436] [2021-06-05 21:13:21,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:21,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:21,858 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:21,858 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:21,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455458436] [2021-06-05 21:13:21,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455458436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:21,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570990366] [2021-06-05 21:13:21,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:21,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:21,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 21:13:21,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:22,014 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:22,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570990366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:22,015 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:22,015 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-06-05 21:13:22,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280523091] [2021-06-05 21:13:22,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 21:13:22,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:22,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 21:13:22,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 21:13:22,019 INFO L87 Difference]: Start difference. First operand 146 states and 416 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:22,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:22,137 INFO L93 Difference]: Finished difference Result 336 states and 935 transitions. [2021-06-05 21:13:22,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 21:13:22,138 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:13:22,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:22,143 INFO L225 Difference]: With dead ends: 336 [2021-06-05 21:13:22,143 INFO L226 Difference]: Without dead ends: 336 [2021-06-05 21:13:22,144 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 30.0ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:13:22,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-06-05 21:13:22,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 178. [2021-06-05 21:13:22,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 3.0) internal successors, (531), 177 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:22,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 531 transitions. [2021-06-05 21:13:22,163 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 531 transitions. Word has length 17 [2021-06-05 21:13:22,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:22,164 INFO L482 AbstractCegarLoop]: Abstraction has 178 states and 531 transitions. [2021-06-05 21:13:22,164 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:22,164 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 531 transitions. [2021-06-05 21:13:22,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:13:22,165 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:22,165 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:22,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-06-05 21:13:22,377 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:22,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:22,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1698446180, now seen corresponding path program 1 times [2021-06-05 21:13:22,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:22,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378829802] [2021-06-05 21:13:22,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:22,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:22,411 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:22,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:22,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378829802] [2021-06-05 21:13:22,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378829802] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:13:22,411 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:13:22,411 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 21:13:22,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046972170] [2021-06-05 21:13:22,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 21:13:22,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:22,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 21:13:22,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 21:13:22,413 INFO L87 Difference]: Start difference. First operand 178 states and 531 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:22,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:22,448 INFO L93 Difference]: Finished difference Result 305 states and 846 transitions. [2021-06-05 21:13:22,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 21:13:22,450 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:13:22,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:22,452 INFO L225 Difference]: With dead ends: 305 [2021-06-05 21:13:22,452 INFO L226 Difference]: Without dead ends: 295 [2021-06-05 21:13:22,452 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 21:13:22,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2021-06-05 21:13:22,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 216. [2021-06-05 21:13:22,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.944186046511628) internal successors, (633), 215 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:22,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 633 transitions. [2021-06-05 21:13:22,466 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 633 transitions. Word has length 17 [2021-06-05 21:13:22,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:22,466 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 633 transitions. [2021-06-05 21:13:22,466 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:22,466 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 633 transitions. [2021-06-05 21:13:22,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:13:22,471 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:22,471 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:22,471 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 21:13:22,471 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:22,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:22,472 INFO L82 PathProgramCache]: Analyzing trace with hash 514397406, now seen corresponding path program 1 times [2021-06-05 21:13:22,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:22,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629244089] [2021-06-05 21:13:22,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:22,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:22,511 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:22,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:22,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629244089] [2021-06-05 21:13:22,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629244089] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:13:22,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:13:22,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 21:13:22,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101675597] [2021-06-05 21:13:22,512 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 21:13:22,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:22,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 21:13:22,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 21:13:22,513 INFO L87 Difference]: Start difference. First operand 216 states and 633 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:22,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:22,541 INFO L93 Difference]: Finished difference Result 301 states and 816 transitions. [2021-06-05 21:13:22,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 21:13:22,542 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:13:22,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:22,543 INFO L225 Difference]: With dead ends: 301 [2021-06-05 21:13:22,543 INFO L226 Difference]: Without dead ends: 286 [2021-06-05 21:13:22,544 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 21:13:22,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-06-05 21:13:22,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 233. [2021-06-05 21:13:22,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 2.8793103448275863) internal successors, (668), 232 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:22,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 668 transitions. [2021-06-05 21:13:22,553 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 668 transitions. Word has length 17 [2021-06-05 21:13:22,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:22,553 INFO L482 AbstractCegarLoop]: Abstraction has 233 states and 668 transitions. [2021-06-05 21:13:22,553 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:22,553 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 668 transitions. [2021-06-05 21:13:22,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:13:22,554 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:22,554 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:22,554 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 21:13:22,554 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:22,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:22,554 INFO L82 PathProgramCache]: Analyzing trace with hash 1421657056, now seen corresponding path program 2 times [2021-06-05 21:13:22,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:22,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171022483] [2021-06-05 21:13:22,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:22,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:22,575 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:22,576 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:22,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171022483] [2021-06-05 21:13:22,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171022483] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:13:22,576 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:13:22,576 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 21:13:22,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710074959] [2021-06-05 21:13:22,576 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 21:13:22,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:22,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 21:13:22,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 21:13:22,577 INFO L87 Difference]: Start difference. First operand 233 states and 668 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:22,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:22,594 INFO L93 Difference]: Finished difference Result 266 states and 732 transitions. [2021-06-05 21:13:22,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 21:13:22,594 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:13:22,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:22,595 INFO L225 Difference]: With dead ends: 266 [2021-06-05 21:13:22,595 INFO L226 Difference]: Without dead ends: 266 [2021-06-05 21:13:22,596 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 21:13:22,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-06-05 21:13:22,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 223. [2021-06-05 21:13:22,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 2.873873873873874) internal successors, (638), 222 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:22,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 638 transitions. [2021-06-05 21:13:22,603 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 638 transitions. Word has length 17 [2021-06-05 21:13:22,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:22,603 INFO L482 AbstractCegarLoop]: Abstraction has 223 states and 638 transitions. [2021-06-05 21:13:22,603 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:22,604 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 638 transitions. [2021-06-05 21:13:22,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:13:22,604 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:22,604 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:22,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 21:13:22,604 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:22,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:22,605 INFO L82 PathProgramCache]: Analyzing trace with hash -189703520, now seen corresponding path program 3 times [2021-06-05 21:13:22,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:22,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288984897] [2021-06-05 21:13:22,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:22,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:22,632 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:22,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:22,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288984897] [2021-06-05 21:13:22,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288984897] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:13:22,632 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:13:22,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 21:13:22,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917436105] [2021-06-05 21:13:22,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 21:13:22,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:22,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 21:13:22,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 21:13:22,634 INFO L87 Difference]: Start difference. First operand 223 states and 638 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:22,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:22,653 INFO L93 Difference]: Finished difference Result 282 states and 807 transitions. [2021-06-05 21:13:22,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 21:13:22,654 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:13:22,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:22,655 INFO L225 Difference]: With dead ends: 282 [2021-06-05 21:13:22,655 INFO L226 Difference]: Without dead ends: 282 [2021-06-05 21:13:22,655 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.0ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 21:13:22,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-06-05 21:13:22,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 236. [2021-06-05 21:13:22,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 2.9063829787234043) internal successors, (683), 235 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:22,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 683 transitions. [2021-06-05 21:13:22,663 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 683 transitions. Word has length 17 [2021-06-05 21:13:22,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:22,663 INFO L482 AbstractCegarLoop]: Abstraction has 236 states and 683 transitions. [2021-06-05 21:13:22,663 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:22,663 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 683 transitions. [2021-06-05 21:13:22,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:13:22,664 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:22,664 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:22,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-05 21:13:22,664 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:22,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:22,664 INFO L82 PathProgramCache]: Analyzing trace with hash -142653028, now seen corresponding path program 4 times [2021-06-05 21:13:22,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:22,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895043903] [2021-06-05 21:13:22,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:22,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:22,685 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:22,685 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:22,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895043903] [2021-06-05 21:13:22,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895043903] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:13:22,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:13:22,686 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 21:13:22,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276270027] [2021-06-05 21:13:22,686 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 21:13:22,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:22,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 21:13:22,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 21:13:22,687 INFO L87 Difference]: Start difference. First operand 236 states and 683 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:22,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:22,716 INFO L93 Difference]: Finished difference Result 280 states and 771 transitions. [2021-06-05 21:13:22,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 21:13:22,717 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:13:22,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:22,718 INFO L225 Difference]: With dead ends: 280 [2021-06-05 21:13:22,718 INFO L226 Difference]: Without dead ends: 266 [2021-06-05 21:13:22,718 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 8.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 21:13:22,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-06-05 21:13:22,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 216. [2021-06-05 21:13:22,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.9069767441860463) internal successors, (625), 215 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:22,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 625 transitions. [2021-06-05 21:13:22,724 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 625 transitions. Word has length 17 [2021-06-05 21:13:22,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:22,724 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 625 transitions. [2021-06-05 21:13:22,724 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:22,724 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 625 transitions. [2021-06-05 21:13:22,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:13:22,725 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:22,725 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:22,725 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-05 21:13:22,725 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:22,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:22,726 INFO L82 PathProgramCache]: Analyzing trace with hash -768893542, now seen corresponding path program 2 times [2021-06-05 21:13:22,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:22,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142393457] [2021-06-05 21:13:22,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:22,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:22,753 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:22,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:22,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142393457] [2021-06-05 21:13:22,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142393457] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:13:22,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:13:22,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 21:13:22,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372511689] [2021-06-05 21:13:22,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 21:13:22,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:22,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 21:13:22,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 21:13:22,755 INFO L87 Difference]: Start difference. First operand 216 states and 625 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:22,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:22,780 INFO L93 Difference]: Finished difference Result 227 states and 646 transitions. [2021-06-05 21:13:22,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 21:13:22,781 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:13:22,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:22,782 INFO L225 Difference]: With dead ends: 227 [2021-06-05 21:13:22,782 INFO L226 Difference]: Without dead ends: 205 [2021-06-05 21:13:22,782 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 13.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 21:13:22,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-06-05 21:13:22,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 186. [2021-06-05 21:13:22,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.9513513513513514) internal successors, (546), 185 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:22,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 546 transitions. [2021-06-05 21:13:22,786 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 546 transitions. Word has length 17 [2021-06-05 21:13:22,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:22,787 INFO L482 AbstractCegarLoop]: Abstraction has 186 states and 546 transitions. [2021-06-05 21:13:22,787 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:22,787 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 546 transitions. [2021-06-05 21:13:22,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:13:22,787 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:22,787 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:22,787 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-06-05 21:13:22,787 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:22,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:22,788 INFO L82 PathProgramCache]: Analyzing trace with hash 1201116992, now seen corresponding path program 1 times [2021-06-05 21:13:22,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:22,788 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969418844] [2021-06-05 21:13:22,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:22,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:22,810 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:13:22,811 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:22,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969418844] [2021-06-05 21:13:22,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969418844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:22,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950346491] [2021-06-05 21:13:22,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:22,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:22,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 21:13:22,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:22,922 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:13:22,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950346491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:22,923 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:22,923 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-06-05 21:13:22,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228766580] [2021-06-05 21:13:22,923 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 21:13:22,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:22,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 21:13:22,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 21:13:22,924 INFO L87 Difference]: Start difference. First operand 186 states and 546 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:22,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:22,960 INFO L93 Difference]: Finished difference Result 239 states and 696 transitions. [2021-06-05 21:13:22,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 21:13:22,963 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:13:22,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:22,964 INFO L225 Difference]: With dead ends: 239 [2021-06-05 21:13:22,964 INFO L226 Difference]: Without dead ends: 239 [2021-06-05 21:13:22,964 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 19.4ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:13:22,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-06-05 21:13:22,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 190. [2021-06-05 21:13:22,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 2.9100529100529102) internal successors, (550), 189 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:22,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 550 transitions. [2021-06-05 21:13:22,969 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 550 transitions. Word has length 19 [2021-06-05 21:13:22,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:22,969 INFO L482 AbstractCegarLoop]: Abstraction has 190 states and 550 transitions. [2021-06-05 21:13:22,969 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:22,969 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 550 transitions. [2021-06-05 21:13:22,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:13:22,970 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:22,970 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] [2021-06-05 21:13:23,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:23,189 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:23,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:23,189 INFO L82 PathProgramCache]: Analyzing trace with hash -2080042904, now seen corresponding path program 1 times [2021-06-05 21:13:23,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:23,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261559419] [2021-06-05 21:13:23,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:23,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:23,254 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:23,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:23,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261559419] [2021-06-05 21:13:23,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261559419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:23,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365942538] [2021-06-05 21:13:23,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:23,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:23,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:13:23,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:23,398 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:23,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365942538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:23,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:23,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-06-05 21:13:23,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360179919] [2021-06-05 21:13:23,399 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:13:23,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:23,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:13:23,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:13:23,402 INFO L87 Difference]: Start difference. First operand 190 states and 550 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:23,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:23,491 INFO L93 Difference]: Finished difference Result 342 states and 999 transitions. [2021-06-05 21:13:23,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 21:13:23,492 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:13:23,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:23,493 INFO L225 Difference]: With dead ends: 342 [2021-06-05 21:13:23,493 INFO L226 Difference]: Without dead ends: 327 [2021-06-05 21:13:23,493 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 100.6ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:13:23,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-06-05 21:13:23,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 245. [2021-06-05 21:13:23,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 2.9836065573770494) internal successors, (728), 244 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:23,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 728 transitions. [2021-06-05 21:13:23,499 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 728 transitions. Word has length 21 [2021-06-05 21:13:23,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:23,500 INFO L482 AbstractCegarLoop]: Abstraction has 245 states and 728 transitions. [2021-06-05 21:13:23,500 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:23,500 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 728 transitions. [2021-06-05 21:13:23,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:13:23,501 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:23,501 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] [2021-06-05 21:13:23,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-05 21:13:23,716 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:23,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:23,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1334485332, now seen corresponding path program 2 times [2021-06-05 21:13:23,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:23,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373099274] [2021-06-05 21:13:23,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:23,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:23,762 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:23,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:23,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373099274] [2021-06-05 21:13:23,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373099274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:23,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097667223] [2021-06-05 21:13:23,763 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:23,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:13:23,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:23,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:13:23,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:23,872 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:23,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097667223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:23,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:23,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-06-05 21:13:23,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303985449] [2021-06-05 21:13:23,872 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:13:23,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:23,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:13:23,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:13:23,877 INFO L87 Difference]: Start difference. First operand 245 states and 728 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:23,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:23,960 INFO L93 Difference]: Finished difference Result 394 states and 1167 transitions. [2021-06-05 21:13:23,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 21:13:23,960 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:13:23,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:23,962 INFO L225 Difference]: With dead ends: 394 [2021-06-05 21:13:23,962 INFO L226 Difference]: Without dead ends: 379 [2021-06-05 21:13:23,962 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 81.2ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:13:23,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-06-05 21:13:23,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 280. [2021-06-05 21:13:23,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 2.978494623655914) internal successors, (831), 279 states have internal predecessors, (831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:23,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 831 transitions. [2021-06-05 21:13:23,968 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 831 transitions. Word has length 21 [2021-06-05 21:13:23,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:23,968 INFO L482 AbstractCegarLoop]: Abstraction has 280 states and 831 transitions. [2021-06-05 21:13:23,968 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:23,968 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 831 transitions. [2021-06-05 21:13:23,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:13:23,969 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:23,969 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] [2021-06-05 21:13:24,177 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:24,178 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:24,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:24,178 INFO L82 PathProgramCache]: Analyzing trace with hash 1241595234, now seen corresponding path program 3 times [2021-06-05 21:13:24,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:24,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161066985] [2021-06-05 21:13:24,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:24,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:24,236 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:24,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:24,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161066985] [2021-06-05 21:13:24,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161066985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:24,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853487144] [2021-06-05 21:13:24,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:24,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 21:13:24,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:24,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:13:24,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:24,347 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:24,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853487144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:24,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:24,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-06-05 21:13:24,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049497446] [2021-06-05 21:13:24,348 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:13:24,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:24,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:13:24,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:13:24,348 INFO L87 Difference]: Start difference. First operand 280 states and 831 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:24,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:24,406 INFO L93 Difference]: Finished difference Result 413 states and 1224 transitions. [2021-06-05 21:13:24,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 21:13:24,408 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:13:24,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:24,410 INFO L225 Difference]: With dead ends: 413 [2021-06-05 21:13:24,410 INFO L226 Difference]: Without dead ends: 398 [2021-06-05 21:13:24,410 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 63.8ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:13:24,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2021-06-05 21:13:24,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 292. [2021-06-05 21:13:24,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 2.979381443298969) internal successors, (867), 291 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:24,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 867 transitions. [2021-06-05 21:13:24,416 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 867 transitions. Word has length 21 [2021-06-05 21:13:24,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:24,417 INFO L482 AbstractCegarLoop]: Abstraction has 292 states and 867 transitions. [2021-06-05 21:13:24,417 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:24,417 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 867 transitions. [2021-06-05 21:13:24,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:13:24,418 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:24,418 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] [2021-06-05 21:13:24,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-06-05 21:13:24,629 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:24,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:24,629 INFO L82 PathProgramCache]: Analyzing trace with hash 204187218, now seen corresponding path program 4 times [2021-06-05 21:13:24,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:24,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564448189] [2021-06-05 21:13:24,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:24,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:24,680 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:24,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:24,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564448189] [2021-06-05 21:13:24,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564448189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:24,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297041461] [2021-06-05 21:13:24,680 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:24,718 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:13:24,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:24,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:13:24,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:24,812 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:24,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297041461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:24,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:24,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-06-05 21:13:24,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114179621] [2021-06-05 21:13:24,813 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:13:24,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:24,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:13:24,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:13:24,814 INFO L87 Difference]: Start difference. First operand 292 states and 867 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:24,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:24,890 INFO L93 Difference]: Finished difference Result 421 states and 1248 transitions. [2021-06-05 21:13:24,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 21:13:24,890 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:13:24,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:24,892 INFO L225 Difference]: With dead ends: 421 [2021-06-05 21:13:24,892 INFO L226 Difference]: Without dead ends: 406 [2021-06-05 21:13:24,892 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 73.5ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:13:24,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2021-06-05 21:13:24,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 316. [2021-06-05 21:13:24,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 2.980952380952381) internal successors, (939), 315 states have internal predecessors, (939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:24,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 939 transitions. [2021-06-05 21:13:24,900 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 939 transitions. Word has length 21 [2021-06-05 21:13:24,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:24,901 INFO L482 AbstractCegarLoop]: Abstraction has 316 states and 939 transitions. [2021-06-05 21:13:24,901 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:24,901 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 939 transitions. [2021-06-05 21:13:24,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:13:24,902 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:24,902 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] [2021-06-05 21:13:25,117 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:25,117 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:25,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:25,117 INFO L82 PathProgramCache]: Analyzing trace with hash -1380051106, now seen corresponding path program 5 times [2021-06-05 21:13:25,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:25,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965104029] [2021-06-05 21:13:25,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:25,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:25,213 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:25,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:25,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965104029] [2021-06-05 21:13:25,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965104029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:25,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769375932] [2021-06-05 21:13:25,213 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:25,245 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:13:25,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:25,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:13:25,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:25,341 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:25,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769375932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:25,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:25,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-06-05 21:13:25,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914198975] [2021-06-05 21:13:25,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:13:25,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:25,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:13:25,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:13:25,343 INFO L87 Difference]: Start difference. First operand 316 states and 939 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:25,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:25,407 INFO L93 Difference]: Finished difference Result 491 states and 1452 transitions. [2021-06-05 21:13:25,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 21:13:25,407 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:13:25,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:25,410 INFO L225 Difference]: With dead ends: 491 [2021-06-05 21:13:25,411 INFO L226 Difference]: Without dead ends: 476 [2021-06-05 21:13:25,411 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 70.7ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:13:25,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-06-05 21:13:25,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 341. [2021-06-05 21:13:25,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 2.973529411764706) internal successors, (1011), 340 states have internal predecessors, (1011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:25,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1011 transitions. [2021-06-05 21:13:25,418 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1011 transitions. Word has length 21 [2021-06-05 21:13:25,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:25,419 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 1011 transitions. [2021-06-05 21:13:25,419 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:25,419 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1011 transitions. [2021-06-05 21:13:25,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:13:25,419 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:25,420 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] [2021-06-05 21:13:25,635 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-05 21:13:25,638 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:25,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:25,638 INFO L82 PathProgramCache]: Analyzing trace with hash 1758862818, now seen corresponding path program 6 times [2021-06-05 21:13:25,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:25,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651226038] [2021-06-05 21:13:25,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:25,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:25,694 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:25,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:25,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651226038] [2021-06-05 21:13:25,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651226038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:25,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267067605] [2021-06-05 21:13:25,694 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:25,749 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 21:13:25,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:25,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:13:25,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:25,811 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:25,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267067605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:25,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:25,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-06-05 21:13:25,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184839766] [2021-06-05 21:13:25,811 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:13:25,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:25,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:13:25,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:13:25,812 INFO L87 Difference]: Start difference. First operand 341 states and 1011 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:25,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:25,899 INFO L93 Difference]: Finished difference Result 473 states and 1400 transitions. [2021-06-05 21:13:25,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 21:13:25,900 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:13:25,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:25,902 INFO L225 Difference]: With dead ends: 473 [2021-06-05 21:13:25,902 INFO L226 Difference]: Without dead ends: 458 [2021-06-05 21:13:25,903 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 76.2ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:13:25,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-06-05 21:13:25,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 341. [2021-06-05 21:13:25,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 2.973529411764706) internal successors, (1011), 340 states have internal predecessors, (1011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:25,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1011 transitions. [2021-06-05 21:13:25,912 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1011 transitions. Word has length 21 [2021-06-05 21:13:25,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:25,912 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 1011 transitions. [2021-06-05 21:13:25,912 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:25,912 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1011 transitions. [2021-06-05 21:13:25,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 21:13:25,913 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:25,913 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] [2021-06-05 21:13:26,126 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 21:13:26,126 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:26,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:26,126 INFO L82 PathProgramCache]: Analyzing trace with hash -1287155254, now seen corresponding path program 7 times [2021-06-05 21:13:26,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:26,127 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474777292] [2021-06-05 21:13:26,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:26,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:26,153 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:26,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:26,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474777292] [2021-06-05 21:13:26,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474777292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:26,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568177954] [2021-06-05 21:13:26,153 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:26,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:26,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 21:13:26,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:26,227 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:26,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568177954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:26,227 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:26,227 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-06-05 21:13:26,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065561481] [2021-06-05 21:13:26,227 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:13:26,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:26,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:13:26,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:13:26,228 INFO L87 Difference]: Start difference. First operand 341 states and 1011 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:26,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:26,370 INFO L93 Difference]: Finished difference Result 749 states and 2150 transitions. [2021-06-05 21:13:26,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:13:26,373 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 21:13:26,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:26,375 INFO L225 Difference]: With dead ends: 749 [2021-06-05 21:13:26,375 INFO L226 Difference]: Without dead ends: 749 [2021-06-05 21:13:26,376 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 78.6ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:13:26,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2021-06-05 21:13:26,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 430. [2021-06-05 21:13:26,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 429 states have (on average 3.1095571095571097) internal successors, (1334), 429 states have internal predecessors, (1334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:26,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 1334 transitions. [2021-06-05 21:13:26,388 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 1334 transitions. Word has length 23 [2021-06-05 21:13:26,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:26,388 INFO L482 AbstractCegarLoop]: Abstraction has 430 states and 1334 transitions. [2021-06-05 21:13:26,388 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:26,388 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 1334 transitions. [2021-06-05 21:13:26,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 21:13:26,389 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:26,389 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] [2021-06-05 21:13:26,613 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-05 21:13:26,613 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:26,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:26,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1821721226, now seen corresponding path program 8 times [2021-06-05 21:13:26,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:26,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023592327] [2021-06-05 21:13:26,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:26,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:26,653 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:26,653 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:26,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023592327] [2021-06-05 21:13:26,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023592327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:26,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722559006] [2021-06-05 21:13:26,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:26,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:13:26,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:26,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 21:13:26,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:26,731 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:26,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722559006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:26,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:26,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-06-05 21:13:26,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204923828] [2021-06-05 21:13:26,733 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:13:26,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:26,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:13:26,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:13:26,733 INFO L87 Difference]: Start difference. First operand 430 states and 1334 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:26,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:26,837 INFO L93 Difference]: Finished difference Result 758 states and 2270 transitions. [2021-06-05 21:13:26,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:13:26,838 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 21:13:26,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:26,840 INFO L225 Difference]: With dead ends: 758 [2021-06-05 21:13:26,841 INFO L226 Difference]: Without dead ends: 733 [2021-06-05 21:13:26,841 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 51.5ms TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:13:26,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states. [2021-06-05 21:13:26,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 583. [2021-06-05 21:13:26,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 582 states have (on average 3.1597938144329896) internal successors, (1839), 582 states have internal predecessors, (1839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:26,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 1839 transitions. [2021-06-05 21:13:26,854 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 1839 transitions. Word has length 23 [2021-06-05 21:13:26,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:26,855 INFO L482 AbstractCegarLoop]: Abstraction has 583 states and 1839 transitions. [2021-06-05 21:13:26,855 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:26,855 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 1839 transitions. [2021-06-05 21:13:26,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 21:13:26,864 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:26,864 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] [2021-06-05 21:13:27,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 21:13:27,080 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:27,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:27,081 INFO L82 PathProgramCache]: Analyzing trace with hash -63390266, now seen corresponding path program 9 times [2021-06-05 21:13:27,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:27,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566573767] [2021-06-05 21:13:27,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:27,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:27,099 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:13:27,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:27,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566573767] [2021-06-05 21:13:27,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566573767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:27,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727021288] [2021-06-05 21:13:27,099 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:27,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:13:27,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:27,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 21:13:27,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:27,169 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:13:27,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727021288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:27,170 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:27,170 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 21:13:27,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410561357] [2021-06-05 21:13:27,170 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:13:27,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:27,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:13:27,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:13:27,171 INFO L87 Difference]: Start difference. First operand 583 states and 1839 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:27,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:27,236 INFO L93 Difference]: Finished difference Result 1311 states and 4123 transitions. [2021-06-05 21:13:27,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:13:27,236 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 21:13:27,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:27,241 INFO L225 Difference]: With dead ends: 1311 [2021-06-05 21:13:27,241 INFO L226 Difference]: Without dead ends: 1275 [2021-06-05 21:13:27,241 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 27.4ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:13:27,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1275 states. [2021-06-05 21:13:27,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1275 to 821. [2021-06-05 21:13:27,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 821 states, 820 states have (on average 3.34390243902439) internal successors, (2742), 820 states have internal predecessors, (2742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:27,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 2742 transitions. [2021-06-05 21:13:27,259 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 2742 transitions. Word has length 23 [2021-06-05 21:13:27,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:27,259 INFO L482 AbstractCegarLoop]: Abstraction has 821 states and 2742 transitions. [2021-06-05 21:13:27,259 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:27,259 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 2742 transitions. [2021-06-05 21:13:27,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 21:13:27,261 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:27,261 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] [2021-06-05 21:13:27,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-05 21:13:27,477 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:27,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:27,478 INFO L82 PathProgramCache]: Analyzing trace with hash -1548958394, now seen corresponding path program 10 times [2021-06-05 21:13:27,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:27,480 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913042897] [2021-06-05 21:13:27,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:27,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:27,502 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:27,502 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:27,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913042897] [2021-06-05 21:13:27,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913042897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:27,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758550314] [2021-06-05 21:13:27,502 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:27,552 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:13:27,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:27,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 21:13:27,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:27,592 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:27,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758550314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:27,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:27,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-06-05 21:13:27,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067138448] [2021-06-05 21:13:27,593 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:13:27,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:27,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:13:27,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:13:27,593 INFO L87 Difference]: Start difference. First operand 821 states and 2742 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) 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 21:13:27,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:27,699 INFO L93 Difference]: Finished difference Result 1047 states and 3326 transitions. [2021-06-05 21:13:27,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:13:27,699 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) 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 23 [2021-06-05 21:13:27,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:27,704 INFO L225 Difference]: With dead ends: 1047 [2021-06-05 21:13:27,704 INFO L226 Difference]: Without dead ends: 1047 [2021-06-05 21:13:27,704 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 45.8ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:13:27,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1047 states. [2021-06-05 21:13:27,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1047 to 829. [2021-06-05 21:13:27,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 829 states, 828 states have (on average 3.321256038647343) internal successors, (2750), 828 states have internal predecessors, (2750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:27,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 829 states to 829 states and 2750 transitions. [2021-06-05 21:13:27,721 INFO L78 Accepts]: Start accepts. Automaton has 829 states and 2750 transitions. Word has length 23 [2021-06-05 21:13:27,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:27,721 INFO L482 AbstractCegarLoop]: Abstraction has 829 states and 2750 transitions. [2021-06-05 21:13:27,721 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.571428571428571) 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 21:13:27,721 INFO L276 IsEmpty]: Start isEmpty. Operand 829 states and 2750 transitions. [2021-06-05 21:13:27,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 21:13:27,723 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:27,723 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] [2021-06-05 21:13:27,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:27,941 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:27,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:27,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1102347518, now seen corresponding path program 11 times [2021-06-05 21:13:27,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:27,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825975698] [2021-06-05 21:13:27,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:27,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:27,970 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:27,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:27,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825975698] [2021-06-05 21:13:27,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825975698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:27,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839174743] [2021-06-05 21:13:27,971 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:27,999 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:13:28,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:28,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 21:13:28,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:28,043 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:28,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839174743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:28,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:28,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-06-05 21:13:28,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081168649] [2021-06-05 21:13:28,043 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:13:28,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:28,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:13:28,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:13:28,044 INFO L87 Difference]: Start difference. First operand 829 states and 2750 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) 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 21:13:28,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:28,122 INFO L93 Difference]: Finished difference Result 1062 states and 3341 transitions. [2021-06-05 21:13:28,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:13:28,122 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) 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 23 [2021-06-05 21:13:28,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:28,126 INFO L225 Difference]: With dead ends: 1062 [2021-06-05 21:13:28,126 INFO L226 Difference]: Without dead ends: 1056 [2021-06-05 21:13:28,126 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 34.6ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:13:28,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1056 states. [2021-06-05 21:13:28,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1056 to 852. [2021-06-05 21:13:28,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 852 states, 851 states have (on average 3.2925969447708576) internal successors, (2802), 851 states have internal predecessors, (2802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:28,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 852 states to 852 states and 2802 transitions. [2021-06-05 21:13:28,142 INFO L78 Accepts]: Start accepts. Automaton has 852 states and 2802 transitions. Word has length 23 [2021-06-05 21:13:28,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:28,142 INFO L482 AbstractCegarLoop]: Abstraction has 852 states and 2802 transitions. [2021-06-05 21:13:28,142 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.571428571428571) 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 21:13:28,142 INFO L276 IsEmpty]: Start isEmpty. Operand 852 states and 2802 transitions. [2021-06-05 21:13:28,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 21:13:28,144 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:28,144 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] [2021-06-05 21:13:28,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2021-06-05 21:13:28,360 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:28,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:28,360 INFO L82 PathProgramCache]: Analyzing trace with hash 50200326, now seen corresponding path program 12 times [2021-06-05 21:13:28,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:28,360 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372154185] [2021-06-05 21:13:28,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:28,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:28,380 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:28,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:28,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372154185] [2021-06-05 21:13:28,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372154185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:28,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369843310] [2021-06-05 21:13:28,380 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:28,421 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:13:28,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:28,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 21:13:28,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:28,463 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:13:28,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369843310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:28,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:28,463 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-06-05 21:13:28,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563463303] [2021-06-05 21:13:28,464 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:13:28,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:28,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:13:28,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:13:28,464 INFO L87 Difference]: Start difference. First operand 852 states and 2802 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:28,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:28,836 INFO L93 Difference]: Finished difference Result 2185 states and 6702 transitions. [2021-06-05 21:13:28,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 21:13:28,837 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 21:13:28,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:28,844 INFO L225 Difference]: With dead ends: 2185 [2021-06-05 21:13:28,844 INFO L226 Difference]: Without dead ends: 2149 [2021-06-05 21:13:28,844 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 192.8ms TimeCoverageRelationStatistics Valid=245, Invalid=811, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 21:13:28,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2149 states. [2021-06-05 21:13:28,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2149 to 941. [2021-06-05 21:13:28,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 941 states, 940 states have (on average 3.331914893617021) internal successors, (3132), 940 states have internal predecessors, (3132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:28,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 941 states to 941 states and 3132 transitions. [2021-06-05 21:13:28,869 INFO L78 Accepts]: Start accepts. Automaton has 941 states and 3132 transitions. Word has length 23 [2021-06-05 21:13:28,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:28,869 INFO L482 AbstractCegarLoop]: Abstraction has 941 states and 3132 transitions. [2021-06-05 21:13:28,869 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:28,869 INFO L276 IsEmpty]: Start isEmpty. Operand 941 states and 3132 transitions. [2021-06-05 21:13:28,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 21:13:28,872 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:28,872 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] [2021-06-05 21:13:29,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:29,089 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:29,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:29,089 INFO L82 PathProgramCache]: Analyzing trace with hash -32096124, now seen corresponding path program 13 times [2021-06-05 21:13:29,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:29,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258860860] [2021-06-05 21:13:29,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:29,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:29,112 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:29,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:29,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258860860] [2021-06-05 21:13:29,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258860860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:29,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493989209] [2021-06-05 21:13:29,112 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:29,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:29,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 21:13:29,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:29,196 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:13:29,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493989209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:29,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:29,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-06-05 21:13:29,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12133376] [2021-06-05 21:13:29,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:13:29,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:29,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:13:29,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:13:29,197 INFO L87 Difference]: Start difference. First operand 941 states and 3132 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) 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 21:13:29,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:29,261 INFO L93 Difference]: Finished difference Result 1660 states and 5311 transitions. [2021-06-05 21:13:29,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:13:29,262 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) 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 23 [2021-06-05 21:13:29,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:29,268 INFO L225 Difference]: With dead ends: 1660 [2021-06-05 21:13:29,268 INFO L226 Difference]: Without dead ends: 1660 [2021-06-05 21:13:29,269 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 36.8ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:13:29,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1660 states. [2021-06-05 21:13:29,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1660 to 1146. [2021-06-05 21:13:29,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1146 states, 1145 states have (on average 3.4) internal successors, (3893), 1145 states have internal predecessors, (3893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:29,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1146 states to 1146 states and 3893 transitions. [2021-06-05 21:13:29,290 INFO L78 Accepts]: Start accepts. Automaton has 1146 states and 3893 transitions. Word has length 23 [2021-06-05 21:13:29,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:29,291 INFO L482 AbstractCegarLoop]: Abstraction has 1146 states and 3893 transitions. [2021-06-05 21:13:29,291 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.571428571428571) 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 21:13:29,291 INFO L276 IsEmpty]: Start isEmpty. Operand 1146 states and 3893 transitions. [2021-06-05 21:13:29,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 21:13:29,293 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:29,293 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] [2021-06-05 21:13:29,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-06-05 21:13:29,501 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:29,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:29,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1539696380, now seen corresponding path program 14 times [2021-06-05 21:13:29,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:29,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980533807] [2021-06-05 21:13:29,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:29,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:29,523 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:29,523 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:29,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980533807] [2021-06-05 21:13:29,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980533807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:29,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788776516] [2021-06-05 21:13:29,523 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:29,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:13:29,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:29,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 21:13:29,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:29,601 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:29,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788776516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:29,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:29,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-06-05 21:13:29,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103837084] [2021-06-05 21:13:29,601 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:13:29,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:29,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:13:29,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:13:29,602 INFO L87 Difference]: Start difference. First operand 1146 states and 3893 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:29,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:29,974 INFO L93 Difference]: Finished difference Result 2541 states and 8351 transitions. [2021-06-05 21:13:29,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 21:13:29,974 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 21:13:29,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:29,982 INFO L225 Difference]: With dead ends: 2541 [2021-06-05 21:13:29,982 INFO L226 Difference]: Without dead ends: 2369 [2021-06-05 21:13:29,983 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 209.2ms TimeCoverageRelationStatistics Valid=248, Invalid=622, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:13:29,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2369 states. [2021-06-05 21:13:30,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2369 to 1684. [2021-06-05 21:13:30,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1684 states, 1683 states have (on average 3.474747474747475) internal successors, (5848), 1683 states have internal predecessors, (5848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:30,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1684 states to 1684 states and 5848 transitions. [2021-06-05 21:13:30,014 INFO L78 Accepts]: Start accepts. Automaton has 1684 states and 5848 transitions. Word has length 23 [2021-06-05 21:13:30,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:30,015 INFO L482 AbstractCegarLoop]: Abstraction has 1684 states and 5848 transitions. [2021-06-05 21:13:30,015 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:30,015 INFO L276 IsEmpty]: Start isEmpty. Operand 1684 states and 5848 transitions. [2021-06-05 21:13:30,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 21:13:30,017 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:30,017 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] [2021-06-05 21:13:30,234 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:30,234 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:30,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:30,234 INFO L82 PathProgramCache]: Analyzing trace with hash 2142929212, now seen corresponding path program 15 times [2021-06-05 21:13:30,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:30,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527573084] [2021-06-05 21:13:30,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:30,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:30,260 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:30,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:30,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527573084] [2021-06-05 21:13:30,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527573084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:30,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529226604] [2021-06-05 21:13:30,260 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:30,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:13:30,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:30,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 21:13:30,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:30,332 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:30,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529226604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:30,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:30,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-06-05 21:13:30,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85542359] [2021-06-05 21:13:30,333 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:13:30,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:30,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:13:30,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:13:30,333 INFO L87 Difference]: Start difference. First operand 1684 states and 5848 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:30,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:30,639 INFO L93 Difference]: Finished difference Result 4179 states and 14030 transitions. [2021-06-05 21:13:30,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:13:30,640 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 21:13:30,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:30,651 INFO L225 Difference]: With dead ends: 4179 [2021-06-05 21:13:30,651 INFO L226 Difference]: Without dead ends: 4076 [2021-06-05 21:13:30,652 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 164.5ms TimeCoverageRelationStatistics Valid=177, Invalid=525, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:13:30,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4076 states. [2021-06-05 21:13:30,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4076 to 2798. [2021-06-05 21:13:30,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2798 states, 2797 states have (on average 3.5723989989274223) internal successors, (9992), 2797 states have internal predecessors, (9992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:30,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2798 states to 2798 states and 9992 transitions. [2021-06-05 21:13:30,705 INFO L78 Accepts]: Start accepts. Automaton has 2798 states and 9992 transitions. Word has length 23 [2021-06-05 21:13:30,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:30,705 INFO L482 AbstractCegarLoop]: Abstraction has 2798 states and 9992 transitions. [2021-06-05 21:13:30,705 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:30,706 INFO L276 IsEmpty]: Start isEmpty. Operand 2798 states and 9992 transitions. [2021-06-05 21:13:30,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 21:13:30,710 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:30,710 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] [2021-06-05 21:13:30,925 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-05 21:13:30,925 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:30,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:30,925 INFO L82 PathProgramCache]: Analyzing trace with hash 2023712944, now seen corresponding path program 16 times [2021-06-05 21:13:30,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:30,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475686787] [2021-06-05 21:13:30,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:30,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:30,956 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:30,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:30,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475686787] [2021-06-05 21:13:30,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475686787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:30,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914273771] [2021-06-05 21:13:30,956 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:30,981 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:13:30,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:30,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 21:13:30,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:31,019 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:31,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914273771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:31,020 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:31,020 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 8 [2021-06-05 21:13:31,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847505094] [2021-06-05 21:13:31,020 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:13:31,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:31,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:13:31,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:13:31,021 INFO L87 Difference]: Start difference. First operand 2798 states and 9992 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:31,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:31,133 INFO L93 Difference]: Finished difference Result 3396 states and 11614 transitions. [2021-06-05 21:13:31,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:13:31,134 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 21:13:31,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:31,144 INFO L225 Difference]: With dead ends: 3396 [2021-06-05 21:13:31,145 INFO L226 Difference]: Without dead ends: 3345 [2021-06-05 21:13:31,145 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 47.5ms TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:13:31,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3345 states. [2021-06-05 21:13:31,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3345 to 2812. [2021-06-05 21:13:31,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2812 states, 2811 states have (on average 3.55923159018143) internal successors, (10005), 2811 states have internal predecessors, (10005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:31,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2812 states to 2812 states and 10005 transitions. [2021-06-05 21:13:31,197 INFO L78 Accepts]: Start accepts. Automaton has 2812 states and 10005 transitions. Word has length 23 [2021-06-05 21:13:31,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:31,197 INFO L482 AbstractCegarLoop]: Abstraction has 2812 states and 10005 transitions. [2021-06-05 21:13:31,198 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:31,198 INFO L276 IsEmpty]: Start isEmpty. Operand 2812 states and 10005 transitions. [2021-06-05 21:13:31,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 21:13:31,203 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:31,203 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] [2021-06-05 21:13:31,421 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-05 21:13:31,421 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:31,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:31,421 INFO L82 PathProgramCache]: Analyzing trace with hash 783282608, now seen corresponding path program 17 times [2021-06-05 21:13:31,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:31,422 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733127883] [2021-06-05 21:13:31,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:31,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:31,441 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:31,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:31,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733127883] [2021-06-05 21:13:31,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733127883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:31,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723884057] [2021-06-05 21:13:31,442 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:31,468 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:13:31,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:31,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 21:13:31,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:31,495 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:13:31,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723884057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:31,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:31,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-05 21:13:31,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853802984] [2021-06-05 21:13:31,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 21:13:31,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:31,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 21:13:31,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 21:13:31,496 INFO L87 Difference]: Start difference. First operand 2812 states and 10005 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:31,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:31,558 INFO L93 Difference]: Finished difference Result 4023 states and 13889 transitions. [2021-06-05 21:13:31,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 21:13:31,559 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 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 23 [2021-06-05 21:13:31,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:31,565 INFO L225 Difference]: With dead ends: 4023 [2021-06-05 21:13:31,565 INFO L226 Difference]: Without dead ends: 4005 [2021-06-05 21:13:31,566 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 16.9ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:13:31,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4005 states. [2021-06-05 21:13:31,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4005 to 3260. [2021-06-05 21:13:31,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3260 states, 3259 states have (on average 3.59159251304081) internal successors, (11705), 3259 states have internal predecessors, (11705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:31,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3260 states to 3260 states and 11705 transitions. [2021-06-05 21:13:31,630 INFO L78 Accepts]: Start accepts. Automaton has 3260 states and 11705 transitions. Word has length 23 [2021-06-05 21:13:31,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:31,630 INFO L482 AbstractCegarLoop]: Abstraction has 3260 states and 11705 transitions. [2021-06-05 21:13:31,630 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:31,630 INFO L276 IsEmpty]: Start isEmpty. Operand 3260 states and 11705 transitions. [2021-06-05 21:13:31,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 21:13:31,635 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:31,635 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] [2021-06-05 21:13:31,851 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-05 21:13:31,852 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:31,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:31,852 INFO L82 PathProgramCache]: Analyzing trace with hash 530496180, now seen corresponding path program 18 times [2021-06-05 21:13:31,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:31,852 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785889255] [2021-06-05 21:13:31,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:31,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:31,867 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:31,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:31,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785889255] [2021-06-05 21:13:31,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785889255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:31,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324328584] [2021-06-05 21:13:31,868 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:31,919 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:13:31,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:31,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 21:13:31,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:31,955 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:13:31,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324328584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:31,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:31,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-06-05 21:13:31,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741405440] [2021-06-05 21:13:31,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:13:31,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:31,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:13:31,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:13:31,957 INFO L87 Difference]: Start difference. First operand 3260 states and 11705 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:32,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:32,335 INFO L93 Difference]: Finished difference Result 8888 states and 30108 transitions. [2021-06-05 21:13:32,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 21:13:32,335 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 21:13:32,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:32,351 INFO L225 Difference]: With dead ends: 8888 [2021-06-05 21:13:32,351 INFO L226 Difference]: Without dead ends: 8754 [2021-06-05 21:13:32,352 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 186.8ms TimeCoverageRelationStatistics Valid=276, Invalid=914, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 21:13:32,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8754 states. [2021-06-05 21:13:32,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8754 to 5409. [2021-06-05 21:13:32,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5409 states, 5408 states have (on average 3.689164201183432) internal successors, (19951), 5408 states have internal predecessors, (19951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:32,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5409 states to 5409 states and 19951 transitions. [2021-06-05 21:13:32,467 INFO L78 Accepts]: Start accepts. Automaton has 5409 states and 19951 transitions. Word has length 23 [2021-06-05 21:13:32,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:32,467 INFO L482 AbstractCegarLoop]: Abstraction has 5409 states and 19951 transitions. [2021-06-05 21:13:32,467 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:32,467 INFO L276 IsEmpty]: Start isEmpty. Operand 5409 states and 19951 transitions. [2021-06-05 21:13:32,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 21:13:32,477 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:32,477 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] [2021-06-05 21:13:32,693 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-05 21:13:32,693 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:32,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:32,693 INFO L82 PathProgramCache]: Analyzing trace with hash 254898436, now seen corresponding path program 19 times [2021-06-05 21:13:32,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:32,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699810976] [2021-06-05 21:13:32,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:32,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:32,712 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:32,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:32,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699810976] [2021-06-05 21:13:32,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699810976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:32,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274965650] [2021-06-05 21:13:32,713 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:32,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:32,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 21:13:32,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:32,811 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:32,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274965650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:32,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:32,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 21:13:32,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783231488] [2021-06-05 21:13:32,811 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:13:32,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:32,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:13:32,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:13:32,813 INFO L87 Difference]: Start difference. First operand 5409 states and 19951 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) 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 21:13:32,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:32,897 INFO L93 Difference]: Finished difference Result 6626 states and 23548 transitions. [2021-06-05 21:13:32,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:13:32,898 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) 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 23 [2021-06-05 21:13:32,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:32,910 INFO L225 Difference]: With dead ends: 6626 [2021-06-05 21:13:32,910 INFO L226 Difference]: Without dead ends: 6576 [2021-06-05 21:13:32,911 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 33.7ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:13:32,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6576 states. [2021-06-05 21:13:32,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6576 to 5617. [2021-06-05 21:13:32,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5617 states, 5616 states have (on average 3.6428062678062676) internal successors, (20458), 5616 states have internal predecessors, (20458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:33,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5617 states to 5617 states and 20458 transitions. [2021-06-05 21:13:33,008 INFO L78 Accepts]: Start accepts. Automaton has 5617 states and 20458 transitions. Word has length 23 [2021-06-05 21:13:33,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:33,009 INFO L482 AbstractCegarLoop]: Abstraction has 5617 states and 20458 transitions. [2021-06-05 21:13:33,009 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.571428571428571) 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 21:13:33,009 INFO L276 IsEmpty]: Start isEmpty. Operand 5617 states and 20458 transitions. [2021-06-05 21:13:33,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 21:13:33,024 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:33,024 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] [2021-06-05 21:13:33,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-06-05 21:13:33,240 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:33,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:33,241 INFO L82 PathProgramCache]: Analyzing trace with hash 1159769024, now seen corresponding path program 20 times [2021-06-05 21:13:33,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:33,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914523871] [2021-06-05 21:13:33,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:33,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:33,269 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:33,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:33,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914523871] [2021-06-05 21:13:33,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914523871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:33,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322299748] [2021-06-05 21:13:33,269 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:33,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:13:33,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:33,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 21:13:33,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:33,345 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:13:33,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322299748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:33,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:33,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-06-05 21:13:33,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503466077] [2021-06-05 21:13:33,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:13:33,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:33,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:13:33,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:13:33,346 INFO L87 Difference]: Start difference. First operand 5617 states and 20458 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:33,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:33,732 INFO L93 Difference]: Finished difference Result 12332 states and 42412 transitions. [2021-06-05 21:13:33,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 21:13:33,733 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 21:13:33,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:33,754 INFO L225 Difference]: With dead ends: 12332 [2021-06-05 21:13:33,754 INFO L226 Difference]: Without dead ends: 12185 [2021-06-05 21:13:33,754 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 190.6ms TimeCoverageRelationStatistics Valid=261, Invalid=795, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 21:13:33,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12185 states. [2021-06-05 21:13:33,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12185 to 8357. [2021-06-05 21:13:33,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8357 states, 8356 states have (on average 3.7277405457156534) internal successors, (31149), 8356 states have internal predecessors, (31149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:33,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8357 states to 8357 states and 31149 transitions. [2021-06-05 21:13:33,914 INFO L78 Accepts]: Start accepts. Automaton has 8357 states and 31149 transitions. Word has length 23 [2021-06-05 21:13:33,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:33,914 INFO L482 AbstractCegarLoop]: Abstraction has 8357 states and 31149 transitions. [2021-06-05 21:13:33,914 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:33,914 INFO L276 IsEmpty]: Start isEmpty. Operand 8357 states and 31149 transitions. [2021-06-05 21:13:33,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 21:13:33,928 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:33,928 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] [2021-06-05 21:13:34,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:34,145 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:34,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:34,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1991076932, now seen corresponding path program 21 times [2021-06-05 21:13:34,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:34,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247012138] [2021-06-05 21:13:34,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:34,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:34,162 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:34,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:34,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247012138] [2021-06-05 21:13:34,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247012138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:34,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393378773] [2021-06-05 21:13:34,163 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:34,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 21:13:34,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:34,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 21:13:34,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:34,235 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:13:34,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393378773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:34,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:34,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-06-05 21:13:34,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677864815] [2021-06-05 21:13:34,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:13:34,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:34,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:13:34,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:13:34,236 INFO L87 Difference]: Start difference. First operand 8357 states and 31149 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:34,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:34,582 INFO L93 Difference]: Finished difference Result 11103 states and 39610 transitions. [2021-06-05 21:13:34,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 21:13:34,582 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 21:13:34,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:34,602 INFO L225 Difference]: With dead ends: 11103 [2021-06-05 21:13:34,603 INFO L226 Difference]: Without dead ends: 10950 [2021-06-05 21:13:34,603 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 138.2ms TimeCoverageRelationStatistics Valid=177, Invalid=579, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:13:34,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10950 states. [2021-06-05 21:13:34,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10950 to 8492. [2021-06-05 21:13:34,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8492 states, 8491 states have (on average 3.725120716052291) internal successors, (31630), 8491 states have internal predecessors, (31630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:34,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8492 states to 8492 states and 31630 transitions. [2021-06-05 21:13:34,776 INFO L78 Accepts]: Start accepts. Automaton has 8492 states and 31630 transitions. Word has length 23 [2021-06-05 21:13:34,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:34,776 INFO L482 AbstractCegarLoop]: Abstraction has 8492 states and 31630 transitions. [2021-06-05 21:13:34,776 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:34,776 INFO L276 IsEmpty]: Start isEmpty. Operand 8492 states and 31630 transitions. [2021-06-05 21:13:34,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 21:13:34,792 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:34,792 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:35,005 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:35,005 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:35,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:35,005 INFO L82 PathProgramCache]: Analyzing trace with hash -553390134, now seen corresponding path program 22 times [2021-06-05 21:13:35,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:35,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482030284] [2021-06-05 21:13:35,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:35,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:35,103 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:35,103 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:35,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482030284] [2021-06-05 21:13:35,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482030284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:35,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018708869] [2021-06-05 21:13:35,104 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:35,129 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:13:35,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:35,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:13:35,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:35,322 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:35,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018708869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:35,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:35,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 21:13:35,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307470058] [2021-06-05 21:13:35,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:13:35,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:35,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:13:35,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:13:35,324 INFO L87 Difference]: Start difference. First operand 8492 states and 31630 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:35,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:35,687 INFO L93 Difference]: Finished difference Result 8694 states and 32230 transitions. [2021-06-05 21:13:35,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:13:35,687 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 21:13:35,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:35,701 INFO L225 Difference]: With dead ends: 8694 [2021-06-05 21:13:35,701 INFO L226 Difference]: Without dead ends: 8679 [2021-06-05 21:13:35,701 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 252.9ms TimeCoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:13:35,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8679 states. [2021-06-05 21:13:35,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8679 to 8558. [2021-06-05 21:13:35,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8558 states, 8557 states have (on average 3.722098866425149) internal successors, (31850), 8557 states have internal predecessors, (31850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:35,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8558 states to 8558 states and 31850 transitions. [2021-06-05 21:13:35,821 INFO L78 Accepts]: Start accepts. Automaton has 8558 states and 31850 transitions. Word has length 27 [2021-06-05 21:13:35,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:35,821 INFO L482 AbstractCegarLoop]: Abstraction has 8558 states and 31850 transitions. [2021-06-05 21:13:35,821 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:35,822 INFO L276 IsEmpty]: Start isEmpty. Operand 8558 states and 31850 transitions. [2021-06-05 21:13:35,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 21:13:35,836 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:35,836 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:36,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:36,041 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:36,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:36,041 INFO L82 PathProgramCache]: Analyzing trace with hash -546769482, now seen corresponding path program 23 times [2021-06-05 21:13:36,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:36,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979117051] [2021-06-05 21:13:36,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:36,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:36,104 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:36,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:36,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979117051] [2021-06-05 21:13:36,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979117051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:36,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235522508] [2021-06-05 21:13:36,105 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:36,129 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:13:36,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:36,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:13:36,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:36,268 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:36,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235522508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:36,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:36,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 21:13:36,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805177665] [2021-06-05 21:13:36,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:13:36,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:36,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:13:36,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:13:36,269 INFO L87 Difference]: Start difference. First operand 8558 states and 31850 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:36,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:36,521 INFO L93 Difference]: Finished difference Result 8977 states and 33000 transitions. [2021-06-05 21:13:36,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:13:36,522 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 21:13:36,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:36,538 INFO L225 Difference]: With dead ends: 8977 [2021-06-05 21:13:36,538 INFO L226 Difference]: Without dead ends: 8896 [2021-06-05 21:13:36,538 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 183.5ms TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:13:36,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8896 states. [2021-06-05 21:13:36,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8896 to 8629. [2021-06-05 21:13:36,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8629 states, 8628 states have (on average 3.7192860454334724) internal successors, (32090), 8628 states have internal predecessors, (32090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:36,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8629 states to 8629 states and 32090 transitions. [2021-06-05 21:13:36,693 INFO L78 Accepts]: Start accepts. Automaton has 8629 states and 32090 transitions. Word has length 27 [2021-06-05 21:13:36,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:36,693 INFO L482 AbstractCegarLoop]: Abstraction has 8629 states and 32090 transitions. [2021-06-05 21:13:36,693 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:36,693 INFO L276 IsEmpty]: Start isEmpty. Operand 8629 states and 32090 transitions. [2021-06-05 21:13:36,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 21:13:36,707 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:36,707 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:36,907 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-06-05 21:13:36,907 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:36,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:36,908 INFO L82 PathProgramCache]: Analyzing trace with hash 1765844602, now seen corresponding path program 24 times [2021-06-05 21:13:36,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:36,908 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298466614] [2021-06-05 21:13:36,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:36,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:36,968 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:36,968 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:36,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298466614] [2021-06-05 21:13:36,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298466614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:36,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800788722] [2021-06-05 21:13:36,968 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:37,020 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:13:37,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:37,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:13:37,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:37,218 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:37,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800788722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:37,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:37,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 21:13:37,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42671800] [2021-06-05 21:13:37,219 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:13:37,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:37,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:13:37,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:13:37,219 INFO L87 Difference]: Start difference. First operand 8629 states and 32090 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:37,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:37,506 INFO L93 Difference]: Finished difference Result 9107 states and 33442 transitions. [2021-06-05 21:13:37,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:13:37,506 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 21:13:37,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:37,523 INFO L225 Difference]: With dead ends: 9107 [2021-06-05 21:13:37,524 INFO L226 Difference]: Without dead ends: 9029 [2021-06-05 21:13:37,524 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 198.1ms TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:13:37,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9029 states. [2021-06-05 21:13:37,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9029 to 8705. [2021-06-05 21:13:37,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8705 states, 8704 states have (on average 3.7188648897058822) internal successors, (32369), 8704 states have internal predecessors, (32369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:37,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8705 states to 8705 states and 32369 transitions. [2021-06-05 21:13:37,715 INFO L78 Accepts]: Start accepts. Automaton has 8705 states and 32369 transitions. Word has length 27 [2021-06-05 21:13:37,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:37,716 INFO L482 AbstractCegarLoop]: Abstraction has 8705 states and 32369 transitions. [2021-06-05 21:13:37,716 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:37,716 INFO L276 IsEmpty]: Start isEmpty. Operand 8705 states and 32369 transitions. [2021-06-05 21:13:37,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 21:13:37,729 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:37,729 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:37,930 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:37,930 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:37,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:37,930 INFO L82 PathProgramCache]: Analyzing trace with hash 1801149938, now seen corresponding path program 25 times [2021-06-05 21:13:37,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:37,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713913763] [2021-06-05 21:13:37,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:37,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:37,991 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:37,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:37,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713913763] [2021-06-05 21:13:37,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713913763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:37,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846868982] [2021-06-05 21:13:37,991 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:38,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:38,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:13:38,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:38,177 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:38,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846868982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:38,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:38,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 21:13:38,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889113741] [2021-06-05 21:13:38,177 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:13:38,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:38,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:13:38,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:13:38,178 INFO L87 Difference]: Start difference. First operand 8705 states and 32369 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:38,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:38,431 INFO L93 Difference]: Finished difference Result 9134 states and 33615 transitions. [2021-06-05 21:13:38,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:13:38,431 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 21:13:38,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:38,448 INFO L225 Difference]: With dead ends: 9134 [2021-06-05 21:13:38,448 INFO L226 Difference]: Without dead ends: 9104 [2021-06-05 21:13:38,448 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 175.9ms TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:13:38,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9104 states. [2021-06-05 21:13:38,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9104 to 8799. [2021-06-05 21:13:38,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8799 states, 8798 states have (on average 3.7176631052511935) internal successors, (32708), 8798 states have internal predecessors, (32708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:38,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8799 states to 8799 states and 32708 transitions. [2021-06-05 21:13:38,620 INFO L78 Accepts]: Start accepts. Automaton has 8799 states and 32708 transitions. Word has length 27 [2021-06-05 21:13:38,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:38,620 INFO L482 AbstractCegarLoop]: Abstraction has 8799 states and 32708 transitions. [2021-06-05 21:13:38,620 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:38,620 INFO L276 IsEmpty]: Start isEmpty. Operand 8799 states and 32708 transitions. [2021-06-05 21:13:38,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 21:13:38,633 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:38,633 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:38,833 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-06-05 21:13:38,834 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:38,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:38,834 INFO L82 PathProgramCache]: Analyzing trace with hash -181203274, now seen corresponding path program 26 times [2021-06-05 21:13:38,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:38,834 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384948084] [2021-06-05 21:13:38,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:38,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:38,903 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:38,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:38,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384948084] [2021-06-05 21:13:38,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384948084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:38,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954594772] [2021-06-05 21:13:38,903 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:38,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:13:38,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:38,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:13:38,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:39,073 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:39,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954594772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:39,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:39,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 21:13:39,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372173] [2021-06-05 21:13:39,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:13:39,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:39,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:13:39,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:13:39,074 INFO L87 Difference]: Start difference. First operand 8799 states and 32708 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:39,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:39,284 INFO L93 Difference]: Finished difference Result 9600 states and 35001 transitions. [2021-06-05 21:13:39,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:13:39,285 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 21:13:39,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:39,302 INFO L225 Difference]: With dead ends: 9600 [2021-06-05 21:13:39,302 INFO L226 Difference]: Without dead ends: 9541 [2021-06-05 21:13:39,303 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 179.1ms TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:13:39,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9541 states. [2021-06-05 21:13:39,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9541 to 8909. [2021-06-05 21:13:39,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8909 states, 8908 states have (on average 3.7182308037718905) internal successors, (33122), 8908 states have internal predecessors, (33122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:39,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8909 states to 8909 states and 33122 transitions. [2021-06-05 21:13:39,448 INFO L78 Accepts]: Start accepts. Automaton has 8909 states and 33122 transitions. Word has length 27 [2021-06-05 21:13:39,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:39,448 INFO L482 AbstractCegarLoop]: Abstraction has 8909 states and 33122 transitions. [2021-06-05 21:13:39,448 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:39,448 INFO L276 IsEmpty]: Start isEmpty. Operand 8909 states and 33122 transitions. [2021-06-05 21:13:39,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 21:13:39,462 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:39,462 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:39,677 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:39,677 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:39,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:39,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1438887350, now seen corresponding path program 27 times [2021-06-05 21:13:39,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:39,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563338650] [2021-06-05 21:13:39,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:39,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:39,747 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:39,747 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:39,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563338650] [2021-06-05 21:13:39,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563338650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:39,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110822718] [2021-06-05 21:13:39,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:39,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:13:39,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:39,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:13:39,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:40,008 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:40,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110822718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:40,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:40,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 21:13:40,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75901631] [2021-06-05 21:13:40,009 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:13:40,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:40,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:13:40,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:13:40,009 INFO L87 Difference]: Start difference. First operand 8909 states and 33122 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:40,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:40,233 INFO L93 Difference]: Finished difference Result 9517 states and 34885 transitions. [2021-06-05 21:13:40,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:13:40,233 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 21:13:40,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:40,249 INFO L225 Difference]: With dead ends: 9517 [2021-06-05 21:13:40,249 INFO L226 Difference]: Without dead ends: 9477 [2021-06-05 21:13:40,250 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 222.9ms TimeCoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:13:40,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9477 states. [2021-06-05 21:13:40,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9477 to 9103. [2021-06-05 21:13:40,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9103 states, 9102 states have (on average 3.707426939134256) internal successors, (33745), 9102 states have internal predecessors, (33745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:40,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9103 states to 9103 states and 33745 transitions. [2021-06-05 21:13:40,389 INFO L78 Accepts]: Start accepts. Automaton has 9103 states and 33745 transitions. Word has length 27 [2021-06-05 21:13:40,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:40,389 INFO L482 AbstractCegarLoop]: Abstraction has 9103 states and 33745 transitions. [2021-06-05 21:13:40,389 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:40,389 INFO L276 IsEmpty]: Start isEmpty. Operand 9103 states and 33745 transitions. [2021-06-05 21:13:40,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 21:13:40,402 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:40,402 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:40,602 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-05 21:13:40,602 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:40,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:40,603 INFO L82 PathProgramCache]: Analyzing trace with hash -1060302908, now seen corresponding path program 28 times [2021-06-05 21:13:40,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:40,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659846396] [2021-06-05 21:13:40,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:40,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:40,666 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:40,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:40,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659846396] [2021-06-05 21:13:40,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659846396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:40,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051616317] [2021-06-05 21:13:40,667 INFO L93 rtionOrderModulation]: Changing 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) [2021-06-05 21:13:40,696 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:13:40,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:40,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:13:40,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:40,826 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:40,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051616317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:40,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:40,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 21:13:40,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133489501] [2021-06-05 21:13:40,827 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:13:40,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:40,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:13:40,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:13:40,827 INFO L87 Difference]: Start difference. First operand 9103 states and 33745 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:41,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:41,155 INFO L93 Difference]: Finished difference Result 9247 states and 34135 transitions. [2021-06-05 21:13:41,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:13:41,156 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 21:13:41,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:41,171 INFO L225 Difference]: With dead ends: 9247 [2021-06-05 21:13:41,171 INFO L226 Difference]: Without dead ends: 9219 [2021-06-05 21:13:41,171 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 211.0ms TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:13:41,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9219 states. [2021-06-05 21:13:41,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9219 to 9136. [2021-06-05 21:13:41,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9136 states, 9135 states have (on average 3.7056376573617955) internal successors, (33851), 9135 states have internal predecessors, (33851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:41,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9136 states to 9136 states and 33851 transitions. [2021-06-05 21:13:41,294 INFO L78 Accepts]: Start accepts. Automaton has 9136 states and 33851 transitions. Word has length 27 [2021-06-05 21:13:41,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:41,294 INFO L482 AbstractCegarLoop]: Abstraction has 9136 states and 33851 transitions. [2021-06-05 21:13:41,294 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:41,294 INFO L276 IsEmpty]: Start isEmpty. Operand 9136 states and 33851 transitions. [2021-06-05 21:13:41,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 21:13:41,307 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:41,307 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:41,523 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:41,523 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:41,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:41,523 INFO L82 PathProgramCache]: Analyzing trace with hash -1053682256, now seen corresponding path program 29 times [2021-06-05 21:13:41,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:41,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678765312] [2021-06-05 21:13:41,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:41,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:41,587 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:41,588 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:41,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678765312] [2021-06-05 21:13:41,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678765312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:41,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675969469] [2021-06-05 21:13:41,588 INFO L93 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 21:13:41,616 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:13:41,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:41,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:13:41,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:41,759 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:41,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675969469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:41,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:41,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 21:13:41,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369156474] [2021-06-05 21:13:41,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:13:41,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:41,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:13:41,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:13:41,760 INFO L87 Difference]: Start difference. First operand 9136 states and 33851 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:41,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:41,951 INFO L93 Difference]: Finished difference Result 9354 states and 34405 transitions. [2021-06-05 21:13:41,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:13:41,952 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 21:13:41,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:41,967 INFO L225 Difference]: With dead ends: 9354 [2021-06-05 21:13:41,967 INFO L226 Difference]: Without dead ends: 9280 [2021-06-05 21:13:41,967 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 198.4ms TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:13:41,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9280 states. [2021-06-05 21:13:42,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9280 to 9194. [2021-06-05 21:13:42,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9194 states, 9193 states have (on average 3.7022734689437615) internal successors, (34035), 9193 states have internal predecessors, (34035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:42,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9194 states to 9194 states and 34035 transitions. [2021-06-05 21:13:42,128 INFO L78 Accepts]: Start accepts. Automaton has 9194 states and 34035 transitions. Word has length 27 [2021-06-05 21:13:42,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:42,128 INFO L482 AbstractCegarLoop]: Abstraction has 9194 states and 34035 transitions. [2021-06-05 21:13:42,128 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:42,128 INFO L276 IsEmpty]: Start isEmpty. Operand 9194 states and 34035 transitions. [2021-06-05 21:13:42,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 21:13:42,141 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:42,142 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:42,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-05 21:13:42,357 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:42,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:42,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1258931828, now seen corresponding path program 30 times [2021-06-05 21:13:42,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:42,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341675137] [2021-06-05 21:13:42,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:42,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:42,413 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:42,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:42,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341675137] [2021-06-05 21:13:42,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341675137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:42,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192785462] [2021-06-05 21:13:42,413 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:42,455 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:13:42,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:42,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:13:42,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:42,592 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:42,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192785462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:42,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:42,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 21:13:42,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910981] [2021-06-05 21:13:42,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:13:42,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:42,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:13:42,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:13:42,593 INFO L87 Difference]: Start difference. First operand 9194 states and 34035 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:42,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:42,860 INFO L93 Difference]: Finished difference Result 9533 states and 34982 transitions. [2021-06-05 21:13:42,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:13:42,860 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 21:13:42,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:42,877 INFO L225 Difference]: With dead ends: 9533 [2021-06-05 21:13:42,877 INFO L226 Difference]: Without dead ends: 9420 [2021-06-05 21:13:42,878 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 184.6ms TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:13:42,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9420 states. [2021-06-05 21:13:42,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9420 to 9274. [2021-06-05 21:13:42,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9274 states, 9273 states have (on average 3.6988029763830474) internal successors, (34299), 9273 states have internal predecessors, (34299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:43,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9274 states to 9274 states and 34299 transitions. [2021-06-05 21:13:43,004 INFO L78 Accepts]: Start accepts. Automaton has 9274 states and 34299 transitions. Word has length 27 [2021-06-05 21:13:43,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:43,004 INFO L482 AbstractCegarLoop]: Abstraction has 9274 states and 34299 transitions. [2021-06-05 21:13:43,004 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:43,004 INFO L276 IsEmpty]: Start isEmpty. Operand 9274 states and 34299 transitions. [2021-06-05 21:13:43,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 21:13:43,017 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:43,017 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:43,217 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-05 21:13:43,217 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:43,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:43,217 INFO L82 PathProgramCache]: Analyzing trace with hash -17021312, now seen corresponding path program 31 times [2021-06-05 21:13:43,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:43,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134775920] [2021-06-05 21:13:43,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:43,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:43,283 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:43,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:43,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134775920] [2021-06-05 21:13:43,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134775920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:43,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162246907] [2021-06-05 21:13:43,284 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) [2021-06-05 21:13:43,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:43,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:13:43,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:43,537 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:43,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162246907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:43,537 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:43,537 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 21:13:43,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675201249] [2021-06-05 21:13:43,537 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:13:43,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:43,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:13:43,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:13:43,538 INFO L87 Difference]: Start difference. First operand 9274 states and 34299 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:43,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:43,838 INFO L93 Difference]: Finished difference Result 9439 states and 34788 transitions. [2021-06-05 21:13:43,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:13:43,839 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 21:13:43,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:43,856 INFO L225 Difference]: With dead ends: 9439 [2021-06-05 21:13:43,856 INFO L226 Difference]: Without dead ends: 9424 [2021-06-05 21:13:43,857 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 309.5ms TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:13:43,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9424 states. [2021-06-05 21:13:43,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9424 to 9304. [2021-06-05 21:13:43,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9304 states, 9303 states have (on average 3.6990218209179835) internal successors, (34412), 9303 states have internal predecessors, (34412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:44,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9304 states to 9304 states and 34412 transitions. [2021-06-05 21:13:44,018 INFO L78 Accepts]: Start accepts. Automaton has 9304 states and 34412 transitions. Word has length 27 [2021-06-05 21:13:44,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:44,018 INFO L482 AbstractCegarLoop]: Abstraction has 9304 states and 34412 transitions. [2021-06-05 21:13:44,018 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:44,018 INFO L276 IsEmpty]: Start isEmpty. Operand 9304 states and 34412 transitions. [2021-06-05 21:13:44,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 21:13:44,033 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:44,034 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:44,234 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-05 21:13:44,234 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:44,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:44,234 INFO L82 PathProgramCache]: Analyzing trace with hash -533712016, now seen corresponding path program 32 times [2021-06-05 21:13:44,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:44,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861472403] [2021-06-05 21:13:44,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:44,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:44,297 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:44,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:44,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861472403] [2021-06-05 21:13:44,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861472403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:44,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945207506] [2021-06-05 21:13:44,298 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 21:13:44,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:13:44,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:44,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:13:44,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:44,457 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:44,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945207506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:44,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:44,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 21:13:44,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372764337] [2021-06-05 21:13:44,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:13:44,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:44,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:13:44,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:13:44,459 INFO L87 Difference]: Start difference. First operand 9304 states and 34412 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:44,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:44,742 INFO L93 Difference]: Finished difference Result 9649 states and 35346 transitions. [2021-06-05 21:13:44,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:13:44,742 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 21:13:44,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:44,760 INFO L225 Difference]: With dead ends: 9649 [2021-06-05 21:13:44,761 INFO L226 Difference]: Without dead ends: 9561 [2021-06-05 21:13:44,761 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 192.9ms TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:13:44,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9561 states. [2021-06-05 21:13:44,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9561 to 9395. [2021-06-05 21:13:44,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9395 states, 9394 states have (on average 3.6943793911007026) internal successors, (34705), 9394 states have internal predecessors, (34705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:44,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9395 states to 9395 states and 34705 transitions. [2021-06-05 21:13:44,945 INFO L78 Accepts]: Start accepts. Automaton has 9395 states and 34705 transitions. Word has length 27 [2021-06-05 21:13:44,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:44,945 INFO L482 AbstractCegarLoop]: Abstraction has 9395 states and 34705 transitions. [2021-06-05 21:13:44,945 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:44,945 INFO L276 IsEmpty]: Start isEmpty. Operand 9395 states and 34705 transitions. [2021-06-05 21:13:44,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 21:13:44,958 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:44,958 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:45,158 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-06-05 21:13:45,158 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:45,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:45,159 INFO L82 PathProgramCache]: Analyzing trace with hash -339028684, now seen corresponding path program 33 times [2021-06-05 21:13:45,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:45,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497835457] [2021-06-05 21:13:45,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:45,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:45,221 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:45,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:45,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497835457] [2021-06-05 21:13:45,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497835457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:45,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942014949] [2021-06-05 21:13:45,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:45,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 21:13:45,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:45,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:13:45,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:45,390 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:45,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942014949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:45,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:45,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 21:13:45,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876470838] [2021-06-05 21:13:45,390 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:13:45,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:45,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:13:45,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:13:45,391 INFO L87 Difference]: Start difference. First operand 9395 states and 34705 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:45,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:45,633 INFO L93 Difference]: Finished difference Result 9931 states and 36232 transitions. [2021-06-05 21:13:45,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:13:45,633 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 21:13:45,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:45,649 INFO L225 Difference]: With dead ends: 9931 [2021-06-05 21:13:45,649 INFO L226 Difference]: Without dead ends: 9855 [2021-06-05 21:13:45,649 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 208.3ms TimeCoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:13:45,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9855 states. [2021-06-05 21:13:45,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9855 to 9522. [2021-06-05 21:13:45,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9522 states, 9521 states have (on average 3.6922592164688584) internal successors, (35154), 9521 states have internal predecessors, (35154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:45,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9522 states to 9522 states and 35154 transitions. [2021-06-05 21:13:45,779 INFO L78 Accepts]: Start accepts. Automaton has 9522 states and 35154 transitions. Word has length 27 [2021-06-05 21:13:45,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:45,779 INFO L482 AbstractCegarLoop]: Abstraction has 9522 states and 35154 transitions. [2021-06-05 21:13:45,779 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:45,779 INFO L276 IsEmpty]: Start isEmpty. Operand 9522 states and 35154 transitions. [2021-06-05 21:13:45,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 21:13:45,792 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:45,792 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:45,993 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:45,993 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:45,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:45,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1349589500, now seen corresponding path program 34 times [2021-06-05 21:13:45,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:45,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307330989] [2021-06-05 21:13:45,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:45,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:46,045 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:13:46,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:46,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307330989] [2021-06-05 21:13:46,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307330989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:46,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613443696] [2021-06-05 21:13:46,046 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 21:13:46,076 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:13:46,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:46,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:13:46,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:46,200 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:46,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613443696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:46,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:46,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 21:13:46,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151513300] [2021-06-05 21:13:46,201 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:13:46,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:46,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:13:46,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:13:46,201 INFO L87 Difference]: Start difference. First operand 9522 states and 35154 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:46,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:46,475 INFO L93 Difference]: Finished difference Result 9863 states and 36097 transitions. [2021-06-05 21:13:46,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:13:46,475 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 21:13:46,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:46,492 INFO L225 Difference]: With dead ends: 9863 [2021-06-05 21:13:46,492 INFO L226 Difference]: Without dead ends: 9764 [2021-06-05 21:13:46,492 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 182.8ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:13:46,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9764 states. [2021-06-05 21:13:46,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9764 to 9594. [2021-06-05 21:13:46,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9594 states, 9593 states have (on average 3.6910247055144376) internal successors, (35408), 9593 states have internal predecessors, (35408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:46,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9594 states to 9594 states and 35408 transitions. [2021-06-05 21:13:46,623 INFO L78 Accepts]: Start accepts. Automaton has 9594 states and 35408 transitions. Word has length 27 [2021-06-05 21:13:46,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:46,623 INFO L482 AbstractCegarLoop]: Abstraction has 9594 states and 35408 transitions. [2021-06-05 21:13:46,623 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:46,623 INFO L276 IsEmpty]: Start isEmpty. Operand 9594 states and 35408 transitions. [2021-06-05 21:13:46,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 21:13:46,636 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:46,636 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:46,837 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-06-05 21:13:46,837 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:46,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:46,837 INFO L82 PathProgramCache]: Analyzing trace with hash 193536128, now seen corresponding path program 35 times [2021-06-05 21:13:46,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:46,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656398608] [2021-06-05 21:13:46,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:46,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:46,888 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:13:46,888 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:46,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656398608] [2021-06-05 21:13:46,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656398608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:46,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009312571] [2021-06-05 21:13:46,889 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:46,913 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:13:46,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:46,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:13:46,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:47,056 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:47,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009312571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:47,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:47,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 21:13:47,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029491817] [2021-06-05 21:13:47,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:13:47,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:47,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:13:47,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:13:47,057 INFO L87 Difference]: Start difference. First operand 9594 states and 35408 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:47,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:47,326 INFO L93 Difference]: Finished difference Result 10085 states and 36794 transitions. [2021-06-05 21:13:47,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:13:47,326 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 21:13:47,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:47,345 INFO L225 Difference]: With dead ends: 10085 [2021-06-05 21:13:47,346 INFO L226 Difference]: Without dead ends: 10009 [2021-06-05 21:13:47,346 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 182.5ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:13:47,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10009 states. [2021-06-05 21:13:47,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10009 to 9667. [2021-06-05 21:13:47,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9667 states, 9666 states have (on average 3.6887026691495963) internal successors, (35655), 9666 states have internal predecessors, (35655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:47,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9667 states to 9667 states and 35655 transitions. [2021-06-05 21:13:47,493 INFO L78 Accepts]: Start accepts. Automaton has 9667 states and 35655 transitions. Word has length 27 [2021-06-05 21:13:47,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:47,494 INFO L482 AbstractCegarLoop]: Abstraction has 9667 states and 35655 transitions. [2021-06-05 21:13:47,494 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:47,494 INFO L276 IsEmpty]: Start isEmpty. Operand 9667 states and 35655 transitions. [2021-06-05 21:13:47,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 21:13:47,508 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:47,508 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:47,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-06-05 21:13:47,724 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:47,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:47,724 INFO L82 PathProgramCache]: Analyzing trace with hash -143606020, now seen corresponding path program 36 times [2021-06-05 21:13:47,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:47,724 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340338993] [2021-06-05 21:13:47,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:47,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:47,784 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:47,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:47,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340338993] [2021-06-05 21:13:47,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340338993] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:47,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572644098] [2021-06-05 21:13:47,784 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:47,808 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:13:47,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:47,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:13:47,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:47,936 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:47,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572644098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:47,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:47,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 21:13:47,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347838678] [2021-06-05 21:13:47,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:13:47,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:47,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:13:47,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:13:47,971 INFO L87 Difference]: Start difference. First operand 9667 states and 35655 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:48,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:48,179 INFO L93 Difference]: Finished difference Result 10306 states and 37504 transitions. [2021-06-05 21:13:48,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:13:48,179 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 21:13:48,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:48,197 INFO L225 Difference]: With dead ends: 10306 [2021-06-05 21:13:48,197 INFO L226 Difference]: Without dead ends: 10170 [2021-06-05 21:13:48,197 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 151.8ms TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:13:48,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10170 states. [2021-06-05 21:13:48,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10170 to 9815. [2021-06-05 21:13:48,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9815 states, 9814 states have (on average 3.68830242510699) internal successors, (36197), 9814 states have internal predecessors, (36197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:48,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9815 states to 9815 states and 36197 transitions. [2021-06-05 21:13:48,330 INFO L78 Accepts]: Start accepts. Automaton has 9815 states and 36197 transitions. Word has length 27 [2021-06-05 21:13:48,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:48,330 INFO L482 AbstractCegarLoop]: Abstraction has 9815 states and 36197 transitions. [2021-06-05 21:13:48,330 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:48,330 INFO L276 IsEmpty]: Start isEmpty. Operand 9815 states and 36197 transitions. [2021-06-05 21:13:48,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 21:13:48,343 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:48,343 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:48,543 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:48,544 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:48,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:48,544 INFO L82 PathProgramCache]: Analyzing trace with hash -2109020860, now seen corresponding path program 37 times [2021-06-05 21:13:48,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:48,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271744734] [2021-06-05 21:13:48,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:48,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:48,602 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:48,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:48,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271744734] [2021-06-05 21:13:48,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271744734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:48,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532899961] [2021-06-05 21:13:48,603 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:48,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:48,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:13:48,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:48,766 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:48,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532899961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:48,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:48,767 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 21:13:48,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339204885] [2021-06-05 21:13:48,767 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:13:48,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:48,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:13:48,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:13:48,767 INFO L87 Difference]: Start difference. First operand 9815 states and 36197 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:48,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:48,997 INFO L93 Difference]: Finished difference Result 10112 states and 36984 transitions. [2021-06-05 21:13:48,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:13:48,997 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 21:13:48,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:49,015 INFO L225 Difference]: With dead ends: 10112 [2021-06-05 21:13:49,015 INFO L226 Difference]: Without dead ends: 10046 [2021-06-05 21:13:49,015 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 152.9ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:13:49,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10046 states. [2021-06-05 21:13:49,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10046 to 9840. [2021-06-05 21:13:49,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9840 states, 9839 states have (on average 3.6888911474743367) internal successors, (36295), 9839 states have internal predecessors, (36295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:49,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9840 states to 9840 states and 36295 transitions. [2021-06-05 21:13:49,148 INFO L78 Accepts]: Start accepts. Automaton has 9840 states and 36295 transitions. Word has length 27 [2021-06-05 21:13:49,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:49,148 INFO L482 AbstractCegarLoop]: Abstraction has 9840 states and 36295 transitions. [2021-06-05 21:13:49,148 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:49,148 INFO L276 IsEmpty]: Start isEmpty. Operand 9840 states and 36295 transitions. [2021-06-05 21:13:49,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 21:13:49,162 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:49,162 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:49,362 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-06-05 21:13:49,362 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:49,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:49,362 INFO L82 PathProgramCache]: Analyzing trace with hash -1641622004, now seen corresponding path program 38 times [2021-06-05 21:13:49,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:49,363 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486862516] [2021-06-05 21:13:49,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:49,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:49,414 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:49,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:49,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486862516] [2021-06-05 21:13:49,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486862516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:49,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963808904] [2021-06-05 21:13:49,415 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:49,439 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:13:49,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:49,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:13:49,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:49,573 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:49,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963808904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:49,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:49,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 21:13:49,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202262769] [2021-06-05 21:13:49,573 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:13:49,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:49,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:13:49,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:13:49,574 INFO L87 Difference]: Start difference. First operand 9840 states and 36295 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:49,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:49,878 INFO L93 Difference]: Finished difference Result 10217 states and 37368 transitions. [2021-06-05 21:13:49,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:13:49,878 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 21:13:49,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:49,900 INFO L225 Difference]: With dead ends: 10217 [2021-06-05 21:13:49,900 INFO L226 Difference]: Without dead ends: 10187 [2021-06-05 21:13:49,900 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 182.0ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:13:49,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10187 states. [2021-06-05 21:13:50,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10187 to 9872. [2021-06-05 21:13:50,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9872 states, 9871 states have (on average 3.690102319927059) internal successors, (36425), 9871 states have internal predecessors, (36425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:50,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9872 states to 9872 states and 36425 transitions. [2021-06-05 21:13:50,086 INFO L78 Accepts]: Start accepts. Automaton has 9872 states and 36425 transitions. Word has length 27 [2021-06-05 21:13:50,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:50,086 INFO L482 AbstractCegarLoop]: Abstraction has 9872 states and 36425 transitions. [2021-06-05 21:13:50,086 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:50,086 INFO L276 IsEmpty]: Start isEmpty. Operand 9872 states and 36425 transitions. [2021-06-05 21:13:50,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 21:13:50,102 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:50,103 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:50,303 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:50,303 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:50,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:50,304 INFO L82 PathProgramCache]: Analyzing trace with hash -776405308, now seen corresponding path program 39 times [2021-06-05 21:13:50,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:50,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278564209] [2021-06-05 21:13:50,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:50,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:50,360 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:13:50,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:50,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278564209] [2021-06-05 21:13:50,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278564209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:50,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700484547] [2021-06-05 21:13:50,361 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:50,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:13:50,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:50,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:13:50,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:50,531 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:50,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700484547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:50,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:50,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 21:13:50,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877847783] [2021-06-05 21:13:50,531 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:13:50,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:50,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:13:50,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:13:50,532 INFO L87 Difference]: Start difference. First operand 9872 states and 36425 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:50,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:50,745 INFO L93 Difference]: Finished difference Result 10876 states and 39384 transitions. [2021-06-05 21:13:50,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:13:50,746 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 21:13:50,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:50,765 INFO L225 Difference]: With dead ends: 10876 [2021-06-05 21:13:50,766 INFO L226 Difference]: Without dead ends: 10826 [2021-06-05 21:13:50,766 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 158.3ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:13:50,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10826 states. [2021-06-05 21:13:50,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10826 to 10058. [2021-06-05 21:13:50,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10058 states, 10057 states have (on average 3.69424281594909) internal successors, (37153), 10057 states have internal predecessors, (37153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:50,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10058 states to 10058 states and 37153 transitions. [2021-06-05 21:13:50,926 INFO L78 Accepts]: Start accepts. Automaton has 10058 states and 37153 transitions. Word has length 27 [2021-06-05 21:13:50,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:50,926 INFO L482 AbstractCegarLoop]: Abstraction has 10058 states and 37153 transitions. [2021-06-05 21:13:50,927 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:50,927 INFO L276 IsEmpty]: Start isEmpty. Operand 10058 states and 37153 transitions. [2021-06-05 21:13:50,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 21:13:50,940 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:50,940 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:51,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-06-05 21:13:51,140 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:51,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:51,141 INFO L82 PathProgramCache]: Analyzing trace with hash 288417660, now seen corresponding path program 40 times [2021-06-05 21:13:51,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:51,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264341791] [2021-06-05 21:13:51,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:51,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:51,186 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:51,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:51,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264341791] [2021-06-05 21:13:51,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264341791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:51,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781856041] [2021-06-05 21:13:51,186 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:51,214 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:13:51,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:51,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:13:51,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:51,347 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:51,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781856041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:51,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:51,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 21:13:51,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580642117] [2021-06-05 21:13:51,348 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:13:51,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:51,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:13:51,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:13:51,349 INFO L87 Difference]: Start difference. First operand 10058 states and 37153 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:51,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:51,558 INFO L93 Difference]: Finished difference Result 10555 states and 38575 transitions. [2021-06-05 21:13:51,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:13:51,558 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 21:13:51,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:51,576 INFO L225 Difference]: With dead ends: 10555 [2021-06-05 21:13:51,577 INFO L226 Difference]: Without dead ends: 10525 [2021-06-05 21:13:51,577 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 139.6ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:13:51,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10525 states. [2021-06-05 21:13:51,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10525 to 10155. [2021-06-05 21:13:51,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10155 states, 10154 states have (on average 3.6938152452235573) internal successors, (37507), 10154 states have internal predecessors, (37507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:51,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10155 states to 10155 states and 37507 transitions. [2021-06-05 21:13:51,723 INFO L78 Accepts]: Start accepts. Automaton has 10155 states and 37507 transitions. Word has length 27 [2021-06-05 21:13:51,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:51,723 INFO L482 AbstractCegarLoop]: Abstraction has 10155 states and 37507 transitions. [2021-06-05 21:13:51,723 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:51,723 INFO L276 IsEmpty]: Start isEmpty. Operand 10155 states and 37507 transitions. [2021-06-05 21:13:51,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 21:13:51,737 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:51,737 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:51,938 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-05 21:13:51,938 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:51,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:51,938 INFO L82 PathProgramCache]: Analyzing trace with hash 1717656832, now seen corresponding path program 41 times [2021-06-05 21:13:51,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:51,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101564757] [2021-06-05 21:13:51,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:51,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:52,003 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:52,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:52,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101564757] [2021-06-05 21:13:52,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101564757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:52,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143355746] [2021-06-05 21:13:52,003 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:52,027 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:13:52,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:52,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:13:52,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:52,204 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:52,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143355746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:52,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:52,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 21:13:52,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672499211] [2021-06-05 21:13:52,204 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:13:52,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:52,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:13:52,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:13:52,205 INFO L87 Difference]: Start difference. First operand 10155 states and 37507 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:52,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:52,419 INFO L93 Difference]: Finished difference Result 10625 states and 38849 transitions. [2021-06-05 21:13:52,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:13:52,419 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 21:13:52,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:52,439 INFO L225 Difference]: With dead ends: 10625 [2021-06-05 21:13:52,439 INFO L226 Difference]: Without dead ends: 10529 [2021-06-05 21:13:52,439 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 205.6ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:13:52,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10529 states. [2021-06-05 21:13:52,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10529 to 10297. [2021-06-05 21:13:52,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10297 states, 10296 states have (on average 3.6916278166278165) internal successors, (38009), 10296 states have internal predecessors, (38009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:52,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10297 states to 10297 states and 38009 transitions. [2021-06-05 21:13:52,591 INFO L78 Accepts]: Start accepts. Automaton has 10297 states and 38009 transitions. Word has length 27 [2021-06-05 21:13:52,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:52,591 INFO L482 AbstractCegarLoop]: Abstraction has 10297 states and 38009 transitions. [2021-06-05 21:13:52,591 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:52,591 INFO L276 IsEmpty]: Start isEmpty. Operand 10297 states and 38009 transitions. [2021-06-05 21:13:52,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 21:13:52,606 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:52,606 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:52,806 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-05 21:13:52,806 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:52,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:52,807 INFO L82 PathProgramCache]: Analyzing trace with hash 795869124, now seen corresponding path program 42 times [2021-06-05 21:13:52,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:52,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406229934] [2021-06-05 21:13:52,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:52,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:52,865 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:52,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:52,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406229934] [2021-06-05 21:13:52,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406229934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:52,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191567538] [2021-06-05 21:13:52,866 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:52,893 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:13:52,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:52,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:13:52,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:53,027 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:53,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191567538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:53,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:53,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 21:13:53,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594687672] [2021-06-05 21:13:53,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:13:53,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:53,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:13:53,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:13:53,028 INFO L87 Difference]: Start difference. First operand 10297 states and 38009 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:53,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:53,278 INFO L93 Difference]: Finished difference Result 11674 states and 42186 transitions. [2021-06-05 21:13:53,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:13:53,278 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 21:13:53,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:53,299 INFO L225 Difference]: With dead ends: 11674 [2021-06-05 21:13:53,300 INFO L226 Difference]: Without dead ends: 11640 [2021-06-05 21:13:53,300 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 158.1ms TimeCoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:13:53,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11640 states. [2021-06-05 21:13:53,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11640 to 10557. [2021-06-05 21:13:53,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10557 states, 10556 states have (on average 3.6996968548692686) internal successors, (39054), 10556 states have internal predecessors, (39054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:53,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10557 states to 10557 states and 39054 transitions. [2021-06-05 21:13:53,461 INFO L78 Accepts]: Start accepts. Automaton has 10557 states and 39054 transitions. Word has length 27 [2021-06-05 21:13:53,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:53,461 INFO L482 AbstractCegarLoop]: Abstraction has 10557 states and 39054 transitions. [2021-06-05 21:13:53,462 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:53,462 INFO L276 IsEmpty]: Start isEmpty. Operand 10557 states and 39054 transitions. [2021-06-05 21:13:53,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 21:13:53,477 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:53,477 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:53,677 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-06-05 21:13:53,677 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:53,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:53,678 INFO L82 PathProgramCache]: Analyzing trace with hash -1324830332, now seen corresponding path program 43 times [2021-06-05 21:13:53,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:53,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700185830] [2021-06-05 21:13:53,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:53,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:53,751 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:53,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:53,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700185830] [2021-06-05 21:13:53,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700185830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:53,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127552141] [2021-06-05 21:13:53,752 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:53,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:53,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:13:53,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:53,909 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:53,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127552141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:53,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:53,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 21:13:53,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103353474] [2021-06-05 21:13:53,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:13:53,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:53,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:13:53,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:13:53,910 INFO L87 Difference]: Start difference. First operand 10557 states and 39054 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:54,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:54,154 INFO L93 Difference]: Finished difference Result 10738 states and 39591 transitions. [2021-06-05 21:13:54,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:13:54,154 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 21:13:54,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:54,174 INFO L225 Difference]: With dead ends: 10738 [2021-06-05 21:13:54,174 INFO L226 Difference]: Without dead ends: 10723 [2021-06-05 21:13:54,174 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 189.7ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:13:54,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10723 states. [2021-06-05 21:13:54,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10723 to 10592. [2021-06-05 21:13:54,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10592 states, 10591 states have (on average 3.6990841280332356) internal successors, (39177), 10591 states have internal predecessors, (39177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:54,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10592 states to 10592 states and 39177 transitions. [2021-06-05 21:13:54,390 INFO L78 Accepts]: Start accepts. Automaton has 10592 states and 39177 transitions. Word has length 27 [2021-06-05 21:13:54,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:54,390 INFO L482 AbstractCegarLoop]: Abstraction has 10592 states and 39177 transitions. [2021-06-05 21:13:54,390 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:54,390 INFO L276 IsEmpty]: Start isEmpty. Operand 10592 states and 39177 transitions. [2021-06-05 21:13:54,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 21:13:54,405 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:54,405 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:54,606 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:54,606 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:54,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:54,606 INFO L82 PathProgramCache]: Analyzing trace with hash -1318209680, now seen corresponding path program 44 times [2021-06-05 21:13:54,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:54,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351475177] [2021-06-05 21:13:54,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:54,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:54,670 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:54,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:54,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351475177] [2021-06-05 21:13:54,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351475177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:54,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430942612] [2021-06-05 21:13:54,671 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:54,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:13:54,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:54,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:13:54,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:54,829 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:54,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430942612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:54,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:54,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 21:13:54,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188797048] [2021-06-05 21:13:54,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:13:54,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:54,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:13:54,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:13:54,830 INFO L87 Difference]: Start difference. First operand 10592 states and 39177 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:55,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:55,026 INFO L93 Difference]: Finished difference Result 11042 states and 40414 transitions. [2021-06-05 21:13:55,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:13:55,026 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 21:13:55,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:55,045 INFO L225 Difference]: With dead ends: 11042 [2021-06-05 21:13:55,045 INFO L226 Difference]: Without dead ends: 10965 [2021-06-05 21:13:55,045 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 158.7ms TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:13:55,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10965 states. [2021-06-05 21:13:55,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10965 to 10686. [2021-06-05 21:13:55,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10686 states, 10685 states have (on average 3.6966775854000935) internal successors, (39499), 10685 states have internal predecessors, (39499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:55,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10686 states to 10686 states and 39499 transitions. [2021-06-05 21:13:55,216 INFO L78 Accepts]: Start accepts. Automaton has 10686 states and 39499 transitions. Word has length 27 [2021-06-05 21:13:55,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:55,216 INFO L482 AbstractCegarLoop]: Abstraction has 10686 states and 39499 transitions. [2021-06-05 21:13:55,216 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:55,216 INFO L276 IsEmpty]: Start isEmpty. Operand 10686 states and 39499 transitions. [2021-06-05 21:13:55,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 21:13:55,232 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:55,232 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:55,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-06-05 21:13:55,432 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:55,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:55,432 INFO L82 PathProgramCache]: Analyzing trace with hash 994404404, now seen corresponding path program 45 times [2021-06-05 21:13:55,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:55,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004331901] [2021-06-05 21:13:55,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:55,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:55,493 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:55,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:55,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004331901] [2021-06-05 21:13:55,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004331901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:55,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896642794] [2021-06-05 21:13:55,494 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:55,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:13:55,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:55,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:13:55,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:55,654 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:55,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896642794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:55,654 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:55,654 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 21:13:55,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162999058] [2021-06-05 21:13:55,654 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:13:55,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:55,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:13:55,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:13:55,655 INFO L87 Difference]: Start difference. First operand 10686 states and 39499 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:55,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:55,897 INFO L93 Difference]: Finished difference Result 11185 states and 40920 transitions. [2021-06-05 21:13:55,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:13:55,897 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 21:13:55,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:55,917 INFO L225 Difference]: With dead ends: 11185 [2021-06-05 21:13:55,917 INFO L226 Difference]: Without dead ends: 11145 [2021-06-05 21:13:55,917 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 165.3ms TimeCoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:13:55,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11145 states. [2021-06-05 21:13:56,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11145 to 10743. [2021-06-05 21:13:56,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10743 states, 10742 states have (on average 3.6983801899087694) internal successors, (39728), 10742 states have internal predecessors, (39728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:56,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10743 states to 10743 states and 39728 transitions. [2021-06-05 21:13:56,071 INFO L78 Accepts]: Start accepts. Automaton has 10743 states and 39728 transitions. Word has length 27 [2021-06-05 21:13:56,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:56,071 INFO L482 AbstractCegarLoop]: Abstraction has 10743 states and 39728 transitions. [2021-06-05 21:13:56,071 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:56,071 INFO L276 IsEmpty]: Start isEmpty. Operand 10743 states and 39728 transitions. [2021-06-05 21:13:56,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 21:13:56,085 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:56,085 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:56,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:56,286 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:56,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:56,286 INFO L82 PathProgramCache]: Analyzing trace with hash -281548736, now seen corresponding path program 46 times [2021-06-05 21:13:56,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:56,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842184510] [2021-06-05 21:13:56,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:56,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:56,352 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:56,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:56,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842184510] [2021-06-05 21:13:56,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842184510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:56,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726606609] [2021-06-05 21:13:56,353 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:56,378 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:13:56,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:56,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:13:56,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:56,520 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:56,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726606609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:56,521 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:56,521 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 21:13:56,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218039209] [2021-06-05 21:13:56,521 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:13:56,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:56,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:13:56,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:13:56,521 INFO L87 Difference]: Start difference. First operand 10743 states and 39728 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:56,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:56,795 INFO L93 Difference]: Finished difference Result 10899 states and 40153 transitions. [2021-06-05 21:13:56,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:13:56,796 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 21:13:56,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:56,813 INFO L225 Difference]: With dead ends: 10899 [2021-06-05 21:13:56,814 INFO L226 Difference]: Without dead ends: 10871 [2021-06-05 21:13:56,814 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 193.2ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:13:56,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10871 states. [2021-06-05 21:13:56,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10871 to 10760. [2021-06-05 21:13:56,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10760 states, 10759 states have (on average 3.698299098429222) internal successors, (39790), 10759 states have internal predecessors, (39790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:56,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10760 states to 10760 states and 39790 transitions. [2021-06-05 21:13:56,959 INFO L78 Accepts]: Start accepts. Automaton has 10760 states and 39790 transitions. Word has length 27 [2021-06-05 21:13:56,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:56,959 INFO L482 AbstractCegarLoop]: Abstraction has 10760 states and 39790 transitions. [2021-06-05 21:13:56,959 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:56,959 INFO L276 IsEmpty]: Start isEmpty. Operand 10760 states and 39790 transitions. [2021-06-05 21:13:56,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 21:13:56,975 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:56,975 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:57,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-06-05 21:13:57,177 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:57,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:57,177 INFO L82 PathProgramCache]: Analyzing trace with hash -798239440, now seen corresponding path program 47 times [2021-06-05 21:13:57,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:57,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575999564] [2021-06-05 21:13:57,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:57,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:57,233 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:57,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:57,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575999564] [2021-06-05 21:13:57,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575999564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:57,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379649557] [2021-06-05 21:13:57,233 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:57,268 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:13:57,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:57,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:13:57,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:57,380 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:57,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379649557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:57,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:57,381 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 21:13:57,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931149947] [2021-06-05 21:13:57,382 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:13:57,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:57,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:13:57,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:13:57,382 INFO L87 Difference]: Start difference. First operand 10760 states and 39790 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:57,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:57,547 INFO L93 Difference]: Finished difference Result 11018 states and 40428 transitions. [2021-06-05 21:13:57,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:13:57,548 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 21:13:57,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:57,569 INFO L225 Difference]: With dead ends: 11018 [2021-06-05 21:13:57,569 INFO L226 Difference]: Without dead ends: 10908 [2021-06-05 21:13:57,570 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 146.2ms TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:13:57,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10908 states. [2021-06-05 21:13:57,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10908 to 10812. [2021-06-05 21:13:57,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10812 states, 10811 states have (on average 3.696790306169642) internal successors, (39966), 10811 states have internal predecessors, (39966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:57,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10812 states to 10812 states and 39966 transitions. [2021-06-05 21:13:57,723 INFO L78 Accepts]: Start accepts. Automaton has 10812 states and 39966 transitions. Word has length 27 [2021-06-05 21:13:57,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:57,723 INFO L482 AbstractCegarLoop]: Abstraction has 10812 states and 39966 transitions. [2021-06-05 21:13:57,723 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:57,723 INFO L276 IsEmpty]: Start isEmpty. Operand 10812 states and 39966 transitions. [2021-06-05 21:13:57,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 21:13:57,738 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:57,738 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:57,938 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-06-05 21:13:57,938 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:57,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:57,939 INFO L82 PathProgramCache]: Analyzing trace with hash -603556108, now seen corresponding path program 48 times [2021-06-05 21:13:57,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:57,939 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066056548] [2021-06-05 21:13:57,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:57,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:58,006 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:58,006 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:58,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066056548] [2021-06-05 21:13:58,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066056548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:58,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114120037] [2021-06-05 21:13:58,006 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:58,125 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:13:58,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:58,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:13:58,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:58,262 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:58,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114120037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:58,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:58,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 21:13:58,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689713262] [2021-06-05 21:13:58,262 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:13:58,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:58,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:13:58,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:13:58,263 INFO L87 Difference]: Start difference. First operand 10812 states and 39966 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:58,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:58,547 INFO L93 Difference]: Finished difference Result 11294 states and 41303 transitions. [2021-06-05 21:13:58,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:13:58,548 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 21:13:58,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:58,569 INFO L225 Difference]: With dead ends: 11294 [2021-06-05 21:13:58,570 INFO L226 Difference]: Without dead ends: 11195 [2021-06-05 21:13:58,570 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 187.2ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:13:58,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11195 states. [2021-06-05 21:13:58,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11195 to 10917. [2021-06-05 21:13:58,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10917 states, 10916 states have (on average 3.6943019421033347) internal successors, (40327), 10916 states have internal predecessors, (40327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:58,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10917 states to 10917 states and 40327 transitions. [2021-06-05 21:13:58,735 INFO L78 Accepts]: Start accepts. Automaton has 10917 states and 40327 transitions. Word has length 27 [2021-06-05 21:13:58,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:58,736 INFO L482 AbstractCegarLoop]: Abstraction has 10917 states and 40327 transitions. [2021-06-05 21:13:58,736 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:58,736 INFO L276 IsEmpty]: Start isEmpty. Operand 10917 states and 40327 transitions. [2021-06-05 21:13:58,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 21:13:58,752 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:58,752 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:58,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:58,952 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:58,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:58,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1085062076, now seen corresponding path program 49 times [2021-06-05 21:13:58,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:58,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447616006] [2021-06-05 21:13:58,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:58,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:59,007 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:13:59,007 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:59,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447616006] [2021-06-05 21:13:59,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447616006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:59,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216476110] [2021-06-05 21:13:59,007 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:59,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:59,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:13:59,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:59,162 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:59,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216476110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:59,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:59,163 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 21:13:59,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038094683] [2021-06-05 21:13:59,163 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:13:59,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:59,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:13:59,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:13:59,163 INFO L87 Difference]: Start difference. First operand 10917 states and 40327 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:59,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:59,455 INFO L93 Difference]: Finished difference Result 11367 states and 41606 transitions. [2021-06-05 21:13:59,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:13:59,456 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 21:13:59,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:59,481 INFO L225 Difference]: With dead ends: 11367 [2021-06-05 21:13:59,481 INFO L226 Difference]: Without dead ends: 11337 [2021-06-05 21:13:59,481 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 140.4ms TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:13:59,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11337 states. [2021-06-05 21:13:59,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11337 to 10979. [2021-06-05 21:13:59,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10979 states, 10978 states have (on average 3.69484423392239) internal successors, (40562), 10978 states have internal predecessors, (40562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:59,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10979 states to 10979 states and 40562 transitions. [2021-06-05 21:13:59,693 INFO L78 Accepts]: Start accepts. Automaton has 10979 states and 40562 transitions. Word has length 27 [2021-06-05 21:13:59,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:59,693 INFO L482 AbstractCegarLoop]: Abstraction has 10979 states and 40562 transitions. [2021-06-05 21:13:59,694 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:59,694 INFO L276 IsEmpty]: Start isEmpty. Operand 10979 states and 40562 transitions. [2021-06-05 21:13:59,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 21:13:59,710 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:59,710 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:59,911 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-06-05 21:13:59,912 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:59,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:59,912 INFO L82 PathProgramCache]: Analyzing trace with hash -70991296, now seen corresponding path program 50 times [2021-06-05 21:13:59,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:59,912 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023601673] [2021-06-05 21:13:59,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:59,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:59,969 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:13:59,969 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:59,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023601673] [2021-06-05 21:13:59,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023601673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:59,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360684005] [2021-06-05 21:13:59,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:00,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:14:00,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:14:00,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:14:00,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:00,130 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:00,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360684005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:00,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:00,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 21:14:00,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367898013] [2021-06-05 21:14:00,130 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:14:00,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:00,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:14:00,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:14:00,131 INFO L87 Difference]: Start difference. First operand 10979 states and 40562 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:00,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:00,322 INFO L93 Difference]: Finished difference Result 11407 states and 41736 transitions. [2021-06-05 21:14:00,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:14:00,322 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 21:14:00,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:00,342 INFO L225 Difference]: With dead ends: 11407 [2021-06-05 21:14:00,342 INFO L226 Difference]: Without dead ends: 11315 [2021-06-05 21:14:00,343 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 139.5ms TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:14:00,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11315 states. [2021-06-05 21:14:00,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11315 to 11054. [2021-06-05 21:14:00,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11054 states, 11053 states have (on average 3.694743508549715) internal successors, (40838), 11053 states have internal predecessors, (40838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:00,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11054 states to 11054 states and 40838 transitions. [2021-06-05 21:14:00,511 INFO L78 Accepts]: Start accepts. Automaton has 11054 states and 40838 transitions. Word has length 27 [2021-06-05 21:14:00,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:00,511 INFO L482 AbstractCegarLoop]: Abstraction has 11054 states and 40838 transitions. [2021-06-05 21:14:00,512 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:00,512 INFO L276 IsEmpty]: Start isEmpty. Operand 11054 states and 40838 transitions. [2021-06-05 21:14:00,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 21:14:00,529 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:00,529 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:00,729 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-06-05 21:14:00,729 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:00,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:00,730 INFO L82 PathProgramCache]: Analyzing trace with hash 993593664, now seen corresponding path program 51 times [2021-06-05 21:14:00,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:00,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324831466] [2021-06-05 21:14:00,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:00,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:00,798 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:00,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:00,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324831466] [2021-06-05 21:14:00,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324831466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:00,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309069192] [2021-06-05 21:14:00,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:00,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:14:00,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:14:00,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:14:00,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:00,985 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:00,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309069192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:00,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:00,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 21:14:00,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175042557] [2021-06-05 21:14:00,985 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:14:00,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:00,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:14:00,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:14:00,986 INFO L87 Difference]: Start difference. First operand 11054 states and 40838 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:01,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:01,265 INFO L93 Difference]: Finished difference Result 11235 states and 41375 transitions. [2021-06-05 21:14:01,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:14:01,266 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 21:14:01,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:01,284 INFO L225 Difference]: With dead ends: 11235 [2021-06-05 21:14:01,284 INFO L226 Difference]: Without dead ends: 11220 [2021-06-05 21:14:01,284 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 177.7ms TimeCoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:14:01,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11220 states. [2021-06-05 21:14:01,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11220 to 11078. [2021-06-05 21:14:01,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11078 states, 11077 states have (on average 3.6932382414011014) internal successors, (40910), 11077 states have internal predecessors, (40910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:01,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11078 states to 11078 states and 40910 transitions. [2021-06-05 21:14:01,436 INFO L78 Accepts]: Start accepts. Automaton has 11078 states and 40910 transitions. Word has length 27 [2021-06-05 21:14:01,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:01,436 INFO L482 AbstractCegarLoop]: Abstraction has 11078 states and 40910 transitions. [2021-06-05 21:14:01,436 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:01,436 INFO L276 IsEmpty]: Start isEmpty. Operand 11078 states and 40910 transitions. [2021-06-05 21:14:01,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 21:14:01,451 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:01,451 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:01,651 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-06-05 21:14:01,651 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:01,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:01,652 INFO L82 PathProgramCache]: Analyzing trace with hash 476902960, now seen corresponding path program 52 times [2021-06-05 21:14:01,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:01,652 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358474000] [2021-06-05 21:14:01,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:01,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:01,724 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:01,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:01,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358474000] [2021-06-05 21:14:01,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358474000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:01,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178007495] [2021-06-05 21:14:01,724 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:01,748 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:14:01,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:14:01,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:14:01,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:01,881 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:01,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178007495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:01,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:01,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 21:14:01,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925188817] [2021-06-05 21:14:01,881 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:14:01,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:01,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:14:01,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:14:01,882 INFO L87 Difference]: Start difference. First operand 11078 states and 40910 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:02,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:02,131 INFO L93 Difference]: Finished difference Result 11379 states and 41715 transitions. [2021-06-05 21:14:02,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:14:02,132 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 21:14:02,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:02,154 INFO L225 Difference]: With dead ends: 11379 [2021-06-05 21:14:02,154 INFO L226 Difference]: Without dead ends: 11313 [2021-06-05 21:14:02,154 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 150.7ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:14:02,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11313 states. [2021-06-05 21:14:02,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11313 to 11126. [2021-06-05 21:14:02,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11126 states, 11125 states have (on average 3.6934831460674156) internal successors, (41090), 11125 states have internal predecessors, (41090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:02,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11126 states to 11126 states and 41090 transitions. [2021-06-05 21:14:02,340 INFO L78 Accepts]: Start accepts. Automaton has 11126 states and 41090 transitions. Word has length 27 [2021-06-05 21:14:02,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:02,340 INFO L482 AbstractCegarLoop]: Abstraction has 11126 states and 41090 transitions. [2021-06-05 21:14:02,340 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:02,340 INFO L276 IsEmpty]: Start isEmpty. Operand 11126 states and 41090 transitions. [2021-06-05 21:14:02,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 21:14:02,355 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:02,355 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:02,555 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:02,555 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:02,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:02,556 INFO L82 PathProgramCache]: Analyzing trace with hash 671586292, now seen corresponding path program 53 times [2021-06-05 21:14:02,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:02,556 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72917879] [2021-06-05 21:14:02,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:02,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:02,629 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:02,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:02,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72917879] [2021-06-05 21:14:02,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72917879] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:02,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787431779] [2021-06-05 21:14:02,629 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:02,668 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:14:02,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:14:02,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:14:02,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:02,799 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:02,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787431779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:02,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:02,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 21:14:02,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199395538] [2021-06-05 21:14:02,800 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:14:02,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:02,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:14:02,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:14:02,800 INFO L87 Difference]: Start difference. First operand 11126 states and 41090 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:03,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:03,078 INFO L93 Difference]: Finished difference Result 11510 states and 42198 transitions. [2021-06-05 21:14:03,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:14:03,078 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 21:14:03,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:03,098 INFO L225 Difference]: With dead ends: 11510 [2021-06-05 21:14:03,099 INFO L226 Difference]: Without dead ends: 11480 [2021-06-05 21:14:03,099 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 165.2ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:14:03,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11480 states. [2021-06-05 21:14:03,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11480 to 11156. [2021-06-05 21:14:03,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11156 states, 11155 states have (on average 3.696100403406544) internal successors, (41230), 11155 states have internal predecessors, (41230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:03,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11156 states to 11156 states and 41230 transitions. [2021-06-05 21:14:03,262 INFO L78 Accepts]: Start accepts. Automaton has 11156 states and 41230 transitions. Word has length 27 [2021-06-05 21:14:03,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:03,262 INFO L482 AbstractCegarLoop]: Abstraction has 11156 states and 41230 transitions. [2021-06-05 21:14:03,262 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:03,262 INFO L276 IsEmpty]: Start isEmpty. Operand 11156 states and 41230 transitions. [2021-06-05 21:14:03,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 21:14:03,276 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:03,276 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:03,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:03,477 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:03,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:03,477 INFO L82 PathProgramCache]: Analyzing trace with hash 941151852, now seen corresponding path program 54 times [2021-06-05 21:14:03,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:03,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450607398] [2021-06-05 21:14:03,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:03,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:03,551 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:03,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:03,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450607398] [2021-06-05 21:14:03,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450607398] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:03,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839080349] [2021-06-05 21:14:03,552 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:03,579 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:14:03,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:14:03,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:14:03,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:03,700 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:03,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839080349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:03,701 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:03,701 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 21:14:03,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854547535] [2021-06-05 21:14:03,701 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:14:03,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:03,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:14:03,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:14:03,701 INFO L87 Difference]: Start difference. First operand 11156 states and 41230 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:03,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:03,930 INFO L93 Difference]: Finished difference Result 11580 states and 42454 transitions. [2021-06-05 21:14:03,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:14:03,931 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 21:14:03,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:03,951 INFO L225 Difference]: With dead ends: 11580 [2021-06-05 21:14:03,951 INFO L226 Difference]: Without dead ends: 11550 [2021-06-05 21:14:03,951 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 147.6ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:14:03,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11550 states. [2021-06-05 21:14:04,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11550 to 11232. [2021-06-05 21:14:04,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11232 states, 11231 states have (on average 3.6960199447956548) internal successors, (41510), 11231 states have internal predecessors, (41510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:04,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11232 states to 11232 states and 41510 transitions. [2021-06-05 21:14:04,115 INFO L78 Accepts]: Start accepts. Automaton has 11232 states and 41510 transitions. Word has length 27 [2021-06-05 21:14:04,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:04,115 INFO L482 AbstractCegarLoop]: Abstraction has 11232 states and 41510 transitions. [2021-06-05 21:14:04,115 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:04,115 INFO L276 IsEmpty]: Start isEmpty. Operand 11232 states and 41510 transitions. [2021-06-05 21:14:04,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 21:14:04,131 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:04,131 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:04,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:04,345 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:04,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:04,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1135835184, now seen corresponding path program 55 times [2021-06-05 21:14:04,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:04,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435019905] [2021-06-05 21:14:04,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:04,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:04,408 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:04,408 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:04,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435019905] [2021-06-05 21:14:04,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435019905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:04,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766468451] [2021-06-05 21:14:04,409 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:04,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:04,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:14:04,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:04,577 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:04,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766468451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:04,577 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:04,577 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 21:14:04,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318678354] [2021-06-05 21:14:04,577 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:14:04,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:04,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:14:04,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:14:04,578 INFO L87 Difference]: Start difference. First operand 11232 states and 41510 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:04,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:04,813 INFO L93 Difference]: Finished difference Result 11545 states and 42403 transitions. [2021-06-05 21:14:04,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:14:04,813 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 21:14:04,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:04,833 INFO L225 Difference]: With dead ends: 11545 [2021-06-05 21:14:04,833 INFO L226 Difference]: Without dead ends: 11507 [2021-06-05 21:14:04,833 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 152.3ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:14:04,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11507 states. [2021-06-05 21:14:05,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11507 to 11272. [2021-06-05 21:14:05,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11272 states, 11271 states have (on average 3.6969213024576346) internal successors, (41668), 11271 states have internal predecessors, (41668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:05,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11272 states to 11272 states and 41668 transitions. [2021-06-05 21:14:05,039 INFO L78 Accepts]: Start accepts. Automaton has 11272 states and 41668 transitions. Word has length 27 [2021-06-05 21:14:05,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:05,039 INFO L482 AbstractCegarLoop]: Abstraction has 11272 states and 41668 transitions. [2021-06-05 21:14:05,039 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:05,040 INFO L276 IsEmpty]: Start isEmpty. Operand 11272 states and 41668 transitions. [2021-06-05 21:14:05,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 21:14:05,055 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:05,055 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:05,255 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:05,256 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:05,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:05,256 INFO L82 PathProgramCache]: Analyzing trace with hash 1936586544, now seen corresponding path program 56 times [2021-06-05 21:14:05,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:05,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890352322] [2021-06-05 21:14:05,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:05,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:05,327 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:05,327 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:05,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890352322] [2021-06-05 21:14:05,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890352322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:05,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396277471] [2021-06-05 21:14:05,327 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:05,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:14:05,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:14:05,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:14:05,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:05,499 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:05,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396277471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:05,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:05,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 21:14:05,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906833282] [2021-06-05 21:14:05,499 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:14:05,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:05,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:14:05,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:14:05,500 INFO L87 Difference]: Start difference. First operand 11272 states and 41668 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:05,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:05,768 INFO L93 Difference]: Finished difference Result 11437 states and 42157 transitions. [2021-06-05 21:14:05,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:14:05,768 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 21:14:05,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:05,788 INFO L225 Difference]: With dead ends: 11437 [2021-06-05 21:14:05,788 INFO L226 Difference]: Without dead ends: 11422 [2021-06-05 21:14:05,788 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 196.7ms TimeCoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:14:05,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11422 states. [2021-06-05 21:14:05,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11422 to 11302. [2021-06-05 21:14:05,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11302 states, 11301 states have (on average 3.6956021591009645) internal successors, (41764), 11301 states have internal predecessors, (41764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:05,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11302 states to 11302 states and 41764 transitions. [2021-06-05 21:14:05,943 INFO L78 Accepts]: Start accepts. Automaton has 11302 states and 41764 transitions. Word has length 27 [2021-06-05 21:14:05,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:05,943 INFO L482 AbstractCegarLoop]: Abstraction has 11302 states and 41764 transitions. [2021-06-05 21:14:05,943 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:05,943 INFO L276 IsEmpty]: Start isEmpty. Operand 11302 states and 41764 transitions. [2021-06-05 21:14:05,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 21:14:05,959 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:05,960 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:06,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-06-05 21:14:06,160 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:06,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:06,160 INFO L82 PathProgramCache]: Analyzing trace with hash -1960365508, now seen corresponding path program 57 times [2021-06-05 21:14:06,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:06,160 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60629709] [2021-06-05 21:14:06,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:06,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:06,213 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:06,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:06,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60629709] [2021-06-05 21:14:06,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60629709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:06,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230294523] [2021-06-05 21:14:06,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:06,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:14:06,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:14:06,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:14:06,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:06,356 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:06,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230294523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:06,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:06,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 21:14:06,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579291830] [2021-06-05 21:14:06,356 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:14:06,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:06,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:14:06,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:14:06,357 INFO L87 Difference]: Start difference. First operand 11302 states and 41764 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:06,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:06,547 INFO L93 Difference]: Finished difference Result 11677 states and 42772 transitions. [2021-06-05 21:14:06,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:14:06,548 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 21:14:06,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:06,568 INFO L225 Difference]: With dead ends: 11677 [2021-06-05 21:14:06,568 INFO L226 Difference]: Without dead ends: 11625 [2021-06-05 21:14:06,568 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 133.3ms TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:14:06,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11625 states. [2021-06-05 21:14:06,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11625 to 11308. [2021-06-05 21:14:06,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11308 states, 11307 states have (on average 3.6952330414787298) internal successors, (41782), 11307 states have internal predecessors, (41782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:06,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11308 states to 11308 states and 41782 transitions. [2021-06-05 21:14:06,747 INFO L78 Accepts]: Start accepts. Automaton has 11308 states and 41782 transitions. Word has length 27 [2021-06-05 21:14:06,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:06,747 INFO L482 AbstractCegarLoop]: Abstraction has 11308 states and 41782 transitions. [2021-06-05 21:14:06,747 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:06,747 INFO L276 IsEmpty]: Start isEmpty. Operand 11308 states and 41782 transitions. [2021-06-05 21:14:06,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 21:14:06,764 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:06,764 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:06,965 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:06,965 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:06,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:06,965 INFO L82 PathProgramCache]: Analyzing trace with hash 352248576, now seen corresponding path program 58 times [2021-06-05 21:14:06,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:06,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964832564] [2021-06-05 21:14:06,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:06,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:07,044 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:07,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:07,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964832564] [2021-06-05 21:14:07,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964832564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:07,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400976240] [2021-06-05 21:14:07,044 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:07,073 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:14:07,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:14:07,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:14:07,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:07,192 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:07,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400976240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:07,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:07,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 21:14:07,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378469042] [2021-06-05 21:14:07,192 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:14:07,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:07,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:14:07,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:14:07,193 INFO L87 Difference]: Start difference. First operand 11308 states and 41782 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:07,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:07,409 INFO L93 Difference]: Finished difference Result 11704 states and 42906 transitions. [2021-06-05 21:14:07,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:14:07,410 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 21:14:07,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:07,432 INFO L225 Difference]: With dead ends: 11704 [2021-06-05 21:14:07,432 INFO L226 Difference]: Without dead ends: 11674 [2021-06-05 21:14:07,432 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 144.3ms TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:14:07,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11674 states. [2021-06-05 21:14:07,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11674 to 11310. [2021-06-05 21:14:07,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11310 states, 11309 states have (on average 3.695463789901848) internal successors, (41792), 11309 states have internal predecessors, (41792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:07,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11310 states to 11310 states and 41792 transitions. [2021-06-05 21:14:07,613 INFO L78 Accepts]: Start accepts. Automaton has 11310 states and 41792 transitions. Word has length 27 [2021-06-05 21:14:07,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:07,613 INFO L482 AbstractCegarLoop]: Abstraction has 11310 states and 41792 transitions. [2021-06-05 21:14:07,613 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:07,613 INFO L276 IsEmpty]: Start isEmpty. Operand 11310 states and 41792 transitions. [2021-06-05 21:14:07,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 21:14:07,629 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:07,629 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:07,829 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-06-05 21:14:07,830 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:07,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:07,830 INFO L82 PathProgramCache]: Analyzing trace with hash -531126336, now seen corresponding path program 59 times [2021-06-05 21:14:07,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:07,830 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016566307] [2021-06-05 21:14:07,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:07,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:07,945 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:07,945 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:07,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016566307] [2021-06-05 21:14:07,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016566307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:07,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442891444] [2021-06-05 21:14:07,946 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:07,968 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:14:07,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:14:07,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:14:07,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:08,119 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:08,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442891444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:08,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:08,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 21:14:08,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148807062] [2021-06-05 21:14:08,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:14:08,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:08,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:14:08,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:14:08,121 INFO L87 Difference]: Start difference. First operand 11310 states and 41792 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:08,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:08,341 INFO L93 Difference]: Finished difference Result 11586 states and 42494 transitions. [2021-06-05 21:14:08,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:14:08,341 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 21:14:08,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:08,361 INFO L225 Difference]: With dead ends: 11586 [2021-06-05 21:14:08,361 INFO L226 Difference]: Without dead ends: 11512 [2021-06-05 21:14:08,362 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 222.9ms TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:14:08,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11512 states. [2021-06-05 21:14:08,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11512 to 11372. [2021-06-05 21:14:08,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11372 states, 11371 states have (on average 3.692639169817958) internal successors, (41989), 11371 states have internal predecessors, (41989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:08,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11372 states to 11372 states and 41989 transitions. [2021-06-05 21:14:08,535 INFO L78 Accepts]: Start accepts. Automaton has 11372 states and 41989 transitions. Word has length 27 [2021-06-05 21:14:08,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:08,535 INFO L482 AbstractCegarLoop]: Abstraction has 11372 states and 41989 transitions. [2021-06-05 21:14:08,535 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:08,535 INFO L276 IsEmpty]: Start isEmpty. Operand 11372 states and 41989 transitions. [2021-06-05 21:14:08,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 21:14:08,551 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:08,551 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:08,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:08,765 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:08,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:08,765 INFO L82 PathProgramCache]: Analyzing trace with hash 1957542588, now seen corresponding path program 60 times [2021-06-05 21:14:08,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:08,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107692773] [2021-06-05 21:14:08,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:08,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:08,815 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:14:08,815 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:08,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107692773] [2021-06-05 21:14:08,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107692773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:08,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739161616] [2021-06-05 21:14:08,816 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:08,839 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:14:08,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:14:08,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:14:08,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:08,950 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:08,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739161616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:08,950 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:08,950 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 21:14:08,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376918004] [2021-06-05 21:14:08,950 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:14:08,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:08,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:14:08,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:14:08,951 INFO L87 Difference]: Start difference. First operand 11372 states and 41989 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:09,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:09,160 INFO L93 Difference]: Finished difference Result 11723 states and 42964 transitions. [2021-06-05 21:14:09,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:14:09,161 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 21:14:09,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:09,182 INFO L225 Difference]: With dead ends: 11723 [2021-06-05 21:14:09,182 INFO L226 Difference]: Without dead ends: 11685 [2021-06-05 21:14:09,182 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 129.7ms TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:14:09,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11685 states. [2021-06-05 21:14:09,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11685 to 11411. [2021-06-05 21:14:09,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11411 states, 11410 states have (on average 3.692900964066608) internal successors, (42136), 11410 states have internal predecessors, (42136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:09,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11411 states to 11411 states and 42136 transitions. [2021-06-05 21:14:09,344 INFO L78 Accepts]: Start accepts. Automaton has 11411 states and 42136 transitions. Word has length 27 [2021-06-05 21:14:09,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:09,344 INFO L482 AbstractCegarLoop]: Abstraction has 11411 states and 42136 transitions. [2021-06-05 21:14:09,344 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:09,344 INFO L276 IsEmpty]: Start isEmpty. Operand 11411 states and 42136 transitions. [2021-06-05 21:14:09,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 21:14:09,360 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:09,360 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:09,561 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-06-05 21:14:09,561 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:09,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:09,568 INFO L82 PathProgramCache]: Analyzing trace with hash -889299460, now seen corresponding path program 61 times [2021-06-05 21:14:09,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:09,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254866138] [2021-06-05 21:14:09,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:09,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:09,627 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:09,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:09,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254866138] [2021-06-05 21:14:09,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254866138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:09,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480050841] [2021-06-05 21:14:09,627 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:09,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:09,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:14:09,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:09,771 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:09,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480050841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:09,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:09,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 21:14:09,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251286895] [2021-06-05 21:14:09,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:14:09,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:09,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:14:09,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:14:09,771 INFO L87 Difference]: Start difference. First operand 11411 states and 42136 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:10,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:10,012 INFO L93 Difference]: Finished difference Result 11793 states and 43179 transitions. [2021-06-05 21:14:10,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:14:10,013 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 21:14:10,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:10,034 INFO L225 Difference]: With dead ends: 11793 [2021-06-05 21:14:10,034 INFO L226 Difference]: Without dead ends: 11741 [2021-06-05 21:14:10,034 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 163.6ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:14:10,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11741 states. [2021-06-05 21:14:10,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11741 to 11475. [2021-06-05 21:14:10,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11475 states, 11474 states have (on average 3.6911277671256753) internal successors, (42352), 11474 states have internal predecessors, (42352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:10,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11475 states to 11475 states and 42352 transitions. [2021-06-05 21:14:10,225 INFO L78 Accepts]: Start accepts. Automaton has 11475 states and 42352 transitions. Word has length 27 [2021-06-05 21:14:10,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:10,226 INFO L482 AbstractCegarLoop]: Abstraction has 11475 states and 42352 transitions. [2021-06-05 21:14:10,226 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:10,226 INFO L276 IsEmpty]: Start isEmpty. Operand 11475 states and 42352 transitions. [2021-06-05 21:14:10,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 21:14:10,243 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:10,243 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:10,443 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:10,443 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:10,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:10,443 INFO L82 PathProgramCache]: Analyzing trace with hash -421900604, now seen corresponding path program 62 times [2021-06-05 21:14:10,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:10,443 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654025159] [2021-06-05 21:14:10,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:10,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:10,501 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:10,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:10,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654025159] [2021-06-05 21:14:10,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654025159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:10,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793691137] [2021-06-05 21:14:10,502 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:10,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:14:10,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:14:10,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:14:10,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:10,636 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:10,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793691137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:10,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:10,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 21:14:10,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159825019] [2021-06-05 21:14:10,636 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:14:10,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:10,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:14:10,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:14:10,637 INFO L87 Difference]: Start difference. First operand 11475 states and 42352 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:10,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:10,902 INFO L93 Difference]: Finished difference Result 11715 states and 42996 transitions. [2021-06-05 21:14:10,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:14:10,902 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 21:14:10,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:10,921 INFO L225 Difference]: With dead ends: 11715 [2021-06-05 21:14:10,922 INFO L226 Difference]: Without dead ends: 11659 [2021-06-05 21:14:10,922 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 151.8ms TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:14:10,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11659 states. [2021-06-05 21:14:11,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11659 to 11503. [2021-06-05 21:14:11,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11503 states, 11502 states have (on average 3.691531907494349) internal successors, (42460), 11502 states have internal predecessors, (42460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:11,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11503 states to 11503 states and 42460 transitions. [2021-06-05 21:14:11,081 INFO L78 Accepts]: Start accepts. Automaton has 11503 states and 42460 transitions. Word has length 27 [2021-06-05 21:14:11,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:11,081 INFO L482 AbstractCegarLoop]: Abstraction has 11503 states and 42460 transitions. [2021-06-05 21:14:11,081 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:11,081 INFO L276 IsEmpty]: Start isEmpty. Operand 11503 states and 42460 transitions. [2021-06-05 21:14:11,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 21:14:11,097 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:11,097 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:11,297 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:11,297 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:11,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:11,298 INFO L82 PathProgramCache]: Analyzing trace with hash 85705924, now seen corresponding path program 63 times [2021-06-05 21:14:11,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:11,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925044289] [2021-06-05 21:14:11,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:11,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:11,358 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:11,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:11,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925044289] [2021-06-05 21:14:11,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925044289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:11,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638232111] [2021-06-05 21:14:11,358 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:11,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:14:11,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:14:11,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:14:11,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:11,519 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:11,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638232111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:11,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:11,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 21:14:11,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622086284] [2021-06-05 21:14:11,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:14:11,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:11,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:14:11,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:14:11,520 INFO L87 Difference]: Start difference. First operand 11503 states and 42460 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:11,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:11,748 INFO L93 Difference]: Finished difference Result 11675 states and 42930 transitions. [2021-06-05 21:14:11,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:14:11,748 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 21:14:11,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:11,768 INFO L225 Difference]: With dead ends: 11675 [2021-06-05 21:14:11,768 INFO L226 Difference]: Without dead ends: 11649 [2021-06-05 21:14:11,769 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 195.1ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:14:11,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11649 states. [2021-06-05 21:14:11,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11649 to 11510. [2021-06-05 21:14:11,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11510 states, 11509 states have (on average 3.6920670779390043) internal successors, (42492), 11509 states have internal predecessors, (42492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:11,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11510 states to 11510 states and 42492 transitions. [2021-06-05 21:14:11,928 INFO L78 Accepts]: Start accepts. Automaton has 11510 states and 42492 transitions. Word has length 27 [2021-06-05 21:14:11,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:11,928 INFO L482 AbstractCegarLoop]: Abstraction has 11510 states and 42492 transitions. [2021-06-05 21:14:11,928 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:11,928 INFO L276 IsEmpty]: Start isEmpty. Operand 11510 states and 42492 transitions. [2021-06-05 21:14:11,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 21:14:11,944 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:11,944 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:12,145 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2021-06-05 21:14:12,145 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:12,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:12,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1402020932, now seen corresponding path program 64 times [2021-06-05 21:14:12,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:12,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706230178] [2021-06-05 21:14:12,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:12,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:12,206 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:12,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:12,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706230178] [2021-06-05 21:14:12,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706230178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:12,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609417112] [2021-06-05 21:14:12,207 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:12,231 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:14:12,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:14:12,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:14:12,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:12,368 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:12,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609417112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:12,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:12,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 21:14:12,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236798659] [2021-06-05 21:14:12,368 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:14:12,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:12,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:14:12,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:14:12,369 INFO L87 Difference]: Start difference. First operand 11510 states and 42492 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:12,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:12,597 INFO L93 Difference]: Finished difference Result 12092 states and 44144 transitions. [2021-06-05 21:14:12,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:14:12,598 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 21:14:12,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:12,618 INFO L225 Difference]: With dead ends: 12092 [2021-06-05 21:14:12,619 INFO L226 Difference]: Without dead ends: 12062 [2021-06-05 21:14:12,619 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 178.6ms TimeCoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:14:12,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12062 states. [2021-06-05 21:14:12,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12062 to 11576. [2021-06-05 21:14:12,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11576 states, 11575 states have (on average 3.691317494600432) internal successors, (42727), 11575 states have internal predecessors, (42727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:12,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11576 states to 11576 states and 42727 transitions. [2021-06-05 21:14:12,784 INFO L78 Accepts]: Start accepts. Automaton has 11576 states and 42727 transitions. Word has length 27 [2021-06-05 21:14:12,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:12,784 INFO L482 AbstractCegarLoop]: Abstraction has 11576 states and 42727 transitions. [2021-06-05 21:14:12,784 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:12,784 INFO L276 IsEmpty]: Start isEmpty. Operand 11576 states and 42727 transitions. [2021-06-05 21:14:12,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 21:14:12,800 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:12,801 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:13,001 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:13,001 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:13,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:13,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1736892992, now seen corresponding path program 65 times [2021-06-05 21:14:13,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:13,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337746632] [2021-06-05 21:14:13,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:13,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:13,062 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:13,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:13,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337746632] [2021-06-05 21:14:13,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337746632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:13,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145532031] [2021-06-05 21:14:13,062 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:13,085 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:14:13,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:14:13,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:14:13,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:13,207 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:13,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145532031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:13,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:13,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 21:14:13,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109315905] [2021-06-05 21:14:13,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:14:13,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:13,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:14:13,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:14:13,208 INFO L87 Difference]: Start difference. First operand 11576 states and 42727 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:13,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:13,464 INFO L93 Difference]: Finished difference Result 11997 states and 43864 transitions. [2021-06-05 21:14:13,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:14:13,464 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 21:14:13,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:13,485 INFO L225 Difference]: With dead ends: 11997 [2021-06-05 21:14:13,485 INFO L226 Difference]: Without dead ends: 11917 [2021-06-05 21:14:13,485 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 162.0ms TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:14:13,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11917 states. [2021-06-05 21:14:13,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11917 to 11602. [2021-06-05 21:14:13,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11602 states, 11601 states have (on average 3.6938194983191104) internal successors, (42852), 11601 states have internal predecessors, (42852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:13,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11602 states to 11602 states and 42852 transitions. [2021-06-05 21:14:13,725 INFO L78 Accepts]: Start accepts. Automaton has 11602 states and 42852 transitions. Word has length 27 [2021-06-05 21:14:13,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:13,725 INFO L482 AbstractCegarLoop]: Abstraction has 11602 states and 42852 transitions. [2021-06-05 21:14:13,725 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:13,725 INFO L276 IsEmpty]: Start isEmpty. Operand 11602 states and 42852 transitions. [2021-06-05 21:14:13,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 21:14:13,742 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:13,742 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:13,942 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:13,943 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:13,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:13,943 INFO L82 PathProgramCache]: Analyzing trace with hash -73533572, now seen corresponding path program 66 times [2021-06-05 21:14:13,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:13,943 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51232869] [2021-06-05 21:14:13,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:13,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:14,010 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:14,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:14,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51232869] [2021-06-05 21:14:14,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51232869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:14,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170927928] [2021-06-05 21:14:14,010 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:14,035 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:14:14,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:14:14,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:14:14,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:14,167 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:14,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170927928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:14,168 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:14,168 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 21:14:14,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922436078] [2021-06-05 21:14:14,168 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:14:14,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:14,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:14:14,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:14:14,168 INFO L87 Difference]: Start difference. First operand 11602 states and 42852 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:14,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:14,455 INFO L93 Difference]: Finished difference Result 11771 states and 43353 transitions. [2021-06-05 21:14:14,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:14:14,456 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 21:14:14,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:14,479 INFO L225 Difference]: With dead ends: 11771 [2021-06-05 21:14:14,479 INFO L226 Difference]: Without dead ends: 11756 [2021-06-05 21:14:14,480 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 198.7ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:14:14,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11756 states. [2021-06-05 21:14:14,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11756 to 11607. [2021-06-05 21:14:14,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11607 states, 11606 states have (on average 3.694468378424953) internal successors, (42878), 11606 states have internal predecessors, (42878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:14,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11607 states to 11607 states and 42878 transitions. [2021-06-05 21:14:14,655 INFO L78 Accepts]: Start accepts. Automaton has 11607 states and 42878 transitions. Word has length 27 [2021-06-05 21:14:14,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:14,655 INFO L482 AbstractCegarLoop]: Abstraction has 11607 states and 42878 transitions. [2021-06-05 21:14:14,655 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:14,655 INFO L276 IsEmpty]: Start isEmpty. Operand 11607 states and 42878 transitions. [2021-06-05 21:14:14,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 21:14:14,671 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:14,671 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:14,871 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-06-05 21:14:14,871 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:14,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:14,872 INFO L82 PathProgramCache]: Analyzing trace with hash -819151172, now seen corresponding path program 67 times [2021-06-05 21:14:14,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:14,872 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319069312] [2021-06-05 21:14:14,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:14,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:14,929 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:14,929 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:14,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319069312] [2021-06-05 21:14:14,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319069312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:14,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606249407] [2021-06-05 21:14:14,929 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:14,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:14,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:14:14,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:15,070 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:15,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606249407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:15,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:15,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 21:14:15,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053275269] [2021-06-05 21:14:15,071 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:14:15,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:15,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:14:15,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:14:15,071 INFO L87 Difference]: Start difference. First operand 11607 states and 42878 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:15,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:15,301 INFO L93 Difference]: Finished difference Result 13036 states and 47204 transitions. [2021-06-05 21:14:15,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:14:15,301 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 21:14:15,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:15,325 INFO L225 Difference]: With dead ends: 13036 [2021-06-05 21:14:15,325 INFO L226 Difference]: Without dead ends: 12976 [2021-06-05 21:14:15,325 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 138.8ms TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:14:15,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12976 states. [2021-06-05 21:14:15,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12976 to 11956. [2021-06-05 21:14:15,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11956 states, 11955 states have (on average 3.700710999581765) internal successors, (44242), 11955 states have internal predecessors, (44242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:15,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11956 states to 11956 states and 44242 transitions. [2021-06-05 21:14:15,515 INFO L78 Accepts]: Start accepts. Automaton has 11956 states and 44242 transitions. Word has length 27 [2021-06-05 21:14:15,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:15,515 INFO L482 AbstractCegarLoop]: Abstraction has 11956 states and 44242 transitions. [2021-06-05 21:14:15,515 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:15,515 INFO L276 IsEmpty]: Start isEmpty. Operand 11956 states and 44242 transitions. [2021-06-05 21:14:15,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 21:14:15,533 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:15,533 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:15,733 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:15,733 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:15,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:15,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1181413760, now seen corresponding path program 68 times [2021-06-05 21:14:15,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:15,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207617834] [2021-06-05 21:14:15,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:15,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:15,779 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:15,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:15,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207617834] [2021-06-05 21:14:15,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207617834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:15,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56457754] [2021-06-05 21:14:15,780 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:15,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:14:15,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:14:15,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:14:15,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:15,919 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:15,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56457754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:15,919 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:15,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 21:14:15,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573856849] [2021-06-05 21:14:15,919 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:14:15,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:15,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:14:15,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:14:15,920 INFO L87 Difference]: Start difference. First operand 11956 states and 44242 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:16,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:16,087 INFO L93 Difference]: Finished difference Result 12395 states and 45519 transitions. [2021-06-05 21:14:16,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:14:16,087 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 21:14:16,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:16,112 INFO L225 Difference]: With dead ends: 12395 [2021-06-05 21:14:16,112 INFO L226 Difference]: Without dead ends: 12365 [2021-06-05 21:14:16,113 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 127.8ms TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:14:16,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12365 states. [2021-06-05 21:14:16,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12365 to 11952. [2021-06-05 21:14:16,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11952 states, 11951 states have (on average 3.7014475776085685) internal successors, (44236), 11951 states have internal predecessors, (44236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:16,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11952 states to 11952 states and 44236 transitions. [2021-06-05 21:14:16,300 INFO L78 Accepts]: Start accepts. Automaton has 11952 states and 44236 transitions. Word has length 27 [2021-06-05 21:14:16,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:16,300 INFO L482 AbstractCegarLoop]: Abstraction has 11952 states and 44236 transitions. [2021-06-05 21:14:16,300 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:16,300 INFO L276 IsEmpty]: Start isEmpty. Operand 11952 states and 44236 transitions. [2021-06-05 21:14:16,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 21:14:16,318 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:16,318 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:16,531 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-06-05 21:14:16,532 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:16,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:16,532 INFO L82 PathProgramCache]: Analyzing trace with hash 1510401284, now seen corresponding path program 69 times [2021-06-05 21:14:16,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:16,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84513874] [2021-06-05 21:14:16,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:16,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:16,581 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:16,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:16,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84513874] [2021-06-05 21:14:16,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84513874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:16,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722198177] [2021-06-05 21:14:16,582 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:16,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:14:16,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:14:16,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:14:16,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:16,725 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:16,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722198177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:16,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:16,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 21:14:16,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409772318] [2021-06-05 21:14:16,726 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:14:16,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:16,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:14:16,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:14:16,726 INFO L87 Difference]: Start difference. First operand 11952 states and 44236 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:17,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:17,013 INFO L93 Difference]: Finished difference Result 12368 states and 45416 transitions. [2021-06-05 21:14:17,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:14:17,013 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 21:14:17,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:17,038 INFO L225 Difference]: With dead ends: 12368 [2021-06-05 21:14:17,038 INFO L226 Difference]: Without dead ends: 12338 [2021-06-05 21:14:17,038 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 134.2ms TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:14:17,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12338 states. [2021-06-05 21:14:17,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12338 to 11996. [2021-06-05 21:14:17,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11996 states, 11995 states have (on average 3.7018757815756564) internal successors, (44404), 11995 states have internal predecessors, (44404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:17,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11996 states to 11996 states and 44404 transitions. [2021-06-05 21:14:17,229 INFO L78 Accepts]: Start accepts. Automaton has 11996 states and 44404 transitions. Word has length 27 [2021-06-05 21:14:17,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:17,229 INFO L482 AbstractCegarLoop]: Abstraction has 11996 states and 44404 transitions. [2021-06-05 21:14:17,229 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:17,229 INFO L276 IsEmpty]: Start isEmpty. Operand 11996 states and 44404 transitions. [2021-06-05 21:14:17,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 21:14:17,247 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:17,247 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:17,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-06-05 21:14:17,448 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:17,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:17,448 INFO L82 PathProgramCache]: Analyzing trace with hash 1977800140, now seen corresponding path program 70 times [2021-06-05 21:14:17,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:17,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805677433] [2021-06-05 21:14:17,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:17,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:17,498 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:17,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:17,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805677433] [2021-06-05 21:14:17,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805677433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:17,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726689728] [2021-06-05 21:14:17,498 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:17,521 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:14:17,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:14:17,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:14:17,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:17,640 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:17,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726689728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:17,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:17,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 21:14:17,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857116590] [2021-06-05 21:14:17,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:14:17,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:17,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:14:17,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:14:17,641 INFO L87 Difference]: Start difference. First operand 11996 states and 44404 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:17,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:17,812 INFO L93 Difference]: Finished difference Result 12466 states and 45766 transitions. [2021-06-05 21:14:17,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:14:17,812 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 21:14:17,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:17,836 INFO L225 Difference]: With dead ends: 12466 [2021-06-05 21:14:17,836 INFO L226 Difference]: Without dead ends: 12395 [2021-06-05 21:14:17,837 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 131.8ms TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:14:17,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12395 states. [2021-06-05 21:14:17,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12395 to 12062. [2021-06-05 21:14:17,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12062 states, 12061 states have (on average 3.7025951413647293) internal successors, (44657), 12061 states have internal predecessors, (44657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:18,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12062 states to 12062 states and 44657 transitions. [2021-06-05 21:14:18,011 INFO L78 Accepts]: Start accepts. Automaton has 12062 states and 44657 transitions. Word has length 27 [2021-06-05 21:14:18,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:18,011 INFO L482 AbstractCegarLoop]: Abstraction has 12062 states and 44657 transitions. [2021-06-05 21:14:18,011 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:18,011 INFO L276 IsEmpty]: Start isEmpty. Operand 12062 states and 44657 transitions. [2021-06-05 21:14:18,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 21:14:18,028 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:18,028 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:18,229 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-06-05 21:14:18,229 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:18,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:18,229 INFO L82 PathProgramCache]: Analyzing trace with hash -387127492, now seen corresponding path program 71 times [2021-06-05 21:14:18,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:18,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827272154] [2021-06-05 21:14:18,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:18,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:18,274 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:18,274 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:18,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827272154] [2021-06-05 21:14:18,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827272154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:18,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388623389] [2021-06-05 21:14:18,274 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:18,302 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:14:18,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:14:18,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:14:18,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:18,414 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:18,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388623389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:18,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:18,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 21:14:18,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788162126] [2021-06-05 21:14:18,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:14:18,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:18,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:14:18,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:14:18,415 INFO L87 Difference]: Start difference. First operand 12062 states and 44657 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:18,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:18,585 INFO L93 Difference]: Finished difference Result 12451 states and 45748 transitions. [2021-06-05 21:14:18,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:14:18,585 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 21:14:18,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:18,606 INFO L225 Difference]: With dead ends: 12451 [2021-06-05 21:14:18,606 INFO L226 Difference]: Without dead ends: 12413 [2021-06-05 21:14:18,606 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 123.8ms TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:14:18,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12413 states. [2021-06-05 21:14:18,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12413 to 12104. [2021-06-05 21:14:18,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12104 states, 12103 states have (on average 3.702883582582831) internal successors, (44816), 12103 states have internal predecessors, (44816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:18,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12104 states to 12104 states and 44816 transitions. [2021-06-05 21:14:18,773 INFO L78 Accepts]: Start accepts. Automaton has 12104 states and 44816 transitions. Word has length 27 [2021-06-05 21:14:18,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:18,773 INFO L482 AbstractCegarLoop]: Abstraction has 12104 states and 44816 transitions. [2021-06-05 21:14:18,773 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:18,773 INFO L276 IsEmpty]: Start isEmpty. Operand 12104 states and 44816 transitions. [2021-06-05 21:14:18,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 21:14:18,790 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:18,790 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:18,990 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:18,991 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:18,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:18,991 INFO L82 PathProgramCache]: Analyzing trace with hash 1978137212, now seen corresponding path program 72 times [2021-06-05 21:14:18,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:18,991 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778035346] [2021-06-05 21:14:18,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:18,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:19,050 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:19,050 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:19,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778035346] [2021-06-05 21:14:19,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778035346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:19,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936025089] [2021-06-05 21:14:19,050 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:19,086 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:14:19,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:14:19,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:14:19,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:19,199 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:19,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936025089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:19,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:19,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 21:14:19,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478341990] [2021-06-05 21:14:19,200 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:14:19,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:19,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:14:19,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:14:19,200 INFO L87 Difference]: Start difference. First operand 12104 states and 44816 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:19,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:19,421 INFO L93 Difference]: Finished difference Result 12499 states and 45950 transitions. [2021-06-05 21:14:19,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:14:19,421 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 21:14:19,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:19,445 INFO L225 Difference]: With dead ends: 12499 [2021-06-05 21:14:19,445 INFO L226 Difference]: Without dead ends: 12469 [2021-06-05 21:14:19,445 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 157.6ms TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:14:19,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12469 states. [2021-06-05 21:14:19,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12469 to 12148. [2021-06-05 21:14:19,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12148 states, 12147 states have (on average 3.7034658763480697) internal successors, (44986), 12147 states have internal predecessors, (44986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:19,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12148 states to 12148 states and 44986 transitions. [2021-06-05 21:14:19,611 INFO L78 Accepts]: Start accepts. Automaton has 12148 states and 44986 transitions. Word has length 27 [2021-06-05 21:14:19,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:19,611 INFO L482 AbstractCegarLoop]: Abstraction has 12148 states and 44986 transitions. [2021-06-05 21:14:19,611 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:19,611 INFO L276 IsEmpty]: Start isEmpty. Operand 12148 states and 44986 transitions. [2021-06-05 21:14:19,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 21:14:19,627 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:19,627 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:19,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:19,828 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:19,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:19,828 INFO L82 PathProgramCache]: Analyzing trace with hash -4216000, now seen corresponding path program 73 times [2021-06-05 21:14:19,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:19,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818868170] [2021-06-05 21:14:19,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:19,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:19,877 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:19,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:19,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818868170] [2021-06-05 21:14:19,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818868170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:19,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542210922] [2021-06-05 21:14:19,877 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:19,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:19,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:14:19,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:20,026 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:20,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542210922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:20,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:20,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 21:14:20,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839549577] [2021-06-05 21:14:20,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:14:20,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:20,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:14:20,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:14:20,027 INFO L87 Difference]: Start difference. First operand 12148 states and 44986 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:20,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:20,264 INFO L93 Difference]: Finished difference Result 12648 states and 46358 transitions. [2021-06-05 21:14:20,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:14:20,265 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 21:14:20,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:20,288 INFO L225 Difference]: With dead ends: 12648 [2021-06-05 21:14:20,289 INFO L226 Difference]: Without dead ends: 12604 [2021-06-05 21:14:20,289 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 147.5ms TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:14:20,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12604 states. [2021-06-05 21:14:20,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12604 to 12166. [2021-06-05 21:14:20,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12166 states, 12165 states have (on average 3.705219893136046) internal successors, (45074), 12165 states have internal predecessors, (45074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:20,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12166 states to 12166 states and 45074 transitions. [2021-06-05 21:14:20,480 INFO L78 Accepts]: Start accepts. Automaton has 12166 states and 45074 transitions. Word has length 27 [2021-06-05 21:14:20,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:20,480 INFO L482 AbstractCegarLoop]: Abstraction has 12166 states and 45074 transitions. [2021-06-05 21:14:20,480 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:20,480 INFO L276 IsEmpty]: Start isEmpty. Operand 12166 states and 45074 transitions. [2021-06-05 21:14:20,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 21:14:20,497 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:20,497 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:20,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:20,709 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:20,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:20,709 INFO L82 PathProgramCache]: Analyzing trace with hash 903412800, now seen corresponding path program 74 times [2021-06-05 21:14:20,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:20,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095334657] [2021-06-05 21:14:20,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:20,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:20,763 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:20,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:20,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095334657] [2021-06-05 21:14:20,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095334657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:20,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335506883] [2021-06-05 21:14:20,763 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:20,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:14:20,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:14:20,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:14:20,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:20,920 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:20,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335506883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:20,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:20,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 21:14:20,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724048510] [2021-06-05 21:14:20,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:14:20,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:20,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:14:20,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:14:20,921 INFO L87 Difference]: Start difference. First operand 12166 states and 45074 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:21,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:21,164 INFO L93 Difference]: Finished difference Result 12571 states and 46145 transitions. [2021-06-05 21:14:21,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:14:21,165 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 21:14:21,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:21,188 INFO L225 Difference]: With dead ends: 12571 [2021-06-05 21:14:21,188 INFO L226 Difference]: Without dead ends: 12515 [2021-06-05 21:14:21,188 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 158.6ms TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:14:21,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12515 states. [2021-06-05 21:14:21,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12515 to 12209. [2021-06-05 21:14:21,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12209 states, 12208 states have (on average 3.705848623853211) internal successors, (45241), 12208 states have internal predecessors, (45241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:21,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12209 states to 12209 states and 45241 transitions. [2021-06-05 21:14:21,377 INFO L78 Accepts]: Start accepts. Automaton has 12209 states and 45241 transitions. Word has length 27 [2021-06-05 21:14:21,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:21,377 INFO L482 AbstractCegarLoop]: Abstraction has 12209 states and 45241 transitions. [2021-06-05 21:14:21,378 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:21,378 INFO L276 IsEmpty]: Start isEmpty. Operand 12209 states and 45241 transitions. [2021-06-05 21:14:21,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 21:14:21,395 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:21,395 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:21,595 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:21,596 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:21,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:21,596 INFO L82 PathProgramCache]: Analyzing trace with hash -995116224, now seen corresponding path program 75 times [2021-06-05 21:14:21,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:21,596 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145404552] [2021-06-05 21:14:21,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:21,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:21,653 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:21,653 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:21,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145404552] [2021-06-05 21:14:21,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145404552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:21,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588890980] [2021-06-05 21:14:21,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:21,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:14:21,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:14:21,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:14:21,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:21,798 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:21,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588890980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:21,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:21,798 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 21:14:21,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965995665] [2021-06-05 21:14:21,798 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:14:21,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:21,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:14:21,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:14:21,799 INFO L87 Difference]: Start difference. First operand 12209 states and 45241 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:22,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:22,081 INFO L93 Difference]: Finished difference Result 12816 states and 46949 transitions. [2021-06-05 21:14:22,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:14:22,081 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 21:14:22,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:22,105 INFO L225 Difference]: With dead ends: 12816 [2021-06-05 21:14:22,105 INFO L226 Difference]: Without dead ends: 12786 [2021-06-05 21:14:22,105 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 180.8ms TimeCoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:14:22,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12786 states. [2021-06-05 21:14:22,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12786 to 12267. [2021-06-05 21:14:22,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12267 states, 12266 states have (on average 3.7053644219794553) internal successors, (45450), 12266 states have internal predecessors, (45450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:22,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12267 states to 12267 states and 45450 transitions. [2021-06-05 21:14:22,297 INFO L78 Accepts]: Start accepts. Automaton has 12267 states and 45450 transitions. Word has length 27 [2021-06-05 21:14:22,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:22,297 INFO L482 AbstractCegarLoop]: Abstraction has 12267 states and 45450 transitions. [2021-06-05 21:14:22,297 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:22,297 INFO L276 IsEmpty]: Start isEmpty. Operand 12267 states and 45450 transitions. [2021-06-05 21:14:22,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 21:14:22,314 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:22,314 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:22,514 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2021-06-05 21:14:22,514 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:22,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:22,515 INFO L82 PathProgramCache]: Analyzing trace with hash -527717368, now seen corresponding path program 76 times [2021-06-05 21:14:22,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:22,515 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707830719] [2021-06-05 21:14:22,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:22,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:22,585 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:22,586 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:22,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707830719] [2021-06-05 21:14:22,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707830719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:22,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188335626] [2021-06-05 21:14:22,586 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:22,615 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:14:22,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:14:22,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:14:22,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:22,762 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:22,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188335626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:22,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:22,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 21:14:22,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088176941] [2021-06-05 21:14:22,763 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:14:22,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:22,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:14:22,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:14:22,763 INFO L87 Difference]: Start difference. First operand 12267 states and 45450 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:23,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:23,012 INFO L93 Difference]: Finished difference Result 12669 states and 46586 transitions. [2021-06-05 21:14:23,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:14:23,013 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 21:14:23,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:23,036 INFO L225 Difference]: With dead ends: 12669 [2021-06-05 21:14:23,036 INFO L226 Difference]: Without dead ends: 12631 [2021-06-05 21:14:23,036 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 184.3ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:14:23,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12631 states. [2021-06-05 21:14:23,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12631 to 12291. [2021-06-05 21:14:23,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12291 states, 12290 states have (on average 3.7069975589910498) internal successors, (45559), 12290 states have internal predecessors, (45559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:23,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12291 states to 12291 states and 45559 transitions. [2021-06-05 21:14:23,300 INFO L78 Accepts]: Start accepts. Automaton has 12291 states and 45559 transitions. Word has length 27 [2021-06-05 21:14:23,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:23,300 INFO L482 AbstractCegarLoop]: Abstraction has 12291 states and 45559 transitions. [2021-06-05 21:14:23,300 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:23,300 INFO L276 IsEmpty]: Start isEmpty. Operand 12291 states and 45559 transitions. [2021-06-05 21:14:23,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 21:14:23,317 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:23,317 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:23,517 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:23,517 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:23,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:23,518 INFO L82 PathProgramCache]: Analyzing trace with hash -20110840, now seen corresponding path program 77 times [2021-06-05 21:14:23,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:23,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125542482] [2021-06-05 21:14:23,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:23,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:23,577 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:23,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:23,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125542482] [2021-06-05 21:14:23,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125542482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:23,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308649779] [2021-06-05 21:14:23,577 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:23,600 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:14:23,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:14:23,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:14:23,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:23,721 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:23,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308649779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:23,721 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:23,721 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 21:14:23,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430711650] [2021-06-05 21:14:23,722 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:14:23,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:23,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:14:23,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:14:23,722 INFO L87 Difference]: Start difference. First operand 12291 states and 45559 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:23,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:23,949 INFO L93 Difference]: Finished difference Result 12456 states and 46048 transitions. [2021-06-05 21:14:23,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:14:23,950 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 21:14:23,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:23,973 INFO L225 Difference]: With dead ends: 12456 [2021-06-05 21:14:23,973 INFO L226 Difference]: Without dead ends: 12441 [2021-06-05 21:14:23,974 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 200.1ms TimeCoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:14:23,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12441 states. [2021-06-05 21:14:24,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12441 to 12288. [2021-06-05 21:14:24,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12288 states, 12287 states have (on average 3.7083909823390577) internal successors, (45565), 12287 states have internal predecessors, (45565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:24,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12288 states to 12288 states and 45565 transitions. [2021-06-05 21:14:24,164 INFO L78 Accepts]: Start accepts. Automaton has 12288 states and 45565 transitions. Word has length 27 [2021-06-05 21:14:24,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:24,164 INFO L482 AbstractCegarLoop]: Abstraction has 12288 states and 45565 transitions. [2021-06-05 21:14:24,164 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:24,164 INFO L276 IsEmpty]: Start isEmpty. Operand 12288 states and 45565 transitions. [2021-06-05 21:14:24,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 21:14:24,182 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:24,182 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:24,382 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:24,382 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:24,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:24,382 INFO L82 PathProgramCache]: Analyzing trace with hash -1507837696, now seen corresponding path program 78 times [2021-06-05 21:14:24,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:24,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310820218] [2021-06-05 21:14:24,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:24,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:24,436 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:24,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:24,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310820218] [2021-06-05 21:14:24,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310820218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:24,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607845622] [2021-06-05 21:14:24,437 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:24,460 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:14:24,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:14:24,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:14:24,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:24,579 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:24,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607845622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:24,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:24,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 21:14:24,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063206259] [2021-06-05 21:14:24,579 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:14:24,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:24,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:14:24,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:14:24,580 INFO L87 Difference]: Start difference. First operand 12288 states and 45565 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:24,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:24,824 INFO L93 Difference]: Finished difference Result 12934 states and 47416 transitions. [2021-06-05 21:14:24,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:14:24,825 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 21:14:24,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:24,849 INFO L225 Difference]: With dead ends: 12934 [2021-06-05 21:14:24,849 INFO L226 Difference]: Without dead ends: 12890 [2021-06-05 21:14:24,849 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 173.4ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:14:24,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12890 states. [2021-06-05 21:14:24,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12890 to 12354. [2021-06-05 21:14:25,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12354 states, 12353 states have (on average 3.7074394883833888) internal successors, (45798), 12353 states have internal predecessors, (45798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:25,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12354 states to 12354 states and 45798 transitions. [2021-06-05 21:14:25,035 INFO L78 Accepts]: Start accepts. Automaton has 12354 states and 45798 transitions. Word has length 27 [2021-06-05 21:14:25,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:25,036 INFO L482 AbstractCegarLoop]: Abstraction has 12354 states and 45798 transitions. [2021-06-05 21:14:25,036 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:25,036 INFO L276 IsEmpty]: Start isEmpty. Operand 12354 states and 45798 transitions. [2021-06-05 21:14:25,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 21:14:25,053 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:25,053 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:25,253 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:25,253 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:25,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:25,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1631076228, now seen corresponding path program 79 times [2021-06-05 21:14:25,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:25,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950302647] [2021-06-05 21:14:25,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:25,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:25,309 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:25,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:25,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950302647] [2021-06-05 21:14:25,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950302647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:25,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056572708] [2021-06-05 21:14:25,310 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:25,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:25,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:14:25,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:25,456 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:25,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056572708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:25,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:25,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 21:14:25,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703337693] [2021-06-05 21:14:25,457 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:14:25,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:25,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:14:25,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:14:25,457 INFO L87 Difference]: Start difference. First operand 12354 states and 45798 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:25,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:25,647 INFO L93 Difference]: Finished difference Result 12785 states and 46949 transitions. [2021-06-05 21:14:25,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:14:25,648 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 21:14:25,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:25,671 INFO L225 Difference]: With dead ends: 12785 [2021-06-05 21:14:25,671 INFO L226 Difference]: Without dead ends: 12687 [2021-06-05 21:14:25,671 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 172.1ms TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:14:25,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12687 states. [2021-06-05 21:14:25,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12687 to 12380. [2021-06-05 21:14:25,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12380 states, 12379 states have (on average 3.7087002181113173) internal successors, (45910), 12379 states have internal predecessors, (45910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:25,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12380 states to 12380 states and 45910 transitions. [2021-06-05 21:14:25,868 INFO L78 Accepts]: Start accepts. Automaton has 12380 states and 45910 transitions. Word has length 27 [2021-06-05 21:14:25,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:25,868 INFO L482 AbstractCegarLoop]: Abstraction has 12380 states and 45910 transitions. [2021-06-05 21:14:25,868 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:25,868 INFO L276 IsEmpty]: Start isEmpty. Operand 12380 states and 45910 transitions. [2021-06-05 21:14:25,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 21:14:25,889 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:25,889 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:26,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:26,089 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:26,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:26,089 INFO L82 PathProgramCache]: Analyzing trace with hash -179350336, now seen corresponding path program 80 times [2021-06-05 21:14:26,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:26,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390718849] [2021-06-05 21:14:26,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:26,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:26,148 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:26,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:26,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390718849] [2021-06-05 21:14:26,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390718849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:26,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281101275] [2021-06-05 21:14:26,148 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:26,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:14:26,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:14:26,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:14:26,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:26,308 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:26,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281101275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:26,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:26,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 21:14:26,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973827088] [2021-06-05 21:14:26,309 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:14:26,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:26,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:14:26,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:14:26,309 INFO L87 Difference]: Start difference. First operand 12380 states and 45910 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:26,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:26,576 INFO L93 Difference]: Finished difference Result 12574 states and 46469 transitions. [2021-06-05 21:14:26,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:14:26,577 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 21:14:26,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:26,600 INFO L225 Difference]: With dead ends: 12574 [2021-06-05 21:14:26,600 INFO L226 Difference]: Without dead ends: 12552 [2021-06-05 21:14:26,600 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 201.3ms TimeCoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:14:26,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12552 states. [2021-06-05 21:14:26,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12552 to 12373. [2021-06-05 21:14:26,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12373 states, 12372 states have (on average 3.7103136113805366) internal successors, (45904), 12372 states have internal predecessors, (45904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:26,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12373 states to 12373 states and 45904 transitions. [2021-06-05 21:14:26,807 INFO L78 Accepts]: Start accepts. Automaton has 12373 states and 45904 transitions. Word has length 27 [2021-06-05 21:14:26,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:26,807 INFO L482 AbstractCegarLoop]: Abstraction has 12373 states and 45904 transitions. [2021-06-05 21:14:26,807 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:26,807 INFO L276 IsEmpty]: Start isEmpty. Operand 12373 states and 45904 transitions. [2021-06-05 21:14:26,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 21:14:26,824 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:26,824 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:27,025 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-06-05 21:14:27,025 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:27,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:27,025 INFO L82 PathProgramCache]: Analyzing trace with hash 887736380, now seen corresponding path program 81 times [2021-06-05 21:14:27,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:27,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091628038] [2021-06-05 21:14:27,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:27,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:27,080 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:27,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:27,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091628038] [2021-06-05 21:14:27,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091628038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:27,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440283668] [2021-06-05 21:14:27,080 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:27,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:14:27,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:14:27,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:14:27,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:27,235 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:27,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440283668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:27,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:27,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 21:14:27,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130063178] [2021-06-05 21:14:27,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:14:27,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:27,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:14:27,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:14:27,236 INFO L87 Difference]: Start difference. First operand 12373 states and 45904 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:27,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:27,533 INFO L93 Difference]: Finished difference Result 13084 states and 47922 transitions. [2021-06-05 21:14:27,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:14:27,533 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 21:14:27,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:27,561 INFO L225 Difference]: With dead ends: 13084 [2021-06-05 21:14:27,561 INFO L226 Difference]: Without dead ends: 13054 [2021-06-05 21:14:27,561 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 168.1ms TimeCoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:14:27,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13054 states. [2021-06-05 21:14:27,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13054 to 12469. [2021-06-05 21:14:27,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12469 states, 12468 states have (on average 3.7080526146936155) internal successors, (46232), 12468 states have internal predecessors, (46232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:27,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12469 states to 12469 states and 46232 transitions. [2021-06-05 21:14:27,773 INFO L78 Accepts]: Start accepts. Automaton has 12469 states and 46232 transitions. Word has length 27 [2021-06-05 21:14:27,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:27,773 INFO L482 AbstractCegarLoop]: Abstraction has 12469 states and 46232 transitions. [2021-06-05 21:14:27,773 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:27,773 INFO L276 IsEmpty]: Start isEmpty. Operand 12469 states and 46232 transitions. [2021-06-05 21:14:27,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 21:14:27,792 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:27,792 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:27,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-06-05 21:14:27,993 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:27,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:27,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1977991744, now seen corresponding path program 82 times [2021-06-05 21:14:27,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:27,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368946255] [2021-06-05 21:14:27,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:27,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:28,047 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:28,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:28,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368946255] [2021-06-05 21:14:28,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368946255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:28,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545284592] [2021-06-05 21:14:28,048 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:28,071 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:14:28,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:14:28,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:14:28,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:28,186 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:28,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545284592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:28,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:28,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 21:14:28,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668859370] [2021-06-05 21:14:28,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:14:28,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:28,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:14:28,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:14:28,187 INFO L87 Difference]: Start difference. First operand 12469 states and 46232 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:28,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:28,456 INFO L93 Difference]: Finished difference Result 12896 states and 47434 transitions. [2021-06-05 21:14:28,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:14:28,456 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 21:14:28,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:28,480 INFO L225 Difference]: With dead ends: 12896 [2021-06-05 21:14:28,480 INFO L226 Difference]: Without dead ends: 12812 [2021-06-05 21:14:28,480 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 149.1ms TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:14:28,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12812 states. [2021-06-05 21:14:28,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12812 to 12548. [2021-06-05 21:14:28,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12548 states, 12547 states have (on average 3.7084562046704392) internal successors, (46530), 12547 states have internal predecessors, (46530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:28,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12548 states to 12548 states and 46530 transitions. [2021-06-05 21:14:28,661 INFO L78 Accepts]: Start accepts. Automaton has 12548 states and 46530 transitions. Word has length 27 [2021-06-05 21:14:28,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:28,661 INFO L482 AbstractCegarLoop]: Abstraction has 12548 states and 46530 transitions. [2021-06-05 21:14:28,661 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:28,661 INFO L276 IsEmpty]: Start isEmpty. Operand 12548 states and 46530 transitions. [2021-06-05 21:14:28,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 21:14:28,680 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:28,680 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:28,881 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,85 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:28,881 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:28,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:28,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1395187844, now seen corresponding path program 83 times [2021-06-05 21:14:28,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:28,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153359271] [2021-06-05 21:14:28,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:28,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:28,935 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:28,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:28,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153359271] [2021-06-05 21:14:28,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153359271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:28,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941621826] [2021-06-05 21:14:28,936 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:28,963 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:14:28,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:14:28,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:14:28,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:29,092 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:29,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941621826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:29,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:29,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 21:14:29,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203025718] [2021-06-05 21:14:29,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:14:29,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:29,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:14:29,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:14:29,093 INFO L87 Difference]: Start difference. First operand 12548 states and 46530 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:29,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:29,287 INFO L93 Difference]: Finished difference Result 12969 states and 47738 transitions. [2021-06-05 21:14:29,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:14:29,287 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 21:14:29,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:29,314 INFO L225 Difference]: With dead ends: 12969 [2021-06-05 21:14:29,314 INFO L226 Difference]: Without dead ends: 12939 [2021-06-05 21:14:29,314 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 168.4ms TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:14:29,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12939 states. [2021-06-05 21:14:29,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12939 to 12565. [2021-06-05 21:14:29,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12565 states, 12564 states have (on average 3.7117160140082777) internal successors, (46634), 12564 states have internal predecessors, (46634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:29,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12565 states to 12565 states and 46634 transitions. [2021-06-05 21:14:29,519 INFO L78 Accepts]: Start accepts. Automaton has 12565 states and 46634 transitions. Word has length 27 [2021-06-05 21:14:29,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:29,519 INFO L482 AbstractCegarLoop]: Abstraction has 12565 states and 46634 transitions. [2021-06-05 21:14:29,519 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:29,519 INFO L276 IsEmpty]: Start isEmpty. Operand 12565 states and 46634 transitions. [2021-06-05 21:14:29,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 21:14:29,539 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:29,539 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:29,739 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:29,740 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:29,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:29,740 INFO L82 PathProgramCache]: Analyzing trace with hash 1958802428, now seen corresponding path program 84 times [2021-06-05 21:14:29,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:29,740 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295280010] [2021-06-05 21:14:29,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:29,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:29,795 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:29,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:29,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295280010] [2021-06-05 21:14:29,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295280010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:29,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660113920] [2021-06-05 21:14:29,795 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:29,818 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:14:29,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:14:29,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:14:29,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:30,071 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:30,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660113920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:30,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:30,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 21:14:30,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618332422] [2021-06-05 21:14:30,071 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:14:30,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:30,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:14:30,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:14:30,072 INFO L87 Difference]: Start difference. First operand 12565 states and 46634 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:30,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:30,361 INFO L93 Difference]: Finished difference Result 13017 states and 47934 transitions. [2021-06-05 21:14:30,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:14:30,361 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 21:14:30,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:30,386 INFO L225 Difference]: With dead ends: 13017 [2021-06-05 21:14:30,387 INFO L226 Difference]: Without dead ends: 12987 [2021-06-05 21:14:30,387 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 236.8ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:14:30,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12987 states. [2021-06-05 21:14:30,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12987 to 12637. [2021-06-05 21:14:30,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12637 states, 12636 states have (on average 3.7109844887622665) internal successors, (46892), 12636 states have internal predecessors, (46892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:30,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12637 states to 12637 states and 46892 transitions. [2021-06-05 21:14:30,580 INFO L78 Accepts]: Start accepts. Automaton has 12637 states and 46892 transitions. Word has length 27 [2021-06-05 21:14:30,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:30,581 INFO L482 AbstractCegarLoop]: Abstraction has 12637 states and 46892 transitions. [2021-06-05 21:14:30,581 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:30,581 INFO L276 IsEmpty]: Start isEmpty. Operand 12637 states and 46892 transitions. [2021-06-05 21:14:30,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 21:14:30,599 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:30,599 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:30,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:30,800 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:30,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:30,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1037014720, now seen corresponding path program 85 times [2021-06-05 21:14:30,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:30,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000847391] [2021-06-05 21:14:30,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:30,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:30,855 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:30,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:30,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000847391] [2021-06-05 21:14:30,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000847391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:30,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895582188] [2021-06-05 21:14:30,855 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 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:30,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:30,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:14:30,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:30,999 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:31,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895582188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:31,000 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:31,000 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 21:14:31,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233300111] [2021-06-05 21:14:31,000 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:14:31,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:31,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:14:31,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:14:31,000 INFO L87 Difference]: Start difference. First operand 12637 states and 46892 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:31,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:31,254 INFO L93 Difference]: Finished difference Result 13031 states and 47962 transitions. [2021-06-05 21:14:31,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:14:31,254 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 21:14:31,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:31,280 INFO L225 Difference]: With dead ends: 13031 [2021-06-05 21:14:31,280 INFO L226 Difference]: Without dead ends: 12951 [2021-06-05 21:14:31,280 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 175.8ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:14:31,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12951 states. [2021-06-05 21:14:31,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12951 to 12663. [2021-06-05 21:14:31,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12663 states, 12662 states have (on average 3.7132364555362503) internal successors, (47017), 12662 states have internal predecessors, (47017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:31,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12663 states to 12663 states and 47017 transitions. [2021-06-05 21:14:31,493 INFO L78 Accepts]: Start accepts. Automaton has 12663 states and 47017 transitions. Word has length 27 [2021-06-05 21:14:31,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:31,493 INFO L482 AbstractCegarLoop]: Abstraction has 12663 states and 47017 transitions. [2021-06-05 21:14:31,493 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:31,493 INFO L276 IsEmpty]: Start isEmpty. Operand 12663 states and 47017 transitions. [2021-06-05 21:14:31,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 21:14:31,513 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:31,514 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:31,714 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:31,714 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:31,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:31,714 INFO L82 PathProgramCache]: Analyzing trace with hash -1052109376, now seen corresponding path program 86 times [2021-06-05 21:14:31,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:31,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380831996] [2021-06-05 21:14:31,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:31,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:31,773 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:31,773 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:31,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380831996] [2021-06-05 21:14:31,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380831996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:31,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516338965] [2021-06-05 21:14:31,773 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:31,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:14:31,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:14:31,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:14:31,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:31,949 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:31,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516338965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:31,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:31,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 21:14:31,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115579257] [2021-06-05 21:14:31,950 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:14:31,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:31,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:14:31,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:14:31,950 INFO L87 Difference]: Start difference. First operand 12663 states and 47017 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:32,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:32,232 INFO L93 Difference]: Finished difference Result 12828 states and 47506 transitions. [2021-06-05 21:14:32,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:14:32,232 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 21:14:32,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:32,256 INFO L225 Difference]: With dead ends: 12828 [2021-06-05 21:14:32,256 INFO L226 Difference]: Without dead ends: 12813 [2021-06-05 21:14:32,256 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 220.5ms TimeCoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:14:32,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12813 states. [2021-06-05 21:14:32,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12813 to 12651. [2021-06-05 21:14:32,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12651 states, 12650 states have (on average 3.714229249011858) internal successors, (46985), 12650 states have internal predecessors, (46985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:32,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12651 states to 12651 states and 46985 transitions. [2021-06-05 21:14:32,441 INFO L78 Accepts]: Start accepts. Automaton has 12651 states and 46985 transitions. Word has length 27 [2021-06-05 21:14:32,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:32,441 INFO L482 AbstractCegarLoop]: Abstraction has 12651 states and 46985 transitions. [2021-06-05 21:14:32,441 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:32,441 INFO L276 IsEmpty]: Start isEmpty. Operand 12651 states and 46985 transitions. [2021-06-05 21:14:32,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 21:14:32,460 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:32,460 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:32,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:32,661 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:32,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:32,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1489264556, now seen corresponding path program 87 times [2021-06-05 21:14:32,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:32,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670655738] [2021-06-05 21:14:32,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:32,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:32,691 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:14:32,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:32,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670655738] [2021-06-05 21:14:32,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670655738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:32,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861514740] [2021-06-05 21:14:32,693 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:32,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:14:32,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:14:32,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 21:14:32,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:32,783 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 21:14:32,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861514740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:32,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:32,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 21:14:32,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048272039] [2021-06-05 21:14:32,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:14:32,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:32,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:14:32,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:14:32,784 INFO L87 Difference]: Start difference. First operand 12651 states and 46985 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:33,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:33,289 INFO L93 Difference]: Finished difference Result 22245 states and 78518 transitions. [2021-06-05 21:14:33,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 21:14:33,290 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 21:14:33,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:33,328 INFO L225 Difference]: With dead ends: 22245 [2021-06-05 21:14:33,328 INFO L226 Difference]: Without dead ends: 22157 [2021-06-05 21:14:33,328 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 258.6ms TimeCoverageRelationStatistics Valid=386, Invalid=1020, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 21:14:33,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22157 states. [2021-06-05 21:14:33,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22157 to 13996. [2021-06-05 21:14:33,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13996 states, 13995 states have (on average 3.697463379778492) internal successors, (51746), 13995 states have internal predecessors, (51746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:33,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13996 states to 13996 states and 51746 transitions. [2021-06-05 21:14:33,580 INFO L78 Accepts]: Start accepts. Automaton has 13996 states and 51746 transitions. Word has length 29 [2021-06-05 21:14:33,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:33,580 INFO L482 AbstractCegarLoop]: Abstraction has 13996 states and 51746 transitions. [2021-06-05 21:14:33,580 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:33,580 INFO L276 IsEmpty]: Start isEmpty. Operand 13996 states and 51746 transitions. [2021-06-05 21:14:33,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 21:14:33,601 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:33,601 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:33,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:33,801 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:33,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:33,802 INFO L82 PathProgramCache]: Analyzing trace with hash 1582018668, now seen corresponding path program 88 times [2021-06-05 21:14:33,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:33,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382698131] [2021-06-05 21:14:33,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:33,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:33,841 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:14:33,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:33,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382698131] [2021-06-05 21:14:33,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382698131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:33,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058156510] [2021-06-05 21:14:33,841 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:33,864 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:14:33,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:14:33,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 21:14:33,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:33,915 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:14:33,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058156510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:33,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:33,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 21:14:33,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450400947] [2021-06-05 21:14:33,916 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:14:33,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:33,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:14:33,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:14:33,916 INFO L87 Difference]: Start difference. First operand 13996 states and 51746 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:34,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:34,122 INFO L93 Difference]: Finished difference Result 20503 states and 74398 transitions. [2021-06-05 21:14:34,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:14:34,122 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 21:14:34,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:34,162 INFO L225 Difference]: With dead ends: 20503 [2021-06-05 21:14:34,162 INFO L226 Difference]: Without dead ends: 20406 [2021-06-05 21:14:34,162 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 81.1ms TimeCoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:14:34,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20406 states. [2021-06-05 21:14:34,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20406 to 17863. [2021-06-05 21:14:34,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17863 states, 17862 states have (on average 3.743141865412608) internal successors, (66860), 17862 states have internal predecessors, (66860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:34,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17863 states to 17863 states and 66860 transitions. [2021-06-05 21:14:34,481 INFO L78 Accepts]: Start accepts. Automaton has 17863 states and 66860 transitions. Word has length 29 [2021-06-05 21:14:34,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:34,481 INFO L482 AbstractCegarLoop]: Abstraction has 17863 states and 66860 transitions. [2021-06-05 21:14:34,481 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:34,481 INFO L276 IsEmpty]: Start isEmpty. Operand 17863 states and 66860 transitions. [2021-06-05 21:14:34,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 21:14:34,508 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:34,508 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:34,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:34,720 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:34,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:34,720 INFO L82 PathProgramCache]: Analyzing trace with hash -1828893528, now seen corresponding path program 89 times [2021-06-05 21:14:34,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:34,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301929808] [2021-06-05 21:14:34,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:34,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:34,747 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 21:14:34,747 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:34,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301929808] [2021-06-05 21:14:34,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301929808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:34,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261660439] [2021-06-05 21:14:34,747 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:34,771 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:14:34,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:14:34,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 21:14:34,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:34,816 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 21:14:34,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261660439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:34,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:34,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 21:14:34,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099138784] [2021-06-05 21:14:34,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:14:34,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:34,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:14:34,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:14:34,817 INFO L87 Difference]: Start difference. First operand 17863 states and 66860 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:35,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:35,407 INFO L93 Difference]: Finished difference Result 41463 states and 150404 transitions. [2021-06-05 21:14:35,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 21:14:35,408 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 21:14:35,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:35,507 INFO L225 Difference]: With dead ends: 41463 [2021-06-05 21:14:35,507 INFO L226 Difference]: Without dead ends: 40731 [2021-06-05 21:14:35,507 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 253.7ms TimeCoverageRelationStatistics Valid=456, Invalid=1436, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 21:14:35,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40731 states. [2021-06-05 21:14:36,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40731 to 28028. [2021-06-05 21:14:36,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28028 states, 28027 states have (on average 3.774895636350662) internal successors, (105799), 28027 states have internal predecessors, (105799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:36,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28028 states to 28028 states and 105799 transitions. [2021-06-05 21:14:36,273 INFO L78 Accepts]: Start accepts. Automaton has 28028 states and 105799 transitions. Word has length 29 [2021-06-05 21:14:36,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:36,273 INFO L482 AbstractCegarLoop]: Abstraction has 28028 states and 105799 transitions. [2021-06-05 21:14:36,273 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:36,273 INFO L276 IsEmpty]: Start isEmpty. Operand 28028 states and 105799 transitions. [2021-06-05 21:14:36,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 21:14:36,323 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:36,323 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:36,523 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2021-06-05 21:14:36,524 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:36,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:36,524 INFO L82 PathProgramCache]: Analyzing trace with hash 904383528, now seen corresponding path program 90 times [2021-06-05 21:14:36,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:36,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865227176] [2021-06-05 21:14:36,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:36,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:36,553 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:14:36,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:36,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865227176] [2021-06-05 21:14:36,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865227176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:36,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085608785] [2021-06-05 21:14:36,553 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:36,577 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:14:36,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:14:36,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 21:14:36,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:36,640 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:14:36,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085608785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:36,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:36,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 21:14:36,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921329229] [2021-06-05 21:14:36,640 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:14:36,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:36,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:14:36,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:14:36,641 INFO L87 Difference]: Start difference. First operand 28028 states and 105799 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:37,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:37,530 INFO L93 Difference]: Finished difference Result 54693 states and 194613 transitions. [2021-06-05 21:14:37,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 21:14:37,531 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 21:14:37,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:37,678 INFO L225 Difference]: With dead ends: 54693 [2021-06-05 21:14:37,679 INFO L226 Difference]: Without dead ends: 54103 [2021-06-05 21:14:37,679 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1160 ImplicationChecksByTransitivity, 468.3ms TimeCoverageRelationStatistics Valid=805, Invalid=2855, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 21:14:37,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54103 states. [2021-06-05 21:14:38,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54103 to 31277. [2021-06-05 21:14:38,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31277 states, 31276 states have (on average 3.7364432791917124) internal successors, (116861), 31276 states have internal predecessors, (116861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:38,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31277 states to 31277 states and 116861 transitions. [2021-06-05 21:14:38,742 INFO L78 Accepts]: Start accepts. Automaton has 31277 states and 116861 transitions. Word has length 29 [2021-06-05 21:14:38,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:38,742 INFO L482 AbstractCegarLoop]: Abstraction has 31277 states and 116861 transitions. [2021-06-05 21:14:38,743 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:38,743 INFO L276 IsEmpty]: Start isEmpty. Operand 31277 states and 116861 transitions. [2021-06-05 21:14:38,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 21:14:38,801 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:38,801 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:39,001 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:39,001 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:39,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:39,001 INFO L82 PathProgramCache]: Analyzing trace with hash 816620900, now seen corresponding path program 91 times [2021-06-05 21:14:39,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:39,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792427772] [2021-06-05 21:14:39,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:39,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:39,213 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 6 [2021-06-05 21:14:39,240 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:14:39,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:39,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792427772] [2021-06-05 21:14:39,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792427772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:39,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82504076] [2021-06-05 21:14:39,240 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 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:39,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:39,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 21:14:39,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:39,325 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:14:39,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82504076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:39,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:39,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 8 [2021-06-05 21:14:39,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631148905] [2021-06-05 21:14:39,325 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:14:39,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:39,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:14:39,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:14:39,326 INFO L87 Difference]: Start difference. First operand 31277 states and 116861 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:39,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:39,697 INFO L93 Difference]: Finished difference Result 41400 states and 152146 transitions. [2021-06-05 21:14:39,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:14:39,697 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 21:14:39,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:39,794 INFO L225 Difference]: With dead ends: 41400 [2021-06-05 21:14:39,794 INFO L226 Difference]: Without dead ends: 41184 [2021-06-05 21:14:39,794 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 46.9ms TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:14:39,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41184 states. [2021-06-05 21:14:40,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41184 to 36746. [2021-06-05 21:14:40,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36746 states, 36745 states have (on average 3.781221934957137) internal successors, (138941), 36745 states have internal predecessors, (138941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:40,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36746 states to 36746 states and 138941 transitions. [2021-06-05 21:14:40,592 INFO L78 Accepts]: Start accepts. Automaton has 36746 states and 138941 transitions. Word has length 29 [2021-06-05 21:14:40,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:40,592 INFO L482 AbstractCegarLoop]: Abstraction has 36746 states and 138941 transitions. [2021-06-05 21:14:40,592 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:40,592 INFO L276 IsEmpty]: Start isEmpty. Operand 36746 states and 138941 transitions. [2021-06-05 21:14:40,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 21:14:40,651 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:40,651 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:40,851 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-06-05 21:14:40,851 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:40,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:40,851 INFO L82 PathProgramCache]: Analyzing trace with hash -1324656412, now seen corresponding path program 92 times [2021-06-05 21:14:40,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:40,851 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465647620] [2021-06-05 21:14:40,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:40,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:40,870 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:14:40,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:40,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465647620] [2021-06-05 21:14:40,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465647620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:40,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767141224] [2021-06-05 21:14:40,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:40,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:14:40,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:14:40,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 21:14:40,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:40,944 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:14:40,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767141224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:40,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:40,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-05 21:14:40,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065945557] [2021-06-05 21:14:40,945 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:14:40,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:40,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:14:40,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:14:40,945 INFO L87 Difference]: Start difference. First operand 36746 states and 138941 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:42,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:42,137 INFO L93 Difference]: Finished difference Result 60231 states and 218468 transitions. [2021-06-05 21:14:42,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 21:14:42,137 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 21:14:42,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:42,284 INFO L225 Difference]: With dead ends: 60231 [2021-06-05 21:14:42,284 INFO L226 Difference]: Without dead ends: 59842 [2021-06-05 21:14:42,285 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1314 ImplicationChecksByTransitivity, 429.6ms TimeCoverageRelationStatistics Valid=780, Invalid=2880, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 21:14:42,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59842 states. [2021-06-05 21:14:43,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59842 to 45321. [2021-06-05 21:14:43,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45321 states, 45320 states have (on average 3.791306266548985) internal successors, (171822), 45320 states have internal predecessors, (171822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:43,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45321 states to 45321 states and 171822 transitions. [2021-06-05 21:14:43,375 INFO L78 Accepts]: Start accepts. Automaton has 45321 states and 171822 transitions. Word has length 29 [2021-06-05 21:14:43,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:43,375 INFO L482 AbstractCegarLoop]: Abstraction has 45321 states and 171822 transitions. [2021-06-05 21:14:43,375 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:43,375 INFO L276 IsEmpty]: Start isEmpty. Operand 45321 states and 171822 transitions. [2021-06-05 21:14:43,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 21:14:43,444 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:43,444 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:43,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:43,644 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:43,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:43,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1852635552, now seen corresponding path program 93 times [2021-06-05 21:14:43,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:43,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268721056] [2021-06-05 21:14:43,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:43,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:43,667 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:14:43,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:43,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268721056] [2021-06-05 21:14:43,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268721056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:43,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48007147] [2021-06-05 21:14:43,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:43,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 21:14:43,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:14:43,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 21:14:43,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:43,746 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:14:43,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48007147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:43,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:43,746 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-05 21:14:43,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286213080] [2021-06-05 21:14:43,746 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:14:43,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:43,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:14:43,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:14:43,747 INFO L87 Difference]: Start difference. First operand 45321 states and 171822 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:43,986 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2021-06-05 21:14:44,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:44,943 INFO L93 Difference]: Finished difference Result 61448 states and 220290 transitions. [2021-06-05 21:14:44,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 21:14:44,943 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 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 29 [2021-06-05 21:14:44,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:45,107 INFO L225 Difference]: With dead ends: 61448 [2021-06-05 21:14:45,108 INFO L226 Difference]: Without dead ends: 61268 [2021-06-05 21:14:45,108 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1282 ImplicationChecksByTransitivity, 593.7ms TimeCoverageRelationStatistics Valid=767, Invalid=2893, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 21:14:45,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61268 states. [2021-06-05 21:14:46,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61268 to 46515. [2021-06-05 21:14:46,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46515 states, 46514 states have (on average 3.783893021455906) internal successors, (176004), 46514 states have internal predecessors, (176004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:46,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46515 states to 46515 states and 176004 transitions. [2021-06-05 21:14:46,522 INFO L78 Accepts]: Start accepts. Automaton has 46515 states and 176004 transitions. Word has length 29 [2021-06-05 21:14:46,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:46,522 INFO L482 AbstractCegarLoop]: Abstraction has 46515 states and 176004 transitions. [2021-06-05 21:14:46,522 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:46,522 INFO L276 IsEmpty]: Start isEmpty. Operand 46515 states and 176004 transitions. [2021-06-05 21:14:46,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 21:14:46,605 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:46,605 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:46,805 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-06-05 21:14:46,805 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:46,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:46,805 INFO L82 PathProgramCache]: Analyzing trace with hash -505873000, now seen corresponding path program 94 times [2021-06-05 21:14:46,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:46,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725596873] [2021-06-05 21:14:46,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:46,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:46,824 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:14:46,825 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:46,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725596873] [2021-06-05 21:14:46,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725596873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:46,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364233055] [2021-06-05 21:14:46,825 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:46,848 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:14:46,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:14:46,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 21:14:46,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:46,888 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 21:14:46,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364233055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:46,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:46,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 21:14:46,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517196935] [2021-06-05 21:14:46,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:14:46,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:46,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:14:46,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:14:46,889 INFO L87 Difference]: Start difference. First operand 46515 states and 176004 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:47,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:47,449 INFO L93 Difference]: Finished difference Result 58737 states and 220575 transitions. [2021-06-05 21:14:47,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:14:47,449 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 21:14:47,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:47,612 INFO L225 Difference]: With dead ends: 58737 [2021-06-05 21:14:47,613 INFO L226 Difference]: Without dead ends: 58715 [2021-06-05 21:14:47,613 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 26.5ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:14:47,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58715 states. [2021-06-05 21:14:48,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58715 to 54562. [2021-06-05 21:14:48,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54562 states, 54561 states have (on average 3.806143582412346) internal successors, (207667), 54561 states have internal predecessors, (207667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:48,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54562 states to 54562 states and 207667 transitions. [2021-06-05 21:14:48,889 INFO L78 Accepts]: Start accepts. Automaton has 54562 states and 207667 transitions. Word has length 29 [2021-06-05 21:14:48,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:48,889 INFO L482 AbstractCegarLoop]: Abstraction has 54562 states and 207667 transitions. [2021-06-05 21:14:48,889 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:48,889 INFO L276 IsEmpty]: Start isEmpty. Operand 54562 states and 207667 transitions. [2021-06-05 21:14:48,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 21:14:48,971 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:48,971 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:49,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-06-05 21:14:49,173 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:49,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:49,173 INFO L82 PathProgramCache]: Analyzing trace with hash -2054404452, now seen corresponding path program 95 times [2021-06-05 21:14:49,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:49,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353323236] [2021-06-05 21:14:49,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:49,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:49,191 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:14:49,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:49,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353323236] [2021-06-05 21:14:49,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353323236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:49,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760383817] [2021-06-05 21:14:49,191 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:49,215 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:14:49,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:14:49,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 21:14:49,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:49,264 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:14:49,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760383817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:49,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:49,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-05 21:14:49,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082801469] [2021-06-05 21:14:49,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:14:49,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:49,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:14:49,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:14:49,265 INFO L87 Difference]: Start difference. First operand 54562 states and 207667 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:50,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:50,922 INFO L93 Difference]: Finished difference Result 79748 states and 284600 transitions. [2021-06-05 21:14:50,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-06-05 21:14:50,922 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 21:14:50,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:51,110 INFO L225 Difference]: With dead ends: 79748 [2021-06-05 21:14:51,110 INFO L226 Difference]: Without dead ends: 79619 [2021-06-05 21:14:51,111 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2496 ImplicationChecksByTransitivity, 869.3ms TimeCoverageRelationStatistics Valid=1227, Invalid=5093, Unknown=0, NotChecked=0, Total=6320 [2021-06-05 21:14:51,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79619 states. [2021-06-05 21:14:52,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79619 to 55774. [2021-06-05 21:14:52,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55774 states, 55773 states have (on average 3.7706954978215266) internal successors, (210303), 55773 states have internal predecessors, (210303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:52,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55774 states to 55774 states and 210303 transitions. [2021-06-05 21:14:52,658 INFO L78 Accepts]: Start accepts. Automaton has 55774 states and 210303 transitions. Word has length 29 [2021-06-05 21:14:52,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:52,658 INFO L482 AbstractCegarLoop]: Abstraction has 55774 states and 210303 transitions. [2021-06-05 21:14:52,658 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:52,658 INFO L276 IsEmpty]: Start isEmpty. Operand 55774 states and 210303 transitions. [2021-06-05 21:14:52,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 21:14:52,741 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:52,741 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:52,942 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-06-05 21:14:52,942 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:52,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:52,943 INFO L82 PathProgramCache]: Analyzing trace with hash 1716737040, now seen corresponding path program 96 times [2021-06-05 21:14:52,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:52,943 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295515919] [2021-06-05 21:14:52,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:52,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:52,974 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:14:52,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:52,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295515919] [2021-06-05 21:14:52,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295515919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:52,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825000474] [2021-06-05 21:14:52,974 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:53,000 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:14:53,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:14:53,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 21:14:53,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:53,242 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2021-06-05 21:14:53,244 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:14:53,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825000474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:53,244 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:53,244 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 8 [2021-06-05 21:14:53,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118264650] [2021-06-05 21:14:53,244 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:14:53,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:53,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:14:53,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:14:53,245 INFO L87 Difference]: Start difference. First operand 55774 states and 210303 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:53,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:53,701 INFO L93 Difference]: Finished difference Result 60437 states and 224551 transitions. [2021-06-05 21:14:53,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:14:53,701 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 21:14:53,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:53,874 INFO L225 Difference]: With dead ends: 60437 [2021-06-05 21:14:53,874 INFO L226 Difference]: Without dead ends: 60405 [2021-06-05 21:14:53,875 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 66.7ms TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:14:53,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60405 states. [2021-06-05 21:14:54,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60405 to 49962. [2021-06-05 21:14:54,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49962 states, 49961 states have (on average 3.74323972698705) internal successors, (187016), 49961 states have internal predecessors, (187016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:55,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49962 states to 49962 states and 187016 transitions. [2021-06-05 21:14:55,336 INFO L78 Accepts]: Start accepts. Automaton has 49962 states and 187016 transitions. Word has length 29 [2021-06-05 21:14:55,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:55,336 INFO L482 AbstractCegarLoop]: Abstraction has 49962 states and 187016 transitions. [2021-06-05 21:14:55,336 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:55,336 INFO L276 IsEmpty]: Start isEmpty. Operand 49962 states and 187016 transitions. [2021-06-05 21:14:55,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 21:14:55,408 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:55,408 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:55,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:55,609 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:55,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:55,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1220322522, now seen corresponding path program 97 times [2021-06-05 21:14:55,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:55,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595491441] [2021-06-05 21:14:55,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:55,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:55,633 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:14:55,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:55,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595491441] [2021-06-05 21:14:55,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595491441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:55,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277011014] [2021-06-05 21:14:55,633 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 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:55,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:55,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 21:14:55,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:55,689 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:14:55,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277011014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:55,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:55,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-06-05 21:14:55,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133196749] [2021-06-05 21:14:55,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:14:55,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:55,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:14:55,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:14:55,690 INFO L87 Difference]: Start difference. First operand 49962 states and 187016 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:56,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:56,029 INFO L93 Difference]: Finished difference Result 60595 states and 223581 transitions. [2021-06-05 21:14:56,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:14:56,030 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 21:14:56,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:56,185 INFO L225 Difference]: With dead ends: 60595 [2021-06-05 21:14:56,185 INFO L226 Difference]: Without dead ends: 60532 [2021-06-05 21:14:56,185 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 32.7ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:14:56,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60532 states. [2021-06-05 21:14:57,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60532 to 55220. [2021-06-05 21:14:57,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55220 states, 55219 states have (on average 3.765171408392039) internal successors, (207909), 55219 states have internal predecessors, (207909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:57,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55220 states to 55220 states and 207909 transitions. [2021-06-05 21:14:57,663 INFO L78 Accepts]: Start accepts. Automaton has 55220 states and 207909 transitions. Word has length 29 [2021-06-05 21:14:57,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:57,663 INFO L482 AbstractCegarLoop]: Abstraction has 55220 states and 207909 transitions. [2021-06-05 21:14:57,663 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:57,663 INFO L276 IsEmpty]: Start isEmpty. Operand 55220 states and 207909 transitions. [2021-06-05 21:14:57,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 21:14:57,759 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:57,759 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:57,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-06-05 21:14:57,961 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:57,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:57,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1949620774, now seen corresponding path program 98 times [2021-06-05 21:14:57,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:57,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602042502] [2021-06-05 21:14:57,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:57,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:57,981 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:14:57,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:57,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602042502] [2021-06-05 21:14:57,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602042502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:57,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188491480] [2021-06-05 21:14:57,981 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:58,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:14:58,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:14:58,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 21:14:58,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:58,064 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:14:58,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188491480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:58,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:58,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-05 21:14:58,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545545881] [2021-06-05 21:14:58,064 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:14:58,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:58,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:14:58,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:14:58,065 INFO L87 Difference]: Start difference. First operand 55220 states and 207909 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:59,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:59,278 INFO L93 Difference]: Finished difference Result 66898 states and 242065 transitions. [2021-06-05 21:14:59,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 21:14:59,278 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 21:14:59,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:59,462 INFO L225 Difference]: With dead ends: 66898 [2021-06-05 21:14:59,462 INFO L226 Difference]: Without dead ends: 66524 [2021-06-05 21:14:59,463 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1195 ImplicationChecksByTransitivity, 411.6ms TimeCoverageRelationStatistics Valid=684, Invalid=2738, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 21:14:59,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66524 states. [2021-06-05 21:15:00,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66524 to 50787. [2021-06-05 21:15:00,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50787 states, 50786 states have (on average 3.7521167250817156) internal successors, (190555), 50786 states have internal predecessors, (190555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:00,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50787 states to 50787 states and 190555 transitions. [2021-06-05 21:15:00,817 INFO L78 Accepts]: Start accepts. Automaton has 50787 states and 190555 transitions. Word has length 29 [2021-06-05 21:15:00,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:15:00,817 INFO L482 AbstractCegarLoop]: Abstraction has 50787 states and 190555 transitions. [2021-06-05 21:15:00,817 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:00,817 INFO L276 IsEmpty]: Start isEmpty. Operand 50787 states and 190555 transitions. [2021-06-05 21:15:00,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 21:15:00,889 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:15:00,889 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:15:01,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:15:01,089 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:15:01,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:15:01,090 INFO L82 PathProgramCache]: Analyzing trace with hash -315726062, now seen corresponding path program 99 times [2021-06-05 21:15:01,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:15:01,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305154214] [2021-06-05 21:15:01,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:15:01,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:15:01,351 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:15:01,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:15:01,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305154214] [2021-06-05 21:15:01,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305154214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:01,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512177143] [2021-06-05 21:15:01,352 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:15:01,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:15:01,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:15:01,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 21:15:01,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:15:01,453 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:15:01,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512177143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:01,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:15:01,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-06-05 21:15:01,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93363046] [2021-06-05 21:15:01,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:15:01,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:15:01,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:15:01,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:15:01,454 INFO L87 Difference]: Start difference. First operand 50787 states and 190555 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 21:15:02,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:15:02,537 INFO L93 Difference]: Finished difference Result 100609 states and 369514 transitions. [2021-06-05 21:15:02,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 21:15:02,542 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 29 [2021-06-05 21:15:02,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:15:03,144 INFO L225 Difference]: With dead ends: 100609 [2021-06-05 21:15:03,144 INFO L226 Difference]: Without dead ends: 100210 [2021-06-05 21:15:03,144 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 917 ImplicationChecksByTransitivity, 611.7ms TimeCoverageRelationStatistics Valid=657, Invalid=2205, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 21:15:03,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100210 states. [2021-06-05 21:15:04,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100210 to 73794. [2021-06-05 21:15:04,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73794 states, 73793 states have (on average 3.8082744975810714) internal successors, (281024), 73793 states have internal predecessors, (281024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:05,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73794 states to 73794 states and 281024 transitions. [2021-06-05 21:15:05,435 INFO L78 Accepts]: Start accepts. Automaton has 73794 states and 281024 transitions. Word has length 29 [2021-06-05 21:15:05,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:15:05,435 INFO L482 AbstractCegarLoop]: Abstraction has 73794 states and 281024 transitions. [2021-06-05 21:15:05,435 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 21:15:05,435 INFO L276 IsEmpty]: Start isEmpty. Operand 73794 states and 281024 transitions. [2021-06-05 21:15:05,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 21:15:05,604 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:15:05,604 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:15:05,805 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-06-05 21:15:05,805 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:15:05,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:15:05,805 INFO L82 PathProgramCache]: Analyzing trace with hash 471519794, now seen corresponding path program 100 times [2021-06-05 21:15:05,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:15:05,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934284737] [2021-06-05 21:15:05,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:15:05,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:15:05,826 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:15:05,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:15:05,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934284737] [2021-06-05 21:15:05,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934284737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:05,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073201703] [2021-06-05 21:15:05,827 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:15:05,850 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:15:05,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:15:05,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 21:15:05,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:15:05,900 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:15:05,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073201703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:05,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:15:05,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-06-05 21:15:05,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950775493] [2021-06-05 21:15:05,901 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:15:05,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:15:05,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:15:05,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:15:05,901 INFO L87 Difference]: Start difference. First operand 73794 states and 281024 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:07,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:15:07,482 INFO L93 Difference]: Finished difference Result 102298 states and 373018 transitions. [2021-06-05 21:15:07,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 21:15:07,482 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 21:15:07,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:15:07,766 INFO L225 Difference]: With dead ends: 102298 [2021-06-05 21:15:07,767 INFO L226 Difference]: Without dead ends: 101158 [2021-06-05 21:15:07,767 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1327 ImplicationChecksByTransitivity, 445.8ms TimeCoverageRelationStatistics Valid=821, Invalid=2961, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 21:15:07,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101158 states. [2021-06-05 21:15:09,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101158 to 73287. [2021-06-05 21:15:09,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73287 states, 73286 states have (on average 3.7827825232650163) internal successors, (277225), 73286 states have internal predecessors, (277225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:10,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73287 states to 73287 states and 277225 transitions. [2021-06-05 21:15:10,118 INFO L78 Accepts]: Start accepts. Automaton has 73287 states and 277225 transitions. Word has length 29 [2021-06-05 21:15:10,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:15:10,119 INFO L482 AbstractCegarLoop]: Abstraction has 73287 states and 277225 transitions. [2021-06-05 21:15:10,119 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:10,119 INFO L276 IsEmpty]: Start isEmpty. Operand 73287 states and 277225 transitions. [2021-06-05 21:15:10,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 21:15:10,230 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:15:10,230 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:15:10,431 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:15:10,431 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:15:10,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:15:10,431 INFO L82 PathProgramCache]: Analyzing trace with hash 353639198, now seen corresponding path program 101 times [2021-06-05 21:15:10,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:15:10,431 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459231186] [2021-06-05 21:15:10,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:15:10,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:15:10,458 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:15:10,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:15:10,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459231186] [2021-06-05 21:15:10,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459231186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:10,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466640106] [2021-06-05 21:15:10,459 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:15:10,483 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:15:10,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:15:10,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 21:15:10,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:15:10,521 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:15:10,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466640106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:10,521 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:15:10,521 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-06-05 21:15:10,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627342956] [2021-06-05 21:15:10,521 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:15:10,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:15:10,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:15:10,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:15:10,522 INFO L87 Difference]: Start difference. First operand 73287 states and 277225 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:10,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:15:10,993 INFO L93 Difference]: Finished difference Result 82707 states and 304326 transitions. [2021-06-05 21:15:10,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:15:10,994 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 21:15:10,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:15:11,568 INFO L225 Difference]: With dead ends: 82707 [2021-06-05 21:15:11,576 INFO L226 Difference]: Without dead ends: 82617 [2021-06-05 21:15:11,576 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 59.4ms TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:15:11,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82617 states. [2021-06-05 21:15:12,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82617 to 73144. [2021-06-05 21:15:12,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73144 states, 73143 states have (on average 3.754234855010049) internal successors, (274596), 73143 states have internal predecessors, (274596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:13,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73144 states to 73144 states and 274596 transitions. [2021-06-05 21:15:13,070 INFO L78 Accepts]: Start accepts. Automaton has 73144 states and 274596 transitions. Word has length 29 [2021-06-05 21:15:13,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:15:13,070 INFO L482 AbstractCegarLoop]: Abstraction has 73144 states and 274596 transitions. [2021-06-05 21:15:13,070 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:13,070 INFO L276 IsEmpty]: Start isEmpty. Operand 73144 states and 274596 transitions. [2021-06-05 21:15:13,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 21:15:13,189 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:15:13,189 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:15:13,390 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:15:13,390 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:15:13,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:15:13,390 INFO L82 PathProgramCache]: Analyzing trace with hash 1372869486, now seen corresponding path program 102 times [2021-06-05 21:15:13,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:15:13,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591888192] [2021-06-05 21:15:13,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:15:13,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:15:13,446 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:15:13,446 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:15:13,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591888192] [2021-06-05 21:15:13,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591888192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:13,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370903433] [2021-06-05 21:15:13,447 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:15:13,477 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:15:13,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:15:13,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 21:15:13,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:15:13,547 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:15:13,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370903433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:13,547 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:15:13,547 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-06-05 21:15:13,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794756290] [2021-06-05 21:15:13,547 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:15:13,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:15:13,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:15:13,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:15:13,548 INFO L87 Difference]: Start difference. First operand 73144 states and 274596 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:14,358 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 9 DAG size of output: 6 [2021-06-05 21:15:15,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:15:15,158 INFO L93 Difference]: Finished difference Result 90454 states and 327992 transitions. [2021-06-05 21:15:15,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 21:15:15,159 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 21:15:15,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:15:15,420 INFO L225 Difference]: With dead ends: 90454 [2021-06-05 21:15:15,420 INFO L226 Difference]: Without dead ends: 89724 [2021-06-05 21:15:15,420 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1695 ImplicationChecksByTransitivity, 820.4ms TimeCoverageRelationStatistics Valid=908, Invalid=3784, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 21:15:15,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89724 states. [2021-06-05 21:15:17,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89724 to 72523. [2021-06-05 21:15:17,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72523 states, 72522 states have (on average 3.7569427208295414) internal successors, (272461), 72522 states have internal predecessors, (272461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:17,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72523 states to 72523 states and 272461 transitions. [2021-06-05 21:15:17,468 INFO L78 Accepts]: Start accepts. Automaton has 72523 states and 272461 transitions. Word has length 29 [2021-06-05 21:15:17,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:15:17,468 INFO L482 AbstractCegarLoop]: Abstraction has 72523 states and 272461 transitions. [2021-06-05 21:15:17,468 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:17,468 INFO L276 IsEmpty]: Start isEmpty. Operand 72523 states and 272461 transitions. [2021-06-05 21:15:17,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 21:15:17,589 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:15:17,589 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:15:17,790 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable110 [2021-06-05 21:15:17,790 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:15:17,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:15:17,790 INFO L82 PathProgramCache]: Analyzing trace with hash 351112822, now seen corresponding path program 103 times [2021-06-05 21:15:17,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:15:17,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118556976] [2021-06-05 21:15:17,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:15:17,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:15:17,809 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:15:17,809 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:15:17,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118556976] [2021-06-05 21:15:17,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118556976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:17,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051703182] [2021-06-05 21:15:17,809 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:15:17,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:15:17,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 21:15:17,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:15:17,881 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:15:17,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051703182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:17,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:15:17,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 21:15:17,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975866555] [2021-06-05 21:15:17,882 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:15:17,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:15:17,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:15:17,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:15:17,882 INFO L87 Difference]: Start difference. First operand 72523 states and 272461 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:18,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:15:18,350 INFO L93 Difference]: Finished difference Result 85882 states and 320374 transitions. [2021-06-05 21:15:18,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:15:18,350 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 21:15:18,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:15:18,607 INFO L225 Difference]: With dead ends: 85882 [2021-06-05 21:15:18,608 INFO L226 Difference]: Without dead ends: 85852 [2021-06-05 21:15:18,608 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 25.4ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:15:19,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85852 states. [2021-06-05 21:15:20,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85852 to 81497. [2021-06-05 21:15:20,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81497 states, 81496 states have (on average 3.7722342200844214) internal successors, (307422), 81496 states have internal predecessors, (307422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:20,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81497 states to 81497 states and 307422 transitions. [2021-06-05 21:15:20,708 INFO L78 Accepts]: Start accepts. Automaton has 81497 states and 307422 transitions. Word has length 29 [2021-06-05 21:15:20,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:15:20,708 INFO L482 AbstractCegarLoop]: Abstraction has 81497 states and 307422 transitions. [2021-06-05 21:15:20,708 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:20,708 INFO L276 IsEmpty]: Start isEmpty. Operand 81497 states and 307422 transitions. [2021-06-05 21:15:20,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 21:15:20,846 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:15:20,846 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:15:21,047 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-06-05 21:15:21,047 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:15:21,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:15:21,048 INFO L82 PathProgramCache]: Analyzing trace with hash 1495713142, now seen corresponding path program 104 times [2021-06-05 21:15:21,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:15:21,048 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957464715] [2021-06-05 21:15:21,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:15:21,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:15:21,066 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:15:21,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:15:21,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957464715] [2021-06-05 21:15:21,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957464715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:21,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985913193] [2021-06-05 21:15:21,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:15:21,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:15:21,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:15:21,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 21:15:21,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:15:21,131 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:15:21,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985913193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:21,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:15:21,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 21:15:21,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836551196] [2021-06-05 21:15:21,131 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:15:21,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:15:21,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:15:21,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:15:21,132 INFO L87 Difference]: Start difference. First operand 81497 states and 307422 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:21,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:15:21,995 INFO L93 Difference]: Finished difference Result 90964 states and 338142 transitions. [2021-06-05 21:15:21,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:15:21,995 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 21:15:21,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:15:22,253 INFO L225 Difference]: With dead ends: 90964 [2021-06-05 21:15:22,254 INFO L226 Difference]: Without dead ends: 90951 [2021-06-05 21:15:22,254 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 32.5ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:15:22,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90951 states. [2021-06-05 21:15:23,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90951 to 81689. [2021-06-05 21:15:23,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81689 states, 81688 states have (on average 3.771067965919107) internal successors, (308051), 81688 states have internal predecessors, (308051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:24,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81689 states to 81689 states and 308051 transitions. [2021-06-05 21:15:24,084 INFO L78 Accepts]: Start accepts. Automaton has 81689 states and 308051 transitions. Word has length 29 [2021-06-05 21:15:24,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:15:24,084 INFO L482 AbstractCegarLoop]: Abstraction has 81689 states and 308051 transitions. [2021-06-05 21:15:24,085 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:24,085 INFO L276 IsEmpty]: Start isEmpty. Operand 81689 states and 308051 transitions. [2021-06-05 21:15:24,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 21:15:24,593 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:15:24,593 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:15:24,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:15:24,808 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:15:24,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:15:24,809 INFO L82 PathProgramCache]: Analyzing trace with hash 22394150, now seen corresponding path program 105 times [2021-06-05 21:15:24,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:15:24,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935421410] [2021-06-05 21:15:24,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:15:24,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:15:24,852 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:15:24,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:15:24,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935421410] [2021-06-05 21:15:24,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935421410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:24,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246200556] [2021-06-05 21:15:24,852 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:15:24,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 21:15:24,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:15:24,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 21:15:24,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:15:24,962 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:15:24,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246200556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:24,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:15:24,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 21:15:24,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96611618] [2021-06-05 21:15:24,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:15:24,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:15:24,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:15:24,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:15:24,963 INFO L87 Difference]: Start difference. First operand 81689 states and 308051 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:26,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:15:26,272 INFO L93 Difference]: Finished difference Result 117029 states and 423344 transitions. [2021-06-05 21:15:26,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 21:15:26,281 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 21:15:26,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:15:26,992 INFO L225 Difference]: With dead ends: 117029 [2021-06-05 21:15:26,993 INFO L226 Difference]: Without dead ends: 116821 [2021-06-05 21:15:26,993 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1770 ImplicationChecksByTransitivity, 523.7ms TimeCoverageRelationStatistics Valid=957, Invalid=3873, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 21:15:27,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116821 states. [2021-06-05 21:15:28,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116821 to 82052. [2021-06-05 21:15:28,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82052 states, 82051 states have (on average 3.7600882378033176) internal successors, (308519), 82051 states have internal predecessors, (308519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:29,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82052 states to 82052 states and 308519 transitions. [2021-06-05 21:15:29,113 INFO L78 Accepts]: Start accepts. Automaton has 82052 states and 308519 transitions. Word has length 29 [2021-06-05 21:15:29,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:15:29,113 INFO L482 AbstractCegarLoop]: Abstraction has 82052 states and 308519 transitions. [2021-06-05 21:15:29,113 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:29,113 INFO L276 IsEmpty]: Start isEmpty. Operand 82052 states and 308519 transitions. [2021-06-05 21:15:29,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 21:15:29,256 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:15:29,256 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:15:29,457 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-06-05 21:15:29,457 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:15:29,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:15:29,457 INFO L82 PathProgramCache]: Analyzing trace with hash 954640786, now seen corresponding path program 106 times [2021-06-05 21:15:29,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:15:29,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338603122] [2021-06-05 21:15:29,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:15:29,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:15:29,504 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:15:29,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:15:29,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338603122] [2021-06-05 21:15:29,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338603122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:29,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853696499] [2021-06-05 21:15:29,505 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:15:29,874 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:15:29,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:15:29,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 21:15:29,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:15:29,956 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:15:29,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853696499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:29,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:15:29,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-06-05 21:15:29,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046845665] [2021-06-05 21:15:29,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:15:29,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:15:29,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:15:29,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:15:29,957 INFO L87 Difference]: Start difference. First operand 82052 states and 308519 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:30,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:15:30,456 INFO L93 Difference]: Finished difference Result 86807 states and 321949 transitions. [2021-06-05 21:15:30,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:15:30,457 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 21:15:30,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:15:30,694 INFO L225 Difference]: With dead ends: 86807 [2021-06-05 21:15:30,694 INFO L226 Difference]: Without dead ends: 86624 [2021-06-05 21:15:30,694 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 65.5ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:15:30,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86624 states. [2021-06-05 21:15:32,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86624 to 81742. [2021-06-05 21:15:32,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81742 states, 81741 states have (on average 3.760120380225346) internal successors, (307356), 81741 states have internal predecessors, (307356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:32,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81742 states to 81742 states and 307356 transitions. [2021-06-05 21:15:32,829 INFO L78 Accepts]: Start accepts. Automaton has 81742 states and 307356 transitions. Word has length 29 [2021-06-05 21:15:32,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:15:32,829 INFO L482 AbstractCegarLoop]: Abstraction has 81742 states and 307356 transitions. [2021-06-05 21:15:32,829 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:32,829 INFO L276 IsEmpty]: Start isEmpty. Operand 81742 states and 307356 transitions. [2021-06-05 21:15:32,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 21:15:32,972 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:15:32,972 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:15:33,173 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-06-05 21:15:33,173 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:15:33,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:15:33,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1306191286, now seen corresponding path program 107 times [2021-06-05 21:15:33,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:15:33,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592933948] [2021-06-05 21:15:33,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:15:33,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:15:33,215 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:15:33,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:15:33,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592933948] [2021-06-05 21:15:33,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592933948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:33,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253961629] [2021-06-05 21:15:33,215 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:15:33,246 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:15:33,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:15:33,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 21:15:33,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:15:33,308 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:15:33,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253961629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:33,308 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:15:33,308 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-06-05 21:15:33,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608102354] [2021-06-05 21:15:33,309 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:15:33,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:15:33,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:15:33,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:15:33,309 INFO L87 Difference]: Start difference. First operand 81742 states and 307356 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:33,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:15:33,955 INFO L93 Difference]: Finished difference Result 105120 states and 389933 transitions. [2021-06-05 21:15:33,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:15:33,955 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 21:15:33,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:15:34,276 INFO L225 Difference]: With dead ends: 105120 [2021-06-05 21:15:34,276 INFO L226 Difference]: Without dead ends: 104966 [2021-06-05 21:15:34,276 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 91.0ms TimeCoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:15:34,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104966 states. [2021-06-05 21:15:36,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104966 to 90971. [2021-06-05 21:15:36,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90971 states, 90970 states have (on average 3.763823238430252) internal successors, (342395), 90970 states have internal predecessors, (342395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:36,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90971 states to 90971 states and 342395 transitions. [2021-06-05 21:15:36,768 INFO L78 Accepts]: Start accepts. Automaton has 90971 states and 342395 transitions. Word has length 29 [2021-06-05 21:15:36,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:15:36,768 INFO L482 AbstractCegarLoop]: Abstraction has 90971 states and 342395 transitions. [2021-06-05 21:15:36,768 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:36,769 INFO L276 IsEmpty]: Start isEmpty. Operand 90971 states and 342395 transitions. [2021-06-05 21:15:36,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 21:15:36,928 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:15:36,928 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:15:37,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-06-05 21:15:37,141 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:15:37,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:15:37,141 INFO L82 PathProgramCache]: Analyzing trace with hash -136054070, now seen corresponding path program 108 times [2021-06-05 21:15:37,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:15:37,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357597190] [2021-06-05 21:15:37,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:15:37,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:15:37,173 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:15:37,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:15:37,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357597190] [2021-06-05 21:15:37,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357597190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:37,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797215863] [2021-06-05 21:15:37,174 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:15:37,197 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:15:37,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:15:37,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 21:15:37,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:15:37,257 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:15:37,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797215863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:37,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:15:37,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 13 [2021-06-05 21:15:37,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482180681] [2021-06-05 21:15:37,257 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:15:37,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:15:37,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:15:37,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:15:37,258 INFO L87 Difference]: Start difference. First operand 90971 states and 342395 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:39,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:15:39,189 INFO L93 Difference]: Finished difference Result 124333 states and 441738 transitions. [2021-06-05 21:15:39,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-05 21:15:39,201 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 21:15:39,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:15:39,567 INFO L225 Difference]: With dead ends: 124333 [2021-06-05 21:15:39,568 INFO L226 Difference]: Without dead ends: 124126 [2021-06-05 21:15:39,568 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2160 ImplicationChecksByTransitivity, 1039.2ms TimeCoverageRelationStatistics Valid=1215, Invalid=4335, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 21:15:40,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124126 states. [2021-06-05 21:15:41,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124126 to 81617. [2021-06-05 21:15:41,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81617 states, 81616 states have (on average 3.7307023132719075) internal successors, (304485), 81616 states have internal predecessors, (304485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:42,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81617 states to 81617 states and 304485 transitions. [2021-06-05 21:15:42,037 INFO L78 Accepts]: Start accepts. Automaton has 81617 states and 304485 transitions. Word has length 29 [2021-06-05 21:15:42,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:15:42,037 INFO L482 AbstractCegarLoop]: Abstraction has 81617 states and 304485 transitions. [2021-06-05 21:15:42,037 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:42,037 INFO L276 IsEmpty]: Start isEmpty. Operand 81617 states and 304485 transitions. [2021-06-05 21:15:42,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 21:15:42,170 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:15:42,170 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:15:42,375 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:15:42,376 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:15:42,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:15:42,376 INFO L82 PathProgramCache]: Analyzing trace with hash 2042862942, now seen corresponding path program 109 times [2021-06-05 21:15:42,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:15:42,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203532187] [2021-06-05 21:15:42,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:15:42,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:15:42,405 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:15:42,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:15:42,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203532187] [2021-06-05 21:15:42,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203532187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:42,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418346070] [2021-06-05 21:15:42,406 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:15:42,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:15:42,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 21:15:42,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:15:42,462 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:15:42,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418346070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:42,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:15:42,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 8 [2021-06-05 21:15:42,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453841907] [2021-06-05 21:15:42,462 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:15:42,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:15:42,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:15:42,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:15:42,463 INFO L87 Difference]: Start difference. First operand 81617 states and 304485 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:43,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:15:43,410 INFO L93 Difference]: Finished difference Result 104858 states and 384069 transitions. [2021-06-05 21:15:43,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:15:43,411 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 21:15:43,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:15:43,727 INFO L225 Difference]: With dead ends: 104858 [2021-06-05 21:15:43,727 INFO L226 Difference]: Without dead ends: 104830 [2021-06-05 21:15:43,727 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 56.8ms TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:15:43,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104830 states. [2021-06-05 21:15:45,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104830 to 80598. [2021-06-05 21:15:45,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80598 states, 80597 states have (on average 3.718897725721801) internal successors, (299732), 80597 states have internal predecessors, (299732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:46,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80598 states to 80598 states and 299732 transitions. [2021-06-05 21:15:46,265 INFO L78 Accepts]: Start accepts. Automaton has 80598 states and 299732 transitions. Word has length 29 [2021-06-05 21:15:46,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:15:46,266 INFO L482 AbstractCegarLoop]: Abstraction has 80598 states and 299732 transitions. [2021-06-05 21:15:46,266 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:46,267 INFO L276 IsEmpty]: Start isEmpty. Operand 80598 states and 299732 transitions. [2021-06-05 21:15:46,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 21:15:46,413 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:15:46,414 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:15:46,631 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-06-05 21:15:46,631 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:15:46,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:15:46,632 INFO L82 PathProgramCache]: Analyzing trace with hash 99679966, now seen corresponding path program 110 times [2021-06-05 21:15:46,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:15:46,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805809628] [2021-06-05 21:15:46,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:15:46,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:15:46,692 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:15:46,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:15:46,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805809628] [2021-06-05 21:15:46,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805809628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:46,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475488399] [2021-06-05 21:15:46,692 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:15:46,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:15:46,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:15:46,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 21:15:46,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:15:46,786 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:15:46,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475488399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:46,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:15:46,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-06-05 21:15:46,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692297849] [2021-06-05 21:15:46,786 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:15:46,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:15:46,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:15:46,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:15:46,787 INFO L87 Difference]: Start difference. First operand 80598 states and 299732 transitions. Second operand has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:48,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:15:48,299 INFO L93 Difference]: Finished difference Result 120372 states and 431223 transitions. [2021-06-05 21:15:48,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 21:15:48,303 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 21:15:48,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:15:48,636 INFO L225 Difference]: With dead ends: 120372 [2021-06-05 21:15:48,636 INFO L226 Difference]: Without dead ends: 120022 [2021-06-05 21:15:48,637 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1056 ImplicationChecksByTransitivity, 444.0ms TimeCoverageRelationStatistics Valid=699, Invalid=2493, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 21:15:48,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120022 states. [2021-06-05 21:15:50,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120022 to 96150. [2021-06-05 21:15:50,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96150 states, 96149 states have (on average 3.740330112637677) internal successors, (359629), 96149 states have internal predecessors, (359629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:51,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96150 states to 96150 states and 359629 transitions. [2021-06-05 21:15:51,254 INFO L78 Accepts]: Start accepts. Automaton has 96150 states and 359629 transitions. Word has length 29 [2021-06-05 21:15:51,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:15:51,255 INFO L482 AbstractCegarLoop]: Abstraction has 96150 states and 359629 transitions. [2021-06-05 21:15:51,255 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:51,255 INFO L276 IsEmpty]: Start isEmpty. Operand 96150 states and 359629 transitions. [2021-06-05 21:15:51,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 21:15:51,396 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:15:51,396 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:15:51,606 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-06-05 21:15:51,606 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:15:51,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:15:51,607 INFO L82 PathProgramCache]: Analyzing trace with hash 1163429594, now seen corresponding path program 111 times [2021-06-05 21:15:51,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:15:51,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080604410] [2021-06-05 21:15:51,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:15:51,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:15:51,633 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:15:51,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:15:51,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080604410] [2021-06-05 21:15:51,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080604410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:51,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654377381] [2021-06-05 21:15:51,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:15:51,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:15:51,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:15:51,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 21:15:51,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:15:51,713 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 21:15:51,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654377381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:51,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:15:51,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-06-05 21:15:51,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745130506] [2021-06-05 21:15:51,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:15:51,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:15:51,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:15:51,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:15:51,714 INFO L87 Difference]: Start difference. First operand 96150 states and 359629 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 21:15:53,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:15:53,496 INFO L93 Difference]: Finished difference Result 158751 states and 577161 transitions. [2021-06-05 21:15:53,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 21:15:53,496 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 29 [2021-06-05 21:15:53,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:15:53,949 INFO L225 Difference]: With dead ends: 158751 [2021-06-05 21:15:53,949 INFO L226 Difference]: Without dead ends: 157945 [2021-06-05 21:15:53,949 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1069 ImplicationChecksByTransitivity, 445.5ms TimeCoverageRelationStatistics Valid=781, Invalid=2641, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 21:15:54,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157945 states. [2021-06-05 21:15:56,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157945 to 113836. [2021-06-05 21:15:56,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113836 states, 113835 states have (on average 3.7557693152369658) internal successors, (427538), 113835 states have internal predecessors, (427538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:57,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113836 states to 113836 states and 427538 transitions. [2021-06-05 21:15:57,010 INFO L78 Accepts]: Start accepts. Automaton has 113836 states and 427538 transitions. Word has length 29 [2021-06-05 21:15:57,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:15:57,010 INFO L482 AbstractCegarLoop]: Abstraction has 113836 states and 427538 transitions. [2021-06-05 21:15:57,010 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 21:15:57,010 INFO L276 IsEmpty]: Start isEmpty. Operand 113836 states and 427538 transitions. [2021-06-05 21:15:57,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 21:15:57,186 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:15:57,186 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:15:57,386 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:15:57,386 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:15:57,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:15:57,387 INFO L82 PathProgramCache]: Analyzing trace with hash 1318670174, now seen corresponding path program 112 times [2021-06-05 21:15:57,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:15:57,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142838428] [2021-06-05 21:15:57,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:15:57,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:15:57,412 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:15:57,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:15:57,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142838428] [2021-06-05 21:15:57,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142838428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:57,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998035892] [2021-06-05 21:15:57,412 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:15:57,435 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:15:57,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:15:57,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 21:15:57,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:15:57,466 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:15:57,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998035892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:57,466 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:15:57,466 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 21:15:57,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860747108] [2021-06-05 21:15:57,466 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:15:57,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:15:57,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:15:57,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:15:57,466 INFO L87 Difference]: Start difference. First operand 113836 states and 427538 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:58,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:15:58,600 INFO L93 Difference]: Finished difference Result 124805 states and 462681 transitions. [2021-06-05 21:15:58,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:15:58,600 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 21:15:58,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:15:58,970 INFO L225 Difference]: With dead ends: 124805 [2021-06-05 21:15:58,970 INFO L226 Difference]: Without dead ends: 124469 [2021-06-05 21:15:58,970 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 38.5ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:15:59,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124469 states. [2021-06-05 21:16:01,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124469 to 117136. [2021-06-05 21:16:01,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117136 states, 117135 states have (on average 3.760541255815939) internal successors, (440491), 117135 states have internal predecessors, (440491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:01,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117136 states to 117136 states and 440491 transitions. [2021-06-05 21:16:01,866 INFO L78 Accepts]: Start accepts. Automaton has 117136 states and 440491 transitions. Word has length 29 [2021-06-05 21:16:01,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:16:01,866 INFO L482 AbstractCegarLoop]: Abstraction has 117136 states and 440491 transitions. [2021-06-05 21:16:01,866 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:01,866 INFO L276 IsEmpty]: Start isEmpty. Operand 117136 states and 440491 transitions. [2021-06-05 21:16:02,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 21:16:02,041 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:16:02,041 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:16:02,242 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:16:02,242 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:16:02,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:16:02,242 INFO L82 PathProgramCache]: Analyzing trace with hash -190689630, now seen corresponding path program 113 times [2021-06-05 21:16:02,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:16:02,242 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107012014] [2021-06-05 21:16:02,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:16:02,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:16:02,264 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:16:02,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:16:02,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107012014] [2021-06-05 21:16:02,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107012014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:16:02,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858621572] [2021-06-05 21:16:02,264 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:16:02,287 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:16:02,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:16:02,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 21:16:02,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:16:02,700 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:16:02,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858621572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:16:02,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:16:02,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 21:16:02,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256487364] [2021-06-05 21:16:02,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:16:02,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:16:02,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:16:02,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:16:02,701 INFO L87 Difference]: Start difference. First operand 117136 states and 440491 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:03,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:16:03,421 INFO L93 Difference]: Finished difference Result 131593 states and 486537 transitions. [2021-06-05 21:16:03,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:16:03,421 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 21:16:03,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:16:03,789 INFO L225 Difference]: With dead ends: 131593 [2021-06-05 21:16:03,789 INFO L226 Difference]: Without dead ends: 131578 [2021-06-05 21:16:03,789 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 32.5ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:16:03,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131578 states. [2021-06-05 21:16:06,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131578 to 118035. [2021-06-05 21:16:06,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118035 states, 118034 states have (on average 3.757493603537964) internal successors, (443512), 118034 states have internal predecessors, (443512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:06,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118035 states to 118035 states and 443512 transitions. [2021-06-05 21:16:06,687 INFO L78 Accepts]: Start accepts. Automaton has 118035 states and 443512 transitions. Word has length 29 [2021-06-05 21:16:06,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:16:06,688 INFO L482 AbstractCegarLoop]: Abstraction has 118035 states and 443512 transitions. [2021-06-05 21:16:06,688 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:06,688 INFO L276 IsEmpty]: Start isEmpty. Operand 118035 states and 443512 transitions. [2021-06-05 21:16:07,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 21:16:07,334 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:16:07,335 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:16:07,547 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:16:07,547 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:16:07,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:16:07,548 INFO L82 PathProgramCache]: Analyzing trace with hash 68105694, now seen corresponding path program 114 times [2021-06-05 21:16:07,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:16:07,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090140159] [2021-06-05 21:16:07,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:16:07,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:16:07,579 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:16:07,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:16:07,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090140159] [2021-06-05 21:16:07,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090140159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:16:07,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343518457] [2021-06-05 21:16:07,580 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:16:07,604 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:16:07,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:16:07,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 21:16:07,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:16:07,662 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:16:07,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343518457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:16:07,662 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:16:07,662 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-06-05 21:16:07,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525448360] [2021-06-05 21:16:07,662 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:16:07,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:16:07,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:16:07,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:16:07,662 INFO L87 Difference]: Start difference. First operand 118035 states and 443512 transitions. Second operand has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:09,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:16:09,751 INFO L93 Difference]: Finished difference Result 162417 states and 578150 transitions. [2021-06-05 21:16:09,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-06-05 21:16:09,765 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 21:16:09,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:16:10,196 INFO L225 Difference]: With dead ends: 162417 [2021-06-05 21:16:10,197 INFO L226 Difference]: Without dead ends: 162210 [2021-06-05 21:16:10,197 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2252 ImplicationChecksByTransitivity, 636.8ms TimeCoverageRelationStatistics Valid=1397, Invalid=4609, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 21:16:10,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162210 states. [2021-06-05 21:16:12,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162210 to 119675. [2021-06-05 21:16:12,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119675 states, 119674 states have (on average 3.739550779617962) internal successors, (447527), 119674 states have internal predecessors, (447527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:13,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119675 states to 119675 states and 447527 transitions. [2021-06-05 21:16:13,112 INFO L78 Accepts]: Start accepts. Automaton has 119675 states and 447527 transitions. Word has length 29 [2021-06-05 21:16:13,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:16:13,112 INFO L482 AbstractCegarLoop]: Abstraction has 119675 states and 447527 transitions. [2021-06-05 21:16:13,112 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:13,113 INFO L276 IsEmpty]: Start isEmpty. Operand 119675 states and 447527 transitions. [2021-06-05 21:16:13,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 21:16:13,279 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:16:13,279 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:16:13,479 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:16:13,479 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:16:13,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:16:13,480 INFO L82 PathProgramCache]: Analyzing trace with hash 218777654, now seen corresponding path program 115 times [2021-06-05 21:16:13,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:16:13,480 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617481473] [2021-06-05 21:16:13,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:16:13,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:16:13,498 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:16:13,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:16:13,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617481473] [2021-06-05 21:16:13,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617481473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:16:13,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556626094] [2021-06-05 21:16:13,498 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:16:13,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:16:13,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 21:16:13,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:16:13,549 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:16:13,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556626094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:16:13,549 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:16:13,549 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 21:16:13,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832851309] [2021-06-05 21:16:13,549 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:16:13,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:16:13,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:16:13,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:16:13,549 INFO L87 Difference]: Start difference. First operand 119675 states and 447527 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:14,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:16:14,587 INFO L93 Difference]: Finished difference Result 135149 states and 501662 transitions. [2021-06-05 21:16:14,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:16:14,587 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 21:16:14,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:16:14,979 INFO L225 Difference]: With dead ends: 135149 [2021-06-05 21:16:14,979 INFO L226 Difference]: Without dead ends: 135117 [2021-06-05 21:16:14,979 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 25.0ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:16:15,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135117 states. [2021-06-05 21:16:17,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135117 to 129535. [2021-06-05 21:16:17,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129535 states, 129534 states have (on average 3.746946747572066) internal successors, (485357), 129534 states have internal predecessors, (485357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:17,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129535 states to 129535 states and 485357 transitions. [2021-06-05 21:16:17,929 INFO L78 Accepts]: Start accepts. Automaton has 129535 states and 485357 transitions. Word has length 29 [2021-06-05 21:16:17,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:16:17,930 INFO L482 AbstractCegarLoop]: Abstraction has 129535 states and 485357 transitions. [2021-06-05 21:16:17,930 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:17,930 INFO L276 IsEmpty]: Start isEmpty. Operand 129535 states and 485357 transitions. [2021-06-05 21:16:18,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 21:16:18,132 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:16:18,132 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:16:18,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-06-05 21:16:18,822 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:16:18,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:16:18,822 INFO L82 PathProgramCache]: Analyzing trace with hash 512401842, now seen corresponding path program 116 times [2021-06-05 21:16:18,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:16:18,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669564119] [2021-06-05 21:16:18,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:16:18,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:16:18,841 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:16:18,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:16:18,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669564119] [2021-06-05 21:16:18,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669564119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:16:18,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659801839] [2021-06-05 21:16:18,842 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:16:18,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:16:18,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:16:18,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 21:16:18,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:16:18,900 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:16:18,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659801839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:16:18,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:16:18,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 21:16:18,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467072774] [2021-06-05 21:16:18,900 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:16:18,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:16:18,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:16:18,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:16:18,901 INFO L87 Difference]: Start difference. First operand 129535 states and 485357 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:19,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:16:19,606 INFO L93 Difference]: Finished difference Result 143528 states and 531160 transitions. [2021-06-05 21:16:19,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:16:19,606 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 21:16:19,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:16:20,024 INFO L225 Difference]: With dead ends: 143528 [2021-06-05 21:16:20,024 INFO L226 Difference]: Without dead ends: 143516 [2021-06-05 21:16:20,024 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 34.5ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:16:20,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143516 states. [2021-06-05 21:16:22,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143516 to 130136. [2021-06-05 21:16:22,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130136 states, 130135 states have (on average 3.7450416874783876) internal successors, (487361), 130135 states have internal predecessors, (487361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:23,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130136 states to 130136 states and 487361 transitions. [2021-06-05 21:16:23,686 INFO L78 Accepts]: Start accepts. Automaton has 130136 states and 487361 transitions. Word has length 29 [2021-06-05 21:16:23,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:16:23,686 INFO L482 AbstractCegarLoop]: Abstraction has 130136 states and 487361 transitions. [2021-06-05 21:16:23,686 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:23,686 INFO L276 IsEmpty]: Start isEmpty. Operand 130136 states and 487361 transitions. [2021-06-05 21:16:23,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 21:16:23,908 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:16:23,908 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:16:24,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-06-05 21:16:24,108 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:16:24,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:16:24,109 INFO L82 PathProgramCache]: Analyzing trace with hash 677507946, now seen corresponding path program 117 times [2021-06-05 21:16:24,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:16:24,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328300299] [2021-06-05 21:16:24,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:16:24,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:16:24,132 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:16:24,132 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:16:24,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328300299] [2021-06-05 21:16:24,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328300299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:16:24,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875735714] [2021-06-05 21:16:24,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:16:24,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:16:24,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:16:24,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 21:16:24,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:16:24,199 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:16:24,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875735714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:16:24,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:16:24,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-06-05 21:16:24,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117997061] [2021-06-05 21:16:24,199 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:16:24,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:16:24,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:16:24,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:16:24,200 INFO L87 Difference]: Start difference. First operand 130136 states and 487361 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:25,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:16:25,871 INFO L93 Difference]: Finished difference Result 158841 states and 570866 transitions. [2021-06-05 21:16:25,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 21:16:25,871 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 21:16:25,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:16:26,301 INFO L225 Difference]: With dead ends: 158841 [2021-06-05 21:16:26,301 INFO L226 Difference]: Without dead ends: 158080 [2021-06-05 21:16:26,302 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 246.0ms TimeCoverageRelationStatistics Valid=450, Invalid=1272, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 21:16:26,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158080 states. [2021-06-05 21:16:28,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158080 to 127564. [2021-06-05 21:16:28,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127564 states, 127563 states have (on average 3.7467839420521623) internal successors, (477951), 127563 states have internal predecessors, (477951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:29,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127564 states to 127564 states and 477951 transitions. [2021-06-05 21:16:29,356 INFO L78 Accepts]: Start accepts. Automaton has 127564 states and 477951 transitions. Word has length 29 [2021-06-05 21:16:29,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:16:29,356 INFO L482 AbstractCegarLoop]: Abstraction has 127564 states and 477951 transitions. [2021-06-05 21:16:29,357 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:29,357 INFO L276 IsEmpty]: Start isEmpty. Operand 127564 states and 477951 transitions. [2021-06-05 21:16:29,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 21:16:29,559 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:16:29,559 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:16:29,759 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-06-05 21:16:29,760 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:16:29,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:16:29,760 INFO L82 PathProgramCache]: Analyzing trace with hash -2080726810, now seen corresponding path program 118 times [2021-06-05 21:16:29,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:16:29,760 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71884184] [2021-06-05 21:16:29,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:16:29,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:16:29,779 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:16:29,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:16:29,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71884184] [2021-06-05 21:16:29,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71884184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:16:29,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817973298] [2021-06-05 21:16:29,779 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:16:29,801 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:16:29,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:16:29,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 21:16:29,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:16:29,836 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:16:29,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817973298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:16:29,836 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:16:29,836 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-06-05 21:16:29,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362553150] [2021-06-05 21:16:29,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:16:29,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:16:29,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:16:29,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:16:29,836 INFO L87 Difference]: Start difference. First operand 127564 states and 477951 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:31,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:16:31,098 INFO L93 Difference]: Finished difference Result 144032 states and 532857 transitions. [2021-06-05 21:16:31,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:16:31,099 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 21:16:31,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:16:31,497 INFO L225 Difference]: With dead ends: 144032 [2021-06-05 21:16:31,497 INFO L226 Difference]: Without dead ends: 144002 [2021-06-05 21:16:31,497 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 45.7ms TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:16:31,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144002 states. [2021-06-05 21:16:33,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144002 to 129426. [2021-06-05 21:16:34,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129426 states, 129425 states have (on average 3.7404597257098704) internal successors, (484109), 129425 states have internal predecessors, (484109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:35,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129426 states to 129426 states and 484109 transitions. [2021-06-05 21:16:35,009 INFO L78 Accepts]: Start accepts. Automaton has 129426 states and 484109 transitions. Word has length 29 [2021-06-05 21:16:35,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:16:35,009 INFO L482 AbstractCegarLoop]: Abstraction has 129426 states and 484109 transitions. [2021-06-05 21:16:35,009 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:35,025 INFO L276 IsEmpty]: Start isEmpty. Operand 129426 states and 484109 transitions. [2021-06-05 21:16:35,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 21:16:35,226 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:16:35,226 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:16:35,430 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:16:35,430 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:16:35,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:16:35,431 INFO L82 PathProgramCache]: Analyzing trace with hash 1305487906, now seen corresponding path program 119 times [2021-06-05 21:16:35,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:16:35,432 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221215390] [2021-06-05 21:16:35,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:16:35,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:16:35,469 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:16:35,469 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:16:35,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221215390] [2021-06-05 21:16:35,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221215390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:16:35,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471954139] [2021-06-05 21:16:35,470 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:16:35,492 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:16:35,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:16:35,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 21:16:35,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:16:35,525 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:16:35,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471954139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:16:35,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:16:35,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 21:16:35,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451097026] [2021-06-05 21:16:35,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:16:35,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:16:35,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:16:35,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:16:35,526 INFO L87 Difference]: Start difference. First operand 129426 states and 484109 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:36,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:16:36,246 INFO L93 Difference]: Finished difference Result 143204 states and 525770 transitions. [2021-06-05 21:16:36,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:16:36,247 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 21:16:36,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:16:36,667 INFO L225 Difference]: With dead ends: 143204 [2021-06-05 21:16:36,667 INFO L226 Difference]: Without dead ends: 143141 [2021-06-05 21:16:36,668 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 60.4ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:16:37,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143141 states. [2021-06-05 21:16:39,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143141 to 126464. [2021-06-05 21:16:39,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126464 states, 126463 states have (on average 3.727643658619517) internal successors, (471409), 126463 states have internal predecessors, (471409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:39,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126464 states to 126464 states and 471409 transitions. [2021-06-05 21:16:39,904 INFO L78 Accepts]: Start accepts. Automaton has 126464 states and 471409 transitions. Word has length 29 [2021-06-05 21:16:39,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:16:39,904 INFO L482 AbstractCegarLoop]: Abstraction has 126464 states and 471409 transitions. [2021-06-05 21:16:39,904 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:39,904 INFO L276 IsEmpty]: Start isEmpty. Operand 126464 states and 471409 transitions. [2021-06-05 21:16:40,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 21:16:40,578 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:16:40,578 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:16:40,793 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2021-06-05 21:16:40,793 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:16:40,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:16:40,793 INFO L82 PathProgramCache]: Analyzing trace with hash 2110231202, now seen corresponding path program 120 times [2021-06-05 21:16:40,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:16:40,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999632351] [2021-06-05 21:16:40,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:16:40,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:16:40,819 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:16:40,819 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:16:40,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999632351] [2021-06-05 21:16:40,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999632351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:16:40,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112903886] [2021-06-05 21:16:40,820 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:16:40,842 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:16:40,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:16:40,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 21:16:40,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:16:40,909 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:16:40,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112903886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:16:40,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:16:40,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 21:16:40,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495457010] [2021-06-05 21:16:40,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:16:40,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:16:40,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:16:40,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:16:40,910 INFO L87 Difference]: Start difference. First operand 126464 states and 471409 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:42,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:16:42,931 INFO L93 Difference]: Finished difference Result 186865 states and 670831 transitions. [2021-06-05 21:16:42,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 21:16:42,931 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 21:16:42,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:16:43,419 INFO L225 Difference]: With dead ends: 186865 [2021-06-05 21:16:43,419 INFO L226 Difference]: Without dead ends: 186574 [2021-06-05 21:16:43,420 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1235 ImplicationChecksByTransitivity, 478.1ms TimeCoverageRelationStatistics Valid=946, Invalid=3086, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 21:16:43,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186574 states. [2021-06-05 21:16:46,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186574 to 129576. [2021-06-05 21:16:46,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129576 states, 129575 states have (on average 3.7100983986108433) internal successors, (480736), 129575 states have internal predecessors, (480736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:46,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129576 states to 129576 states and 480736 transitions. [2021-06-05 21:16:46,591 INFO L78 Accepts]: Start accepts. Automaton has 129576 states and 480736 transitions. Word has length 29 [2021-06-05 21:16:46,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:16:46,591 INFO L482 AbstractCegarLoop]: Abstraction has 129576 states and 480736 transitions. [2021-06-05 21:16:46,591 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:46,591 INFO L276 IsEmpty]: Start isEmpty. Operand 129576 states and 480736 transitions. [2021-06-05 21:16:46,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 21:16:46,789 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:16:46,789 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:16:46,989 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:16:46,989 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:16:46,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:16:46,989 INFO L82 PathProgramCache]: Analyzing trace with hash 733832030, now seen corresponding path program 121 times [2021-06-05 21:16:46,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:16:46,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509348536] [2021-06-05 21:16:46,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:16:46,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:16:47,015 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:16:47,015 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:16:47,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509348536] [2021-06-05 21:16:47,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509348536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:16:47,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155154787] [2021-06-05 21:16:47,015 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 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:16:47,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:16:47,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 21:16:47,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:16:47,069 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:16:47,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155154787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:16:47,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:16:47,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 21:16:47,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788664585] [2021-06-05 21:16:47,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:16:47,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:16:47,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:16:47,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:16:47,070 INFO L87 Difference]: Start difference. First operand 129576 states and 480736 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:48,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:16:48,326 INFO L93 Difference]: Finished difference Result 140798 states and 513511 transitions. [2021-06-05 21:16:48,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:16:48,327 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 21:16:48,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:16:48,730 INFO L225 Difference]: With dead ends: 140798 [2021-06-05 21:16:48,730 INFO L226 Difference]: Without dead ends: 140342 [2021-06-05 21:16:48,730 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 523.4ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:16:48,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140342 states. [2021-06-05 21:16:51,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140342 to 130720. [2021-06-05 21:16:51,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130720 states, 130719 states have (on average 3.7030959539164163) internal successors, (484065), 130719 states have internal predecessors, (484065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:52,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130720 states to 130720 states and 484065 transitions. [2021-06-05 21:16:52,356 INFO L78 Accepts]: Start accepts. Automaton has 130720 states and 484065 transitions. Word has length 29 [2021-06-05 21:16:52,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:16:52,356 INFO L482 AbstractCegarLoop]: Abstraction has 130720 states and 484065 transitions. [2021-06-05 21:16:52,356 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:52,356 INFO L276 IsEmpty]: Start isEmpty. Operand 130720 states and 484065 transitions. [2021-06-05 21:16:52,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 21:16:52,601 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:16:52,601 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:16:52,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-06-05 21:16:52,801 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:16:52,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:16:52,801 INFO L82 PathProgramCache]: Analyzing trace with hash 565779372, now seen corresponding path program 122 times [2021-06-05 21:16:52,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:16:52,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877279724] [2021-06-05 21:16:52,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:16:52,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:16:52,901 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:16:52,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:16:52,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877279724] [2021-06-05 21:16:52,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877279724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:16:52,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315647450] [2021-06-05 21:16:52,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:16:52,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:16:52,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:16:52,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:16:52,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:16:53,167 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:16:53,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315647450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:16:53,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:16:53,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 21:16:53,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230059296] [2021-06-05 21:16:53,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:16:53,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:16:53,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:16:53,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=415, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:16:53,167 INFO L87 Difference]: Start difference. First operand 130720 states and 484065 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:54,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:16:54,638 INFO L93 Difference]: Finished difference Result 130957 states and 484770 transitions. [2021-06-05 21:16:54,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:16:54,639 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 21:16:54,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:16:55,010 INFO L225 Difference]: With dead ends: 130957 [2021-06-05 21:16:55,010 INFO L226 Difference]: Without dead ends: 130942 [2021-06-05 21:16:55,011 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 378.6ms TimeCoverageRelationStatistics Valid=77, Invalid=735, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:16:55,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130942 states. [2021-06-05 21:16:56,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130942 to 130808. [2021-06-05 21:16:57,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130808 states, 130807 states have (on average 3.702852293837486) internal successors, (484359), 130807 states have internal predecessors, (484359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:57,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130808 states to 130808 states and 484359 transitions. [2021-06-05 21:16:57,863 INFO L78 Accepts]: Start accepts. Automaton has 130808 states and 484359 transitions. Word has length 33 [2021-06-05 21:16:57,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:16:57,863 INFO L482 AbstractCegarLoop]: Abstraction has 130808 states and 484359 transitions. [2021-06-05 21:16:57,863 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:57,863 INFO L276 IsEmpty]: Start isEmpty. Operand 130808 states and 484359 transitions. [2021-06-05 21:16:58,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 21:16:58,106 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:16:58,106 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:16:58,306 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:16:58,306 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:16:58,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:16:58,307 INFO L82 PathProgramCache]: Analyzing trace with hash -1661708648, now seen corresponding path program 123 times [2021-06-05 21:16:58,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:16:58,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128830620] [2021-06-05 21:16:58,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:16:58,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:16:58,401 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:16:58,401 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:16:58,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128830620] [2021-06-05 21:16:58,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128830620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:16:58,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111322718] [2021-06-05 21:16:58,402 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:16:58,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:16:58,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:16:58,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:16:58,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:16:58,680 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:16:58,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111322718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:16:58,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:16:58,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 21:16:58,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914498300] [2021-06-05 21:16:58,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:16:58,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:16:58,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:16:58,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=414, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:16:58,681 INFO L87 Difference]: Start difference. First operand 130808 states and 484359 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:00,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:00,129 INFO L93 Difference]: Finished difference Result 131223 states and 485558 transitions. [2021-06-05 21:17:00,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:17:00,129 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 21:17:00,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:00,523 INFO L225 Difference]: With dead ends: 131223 [2021-06-05 21:17:00,524 INFO L226 Difference]: Without dead ends: 131110 [2021-06-05 21:17:00,524 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 371.5ms TimeCoverageRelationStatistics Valid=74, Invalid=682, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:17:00,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131110 states. [2021-06-05 21:17:02,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131110 to 130915. [2021-06-05 21:17:02,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130915 states, 130914 states have (on average 3.7024840735139097) internal successors, (484707), 130914 states have internal predecessors, (484707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:03,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130915 states to 130915 states and 484707 transitions. [2021-06-05 21:17:03,247 INFO L78 Accepts]: Start accepts. Automaton has 130915 states and 484707 transitions. Word has length 33 [2021-06-05 21:17:03,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:03,247 INFO L482 AbstractCegarLoop]: Abstraction has 130915 states and 484707 transitions. [2021-06-05 21:17:03,247 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:03,247 INFO L276 IsEmpty]: Start isEmpty. Operand 130915 states and 484707 transitions. [2021-06-05 21:17:03,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 21:17:03,499 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:03,499 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:03,715 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable131 [2021-06-05 21:17:03,716 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:03,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:03,716 INFO L82 PathProgramCache]: Analyzing trace with hash 262334044, now seen corresponding path program 124 times [2021-06-05 21:17:03,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:03,716 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112797240] [2021-06-05 21:17:03,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:03,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:03,812 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:03,812 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:03,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112797240] [2021-06-05 21:17:03,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112797240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:03,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965810543] [2021-06-05 21:17:03,813 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:03,839 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:17:03,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:03,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:17:03,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:04,568 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:04,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965810543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:04,568 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:04,568 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 21:17:04,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419011329] [2021-06-05 21:17:04,569 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:17:04,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:04,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:17:04,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:17:04,569 INFO L87 Difference]: Start difference. First operand 130915 states and 484707 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:05,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:05,591 INFO L93 Difference]: Finished difference Result 131397 states and 486090 transitions. [2021-06-05 21:17:05,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:17:05,591 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 21:17:05,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:05,989 INFO L225 Difference]: With dead ends: 131397 [2021-06-05 21:17:05,990 INFO L226 Difference]: Without dead ends: 131308 [2021-06-05 21:17:05,990 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 365.2ms TimeCoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:17:06,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131308 states. [2021-06-05 21:17:08,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131308 to 131025. [2021-06-05 21:17:08,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131025 states, 131024 states have (on average 3.7022224935889607) internal successors, (485080), 131024 states have internal predecessors, (485080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:08,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131025 states to 131025 states and 485080 transitions. [2021-06-05 21:17:08,836 INFO L78 Accepts]: Start accepts. Automaton has 131025 states and 485080 transitions. Word has length 33 [2021-06-05 21:17:08,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:08,836 INFO L482 AbstractCegarLoop]: Abstraction has 131025 states and 485080 transitions. [2021-06-05 21:17:08,836 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:08,836 INFO L276 IsEmpty]: Start isEmpty. Operand 131025 states and 485080 transitions. [2021-06-05 21:17:09,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 21:17:09,638 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:09,638 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:09,845 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:09,845 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:09,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:09,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1720019168, now seen corresponding path program 125 times [2021-06-05 21:17:09,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:09,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048488419] [2021-06-05 21:17:09,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:09,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:09,936 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:09,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:09,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048488419] [2021-06-05 21:17:09,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048488419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:09,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640082459] [2021-06-05 21:17:09,936 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:09,961 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 21:17:09,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:09,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:17:09,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:10,166 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:10,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640082459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:10,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:10,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 21:17:10,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984417177] [2021-06-05 21:17:10,166 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:17:10,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:10,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:17:10,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:17:10,167 INFO L87 Difference]: Start difference. First operand 131025 states and 485080 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:11,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:11,107 INFO L93 Difference]: Finished difference Result 131417 states and 486203 transitions. [2021-06-05 21:17:11,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:17:11,108 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 21:17:11,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:11,973 INFO L225 Difference]: With dead ends: 131417 [2021-06-05 21:17:11,973 INFO L226 Difference]: Without dead ends: 131387 [2021-06-05 21:17:11,973 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 337.9ms TimeCoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:17:12,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131387 states. [2021-06-05 21:17:13,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131387 to 131100. [2021-06-05 21:17:13,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131100 states, 131099 states have (on average 3.70232419774369) internal successors, (485371), 131099 states have internal predecessors, (485371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:14,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131100 states to 131100 states and 485371 transitions. [2021-06-05 21:17:14,694 INFO L78 Accepts]: Start accepts. Automaton has 131100 states and 485371 transitions. Word has length 33 [2021-06-05 21:17:14,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:14,694 INFO L482 AbstractCegarLoop]: Abstraction has 131100 states and 485371 transitions. [2021-06-05 21:17:14,694 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:14,694 INFO L276 IsEmpty]: Start isEmpty. Operand 131100 states and 485371 transitions. [2021-06-05 21:17:14,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 21:17:14,944 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:14,944 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:15,145 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-06-05 21:17:15,145 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:15,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:15,145 INFO L82 PathProgramCache]: Analyzing trace with hash -168976428, now seen corresponding path program 126 times [2021-06-05 21:17:15,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:15,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176901689] [2021-06-05 21:17:15,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:15,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:15,237 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:15,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:15,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176901689] [2021-06-05 21:17:15,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176901689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:15,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41147896] [2021-06-05 21:17:15,238 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:15,262 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:17:15,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:15,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:17:15,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:15,493 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:15,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41147896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:15,494 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:15,494 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 21:17:15,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738875531] [2021-06-05 21:17:15,494 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:17:15,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:15,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:17:15,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:17:15,494 INFO L87 Difference]: Start difference. First operand 131100 states and 485371 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:16,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:16,951 INFO L93 Difference]: Finished difference Result 131430 states and 486305 transitions. [2021-06-05 21:17:16,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:17:16,952 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 21:17:16,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:17,321 INFO L225 Difference]: With dead ends: 131430 [2021-06-05 21:17:17,321 INFO L226 Difference]: Without dead ends: 131346 [2021-06-05 21:17:17,321 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 324.9ms TimeCoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:17:17,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131346 states. [2021-06-05 21:17:19,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131346 to 131132. [2021-06-05 21:17:19,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131132 states, 131131 states have (on average 3.7021528090230382) internal successors, (485467), 131131 states have internal predecessors, (485467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:20,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131132 states to 131132 states and 485467 transitions. [2021-06-05 21:17:20,146 INFO L78 Accepts]: Start accepts. Automaton has 131132 states and 485467 transitions. Word has length 33 [2021-06-05 21:17:20,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:20,146 INFO L482 AbstractCegarLoop]: Abstraction has 131132 states and 485467 transitions. [2021-06-05 21:17:20,146 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:20,146 INFO L276 IsEmpty]: Start isEmpty. Operand 131132 states and 485467 transitions. [2021-06-05 21:17:20,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 21:17:20,390 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:20,390 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:20,591 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-06-05 21:17:20,591 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:20,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:20,591 INFO L82 PathProgramCache]: Analyzing trace with hash 1755066264, now seen corresponding path program 127 times [2021-06-05 21:17:20,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:20,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581241177] [2021-06-05 21:17:20,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:20,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:20,681 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:20,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:20,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581241177] [2021-06-05 21:17:20,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581241177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:20,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167514817] [2021-06-05 21:17:20,681 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:20,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:20,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:17:20,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:20,962 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:20,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167514817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:20,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:20,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 21:17:20,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961957839] [2021-06-05 21:17:20,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:17:20,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:20,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:17:20,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:17:20,963 INFO L87 Difference]: Start difference. First operand 131132 states and 485467 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:22,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:22,317 INFO L93 Difference]: Finished difference Result 131646 states and 486891 transitions. [2021-06-05 21:17:22,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:17:22,317 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 21:17:22,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:22,685 INFO L225 Difference]: With dead ends: 131646 [2021-06-05 21:17:22,685 INFO L226 Difference]: Without dead ends: 131557 [2021-06-05 21:17:22,685 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 317.4ms TimeCoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:17:22,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131557 states. [2021-06-05 21:17:24,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131557 to 131193. [2021-06-05 21:17:25,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131193 states, 131192 states have (on average 3.7020778706018658) internal successors, (485683), 131192 states have internal predecessors, (485683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:25,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131193 states to 131193 states and 485683 transitions. [2021-06-05 21:17:25,419 INFO L78 Accepts]: Start accepts. Automaton has 131193 states and 485683 transitions. Word has length 33 [2021-06-05 21:17:25,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:25,419 INFO L482 AbstractCegarLoop]: Abstraction has 131193 states and 485683 transitions. [2021-06-05 21:17:25,420 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:25,420 INFO L276 IsEmpty]: Start isEmpty. Operand 131193 states and 485683 transitions. [2021-06-05 21:17:26,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 21:17:26,138 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:26,138 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:26,338 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-06-05 21:17:26,339 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:26,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:26,339 INFO L82 PathProgramCache]: Analyzing trace with hash -227286948, now seen corresponding path program 128 times [2021-06-05 21:17:26,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:26,339 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881450233] [2021-06-05 21:17:26,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:26,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:26,429 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:26,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:26,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881450233] [2021-06-05 21:17:26,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881450233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:26,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404189191] [2021-06-05 21:17:26,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:26,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:17:26,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:26,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:17:26,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:26,672 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:26,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404189191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:26,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:26,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 21:17:26,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137926428] [2021-06-05 21:17:26,672 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:17:26,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:26,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:17:26,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:17:26,672 INFO L87 Difference]: Start difference. First operand 131193 states and 485683 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:28,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:28,204 INFO L93 Difference]: Finished difference Result 131828 states and 487461 transitions. [2021-06-05 21:17:28,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:17:28,204 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 21:17:28,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:28,645 INFO L225 Difference]: With dead ends: 131828 [2021-06-05 21:17:28,646 INFO L226 Difference]: Without dead ends: 131717 [2021-06-05 21:17:28,646 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 301.2ms TimeCoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:17:28,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131717 states. [2021-06-05 21:17:30,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131717 to 131381. [2021-06-05 21:17:30,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131381 states, 131380 states have (on average 3.7014537981427917) internal successors, (486297), 131380 states have internal predecessors, (486297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:31,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131381 states to 131381 states and 486297 transitions. [2021-06-05 21:17:31,365 INFO L78 Accepts]: Start accepts. Automaton has 131381 states and 486297 transitions. Word has length 33 [2021-06-05 21:17:31,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:31,365 INFO L482 AbstractCegarLoop]: Abstraction has 131381 states and 486297 transitions. [2021-06-05 21:17:31,365 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:31,365 INFO L276 IsEmpty]: Start isEmpty. Operand 131381 states and 486297 transitions. [2021-06-05 21:17:31,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 21:17:31,606 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:31,606 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:31,806 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:31,807 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:31,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:31,807 INFO L82 PathProgramCache]: Analyzing trace with hash -410972520, now seen corresponding path program 129 times [2021-06-05 21:17:31,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:31,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719571059] [2021-06-05 21:17:31,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:31,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:31,898 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:31,899 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:31,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719571059] [2021-06-05 21:17:31,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719571059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:31,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275179561] [2021-06-05 21:17:31,899 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 21:17:31,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 21:17:31,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:31,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:17:31,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:32,199 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:32,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275179561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:32,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:32,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 21:17:32,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987321768] [2021-06-05 21:17:32,200 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:17:32,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:32,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:17:32,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:17:32,200 INFO L87 Difference]: Start difference. First operand 131381 states and 486297 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:33,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:33,603 INFO L93 Difference]: Finished difference Result 131995 states and 488033 transitions. [2021-06-05 21:17:33,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:17:33,604 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 21:17:33,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:33,993 INFO L225 Difference]: With dead ends: 131995 [2021-06-05 21:17:33,993 INFO L226 Difference]: Without dead ends: 131906 [2021-06-05 21:17:33,994 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 321.8ms TimeCoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:17:34,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131906 states. [2021-06-05 21:17:36,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131906 to 131576. [2021-06-05 21:17:36,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131576 states, 131575 states have (on average 3.7008626258787762) internal successors, (486941), 131575 states have internal predecessors, (486941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:36,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131576 states to 131576 states and 486941 transitions. [2021-06-05 21:17:36,749 INFO L78 Accepts]: Start accepts. Automaton has 131576 states and 486941 transitions. Word has length 33 [2021-06-05 21:17:36,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:36,749 INFO L482 AbstractCegarLoop]: Abstraction has 131576 states and 486941 transitions. [2021-06-05 21:17:36,749 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:36,749 INFO L276 IsEmpty]: Start isEmpty. Operand 131576 states and 486941 transitions. [2021-06-05 21:17:37,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 21:17:37,524 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:37,524 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:37,751 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:37,752 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:37,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:37,752 INFO L82 PathProgramCache]: Analyzing trace with hash 1901641564, now seen corresponding path program 130 times [2021-06-05 21:17:37,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:37,752 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783326135] [2021-06-05 21:17:37,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:37,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:37,850 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:37,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:37,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783326135] [2021-06-05 21:17:37,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783326135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:37,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573255306] [2021-06-05 21:17:37,851 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:37,874 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:17:37,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:37,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:17:37,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:38,084 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:38,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573255306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:38,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:38,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 21:17:38,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877847115] [2021-06-05 21:17:38,084 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:17:38,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:38,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:17:38,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:17:38,085 INFO L87 Difference]: Start difference. First operand 131576 states and 486941 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:39,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:39,047 INFO L93 Difference]: Finished difference Result 132177 states and 488586 transitions. [2021-06-05 21:17:39,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:17:39,048 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 21:17:39,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:39,417 INFO L225 Difference]: With dead ends: 132177 [2021-06-05 21:17:39,417 INFO L226 Difference]: Without dead ends: 132066 [2021-06-05 21:17:39,417 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 328.1ms TimeCoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:17:40,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132066 states. [2021-06-05 21:17:41,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132066 to 131642. [2021-06-05 21:17:41,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131642 states, 131641 states have (on average 3.700853077688562) internal successors, (487184), 131641 states have internal predecessors, (487184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:42,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131642 states to 131642 states and 487184 transitions. [2021-06-05 21:17:42,759 INFO L78 Accepts]: Start accepts. Automaton has 131642 states and 487184 transitions. Word has length 33 [2021-06-05 21:17:42,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:42,759 INFO L482 AbstractCegarLoop]: Abstraction has 131642 states and 487184 transitions. [2021-06-05 21:17:42,759 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:42,759 INFO L276 IsEmpty]: Start isEmpty. Operand 131642 states and 487184 transitions. [2021-06-05 21:17:43,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 21:17:43,016 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:43,016 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:43,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-06-05 21:17:43,217 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:43,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:43,217 INFO L82 PathProgramCache]: Analyzing trace with hash -773235108, now seen corresponding path program 131 times [2021-06-05 21:17:43,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:43,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625313321] [2021-06-05 21:17:43,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:43,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:43,305 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:43,305 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:43,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625313321] [2021-06-05 21:17:43,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625313321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:43,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866914239] [2021-06-05 21:17:43,305 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:43,329 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 21:17:43,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:43,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:17:43,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:43,535 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:43,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866914239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:43,536 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:43,536 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 21:17:43,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182497035] [2021-06-05 21:17:43,536 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:17:43,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:43,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:17:43,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:17:43,536 INFO L87 Difference]: Start difference. First operand 131642 states and 487184 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:45,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:45,095 INFO L93 Difference]: Finished difference Result 132137 states and 488592 transitions. [2021-06-05 21:17:45,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:17:45,096 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 21:17:45,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:45,463 INFO L225 Difference]: With dead ends: 132137 [2021-06-05 21:17:45,463 INFO L226 Difference]: Without dead ends: 132107 [2021-06-05 21:17:45,464 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 315.2ms TimeCoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:17:45,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132107 states. [2021-06-05 21:17:47,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132107 to 131739. [2021-06-05 21:17:47,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131739 states, 131738 states have (on average 3.7007697095750656) internal successors, (487532), 131738 states have internal predecessors, (487532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:48,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131739 states to 131739 states and 487532 transitions. [2021-06-05 21:17:48,234 INFO L78 Accepts]: Start accepts. Automaton has 131739 states and 487532 transitions. Word has length 33 [2021-06-05 21:17:48,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:48,234 INFO L482 AbstractCegarLoop]: Abstraction has 131739 states and 487532 transitions. [2021-06-05 21:17:48,234 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:48,234 INFO L276 IsEmpty]: Start isEmpty. Operand 131739 states and 487532 transitions. [2021-06-05 21:17:48,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 21:17:48,491 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:48,491 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:48,691 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-06-05 21:17:48,691 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:48,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:48,692 INFO L82 PathProgramCache]: Analyzing trace with hash -172389872, now seen corresponding path program 132 times [2021-06-05 21:17:48,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:48,692 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830064207] [2021-06-05 21:17:48,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:48,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:48,780 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:48,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:48,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830064207] [2021-06-05 21:17:48,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830064207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:48,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29468494] [2021-06-05 21:17:48,781 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:48,807 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:17:48,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:48,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:17:48,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:49,038 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:49,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29468494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:49,038 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:49,038 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 21:17:49,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504653338] [2021-06-05 21:17:49,038 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:17:49,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:49,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:17:49,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:17:49,039 INFO L87 Difference]: Start difference. First operand 131739 states and 487532 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:50,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:50,462 INFO L93 Difference]: Finished difference Result 132172 states and 488791 transitions. [2021-06-05 21:17:50,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:17:50,462 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 21:17:50,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:50,866 INFO L225 Difference]: With dead ends: 132172 [2021-06-05 21:17:50,866 INFO L226 Difference]: Without dead ends: 132142 [2021-06-05 21:17:50,866 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 310.8ms TimeCoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:17:51,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132142 states. [2021-06-05 21:17:53,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132142 to 131868. [2021-06-05 21:17:53,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131868 states, 131867 states have (on average 3.7004481788468686) internal successors, (487967), 131867 states have internal predecessors, (487967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:53,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131868 states to 131868 states and 487967 transitions. [2021-06-05 21:17:53,578 INFO L78 Accepts]: Start accepts. Automaton has 131868 states and 487967 transitions. Word has length 33 [2021-06-05 21:17:53,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:53,578 INFO L482 AbstractCegarLoop]: Abstraction has 131868 states and 487967 transitions. [2021-06-05 21:17:53,578 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:53,578 INFO L276 IsEmpty]: Start isEmpty. Operand 131868 states and 487967 transitions. [2021-06-05 21:17:53,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 21:17:53,814 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:53,814 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:54,015 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:54,015 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:54,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:54,015 INFO L82 PathProgramCache]: Analyzing trace with hash 1751652820, now seen corresponding path program 133 times [2021-06-05 21:17:54,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:54,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893810145] [2021-06-05 21:17:54,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:54,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:54,572 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:54,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:54,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893810145] [2021-06-05 21:17:54,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893810145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:54,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494785300] [2021-06-05 21:17:54,573 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 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:54,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:54,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:17:54,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:54,904 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:54,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494785300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:54,904 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:54,904 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 21:17:54,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780288560] [2021-06-05 21:17:54,904 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:17:54,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:54,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:17:54,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:17:54,905 INFO L87 Difference]: Start difference. First operand 131868 states and 487967 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:55,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:55,827 INFO L93 Difference]: Finished difference Result 132329 states and 489260 transitions. [2021-06-05 21:17:55,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:17:55,827 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 21:17:55,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:56,227 INFO L225 Difference]: With dead ends: 132329 [2021-06-05 21:17:56,228 INFO L226 Difference]: Without dead ends: 132261 [2021-06-05 21:17:56,228 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 752.7ms TimeCoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:17:56,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132261 states. [2021-06-05 21:17:58,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132261 to 131985. [2021-06-05 21:17:58,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131985 states, 131984 states have (on average 3.7004258091889928) internal successors, (488397), 131984 states have internal predecessors, (488397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:59,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131985 states to 131985 states and 488397 transitions. [2021-06-05 21:17:59,560 INFO L78 Accepts]: Start accepts. Automaton has 131985 states and 488397 transitions. Word has length 33 [2021-06-05 21:17:59,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:59,560 INFO L482 AbstractCegarLoop]: Abstraction has 131985 states and 488397 transitions. [2021-06-05 21:17:59,560 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:59,560 INFO L276 IsEmpty]: Start isEmpty. Operand 131985 states and 488397 transitions. [2021-06-05 21:17:59,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 21:17:59,926 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:59,926 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:00,126 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:00,126 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:00,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:00,127 INFO L82 PathProgramCache]: Analyzing trace with hash -230700392, now seen corresponding path program 134 times [2021-06-05 21:18:00,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:00,127 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757923895] [2021-06-05 21:18:00,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:00,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:00,217 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:00,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:00,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757923895] [2021-06-05 21:18:00,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757923895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:00,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255002314] [2021-06-05 21:18:00,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:00,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:18:00,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:18:00,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:18:00,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:00,440 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:00,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255002314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:00,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:00,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 21:18:00,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355060378] [2021-06-05 21:18:00,441 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:18:00,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:00,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:18:00,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:18:00,441 INFO L87 Difference]: Start difference. First operand 131985 states and 488397 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:01,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:01,373 INFO L93 Difference]: Finished difference Result 132441 states and 489638 transitions. [2021-06-05 21:18:01,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:18:01,373 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 21:18:01,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:02,259 INFO L225 Difference]: With dead ends: 132441 [2021-06-05 21:18:02,259 INFO L226 Difference]: Without dead ends: 132361 [2021-06-05 21:18:02,259 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 282.7ms TimeCoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:18:02,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132361 states. [2021-06-05 21:18:04,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132361 to 131999. [2021-06-05 21:18:04,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131999 states, 131998 states have (on average 3.700328792860498) internal successors, (488436), 131998 states have internal predecessors, (488436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:05,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131999 states to 131999 states and 488436 transitions. [2021-06-05 21:18:05,067 INFO L78 Accepts]: Start accepts. Automaton has 131999 states and 488436 transitions. Word has length 33 [2021-06-05 21:18:05,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:05,067 INFO L482 AbstractCegarLoop]: Abstraction has 131999 states and 488436 transitions. [2021-06-05 21:18:05,067 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:05,067 INFO L276 IsEmpty]: Start isEmpty. Operand 131999 states and 488436 transitions. [2021-06-05 21:18:05,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 21:18:05,323 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:18:05,323 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:05,523 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:05,524 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:05,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:05,524 INFO L82 PathProgramCache]: Analyzing trace with hash -414385964, now seen corresponding path program 135 times [2021-06-05 21:18:05,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:05,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296449789] [2021-06-05 21:18:05,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:05,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:05,613 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:05,613 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:05,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296449789] [2021-06-05 21:18:05,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296449789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:05,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208452915] [2021-06-05 21:18:05,613 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:05,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:18:05,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:18:05,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:18:05,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:05,880 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:05,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208452915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:05,880 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:05,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 21:18:05,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837179349] [2021-06-05 21:18:05,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:18:05,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:05,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:18:05,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:18:05,881 INFO L87 Difference]: Start difference. First operand 131999 states and 488436 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:07,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:07,221 INFO L93 Difference]: Finished difference Result 132789 states and 490695 transitions. [2021-06-05 21:18:07,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:18:07,221 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 21:18:07,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:07,631 INFO L225 Difference]: With dead ends: 132789 [2021-06-05 21:18:07,631 INFO L226 Difference]: Without dead ends: 132700 [2021-06-05 21:18:07,631 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 298.1ms TimeCoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:18:07,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132700 states. [2021-06-05 21:18:09,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132700 to 132304. [2021-06-05 21:18:09,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132304 states, 132303 states have (on average 3.699349221106097) internal successors, (489435), 132303 states have internal predecessors, (489435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:10,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132304 states to 132304 states and 489435 transitions. [2021-06-05 21:18:10,385 INFO L78 Accepts]: Start accepts. Automaton has 132304 states and 489435 transitions. Word has length 33 [2021-06-05 21:18:10,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:10,386 INFO L482 AbstractCegarLoop]: Abstraction has 132304 states and 489435 transitions. [2021-06-05 21:18:10,386 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:10,386 INFO L276 IsEmpty]: Start isEmpty. Operand 132304 states and 489435 transitions. [2021-06-05 21:18:10,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 21:18:10,626 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:18:10,626 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:10,827 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable143 [2021-06-05 21:18:10,827 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:10,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:10,827 INFO L82 PathProgramCache]: Analyzing trace with hash 1898228120, now seen corresponding path program 136 times [2021-06-05 21:18:10,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:10,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714993742] [2021-06-05 21:18:10,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:10,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:10,909 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:10,909 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:10,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714993742] [2021-06-05 21:18:10,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714993742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:10,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418991114] [2021-06-05 21:18:10,910 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:10,932 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:18:10,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:18:10,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:18:10,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:11,132 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:11,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418991114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:11,132 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:11,132 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 21:18:11,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59818905] [2021-06-05 21:18:11,132 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:18:11,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:11,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:18:11,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:18:11,133 INFO L87 Difference]: Start difference. First operand 132304 states and 489435 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:12,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:12,502 INFO L93 Difference]: Finished difference Result 132973 states and 491280 transitions. [2021-06-05 21:18:12,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:18:12,503 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 21:18:12,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:12,888 INFO L225 Difference]: With dead ends: 132973 [2021-06-05 21:18:12,888 INFO L226 Difference]: Without dead ends: 132862 [2021-06-05 21:18:12,889 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 280.1ms TimeCoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:18:13,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132862 states. [2021-06-05 21:18:15,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132862 to 132462. [2021-06-05 21:18:15,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132462 states, 132461 states have (on average 3.698794362114132) internal successors, (489946), 132461 states have internal predecessors, (489946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:15,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132462 states to 132462 states and 489946 transitions. [2021-06-05 21:18:15,819 INFO L78 Accepts]: Start accepts. Automaton has 132462 states and 489946 transitions. Word has length 33 [2021-06-05 21:18:15,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:15,819 INFO L482 AbstractCegarLoop]: Abstraction has 132462 states and 489946 transitions. [2021-06-05 21:18:15,820 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:15,820 INFO L276 IsEmpty]: Start isEmpty. Operand 132462 states and 489946 transitions. [2021-06-05 21:18:16,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 21:18:16,904 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:18:16,904 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:17,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-06-05 21:18:17,120 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:17,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:17,120 INFO L82 PathProgramCache]: Analyzing trace with hash -776648552, now seen corresponding path program 137 times [2021-06-05 21:18:17,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:17,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334948771] [2021-06-05 21:18:17,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:17,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:17,216 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:17,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:17,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334948771] [2021-06-05 21:18:17,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334948771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:17,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337297461] [2021-06-05 21:18:17,217 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:17,243 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:18:17,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:18:17,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:18:17,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:17,487 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:17,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337297461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:17,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:17,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 21:18:17,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720315915] [2021-06-05 21:18:17,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:18:17,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:17,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:18:17,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:18:17,488 INFO L87 Difference]: Start difference. First operand 132462 states and 489946 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:18,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:18,573 INFO L93 Difference]: Finished difference Result 133313 states and 492428 transitions. [2021-06-05 21:18:18,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:18:18,574 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 21:18:18,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:18,988 INFO L225 Difference]: With dead ends: 133313 [2021-06-05 21:18:18,988 INFO L226 Difference]: Without dead ends: 133267 [2021-06-05 21:18:18,988 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 321.8ms TimeCoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:18:19,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133267 states. [2021-06-05 21:18:21,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133267 to 132771. [2021-06-05 21:18:21,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132771 states, 132770 states have (on average 3.697635007908413) internal successors, (490935), 132770 states have internal predecessors, (490935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:22,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132771 states to 132771 states and 490935 transitions. [2021-06-05 21:18:22,155 INFO L78 Accepts]: Start accepts. Automaton has 132771 states and 490935 transitions. Word has length 33 [2021-06-05 21:18:22,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:22,155 INFO L482 AbstractCegarLoop]: Abstraction has 132771 states and 490935 transitions. [2021-06-05 21:18:22,155 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:22,155 INFO L276 IsEmpty]: Start isEmpty. Operand 132771 states and 490935 transitions. [2021-06-05 21:18:22,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 21:18:22,469 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:18:22,469 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:22,669 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-06-05 21:18:22,669 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:22,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:22,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1081481172, now seen corresponding path program 138 times [2021-06-05 21:18:22,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:22,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913099643] [2021-06-05 21:18:22,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:22,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:22,759 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:22,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:22,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913099643] [2021-06-05 21:18:22,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913099643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:22,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512412326] [2021-06-05 21:18:22,759 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:22,784 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:18:22,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:18:22,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:18:22,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:23,003 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:23,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512412326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:23,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:23,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 21:18:23,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340852757] [2021-06-05 21:18:23,003 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:18:23,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:23,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:18:23,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:18:23,004 INFO L87 Difference]: Start difference. First operand 132771 states and 490935 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:24,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:24,547 INFO L93 Difference]: Finished difference Result 133655 states and 493544 transitions. [2021-06-05 21:18:24,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:18:24,548 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 21:18:24,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:24,924 INFO L225 Difference]: With dead ends: 133655 [2021-06-05 21:18:24,925 INFO L226 Difference]: Without dead ends: 133607 [2021-06-05 21:18:24,925 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 294.9ms TimeCoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:18:25,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133607 states. [2021-06-05 21:18:27,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133607 to 133055. [2021-06-05 21:18:27,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133055 states, 133054 states have (on average 3.697047815172787) internal successors, (491907), 133054 states have internal predecessors, (491907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:27,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133055 states to 133055 states and 491907 transitions. [2021-06-05 21:18:27,808 INFO L78 Accepts]: Start accepts. Automaton has 133055 states and 491907 transitions. Word has length 33 [2021-06-05 21:18:27,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:27,808 INFO L482 AbstractCegarLoop]: Abstraction has 133055 states and 491907 transitions. [2021-06-05 21:18:27,808 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:27,808 INFO L276 IsEmpty]: Start isEmpty. Operand 133055 states and 491907 transitions. [2021-06-05 21:18:28,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 21:18:28,064 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:18:28,064 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:28,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-06-05 21:18:28,265 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:28,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:28,265 INFO L82 PathProgramCache]: Analyzing trace with hash -900872040, now seen corresponding path program 139 times [2021-06-05 21:18:28,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:28,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025600322] [2021-06-05 21:18:28,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:28,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:28,354 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:28,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:28,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025600322] [2021-06-05 21:18:28,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025600322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:28,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218027224] [2021-06-05 21:18:28,354 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 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:28,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:28,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:18:28,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:28,595 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:28,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218027224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:28,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:28,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 21:18:28,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205644901] [2021-06-05 21:18:28,595 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:18:28,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:28,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:18:28,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:18:28,595 INFO L87 Difference]: Start difference. First operand 133055 states and 491907 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:30,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:30,034 INFO L93 Difference]: Finished difference Result 134042 states and 494886 transitions. [2021-06-05 21:18:30,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:18:30,034 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 21:18:30,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:30,438 INFO L225 Difference]: With dead ends: 134042 [2021-06-05 21:18:30,438 INFO L226 Difference]: Without dead ends: 133996 [2021-06-05 21:18:30,439 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 291.9ms TimeCoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:18:30,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133996 states. [2021-06-05 21:18:32,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133996 to 133457. [2021-06-05 21:18:32,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133457 states, 133456 states have (on average 3.696132058506174) internal successors, (493271), 133456 states have internal predecessors, (493271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:33,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133457 states to 133457 states and 493271 transitions. [2021-06-05 21:18:33,317 INFO L78 Accepts]: Start accepts. Automaton has 133457 states and 493271 transitions. Word has length 33 [2021-06-05 21:18:33,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:33,317 INFO L482 AbstractCegarLoop]: Abstraction has 133457 states and 493271 transitions. [2021-06-05 21:18:33,318 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:33,318 INFO L276 IsEmpty]: Start isEmpty. Operand 133457 states and 493271 transitions. [2021-06-05 21:18:34,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 21:18:34,092 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:18:34,092 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:34,307 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-06-05 21:18:34,307 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:34,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:34,308 INFO L82 PathProgramCache]: Analyzing trace with hash 719218584, now seen corresponding path program 140 times [2021-06-05 21:18:34,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:34,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61463229] [2021-06-05 21:18:34,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:34,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:34,396 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:34,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:34,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61463229] [2021-06-05 21:18:34,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61463229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:34,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847554274] [2021-06-05 21:18:34,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:34,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:18:34,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:18:34,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:18:34,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:34,643 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:34,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847554274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:34,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:34,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 21:18:34,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595250595] [2021-06-05 21:18:34,643 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:18:34,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:34,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:18:34,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:18:34,644 INFO L87 Difference]: Start difference. First operand 133457 states and 493271 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:35,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:35,675 INFO L93 Difference]: Finished difference Result 134285 states and 495729 transitions. [2021-06-05 21:18:35,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:18:35,675 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 21:18:35,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:36,083 INFO L225 Difference]: With dead ends: 134285 [2021-06-05 21:18:36,083 INFO L226 Difference]: Without dead ends: 134239 [2021-06-05 21:18:36,083 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 309.6ms TimeCoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:18:36,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134239 states. [2021-06-05 21:18:38,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134239 to 133729. [2021-06-05 21:18:38,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133729 states, 133728 states have (on average 3.6952844580043074) internal successors, (494163), 133728 states have internal predecessors, (494163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:39,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133729 states to 133729 states and 494163 transitions. [2021-06-05 21:18:39,595 INFO L78 Accepts]: Start accepts. Automaton has 133729 states and 494163 transitions. Word has length 33 [2021-06-05 21:18:39,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:39,595 INFO L482 AbstractCegarLoop]: Abstraction has 133729 states and 494163 transitions. [2021-06-05 21:18:39,595 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:39,595 INFO L276 IsEmpty]: Start isEmpty. Operand 133729 states and 494163 transitions. [2021-06-05 21:18:39,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 21:18:39,889 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:18:39,889 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:40,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2021-06-05 21:18:40,090 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:40,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:40,090 INFO L82 PathProgramCache]: Analyzing trace with hash -1446820200, now seen corresponding path program 141 times [2021-06-05 21:18:40,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:40,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799358] [2021-06-05 21:18:40,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:40,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:40,184 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:40,184 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:40,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799358] [2021-06-05 21:18:40,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:40,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467978269] [2021-06-05 21:18:40,184 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:40,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:18:40,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:18:40,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:18:40,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:40,442 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:40,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467978269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:40,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:40,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 21:18:40,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653566992] [2021-06-05 21:18:40,442 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:18:40,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:40,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:18:40,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:18:40,443 INFO L87 Difference]: Start difference. First operand 133729 states and 494163 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:41,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:41,941 INFO L93 Difference]: Finished difference Result 134286 states and 495782 transitions. [2021-06-05 21:18:41,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:18:41,942 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 21:18:41,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:42,318 INFO L225 Difference]: With dead ends: 134286 [2021-06-05 21:18:42,318 INFO L226 Difference]: Without dead ends: 134256 [2021-06-05 21:18:42,318 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 330.2ms TimeCoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:18:42,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134256 states. [2021-06-05 21:18:44,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134256 to 133862. [2021-06-05 21:18:44,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133862 states, 133861 states have (on average 3.6949522265633754) internal successors, (494610), 133861 states have internal predecessors, (494610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:45,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133862 states to 133862 states and 494610 transitions. [2021-06-05 21:18:45,269 INFO L78 Accepts]: Start accepts. Automaton has 133862 states and 494610 transitions. Word has length 33 [2021-06-05 21:18:45,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:45,269 INFO L482 AbstractCegarLoop]: Abstraction has 133862 states and 494610 transitions. [2021-06-05 21:18:45,269 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:45,269 INFO L276 IsEmpty]: Start isEmpty. Operand 133862 states and 494610 transitions. [2021-06-05 21:18:45,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 21:18:45,544 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:18:45,544 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:45,745 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:45,745 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:45,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:45,745 INFO L82 PathProgramCache]: Analyzing trace with hash -1180848474, now seen corresponding path program 142 times [2021-06-05 21:18:45,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:45,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785376352] [2021-06-05 21:18:45,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:45,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:45,837 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:45,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:45,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785376352] [2021-06-05 21:18:45,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785376352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:45,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588377348] [2021-06-05 21:18:45,838 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:45,861 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:18:45,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:18:45,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:18:45,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:46,146 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:46,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588377348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:46,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:46,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 21:18:46,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822133344] [2021-06-05 21:18:46,146 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:18:46,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:46,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:18:46,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=415, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:18:46,149 INFO L87 Difference]: Start difference. First operand 133862 states and 494610 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:47,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:47,681 INFO L93 Difference]: Finished difference Result 134087 states and 495235 transitions. [2021-06-05 21:18:47,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:18:47,682 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 21:18:47,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:48,071 INFO L225 Difference]: With dead ends: 134087 [2021-06-05 21:18:48,071 INFO L226 Difference]: Without dead ends: 134059 [2021-06-05 21:18:48,072 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 433.4ms TimeCoverageRelationStatistics Valid=77, Invalid=735, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:18:48,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134059 states. [2021-06-05 21:18:50,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134059 to 133901. [2021-06-05 21:18:50,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133901 states, 133900 states have (on average 3.6948319641523524) internal successors, (494738), 133900 states have internal predecessors, (494738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:51,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133901 states to 133901 states and 494738 transitions. [2021-06-05 21:18:51,045 INFO L78 Accepts]: Start accepts. Automaton has 133901 states and 494738 transitions. Word has length 33 [2021-06-05 21:18:51,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:51,045 INFO L482 AbstractCegarLoop]: Abstraction has 133901 states and 494738 transitions. [2021-06-05 21:18:51,045 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:51,045 INFO L276 IsEmpty]: Start isEmpty. Operand 133901 states and 494738 transitions. [2021-06-05 21:18:51,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 21:18:51,821 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:18:51,821 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:52,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2021-06-05 21:18:52,037 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:52,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:52,037 INFO L82 PathProgramCache]: Analyzing trace with hash 886630802, now seen corresponding path program 143 times [2021-06-05 21:18:52,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:52,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7354795] [2021-06-05 21:18:52,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:52,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:52,125 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:52,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:52,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7354795] [2021-06-05 21:18:52,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7354795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:52,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518663691] [2021-06-05 21:18:52,125 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:52,149 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:18:52,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:18:52,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:18:52,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:52,374 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:52,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518663691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:52,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:52,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 21:18:52,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975108767] [2021-06-05 21:18:52,375 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:18:52,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:52,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:18:52,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:18:52,375 INFO L87 Difference]: Start difference. First operand 133901 states and 494738 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:53,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:53,349 INFO L93 Difference]: Finished difference Result 134211 states and 495550 transitions. [2021-06-05 21:18:53,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:18:53,349 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 21:18:53,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:54,256 INFO L225 Difference]: With dead ends: 134211 [2021-06-05 21:18:54,256 INFO L226 Difference]: Without dead ends: 134069 [2021-06-05 21:18:54,257 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 348.8ms TimeCoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:18:54,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134069 states. [2021-06-05 21:18:56,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134069 to 133952. [2021-06-05 21:18:56,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133952 states, 133951 states have (on average 3.694612208942076) internal successors, (494897), 133951 states have internal predecessors, (494897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:57,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133952 states to 133952 states and 494897 transitions. [2021-06-05 21:18:57,137 INFO L78 Accepts]: Start accepts. Automaton has 133952 states and 494897 transitions. Word has length 33 [2021-06-05 21:18:57,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:57,137 INFO L482 AbstractCegarLoop]: Abstraction has 133952 states and 494897 transitions. [2021-06-05 21:18:57,137 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:57,137 INFO L276 IsEmpty]: Start isEmpty. Operand 133952 states and 494897 transitions. [2021-06-05 21:18:57,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 21:18:57,398 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:18:57,398 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:57,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:57,599 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:57,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:57,599 INFO L82 PathProgramCache]: Analyzing trace with hash -1484293802, now seen corresponding path program 144 times [2021-06-05 21:18:57,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:57,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302289441] [2021-06-05 21:18:57,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:57,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:57,691 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:57,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:57,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302289441] [2021-06-05 21:18:57,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302289441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:57,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839903447] [2021-06-05 21:18:57,692 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:57,718 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:18:57,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:18:57,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:18:57,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:57,958 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:57,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839903447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:57,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:57,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 21:18:57,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973035427] [2021-06-05 21:18:57,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:18:57,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:57,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:18:57,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:18:57,959 INFO L87 Difference]: Start difference. First operand 133952 states and 494897 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:59,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:59,446 INFO L93 Difference]: Finished difference Result 134387 states and 496089 transitions. [2021-06-05 21:18:59,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:18:59,447 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 21:18:59,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:59,880 INFO L225 Difference]: With dead ends: 134387 [2021-06-05 21:18:59,880 INFO L226 Difference]: Without dead ends: 134277 [2021-06-05 21:18:59,880 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 353.9ms TimeCoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:19:00,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134277 states. [2021-06-05 21:19:02,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134277 to 134057. [2021-06-05 21:19:02,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134057 states, 134056 states have (on average 3.694254639852002) internal successors, (495237), 134056 states have internal predecessors, (495237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:02,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134057 states to 134057 states and 495237 transitions. [2021-06-05 21:19:02,695 INFO L78 Accepts]: Start accepts. Automaton has 134057 states and 495237 transitions. Word has length 33 [2021-06-05 21:19:02,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:02,695 INFO L482 AbstractCegarLoop]: Abstraction has 134057 states and 495237 transitions. [2021-06-05 21:19:02,695 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:02,695 INFO L276 IsEmpty]: Start isEmpty. Operand 134057 states and 495237 transitions. [2021-06-05 21:19:02,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 21:19:02,947 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:02,947 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:03,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:03,148 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:03,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:03,148 INFO L82 PathProgramCache]: Analyzing trace with hash 828320282, now seen corresponding path program 145 times [2021-06-05 21:19:03,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:03,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318035867] [2021-06-05 21:19:03,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:03,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:03,234 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:03,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:03,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318035867] [2021-06-05 21:19:03,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318035867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:03,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392180911] [2021-06-05 21:19:03,234 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 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:03,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:03,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:19:03,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:03,456 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:03,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392180911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:03,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:03,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 21:19:03,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211418823] [2021-06-05 21:19:03,460 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:19:03,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:03,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:19:03,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:19:03,460 INFO L87 Difference]: Start difference. First operand 134057 states and 495237 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:05,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:05,197 INFO L93 Difference]: Finished difference Result 134490 states and 496428 transitions. [2021-06-05 21:19:05,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:19:05,197 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 21:19:05,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:05,679 INFO L225 Difference]: With dead ends: 134490 [2021-06-05 21:19:05,679 INFO L226 Difference]: Without dead ends: 134406 [2021-06-05 21:19:05,679 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 781.7ms TimeCoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:19:05,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134406 states. [2021-06-05 21:19:08,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134406 to 134109. [2021-06-05 21:19:08,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134109 states, 134108 states have (on average 3.694343365049065) internal successors, (495441), 134108 states have internal predecessors, (495441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:08,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134109 states to 134109 states and 495441 transitions. [2021-06-05 21:19:08,637 INFO L78 Accepts]: Start accepts. Automaton has 134109 states and 495441 transitions. Word has length 33 [2021-06-05 21:19:08,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:08,637 INFO L482 AbstractCegarLoop]: Abstraction has 134109 states and 495441 transitions. [2021-06-05 21:19:08,638 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:08,638 INFO L276 IsEmpty]: Start isEmpty. Operand 134109 states and 495441 transitions. [2021-06-05 21:19:08,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 21:19:08,898 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:08,898 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:09,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:09,105 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:09,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:09,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1915604274, now seen corresponding path program 146 times [2021-06-05 21:19:09,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:09,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916374894] [2021-06-05 21:19:09,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:09,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:09,190 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:09,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:09,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916374894] [2021-06-05 21:19:09,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916374894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:09,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934055332] [2021-06-05 21:19:09,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:09,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:19:09,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:19:09,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:19:09,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:09,433 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:09,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934055332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:09,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:09,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 21:19:09,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735678739] [2021-06-05 21:19:09,433 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:19:09,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:09,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:19:09,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:19:09,434 INFO L87 Difference]: Start difference. First operand 134109 states and 495441 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:10,062 WARN L205 SmtUtils]: Spent 472.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 16 [2021-06-05 21:19:10,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:10,868 INFO L93 Difference]: Finished difference Result 134427 states and 496277 transitions. [2021-06-05 21:19:10,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:19:10,868 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 21:19:10,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:11,242 INFO L225 Difference]: With dead ends: 134427 [2021-06-05 21:19:11,242 INFO L226 Difference]: Without dead ends: 134285 [2021-06-05 21:19:11,243 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 776.4ms TimeCoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:19:11,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134285 states. [2021-06-05 21:19:13,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134285 to 134133. [2021-06-05 21:19:13,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134133 states, 134132 states have (on average 3.694248948796708) internal successors, (495517), 134132 states have internal predecessors, (495517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:14,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134133 states to 134133 states and 495517 transitions. [2021-06-05 21:19:14,035 INFO L78 Accepts]: Start accepts. Automaton has 134133 states and 495517 transitions. Word has length 33 [2021-06-05 21:19:14,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:14,036 INFO L482 AbstractCegarLoop]: Abstraction has 134133 states and 495517 transitions. [2021-06-05 21:19:14,036 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:14,036 INFO L276 IsEmpty]: Start isEmpty. Operand 134133 states and 495517 transitions. [2021-06-05 21:19:14,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 21:19:14,783 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:14,783 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:14,983 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:14,984 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:14,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:14,984 INFO L82 PathProgramCache]: Analyzing trace with hash 8438418, now seen corresponding path program 147 times [2021-06-05 21:19:14,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:14,984 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077374511] [2021-06-05 21:19:14,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:14,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:15,075 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:15,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:15,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077374511] [2021-06-05 21:19:15,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077374511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:15,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837705555] [2021-06-05 21:19:15,076 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:15,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:19:15,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:19:15,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:19:15,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:15,290 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:15,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837705555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:15,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:15,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 21:19:15,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337294885] [2021-06-05 21:19:15,291 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:19:15,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:15,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:19:15,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:19:15,291 INFO L87 Difference]: Start difference. First operand 134133 states and 495517 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:16,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:16,219 INFO L93 Difference]: Finished difference Result 134488 states and 496453 transitions. [2021-06-05 21:19:16,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:19:16,219 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 21:19:16,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:16,613 INFO L225 Difference]: With dead ends: 134488 [2021-06-05 21:19:16,613 INFO L226 Difference]: Without dead ends: 134378 [2021-06-05 21:19:16,613 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 302.6ms TimeCoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:19:17,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134378 states. [2021-06-05 21:19:19,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134378 to 134238. [2021-06-05 21:19:19,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134238 states, 134237 states have (on average 3.6939815401118916) internal successors, (495869), 134237 states have internal predecessors, (495869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:20,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134238 states to 134238 states and 495869 transitions. [2021-06-05 21:19:20,126 INFO L78 Accepts]: Start accepts. Automaton has 134238 states and 495869 transitions. Word has length 33 [2021-06-05 21:19:20,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:20,126 INFO L482 AbstractCegarLoop]: Abstraction has 134238 states and 495869 transitions. [2021-06-05 21:19:20,127 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:20,127 INFO L276 IsEmpty]: Start isEmpty. Operand 134238 states and 495869 transitions. [2021-06-05 21:19:20,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 21:19:20,403 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:20,403 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:20,603 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-06-05 21:19:20,603 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:20,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:20,603 INFO L82 PathProgramCache]: Analyzing trace with hash -1973914794, now seen corresponding path program 148 times [2021-06-05 21:19:20,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:20,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752539468] [2021-06-05 21:19:20,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:20,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:20,716 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:20,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:20,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752539468] [2021-06-05 21:19:20,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752539468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:20,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915148906] [2021-06-05 21:19:20,717 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:20,740 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:19:20,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:19:20,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:19:20,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:20,945 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:20,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915148906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:20,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:20,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 21:19:20,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249514039] [2021-06-05 21:19:20,945 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:19:20,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:20,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:19:20,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:19:20,946 INFO L87 Difference]: Start difference. First operand 134238 states and 495869 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:22,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:22,371 INFO L93 Difference]: Finished difference Result 134606 states and 496835 transitions. [2021-06-05 21:19:22,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:19:22,372 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 21:19:22,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:22,769 INFO L225 Difference]: With dead ends: 134606 [2021-06-05 21:19:22,769 INFO L226 Difference]: Without dead ends: 134470 [2021-06-05 21:19:22,769 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 296.0ms TimeCoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:19:22,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134470 states. [2021-06-05 21:19:25,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134470 to 134329. [2021-06-05 21:19:25,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134329 states, 134328 states have (on average 3.6937347388481925) internal successors, (496172), 134328 states have internal predecessors, (496172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:25,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134329 states to 134329 states and 496172 transitions. [2021-06-05 21:19:25,677 INFO L78 Accepts]: Start accepts. Automaton has 134329 states and 496172 transitions. Word has length 33 [2021-06-05 21:19:25,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:25,677 INFO L482 AbstractCegarLoop]: Abstraction has 134329 states and 496172 transitions. [2021-06-05 21:19:25,677 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:25,677 INFO L276 IsEmpty]: Start isEmpty. Operand 134329 states and 496172 transitions. [2021-06-05 21:19:25,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 21:19:25,942 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:25,943 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:26,143 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-06-05 21:19:26,143 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:26,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:26,143 INFO L82 PathProgramCache]: Analyzing trace with hash 2137366930, now seen corresponding path program 149 times [2021-06-05 21:19:26,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:26,144 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677230723] [2021-06-05 21:19:26,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:26,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:26,229 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:26,229 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:26,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677230723] [2021-06-05 21:19:26,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677230723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:26,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943983151] [2021-06-05 21:19:26,229 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:26,253 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:19:26,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:19:26,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:19:26,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:26,511 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:26,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943983151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:26,511 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:26,511 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 21:19:26,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019803737] [2021-06-05 21:19:26,511 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:19:26,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:26,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:19:26,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:19:26,512 INFO L87 Difference]: Start difference. First operand 134329 states and 496172 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:27,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:27,995 INFO L93 Difference]: Finished difference Result 134895 states and 497770 transitions. [2021-06-05 21:19:27,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:19:27,995 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 21:19:27,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:28,403 INFO L225 Difference]: With dead ends: 134895 [2021-06-05 21:19:28,403 INFO L226 Difference]: Without dead ends: 134785 [2021-06-05 21:19:28,403 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 330.5ms TimeCoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:19:28,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134785 states. [2021-06-05 21:19:30,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134785 to 134598. [2021-06-05 21:19:30,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134598 states, 134597 states have (on average 3.692853481132566) internal successors, (497047), 134597 states have internal predecessors, (497047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:31,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134598 states to 134598 states and 497047 transitions. [2021-06-05 21:19:31,255 INFO L78 Accepts]: Start accepts. Automaton has 134598 states and 497047 transitions. Word has length 33 [2021-06-05 21:19:31,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:31,255 INFO L482 AbstractCegarLoop]: Abstraction has 134598 states and 497047 transitions. [2021-06-05 21:19:31,255 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:31,255 INFO L276 IsEmpty]: Start isEmpty. Operand 134598 states and 497047 transitions. [2021-06-05 21:19:32,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 21:19:32,083 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:32,083 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:32,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-06-05 21:19:32,297 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:32,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:32,297 INFO L82 PathProgramCache]: Analyzing trace with hash 155013718, now seen corresponding path program 150 times [2021-06-05 21:19:32,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:32,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698479604] [2021-06-05 21:19:32,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:32,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:32,381 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:32,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:32,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698479604] [2021-06-05 21:19:32,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698479604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:32,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432725368] [2021-06-05 21:19:32,381 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:32,404 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:19:32,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:19:32,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:19:32,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:32,618 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:32,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432725368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:32,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:32,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 21:19:32,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988377483] [2021-06-05 21:19:32,619 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:19:32,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:32,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:19:32,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:19:32,619 INFO L87 Difference]: Start difference. First operand 134598 states and 497047 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:33,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:33,642 INFO L93 Difference]: Finished difference Result 135111 states and 498442 transitions. [2021-06-05 21:19:33,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:19:33,642 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 21:19:33,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:34,607 INFO L225 Difference]: With dead ends: 135111 [2021-06-05 21:19:34,607 INFO L226 Difference]: Without dead ends: 134975 [2021-06-05 21:19:34,607 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 303.8ms TimeCoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:19:34,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134975 states. [2021-06-05 21:19:36,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134975 to 134792. [2021-06-05 21:19:36,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134792 states, 134791 states have (on average 3.6920269157436327) internal successors, (497652), 134791 states have internal predecessors, (497652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:37,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134792 states to 134792 states and 497652 transitions. [2021-06-05 21:19:37,670 INFO L78 Accepts]: Start accepts. Automaton has 134792 states and 497652 transitions. Word has length 33 [2021-06-05 21:19:37,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:37,670 INFO L482 AbstractCegarLoop]: Abstraction has 134792 states and 497652 transitions. [2021-06-05 21:19:37,670 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:37,670 INFO L276 IsEmpty]: Start isEmpty. Operand 134792 states and 497652 transitions. [2021-06-05 21:19:37,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 21:19:37,940 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:37,940 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:38,141 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-06-05 21:19:38,141 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:38,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:38,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1775104342, now seen corresponding path program 151 times [2021-06-05 21:19:38,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:38,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039149604] [2021-06-05 21:19:38,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:38,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:38,232 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:38,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:38,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039149604] [2021-06-05 21:19:38,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039149604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:38,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856906677] [2021-06-05 21:19:38,232 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:38,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:38,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:19:38,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:38,472 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:38,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856906677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:38,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:38,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 21:19:38,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874600757] [2021-06-05 21:19:38,472 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:19:38,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:38,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:19:38,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:19:38,473 INFO L87 Difference]: Start difference. First operand 134792 states and 497652 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:39,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:39,908 INFO L93 Difference]: Finished difference Result 135221 states and 498845 transitions. [2021-06-05 21:19:39,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:19:39,909 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 21:19:39,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:40,302 INFO L225 Difference]: With dead ends: 135221 [2021-06-05 21:19:40,302 INFO L226 Difference]: Without dead ends: 135130 [2021-06-05 21:19:40,302 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 319.9ms TimeCoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:19:40,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135130 states. [2021-06-05 21:19:42,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135130 to 134844. [2021-06-05 21:19:42,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134844 states, 134843 states have (on average 3.6920270240205277) internal successors, (497844), 134843 states have internal predecessors, (497844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:43,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134844 states to 134844 states and 497844 transitions. [2021-06-05 21:19:43,050 INFO L78 Accepts]: Start accepts. Automaton has 134844 states and 497844 transitions. Word has length 33 [2021-06-05 21:19:43,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:43,050 INFO L482 AbstractCegarLoop]: Abstraction has 134844 states and 497844 transitions. [2021-06-05 21:19:43,051 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:43,051 INFO L276 IsEmpty]: Start isEmpty. Operand 134844 states and 497844 transitions. [2021-06-05 21:19:43,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 21:19:43,303 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:43,303 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:43,503 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:43,504 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:43,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:43,504 INFO L82 PathProgramCache]: Analyzing trace with hash 1268459362, now seen corresponding path program 152 times [2021-06-05 21:19:43,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:43,504 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506120976] [2021-06-05 21:19:43,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:43,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:43,592 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:43,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:43,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506120976] [2021-06-05 21:19:43,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506120976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:43,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315558616] [2021-06-05 21:19:43,592 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:43,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:19:43,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:19:43,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:19:43,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:44,152 WARN L205 SmtUtils]: Spent 447.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 17 [2021-06-05 21:19:44,332 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:44,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315558616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:44,333 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:44,333 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 21:19:44,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916748006] [2021-06-05 21:19:44,333 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:19:44,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:44,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:19:44,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=413, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:19:44,333 INFO L87 Difference]: Start difference. First operand 134844 states and 497844 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:45,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:45,312 INFO L93 Difference]: Finished difference Result 135053 states and 498421 transitions. [2021-06-05 21:19:45,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:19:45,312 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 21:19:45,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:45,706 INFO L225 Difference]: With dead ends: 135053 [2021-06-05 21:19:45,706 INFO L226 Difference]: Without dead ends: 135025 [2021-06-05 21:19:45,706 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 398.1ms TimeCoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:19:45,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135025 states. [2021-06-05 21:19:48,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135025 to 134864. [2021-06-05 21:19:48,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134864 states, 134863 states have (on average 3.6919243973513862) internal successors, (497904), 134863 states have internal predecessors, (497904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:49,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134864 states to 134864 states and 497904 transitions. [2021-06-05 21:19:49,124 INFO L78 Accepts]: Start accepts. Automaton has 134864 states and 497904 transitions. Word has length 33 [2021-06-05 21:19:49,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:49,124 INFO L482 AbstractCegarLoop]: Abstraction has 134864 states and 497904 transitions. [2021-06-05 21:19:49,124 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:49,124 INFO L276 IsEmpty]: Start isEmpty. Operand 134864 states and 497904 transitions. [2021-06-05 21:19:49,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 21:19:49,465 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:49,465 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:49,665 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable160 [2021-06-05 21:19:49,665 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:49,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:49,666 INFO L82 PathProgramCache]: Analyzing trace with hash -959028658, now seen corresponding path program 153 times [2021-06-05 21:19:49,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:49,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617622577] [2021-06-05 21:19:49,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:49,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:49,754 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:49,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:49,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617622577] [2021-06-05 21:19:49,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617622577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:49,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774651401] [2021-06-05 21:19:49,755 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:49,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:19:49,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:19:49,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:19:49,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:49,994 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:49,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774651401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:49,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:49,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 21:19:49,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103284569] [2021-06-05 21:19:49,995 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:19:49,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:49,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:19:49,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:19:49,995 INFO L87 Difference]: Start difference. First operand 134864 states and 497904 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:51,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:51,598 INFO L93 Difference]: Finished difference Result 135170 states and 498704 transitions. [2021-06-05 21:19:51,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:19:51,604 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 21:19:51,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:52,012 INFO L225 Difference]: With dead ends: 135170 [2021-06-05 21:19:52,013 INFO L226 Difference]: Without dead ends: 135028 [2021-06-05 21:19:52,013 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 347.8ms TimeCoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:19:52,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135028 states. [2021-06-05 21:19:54,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135028 to 134868. [2021-06-05 21:19:54,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134868 states, 134867 states have (on average 3.691903875670105) internal successors, (497916), 134867 states have internal predecessors, (497916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:54,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134868 states to 134868 states and 497916 transitions. [2021-06-05 21:19:54,713 INFO L78 Accepts]: Start accepts. Automaton has 134868 states and 497916 transitions. Word has length 33 [2021-06-05 21:19:54,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:54,713 INFO L482 AbstractCegarLoop]: Abstraction has 134868 states and 497916 transitions. [2021-06-05 21:19:54,713 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:54,713 INFO L276 IsEmpty]: Start isEmpty. Operand 134868 states and 497916 transitions. [2021-06-05 21:19:55,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 21:19:55,489 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:55,490 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:55,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:55,705 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:55,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:55,705 INFO L82 PathProgramCache]: Analyzing trace with hash 965014034, now seen corresponding path program 154 times [2021-06-05 21:19:55,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:55,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648339778] [2021-06-05 21:19:55,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:55,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:55,798 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:55,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:55,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648339778] [2021-06-05 21:19:55,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648339778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:55,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021548827] [2021-06-05 21:19:55,799 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:55,822 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:19:55,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:19:55,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:19:55,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:56,060 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:56,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021548827] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:56,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:56,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 21:19:56,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558170992] [2021-06-05 21:19:56,061 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:19:56,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:56,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:19:56,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:19:56,061 INFO L87 Difference]: Start difference. First operand 134868 states and 497916 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:57,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:57,094 INFO L93 Difference]: Finished difference Result 135436 states and 499523 transitions. [2021-06-05 21:19:57,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:19:57,095 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 21:19:57,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:58,012 INFO L225 Difference]: With dead ends: 135436 [2021-06-05 21:19:58,012 INFO L226 Difference]: Without dead ends: 135326 [2021-06-05 21:19:58,012 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 360.2ms TimeCoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:19:58,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135326 states. [2021-06-05 21:19:59,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135326 to 135008. [2021-06-05 21:20:00,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135008 states, 135007 states have (on average 3.6911123126948975) internal successors, (498326), 135007 states have internal predecessors, (498326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:00,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135008 states to 135008 states and 498326 transitions. [2021-06-05 21:20:00,915 INFO L78 Accepts]: Start accepts. Automaton has 135008 states and 498326 transitions. Word has length 33 [2021-06-05 21:20:00,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:20:00,915 INFO L482 AbstractCegarLoop]: Abstraction has 135008 states and 498326 transitions. [2021-06-05 21:20:00,915 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:00,915 INFO L276 IsEmpty]: Start isEmpty. Operand 135008 states and 498326 transitions. [2021-06-05 21:20:01,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 21:20:01,192 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:20:01,192 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:20:01,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:01,393 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:20:01,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:20:01,393 INFO L82 PathProgramCache]: Analyzing trace with hash -1017339178, now seen corresponding path program 155 times [2021-06-05 21:20:01,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:20:01,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928697465] [2021-06-05 21:20:01,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:20:01,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:01,479 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:01,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:20:01,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928697465] [2021-06-05 21:20:01,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928697465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:01,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010515986] [2021-06-05 21:20:01,479 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:01,504 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:20:01,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:20:01,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:20:01,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:20:01,722 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:01,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010515986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:01,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:20:01,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 21:20:01,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803132721] [2021-06-05 21:20:01,722 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:20:01,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:20:01,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:20:01,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:20:01,723 INFO L87 Difference]: Start difference. First operand 135008 states and 498326 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:03,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:20:03,272 INFO L93 Difference]: Finished difference Result 135409 states and 499417 transitions. [2021-06-05 21:20:03,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:20:03,272 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 21:20:03,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:20:03,677 INFO L225 Difference]: With dead ends: 135409 [2021-06-05 21:20:03,677 INFO L226 Difference]: Without dead ends: 135325 [2021-06-05 21:20:03,677 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 330.9ms TimeCoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:20:03,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135325 states. [2021-06-05 21:20:05,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135325 to 134976. [2021-06-05 21:20:06,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134976 states, 134975 states have (on average 3.6913057973698833) internal successors, (498234), 134975 states have internal predecessors, (498234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:06,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134976 states to 134976 states and 498234 transitions. [2021-06-05 21:20:06,607 INFO L78 Accepts]: Start accepts. Automaton has 134976 states and 498234 transitions. Word has length 33 [2021-06-05 21:20:06,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:20:06,607 INFO L482 AbstractCegarLoop]: Abstraction has 134976 states and 498234 transitions. [2021-06-05 21:20:06,607 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:06,607 INFO L276 IsEmpty]: Start isEmpty. Operand 134976 states and 498234 transitions. [2021-06-05 21:20:06,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 21:20:06,874 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:20:06,875 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:20:07,086 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:07,086 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:20:07,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:20:07,086 INFO L82 PathProgramCache]: Analyzing trace with hash -1160274146, now seen corresponding path program 156 times [2021-06-05 21:20:07,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:20:07,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749964845] [2021-06-05 21:20:07,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:20:07,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:07,189 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:07,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:20:07,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749964845] [2021-06-05 21:20:07,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749964845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:07,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541896877] [2021-06-05 21:20:07,190 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:07,215 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:20:07,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:20:07,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:20:07,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:20:07,497 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:07,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541896877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:07,497 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:20:07,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 21:20:07,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996529456] [2021-06-05 21:20:07,497 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:20:07,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:20:07,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:20:07,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=413, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:20:07,498 INFO L87 Difference]: Start difference. First operand 134976 states and 498234 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:09,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:20:09,130 INFO L93 Difference]: Finished difference Result 135181 states and 498843 transitions. [2021-06-05 21:20:09,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:20:09,131 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 21:20:09,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:20:09,546 INFO L225 Difference]: With dead ends: 135181 [2021-06-05 21:20:09,547 INFO L226 Difference]: Without dead ends: 135166 [2021-06-05 21:20:09,547 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 437.4ms TimeCoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:20:09,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135166 states. [2021-06-05 21:20:11,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135166 to 135012. [2021-06-05 21:20:12,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135012 states, 135011 states have (on average 3.6913362614898046) internal successors, (498371), 135011 states have internal predecessors, (498371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:12,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135012 states to 135012 states and 498371 transitions. [2021-06-05 21:20:12,946 INFO L78 Accepts]: Start accepts. Automaton has 135012 states and 498371 transitions. Word has length 33 [2021-06-05 21:20:12,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:20:12,946 INFO L482 AbstractCegarLoop]: Abstraction has 135012 states and 498371 transitions. [2021-06-05 21:20:12,947 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:12,947 INFO L276 IsEmpty]: Start isEmpty. Operand 135012 states and 498371 transitions. [2021-06-05 21:20:13,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 21:20:13,372 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:20:13,372 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:20:13,587 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable164 [2021-06-05 21:20:13,588 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:20:13,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:20:13,588 INFO L82 PathProgramCache]: Analyzing trace with hash 516165646, now seen corresponding path program 157 times [2021-06-05 21:20:13,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:20:13,588 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640789597] [2021-06-05 21:20:13,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:20:13,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:13,679 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:13,679 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:20:13,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640789597] [2021-06-05 21:20:13,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640789597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:13,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292269734] [2021-06-05 21:20:13,679 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 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:13,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:13,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:20:13,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:20:13,925 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:13,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292269734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:13,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:20:13,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 21:20:13,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896030107] [2021-06-05 21:20:13,925 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:20:13,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:20:13,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:20:13,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:20:13,926 INFO L87 Difference]: Start difference. First operand 135012 states and 498371 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:15,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:20:15,608 INFO L93 Difference]: Finished difference Result 135441 states and 499607 transitions. [2021-06-05 21:20:15,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:20:15,621 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 21:20:15,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:20:16,010 INFO L225 Difference]: With dead ends: 135441 [2021-06-05 21:20:16,010 INFO L226 Difference]: Without dead ends: 135329 [2021-06-05 21:20:16,010 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 358.2ms TimeCoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:20:16,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135329 states. [2021-06-05 21:20:18,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135329 to 135120. [2021-06-05 21:20:18,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135120 states, 135119 states have (on average 3.6909094945936545) internal successors, (498712), 135119 states have internal predecessors, (498712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:19,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135120 states to 135120 states and 498712 transitions. [2021-06-05 21:20:19,011 INFO L78 Accepts]: Start accepts. Automaton has 135120 states and 498712 transitions. Word has length 33 [2021-06-05 21:20:19,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:20:19,011 INFO L482 AbstractCegarLoop]: Abstraction has 135120 states and 498712 transitions. [2021-06-05 21:20:19,012 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:19,012 INFO L276 IsEmpty]: Start isEmpty. Operand 135120 states and 498712 transitions. [2021-06-05 21:20:19,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 21:20:19,278 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:20:19,279 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:20:19,479 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:19,479 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:20:19,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:20:19,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1371713326, now seen corresponding path program 158 times [2021-06-05 21:20:19,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:20:19,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666331314] [2021-06-05 21:20:19,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:20:19,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:19,569 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:19,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:20:19,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666331314] [2021-06-05 21:20:19,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666331314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:19,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166696304] [2021-06-05 21:20:19,570 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:19,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:20:19,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:20:19,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:20:19,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:20:19,823 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:19,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166696304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:19,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:20:19,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 21:20:19,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206559861] [2021-06-05 21:20:19,824 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:20:19,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:20:19,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:20:19,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=414, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:20:19,824 INFO L87 Difference]: Start difference. First operand 135120 states and 498712 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:21,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:20:21,362 INFO L93 Difference]: Finished difference Result 135711 states and 500369 transitions. [2021-06-05 21:20:21,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:20:21,362 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 21:20:21,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:20:21,778 INFO L225 Difference]: With dead ends: 135711 [2021-06-05 21:20:21,778 INFO L226 Difference]: Without dead ends: 135631 [2021-06-05 21:20:21,778 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 372.0ms TimeCoverageRelationStatistics Valid=74, Invalid=682, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:20:21,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135631 states. [2021-06-05 21:20:24,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135631 to 135275. [2021-06-05 21:20:24,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135275 states, 135274 states have (on average 3.690443100669752) internal successors, (499221), 135274 states have internal predecessors, (499221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:24,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135275 states to 135275 states and 499221 transitions. [2021-06-05 21:20:24,647 INFO L78 Accepts]: Start accepts. Automaton has 135275 states and 499221 transitions. Word has length 33 [2021-06-05 21:20:24,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:20:24,647 INFO L482 AbstractCegarLoop]: Abstraction has 135275 states and 499221 transitions. [2021-06-05 21:20:24,647 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:24,648 INFO L276 IsEmpty]: Start isEmpty. Operand 135275 states and 499221 transitions. [2021-06-05 21:20:25,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 21:20:25,420 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:20:25,420 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:20:25,635 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-06-05 21:20:25,636 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:20:25,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:20:25,636 INFO L82 PathProgramCache]: Analyzing trace with hash -1177029994, now seen corresponding path program 159 times [2021-06-05 21:20:25,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:20:25,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482908556] [2021-06-05 21:20:25,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:20:25,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:25,740 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:25,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:20:25,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482908556] [2021-06-05 21:20:25,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482908556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:25,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607746397] [2021-06-05 21:20:25,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:25,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 21:20:25,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:20:25,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:20:25,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:20:26,043 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:26,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607746397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:26,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:20:26,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 21:20:26,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339438137] [2021-06-05 21:20:26,044 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:20:26,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:20:26,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:20:26,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=414, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:20:26,044 INFO L87 Difference]: Start difference. First operand 135275 states and 499221 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:27,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:20:27,138 INFO L93 Difference]: Finished difference Result 135676 states and 500356 transitions. [2021-06-05 21:20:27,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:20:27,139 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 21:20:27,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:20:27,995 INFO L225 Difference]: With dead ends: 135676 [2021-06-05 21:20:27,995 INFO L226 Difference]: Without dead ends: 135646 [2021-06-05 21:20:27,995 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 400.4ms TimeCoverageRelationStatistics Valid=74, Invalid=682, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:20:28,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135646 states. [2021-06-05 21:20:29,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135646 to 135346. [2021-06-05 21:20:30,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135346 states, 135345 states have (on average 3.690509438841479) internal successors, (499492), 135345 states have internal predecessors, (499492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:30,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135346 states to 135346 states and 499492 transitions. [2021-06-05 21:20:30,974 INFO L78 Accepts]: Start accepts. Automaton has 135346 states and 499492 transitions. Word has length 33 [2021-06-05 21:20:30,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:20:30,974 INFO L482 AbstractCegarLoop]: Abstraction has 135346 states and 499492 transitions. [2021-06-05 21:20:30,974 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:30,974 INFO L276 IsEmpty]: Start isEmpty. Operand 135346 states and 499492 transitions. [2021-06-05 21:20:31,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 21:20:31,247 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:20:31,247 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:20:31,447 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:31,447 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:20:31,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:20:31,448 INFO L82 PathProgramCache]: Analyzing trace with hash -588948574, now seen corresponding path program 160 times [2021-06-05 21:20:31,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:20:31,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108297598] [2021-06-05 21:20:31,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:20:31,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:31,535 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:31,535 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:20:31,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108297598] [2021-06-05 21:20:31,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108297598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:31,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44103573] [2021-06-05 21:20:31,535 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:31,558 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:20:31,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:20:31,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:20:31,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:20:31,763 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:31,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44103573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:31,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:20:31,764 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 21:20:31,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727860042] [2021-06-05 21:20:31,764 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:20:31,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:20:31,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:20:31,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:20:31,764 INFO L87 Difference]: Start difference. First operand 135346 states and 499492 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:33,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:20:33,223 INFO L93 Difference]: Finished difference Result 136007 states and 501349 transitions. [2021-06-05 21:20:33,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:20:33,223 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 21:20:33,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:20:33,626 INFO L225 Difference]: With dead ends: 136007 [2021-06-05 21:20:33,626 INFO L226 Difference]: Without dead ends: 135825 [2021-06-05 21:20:33,626 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 318.6ms TimeCoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:20:33,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135825 states. [2021-06-05 21:20:35,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135825 to 135578. [2021-06-05 21:20:36,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135578 states, 135577 states have (on average 3.6892393252542837) internal successors, (500176), 135577 states have internal predecessors, (500176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:36,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135578 states to 135578 states and 500176 transitions. [2021-06-05 21:20:36,479 INFO L78 Accepts]: Start accepts. Automaton has 135578 states and 500176 transitions. Word has length 33 [2021-06-05 21:20:36,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:20:36,479 INFO L482 AbstractCegarLoop]: Abstraction has 135578 states and 500176 transitions. [2021-06-05 21:20:36,479 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:36,479 INFO L276 IsEmpty]: Start isEmpty. Operand 135578 states and 500176 transitions. [2021-06-05 21:20:36,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 21:20:36,741 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:20:36,741 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:20:36,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-06-05 21:20:36,941 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:20:36,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:20:36,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1267056682, now seen corresponding path program 161 times [2021-06-05 21:20:36,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:20:36,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858166436] [2021-06-05 21:20:36,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:20:36,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:37,032 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:37,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:20:37,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858166436] [2021-06-05 21:20:37,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858166436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:37,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932239418] [2021-06-05 21:20:37,032 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:37,058 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 21:20:37,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:20:37,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:20:37,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:20:37,304 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:37,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932239418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:37,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:20:37,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 21:20:37,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637740910] [2021-06-05 21:20:37,305 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:20:37,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:20:37,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:20:37,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=413, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:20:37,305 INFO L87 Difference]: Start difference. First operand 135578 states and 500176 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:38,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:20:38,917 INFO L93 Difference]: Finished difference Result 136135 states and 501711 transitions. [2021-06-05 21:20:38,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:20:38,917 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 21:20:38,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:20:39,325 INFO L225 Difference]: With dead ends: 136135 [2021-06-05 21:20:39,325 INFO L226 Difference]: Without dead ends: 136008 [2021-06-05 21:20:39,326 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 352.3ms TimeCoverageRelationStatistics Valid=71, Invalid=631, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:20:39,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136008 states. [2021-06-05 21:20:41,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136008 to 135568. [2021-06-05 21:20:41,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135568 states, 135567 states have (on average 3.6892237786481963) internal successors, (500137), 135567 states have internal predecessors, (500137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:42,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135568 states to 135568 states and 500137 transitions. [2021-06-05 21:20:42,354 INFO L78 Accepts]: Start accepts. Automaton has 135568 states and 500137 transitions. Word has length 33 [2021-06-05 21:20:42,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:20:42,354 INFO L482 AbstractCegarLoop]: Abstraction has 135568 states and 500137 transitions. [2021-06-05 21:20:42,354 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:42,354 INFO L276 IsEmpty]: Start isEmpty. Operand 135568 states and 500137 transitions. [2021-06-05 21:20:43,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 21:20:43,159 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:20:43,159 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:20:43,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-06-05 21:20:43,360 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:20:43,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:20:43,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1810631706, now seen corresponding path program 162 times [2021-06-05 21:20:43,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:20:43,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257847670] [2021-06-05 21:20:43,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:20:43,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:43,449 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:20:43,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:20:43,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257847670] [2021-06-05 21:20:43,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257847670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:43,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942780733] [2021-06-05 21:20:43,449 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:43,473 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 21:20:43,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:20:43,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:20:43,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:20:43,684 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:43,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942780733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:43,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:20:43,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-05 21:20:43,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555254937] [2021-06-05 21:20:43,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:20:43,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:20:43,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:20:43,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:20:43,685 INFO L87 Difference]: Start difference. First operand 135568 states and 500137 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:44,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:20:44,730 INFO L93 Difference]: Finished difference Result 135962 states and 501194 transitions. [2021-06-05 21:20:44,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:20:44,731 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 21:20:44,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:20:45,658 INFO L225 Difference]: With dead ends: 135962 [2021-06-05 21:20:45,658 INFO L226 Difference]: Without dead ends: 135878 [2021-06-05 21:20:45,658 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 323.4ms TimeCoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:20:45,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135878 states. [2021-06-05 21:20:47,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135878 to 135615. [2021-06-05 21:20:47,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135615 states, 135614 states have (on average 3.689235624640524) internal successors, (500312), 135614 states have internal predecessors, (500312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:48,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135615 states to 135615 states and 500312 transitions. [2021-06-05 21:20:48,771 INFO L78 Accepts]: Start accepts. Automaton has 135615 states and 500312 transitions. Word has length 33 [2021-06-05 21:20:48,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:20:48,772 INFO L482 AbstractCegarLoop]: Abstraction has 135615 states and 500312 transitions. [2021-06-05 21:20:48,772 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:48,772 INFO L276 IsEmpty]: Start isEmpty. Operand 135615 states and 500312 transitions. [2021-06-05 21:20:49,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 21:20:49,035 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:20:49,035 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:20:49,235 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:49,235 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:20:49,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:20:49,236 INFO L82 PathProgramCache]: Analyzing trace with hash 654578334, now seen corresponding path program 163 times [2021-06-05 21:20:49,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:20:49,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014798275] [2021-06-05 21:20:49,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:20:49,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:49,321 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:20:49,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:20:49,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014798275] [2021-06-05 21:20:49,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014798275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:49,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664463429] [2021-06-05 21:20:49,321 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 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:49,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:49,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:20:49,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:20:49,576 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:49,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664463429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:49,577 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:20:49,577 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-05 21:20:49,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463184720] [2021-06-05 21:20:49,577 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:20:49,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:20:49,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:20:49,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:20:49,577 INFO L87 Difference]: Start difference. First operand 135615 states and 500312 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:51,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:20:51,095 INFO L93 Difference]: Finished difference Result 136030 states and 501487 transitions. [2021-06-05 21:20:51,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:20:51,096 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 21:20:51,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:20:51,496 INFO L225 Difference]: With dead ends: 136030 [2021-06-05 21:20:51,496 INFO L226 Difference]: Without dead ends: 136000 [2021-06-05 21:20:51,497 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 324.0ms TimeCoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:20:51,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136000 states. [2021-06-05 21:20:53,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136000 to 135676. [2021-06-05 21:20:53,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135676 states, 135675 states have (on average 3.689272157729869) internal successors, (500542), 135675 states have internal predecessors, (500542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:54,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135676 states to 135676 states and 500542 transitions. [2021-06-05 21:20:54,270 INFO L78 Accepts]: Start accepts. Automaton has 135676 states and 500542 transitions. Word has length 33 [2021-06-05 21:20:54,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:20:54,270 INFO L482 AbstractCegarLoop]: Abstraction has 135676 states and 500542 transitions. [2021-06-05 21:20:54,270 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:54,270 INFO L276 IsEmpty]: Start isEmpty. Operand 135676 states and 500542 transitions. [2021-06-05 21:20:54,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 21:20:54,537 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:20:54,537 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:20:54,737 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:54,737 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:20:54,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:20:54,738 INFO L82 PathProgramCache]: Analyzing trace with hash 1745873050, now seen corresponding path program 164 times [2021-06-05 21:20:54,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:20:54,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908860435] [2021-06-05 21:20:54,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:20:54,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:55,307 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:55,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:20:55,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908860435] [2021-06-05 21:20:55,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908860435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:55,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414414760] [2021-06-05 21:20:55,308 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:55,406 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:20:55,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:20:55,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:20:55,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:20:55,626 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:55,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414414760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:55,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:20:55,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 21:20:55,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038153483] [2021-06-05 21:20:55,626 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:20:55,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:20:55,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:20:55,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:20:55,627 INFO L87 Difference]: Start difference. First operand 135676 states and 500542 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:56,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:20:56,600 INFO L93 Difference]: Finished difference Result 135970 states and 501235 transitions. [2021-06-05 21:20:56,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:20:56,600 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 21:20:56,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:20:56,978 INFO L225 Difference]: With dead ends: 135970 [2021-06-05 21:20:56,978 INFO L226 Difference]: Without dead ends: 135812 [2021-06-05 21:20:56,979 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 758.2ms TimeCoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:20:57,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135812 states. [2021-06-05 21:20:59,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135812 to 135650. [2021-06-05 21:20:59,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135650 states, 135649 states have (on average 3.6883869398226303) internal successors, (500326), 135649 states have internal predecessors, (500326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:00,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135650 states to 135650 states and 500326 transitions. [2021-06-05 21:21:00,285 INFO L78 Accepts]: Start accepts. Automaton has 135650 states and 500326 transitions. Word has length 33 [2021-06-05 21:21:00,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:21:00,285 INFO L482 AbstractCegarLoop]: Abstraction has 135650 states and 500326 transitions. [2021-06-05 21:21:00,285 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:00,286 INFO L276 IsEmpty]: Start isEmpty. Operand 135650 states and 500326 transitions. [2021-06-05 21:21:00,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 21:21:00,562 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:21:00,562 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:21:00,762 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2021-06-05 21:21:00,762 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:21:00,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:21:00,762 INFO L82 PathProgramCache]: Analyzing trace with hash 1141614370, now seen corresponding path program 165 times [2021-06-05 21:21:00,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:21:00,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907729103] [2021-06-05 21:21:00,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:21:00,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:21:00,844 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:00,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:21:00,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907729103] [2021-06-05 21:21:00,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907729103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:00,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175362165] [2021-06-05 21:21:00,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:00,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:21:00,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:21:00,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:21:00,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:21:01,078 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:01,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175362165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:01,078 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:21:01,078 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 21:21:01,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457982012] [2021-06-05 21:21:01,078 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:21:01,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:21:01,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:21:01,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:21:01,078 INFO L87 Difference]: Start difference. First operand 135650 states and 500326 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:02,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:21:02,532 INFO L93 Difference]: Finished difference Result 136261 states and 501957 transitions. [2021-06-05 21:21:02,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:21:02,533 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 21:21:02,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:21:02,895 INFO L225 Difference]: With dead ends: 136261 [2021-06-05 21:21:02,895 INFO L226 Difference]: Without dead ends: 136063 [2021-06-05 21:21:02,895 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 286.6ms TimeCoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:21:03,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136063 states. [2021-06-05 21:21:05,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136063 to 135852. [2021-06-05 21:21:05,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135852 states, 135851 states have (on average 3.6868628129347596) internal successors, (500864), 135851 states have internal predecessors, (500864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:05,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135852 states to 135852 states and 500864 transitions. [2021-06-05 21:21:05,696 INFO L78 Accepts]: Start accepts. Automaton has 135852 states and 500864 transitions. Word has length 33 [2021-06-05 21:21:05,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:21:05,696 INFO L482 AbstractCegarLoop]: Abstraction has 135852 states and 500864 transitions. [2021-06-05 21:21:05,696 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:05,696 INFO L276 IsEmpty]: Start isEmpty. Operand 135852 states and 500864 transitions. [2021-06-05 21:21:05,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 21:21:05,948 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:21:05,948 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:21:06,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:06,149 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:21:06,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:21:06,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1527145246, now seen corresponding path program 166 times [2021-06-05 21:21:06,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:21:06,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026621402] [2021-06-05 21:21:06,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:21:06,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:21:06,223 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:06,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:21:06,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026621402] [2021-06-05 21:21:06,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026621402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:06,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827179508] [2021-06-05 21:21:06,223 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:06,246 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:21:06,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:21:06,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:21:06,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:21:06,455 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:06,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827179508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:06,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:21:06,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-05 21:21:06,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284402819] [2021-06-05 21:21:06,456 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:21:06,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:21:06,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:21:06,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:21:06,456 INFO L87 Difference]: Start difference. First operand 135852 states and 500864 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:07,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:21:07,793 INFO L93 Difference]: Finished difference Result 136405 states and 502442 transitions. [2021-06-05 21:21:07,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:21:07,794 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 21:21:07,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:21:08,199 INFO L225 Difference]: With dead ends: 136405 [2021-06-05 21:21:08,199 INFO L226 Difference]: Without dead ends: 136263 [2021-06-05 21:21:08,199 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 268.9ms TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:21:08,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136263 states. [2021-06-05 21:21:10,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136263 to 136063. [2021-06-05 21:21:10,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136063 states, 136062 states have (on average 3.6861283826490863) internal successors, (501542), 136062 states have internal predecessors, (501542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:11,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136063 states to 136063 states and 501542 transitions. [2021-06-05 21:21:11,156 INFO L78 Accepts]: Start accepts. Automaton has 136063 states and 501542 transitions. Word has length 33 [2021-06-05 21:21:11,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:21:11,157 INFO L482 AbstractCegarLoop]: Abstraction has 136063 states and 501542 transitions. [2021-06-05 21:21:11,157 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:11,157 INFO L276 IsEmpty]: Start isEmpty. Operand 136063 states and 501542 transitions. [2021-06-05 21:21:11,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 21:21:11,958 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:21:11,958 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:21:12,171 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:12,172 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:21:12,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:21:12,172 INFO L82 PathProgramCache]: Analyzing trace with hash 966556586, now seen corresponding path program 167 times [2021-06-05 21:21:12,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:21:12,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024755443] [2021-06-05 21:21:12,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:21:12,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:21:12,246 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:12,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:21:12,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024755443] [2021-06-05 21:21:12,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024755443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:12,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705635100] [2021-06-05 21:21:12,246 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:12,270 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 21:21:12,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:21:12,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:21:12,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:21:12,478 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:12,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705635100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:12,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:21:12,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-05 21:21:12,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084788416] [2021-06-05 21:21:12,479 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:21:12,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:21:12,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:21:12,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:21:12,479 INFO L87 Difference]: Start difference. First operand 136063 states and 501542 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:13,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:21:13,341 INFO L93 Difference]: Finished difference Result 136463 states and 502600 transitions. [2021-06-05 21:21:13,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:21:13,342 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 21:21:13,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:21:13,744 INFO L225 Difference]: With dead ends: 136463 [2021-06-05 21:21:13,744 INFO L226 Difference]: Without dead ends: 136357 [2021-06-05 21:21:13,744 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 271.7ms TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:21:14,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136357 states. [2021-06-05 21:21:16,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136357 to 136175. [2021-06-05 21:21:16,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136175 states, 136174 states have (on average 3.6854759352005524) internal successors, (501866), 136174 states have internal predecessors, (501866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:17,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136175 states to 136175 states and 501866 transitions. [2021-06-05 21:21:17,213 INFO L78 Accepts]: Start accepts. Automaton has 136175 states and 501866 transitions. Word has length 33 [2021-06-05 21:21:17,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:21:17,213 INFO L482 AbstractCegarLoop]: Abstraction has 136175 states and 501866 transitions. [2021-06-05 21:21:17,214 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:17,214 INFO L276 IsEmpty]: Start isEmpty. Operand 136175 states and 501866 transitions. [2021-06-05 21:21:17,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 21:21:17,485 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:21:17,485 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:21:17,686 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:17,686 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:21:17,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:21:17,686 INFO L82 PathProgramCache]: Analyzing trace with hash 1161239918, now seen corresponding path program 168 times [2021-06-05 21:21:17,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:21:17,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995267005] [2021-06-05 21:21:17,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:21:17,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:21:17,771 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:17,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:21:17,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995267005] [2021-06-05 21:21:17,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995267005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:17,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387304822] [2021-06-05 21:21:17,772 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:17,795 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 21:21:17,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:21:17,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:21:17,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:21:18,011 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:18,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387304822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:18,011 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:21:18,011 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 21:21:18,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908954185] [2021-06-05 21:21:18,011 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:21:18,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:21:18,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:21:18,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:21:18,011 INFO L87 Difference]: Start difference. First operand 136175 states and 501866 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:19,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:21:19,596 INFO L93 Difference]: Finished difference Result 136837 states and 503693 transitions. [2021-06-05 21:21:19,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:21:19,597 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 21:21:19,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:21:20,024 INFO L225 Difference]: With dead ends: 136837 [2021-06-05 21:21:20,024 INFO L226 Difference]: Without dead ends: 136710 [2021-06-05 21:21:20,024 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 298.1ms TimeCoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:21:20,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136710 states. [2021-06-05 21:21:22,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136710 to 136135. [2021-06-05 21:21:22,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136135 states, 136134 states have (on average 3.686360497744869) internal successors, (501839), 136134 states have internal predecessors, (501839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:22,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136135 states to 136135 states and 501839 transitions. [2021-06-05 21:21:22,913 INFO L78 Accepts]: Start accepts. Automaton has 136135 states and 501839 transitions. Word has length 33 [2021-06-05 21:21:22,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:21:22,913 INFO L482 AbstractCegarLoop]: Abstraction has 136135 states and 501839 transitions. [2021-06-05 21:21:22,913 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:22,913 INFO L276 IsEmpty]: Start isEmpty. Operand 136135 states and 501839 transitions. [2021-06-05 21:21:23,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 21:21:23,182 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:21:23,182 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:21:23,382 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable176 [2021-06-05 21:21:23,382 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:21:23,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:21:23,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1704814942, now seen corresponding path program 169 times [2021-06-05 21:21:23,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:21:23,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115920708] [2021-06-05 21:21:23,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:21:23,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:21:23,460 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:21:23,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:21:23,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115920708] [2021-06-05 21:21:23,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115920708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:23,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987447886] [2021-06-05 21:21:23,460 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:23,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:21:23,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:21:23,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:21:23,691 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:23,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987447886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:23,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:21:23,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-05 21:21:23,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788401342] [2021-06-05 21:21:23,691 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:21:23,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:21:23,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:21:23,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:21:23,692 INFO L87 Difference]: Start difference. First operand 136135 states and 501839 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:25,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:21:25,127 INFO L93 Difference]: Finished difference Result 136552 states and 502951 transitions. [2021-06-05 21:21:25,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:21:25,128 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 21:21:25,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:21:25,554 INFO L225 Difference]: With dead ends: 136552 [2021-06-05 21:21:25,554 INFO L226 Difference]: Without dead ends: 136408 [2021-06-05 21:21:25,554 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 294.5ms TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:21:25,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136408 states. [2021-06-05 21:21:28,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136408 to 136224. [2021-06-05 21:21:28,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136224 states, 136223 states have (on average 3.6858460025105892) internal successors, (502097), 136223 states have internal predecessors, (502097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:29,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136224 states to 136224 states and 502097 transitions. [2021-06-05 21:21:29,141 INFO L78 Accepts]: Start accepts. Automaton has 136224 states and 502097 transitions. Word has length 33 [2021-06-05 21:21:29,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:21:29,142 INFO L482 AbstractCegarLoop]: Abstraction has 136224 states and 502097 transitions. [2021-06-05 21:21:29,142 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:29,142 INFO L276 IsEmpty]: Start isEmpty. Operand 136224 states and 502097 transitions. [2021-06-05 21:21:29,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 21:21:29,473 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:21:29,473 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:21:29,673 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:29,673 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:21:29,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:21:29,674 INFO L82 PathProgramCache]: Analyzing trace with hash 548761570, now seen corresponding path program 170 times [2021-06-05 21:21:29,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:21:29,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018376068] [2021-06-05 21:21:29,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:21:29,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:21:29,751 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:21:29,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:21:29,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018376068] [2021-06-05 21:21:29,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018376068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:29,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71369229] [2021-06-05 21:21:29,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:29,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:21:29,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:21:29,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:21:29,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:21:29,975 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:29,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71369229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:29,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:21:29,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-05 21:21:29,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402807084] [2021-06-05 21:21:29,976 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:21:29,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:21:29,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:21:29,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:21:29,976 INFO L87 Difference]: Start difference. First operand 136224 states and 502097 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:31,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:21:31,009 INFO L93 Difference]: Finished difference Result 136817 states and 503721 transitions. [2021-06-05 21:21:31,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:21:31,010 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 21:21:31,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:21:31,980 INFO L225 Difference]: With dead ends: 136817 [2021-06-05 21:21:31,980 INFO L226 Difference]: Without dead ends: 136702 [2021-06-05 21:21:31,980 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 272.9ms TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:21:32,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136702 states. [2021-06-05 21:21:33,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136702 to 136321. [2021-06-05 21:21:34,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136321 states, 136320 states have (on average 3.68581279342723) internal successors, (502450), 136320 states have internal predecessors, (502450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:34,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136321 states to 136321 states and 502450 transitions. [2021-06-05 21:21:34,958 INFO L78 Accepts]: Start accepts. Automaton has 136321 states and 502450 transitions. Word has length 33 [2021-06-05 21:21:34,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:21:34,958 INFO L482 AbstractCegarLoop]: Abstraction has 136321 states and 502450 transitions. [2021-06-05 21:21:34,959 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:34,959 INFO L276 IsEmpty]: Start isEmpty. Operand 136321 states and 502450 transitions. [2021-06-05 21:21:35,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 21:21:35,211 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:21:35,211 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:21:35,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-06-05 21:21:35,412 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:21:35,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:21:35,412 INFO L82 PathProgramCache]: Analyzing trace with hash 308801818, now seen corresponding path program 171 times [2021-06-05 21:21:35,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:21:35,412 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408143521] [2021-06-05 21:21:35,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:21:35,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:21:35,495 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:35,495 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:21:35,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408143521] [2021-06-05 21:21:35,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408143521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:35,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516967634] [2021-06-05 21:21:35,496 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:35,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:21:35,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:21:35,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:21:35,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:21:35,734 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:35,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516967634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:35,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:21:35,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-05 21:21:35,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396334073] [2021-06-05 21:21:35,735 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:21:35,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:21:35,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:21:35,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:21:35,735 INFO L87 Difference]: Start difference. First operand 136321 states and 502450 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:37,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:21:37,136 INFO L93 Difference]: Finished difference Result 136671 states and 503372 transitions. [2021-06-05 21:21:37,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:21:37,137 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 21:21:37,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:21:37,544 INFO L225 Difference]: With dead ends: 136671 [2021-06-05 21:21:37,544 INFO L226 Difference]: Without dead ends: 136497 [2021-06-05 21:21:37,544 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 277.3ms TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:21:37,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136497 states. [2021-06-05 21:21:39,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136497 to 136433. [2021-06-05 21:21:40,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136433 states, 136432 states have (on average 3.6851911574997067) internal successors, (502778), 136432 states have internal predecessors, (502778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:40,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136433 states to 136433 states and 502778 transitions. [2021-06-05 21:21:40,509 INFO L78 Accepts]: Start accepts. Automaton has 136433 states and 502778 transitions. Word has length 33 [2021-06-05 21:21:40,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:21:40,509 INFO L482 AbstractCegarLoop]: Abstraction has 136433 states and 502778 transitions. [2021-06-05 21:21:40,509 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:40,509 INFO L276 IsEmpty]: Start isEmpty. Operand 136433 states and 502778 transitions. [2021-06-05 21:21:40,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 21:21:40,774 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:21:40,774 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:21:40,989 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-06-05 21:21:40,989 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:21:40,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:21:40,989 INFO L82 PathProgramCache]: Analyzing trace with hash -1656613022, now seen corresponding path program 172 times [2021-06-05 21:21:40,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:21:40,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295966585] [2021-06-05 21:21:40,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:21:40,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:21:41,067 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:41,067 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:21:41,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295966585] [2021-06-05 21:21:41,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295966585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:41,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775587773] [2021-06-05 21:21:41,068 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:41,092 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:21:41,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:21:41,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:21:41,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:21:41,822 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:41,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775587773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:41,822 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:21:41,822 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-05 21:21:41,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808915721] [2021-06-05 21:21:41,822 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:21:41,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:21:41,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:21:41,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:21:41,823 INFO L87 Difference]: Start difference. First operand 136433 states and 502778 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:42,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:21:42,815 INFO L93 Difference]: Finished difference Result 136787 states and 503684 transitions. [2021-06-05 21:21:42,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:21:42,815 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 21:21:42,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:21:43,199 INFO L225 Difference]: With dead ends: 136787 [2021-06-05 21:21:43,199 INFO L226 Difference]: Without dead ends: 136633 [2021-06-05 21:21:43,199 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 771.2ms TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:21:43,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136633 states. [2021-06-05 21:21:45,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136633 to 136417. [2021-06-05 21:21:45,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136417 states, 136416 states have (on average 3.6851322425521933) internal successors, (502711), 136416 states have internal predecessors, (502711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:46,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136417 states to 136417 states and 502711 transitions. [2021-06-05 21:21:46,593 INFO L78 Accepts]: Start accepts. Automaton has 136417 states and 502711 transitions. Word has length 33 [2021-06-05 21:21:46,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:21:46,594 INFO L482 AbstractCegarLoop]: Abstraction has 136417 states and 502711 transitions. [2021-06-05 21:21:46,594 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:46,594 INFO L276 IsEmpty]: Start isEmpty. Operand 136417 states and 502711 transitions. [2021-06-05 21:21:46,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 21:21:46,869 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:21:46,869 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:21:47,070 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:47,070 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:21:47,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:21:47,070 INFO L82 PathProgramCache]: Analyzing trace with hash -1189214166, now seen corresponding path program 173 times [2021-06-05 21:21:47,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:21:47,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619906269] [2021-06-05 21:21:47,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:21:47,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:21:47,148 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:47,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:21:47,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619906269] [2021-06-05 21:21:47,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619906269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:47,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921523350] [2021-06-05 21:21:47,148 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:47,173 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 21:21:47,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:21:47,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:21:47,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:21:47,375 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:47,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921523350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:47,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:21:47,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-05 21:21:47,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405357939] [2021-06-05 21:21:47,375 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:21:47,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:21:47,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:21:47,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:21:47,376 INFO L87 Difference]: Start difference. First operand 136417 states and 502711 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:48,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:21:48,921 INFO L93 Difference]: Finished difference Result 137004 states and 504307 transitions. [2021-06-05 21:21:48,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:21:48,921 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 21:21:48,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:21:49,319 INFO L225 Difference]: With dead ends: 137004 [2021-06-05 21:21:49,319 INFO L226 Difference]: Without dead ends: 136877 [2021-06-05 21:21:49,319 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 281.9ms TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:21:49,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136877 states. [2021-06-05 21:21:51,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136877 to 136498. [2021-06-05 21:21:51,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136498 states, 136497 states have (on average 3.6851652417269243) internal successors, (503014), 136497 states have internal predecessors, (503014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:52,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136498 states to 136498 states and 503014 transitions. [2021-06-05 21:21:52,249 INFO L78 Accepts]: Start accepts. Automaton has 136498 states and 503014 transitions. Word has length 33 [2021-06-05 21:21:52,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:21:52,250 INFO L482 AbstractCegarLoop]: Abstraction has 136498 states and 503014 transitions. [2021-06-05 21:21:52,250 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:52,250 INFO L276 IsEmpty]: Start isEmpty. Operand 136498 states and 503014 transitions. [2021-06-05 21:21:52,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 21:21:52,511 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:21:52,511 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:21:52,711 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable181 [2021-06-05 21:21:52,712 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:21:52,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:21:52,712 INFO L82 PathProgramCache]: Analyzing trace with hash -323997470, now seen corresponding path program 174 times [2021-06-05 21:21:52,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:21:52,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432759081] [2021-06-05 21:21:52,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:21:52,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:21:52,790 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:21:52,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:21:52,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432759081] [2021-06-05 21:21:52,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432759081] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:52,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37669211] [2021-06-05 21:21:52,790 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:52,816 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 21:21:52,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:21:52,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:21:52,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:21:53,022 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:53,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37669211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:53,022 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:21:53,022 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-05 21:21:53,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060350240] [2021-06-05 21:21:53,023 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:21:53,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:21:53,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:21:53,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:21:53,023 INFO L87 Difference]: Start difference. First operand 136498 states and 503014 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:54,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:21:54,433 INFO L93 Difference]: Finished difference Result 137151 states and 504800 transitions. [2021-06-05 21:21:54,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:21:54,433 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 21:21:54,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:21:54,832 INFO L225 Difference]: With dead ends: 137151 [2021-06-05 21:21:54,832 INFO L226 Difference]: Without dead ends: 137008 [2021-06-05 21:21:54,833 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 278.9ms TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:21:54,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137008 states. [2021-06-05 21:21:57,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137008 to 136605. [2021-06-05 21:21:57,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136605 states, 136604 states have (on average 3.685111709759597) internal successors, (503401), 136604 states have internal predecessors, (503401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:58,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136605 states to 136605 states and 503401 transitions. [2021-06-05 21:21:58,262 INFO L78 Accepts]: Start accepts. Automaton has 136605 states and 503401 transitions. Word has length 33 [2021-06-05 21:21:58,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:21:58,262 INFO L482 AbstractCegarLoop]: Abstraction has 136605 states and 503401 transitions. [2021-06-05 21:21:58,262 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:58,262 INFO L276 IsEmpty]: Start isEmpty. Operand 136605 states and 503401 transitions. [2021-06-05 21:21:58,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 21:21:58,649 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:21:58,649 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:21:58,850 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:58,850 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:21:58,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:21:58,850 INFO L82 PathProgramCache]: Analyzing trace with hash 740825498, now seen corresponding path program 175 times [2021-06-05 21:21:58,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:21:58,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520988331] [2021-06-05 21:21:58,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:21:58,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:21:58,928 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:58,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:21:58,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520988331] [2021-06-05 21:21:58,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520988331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:58,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479052254] [2021-06-05 21:21:58,928 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:58,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:21:58,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:21:58,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:21:59,154 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:59,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479052254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:59,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:21:59,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-05 21:21:59,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600664650] [2021-06-05 21:21:59,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:21:59,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:21:59,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:21:59,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:21:59,155 INFO L87 Difference]: Start difference. First operand 136605 states and 503401 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:00,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:00,292 INFO L93 Difference]: Finished difference Result 137345 states and 505531 transitions. [2021-06-05 21:22:00,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:22:00,293 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 21:22:00,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:01,235 INFO L225 Difference]: With dead ends: 137345 [2021-06-05 21:22:01,235 INFO L226 Difference]: Without dead ends: 137202 [2021-06-05 21:22:01,235 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 279.7ms TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:22:01,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137202 states. [2021-06-05 21:22:03,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137202 to 136759. [2021-06-05 21:22:03,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136759 states, 136758 states have (on average 3.6850348791295575) internal successors, (503958), 136758 states have internal predecessors, (503958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:04,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136759 states to 136759 states and 503958 transitions. [2021-06-05 21:22:04,166 INFO L78 Accepts]: Start accepts. Automaton has 136759 states and 503958 transitions. Word has length 33 [2021-06-05 21:22:04,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:04,166 INFO L482 AbstractCegarLoop]: Abstraction has 136759 states and 503958 transitions. [2021-06-05 21:22:04,166 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:04,166 INFO L276 IsEmpty]: Start isEmpty. Operand 136759 states and 503958 transitions. [2021-06-05 21:22:04,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 21:22:04,423 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:04,423 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:04,623 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable183 [2021-06-05 21:22:04,623 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:04,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:04,624 INFO L82 PathProgramCache]: Analyzing trace with hash -2124902626, now seen corresponding path program 176 times [2021-06-05 21:22:04,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:04,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136322779] [2021-06-05 21:22:04,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:04,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:04,701 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:04,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:04,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136322779] [2021-06-05 21:22:04,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136322779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:04,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186041680] [2021-06-05 21:22:04,701 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 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:04,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:22:04,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:22:04,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:22:04,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:04,939 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:04,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186041680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:04,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:04,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-05 21:22:04,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797593758] [2021-06-05 21:22:04,939 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:22:04,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:04,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:22:04,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:22:04,940 INFO L87 Difference]: Start difference. First operand 136759 states and 503958 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:06,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:06,358 INFO L93 Difference]: Finished difference Result 137461 states and 505914 transitions. [2021-06-05 21:22:06,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:22:06,359 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 21:22:06,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:06,775 INFO L225 Difference]: With dead ends: 137461 [2021-06-05 21:22:06,775 INFO L226 Difference]: Without dead ends: 137356 [2021-06-05 21:22:06,775 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 266.4ms TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:22:06,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137356 states. [2021-06-05 21:22:09,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137356 to 136882. [2021-06-05 21:22:09,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136882 states, 136881 states have (on average 3.685040290471285) internal successors, (504412), 136881 states have internal predecessors, (504412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:09,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136882 states to 136882 states and 504412 transitions. [2021-06-05 21:22:09,746 INFO L78 Accepts]: Start accepts. Automaton has 136882 states and 504412 transitions. Word has length 33 [2021-06-05 21:22:09,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:09,746 INFO L482 AbstractCegarLoop]: Abstraction has 136882 states and 504412 transitions. [2021-06-05 21:22:09,746 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:09,746 INFO L276 IsEmpty]: Start isEmpty. Operand 136882 states and 504412 transitions. [2021-06-05 21:22:09,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 21:22:09,998 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:09,998 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:10,198 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:10,198 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:10,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:10,198 INFO L82 PathProgramCache]: Analyzing trace with hash 1248276962, now seen corresponding path program 177 times [2021-06-05 21:22:10,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:10,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716524751] [2021-06-05 21:22:10,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:10,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:10,839 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:10,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:10,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716524751] [2021-06-05 21:22:10,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716524751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:10,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539343713] [2021-06-05 21:22:10,839 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:10,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:22:10,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:22:10,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:22:10,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:11,120 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:11,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539343713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:11,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:11,121 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 21:22:11,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072084506] [2021-06-05 21:22:11,121 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:22:11,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:11,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:22:11,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:22:11,121 INFO L87 Difference]: Start difference. First operand 136882 states and 504412 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:12,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:12,148 INFO L93 Difference]: Finished difference Result 138201 states and 508135 transitions. [2021-06-05 21:22:12,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:22:12,149 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 21:22:12,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:12,552 INFO L225 Difference]: With dead ends: 138201 [2021-06-05 21:22:12,552 INFO L226 Difference]: Without dead ends: 138065 [2021-06-05 21:22:12,553 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 339.0ms TimeCoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:22:13,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138065 states. [2021-06-05 21:22:15,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138065 to 136923. [2021-06-05 21:22:15,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136923 states, 136922 states have (on average 3.6860110135697695) internal successors, (504696), 136922 states have internal predecessors, (504696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:16,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136923 states to 136923 states and 504696 transitions. [2021-06-05 21:22:16,324 INFO L78 Accepts]: Start accepts. Automaton has 136923 states and 504696 transitions. Word has length 33 [2021-06-05 21:22:16,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:16,324 INFO L482 AbstractCegarLoop]: Abstraction has 136923 states and 504696 transitions. [2021-06-05 21:22:16,324 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:16,324 INFO L276 IsEmpty]: Start isEmpty. Operand 136923 states and 504696 transitions. [2021-06-05 21:22:16,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 21:22:16,617 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:16,617 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:16,817 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:16,817 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:16,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:16,818 INFO L82 PathProgramCache]: Analyzing trace with hash -960276966, now seen corresponding path program 178 times [2021-06-05 21:22:16,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:16,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910450122] [2021-06-05 21:22:16,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:16,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:16,902 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:16,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:16,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910450122] [2021-06-05 21:22:16,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910450122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:16,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412310645] [2021-06-05 21:22:16,902 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:16,927 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:22:16,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:22:16,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:22:16,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:17,155 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:17,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412310645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:17,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:17,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 21:22:17,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417682224] [2021-06-05 21:22:17,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:22:17,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:17,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:22:17,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:22:17,156 INFO L87 Difference]: Start difference. First operand 136923 states and 504696 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:18,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:18,713 INFO L93 Difference]: Finished difference Result 137357 states and 505946 transitions. [2021-06-05 21:22:18,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:22:18,714 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 21:22:18,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:19,125 INFO L225 Difference]: With dead ends: 137357 [2021-06-05 21:22:19,125 INFO L226 Difference]: Without dead ends: 137275 [2021-06-05 21:22:19,126 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 289.9ms TimeCoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:22:19,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137275 states. [2021-06-05 21:22:21,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137275 to 136972. [2021-06-05 21:22:21,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136972 states, 136971 states have (on average 3.6859627220360514) internal successors, (504870), 136971 states have internal predecessors, (504870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:22,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136972 states to 136972 states and 504870 transitions. [2021-06-05 21:22:22,143 INFO L78 Accepts]: Start accepts. Automaton has 136972 states and 504870 transitions. Word has length 33 [2021-06-05 21:22:22,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:22,143 INFO L482 AbstractCegarLoop]: Abstraction has 136972 states and 504870 transitions. [2021-06-05 21:22:22,143 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:22,143 INFO L276 IsEmpty]: Start isEmpty. Operand 136972 states and 504870 transitions. [2021-06-05 21:22:22,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 21:22:22,418 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:22,418 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:22,618 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:22,618 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:22,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:22,618 INFO L82 PathProgramCache]: Analyzing trace with hash 963765726, now seen corresponding path program 179 times [2021-06-05 21:22:22,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:22,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001203547] [2021-06-05 21:22:22,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:22,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:22,703 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:22,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:22,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001203547] [2021-06-05 21:22:22,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001203547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:22,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9261371] [2021-06-05 21:22:22,703 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:22,728 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:22:22,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:22:22,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:22:22,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:22,943 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:22,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9261371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:22,943 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:22,943 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 21:22:22,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934285173] [2021-06-05 21:22:22,943 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:22:22,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:22,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:22:22,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:22:22,944 INFO L87 Difference]: Start difference. First operand 136972 states and 504870 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:24,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:24,327 INFO L93 Difference]: Finished difference Result 137654 states and 506819 transitions. [2021-06-05 21:22:24,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:22:24,327 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 21:22:24,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:24,743 INFO L225 Difference]: With dead ends: 137654 [2021-06-05 21:22:24,743 INFO L226 Difference]: Without dead ends: 137544 [2021-06-05 21:22:24,744 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 264.5ms TimeCoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:22:24,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137544 states. [2021-06-05 21:22:27,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137544 to 137016. [2021-06-05 21:22:27,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137016 states, 137015 states have (on average 3.6854650950625842) internal successors, (504964), 137015 states have internal predecessors, (504964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:27,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137016 states to 137016 states and 504964 transitions. [2021-06-05 21:22:27,776 INFO L78 Accepts]: Start accepts. Automaton has 137016 states and 504964 transitions. Word has length 33 [2021-06-05 21:22:27,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:27,776 INFO L482 AbstractCegarLoop]: Abstraction has 137016 states and 504964 transitions. [2021-06-05 21:22:27,776 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:27,776 INFO L276 IsEmpty]: Start isEmpty. Operand 137016 states and 504964 transitions. [2021-06-05 21:22:28,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 21:22:28,552 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:28,552 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:28,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:28,768 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:28,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:28,768 INFO L82 PathProgramCache]: Analyzing trace with hash -1018587486, now seen corresponding path program 180 times [2021-06-05 21:22:28,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:28,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698472958] [2021-06-05 21:22:28,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:28,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:28,855 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:28,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:28,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698472958] [2021-06-05 21:22:28,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698472958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:28,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985766420] [2021-06-05 21:22:28,856 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:28,882 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:22:28,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:22:28,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:22:28,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:29,100 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:29,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985766420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:29,100 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:29,100 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 21:22:29,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465063883] [2021-06-05 21:22:29,101 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:22:29,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:29,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:22:29,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:22:29,101 INFO L87 Difference]: Start difference. First operand 137016 states and 504964 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:30,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:30,017 INFO L93 Difference]: Finished difference Result 137774 states and 507159 transitions. [2021-06-05 21:22:30,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:22:30,017 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 21:22:30,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:30,962 INFO L225 Difference]: With dead ends: 137774 [2021-06-05 21:22:30,963 INFO L226 Difference]: Without dead ends: 137632 [2021-06-05 21:22:30,963 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 275.1ms TimeCoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:22:31,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137632 states. [2021-06-05 21:22:32,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137632 to 137314. [2021-06-05 21:22:33,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137314 states, 137313 states have (on average 3.6842760700006556) internal successors, (505899), 137313 states have internal predecessors, (505899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:33,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137314 states to 137314 states and 505899 transitions. [2021-06-05 21:22:33,972 INFO L78 Accepts]: Start accepts. Automaton has 137314 states and 505899 transitions. Word has length 33 [2021-06-05 21:22:33,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:33,972 INFO L482 AbstractCegarLoop]: Abstraction has 137314 states and 505899 transitions. [2021-06-05 21:22:33,972 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:33,972 INFO L276 IsEmpty]: Start isEmpty. Operand 137314 states and 505899 transitions. [2021-06-05 21:22:34,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 21:22:34,247 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:34,247 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:34,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2021-06-05 21:22:34,448 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:34,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:34,448 INFO L82 PathProgramCache]: Analyzing trace with hash 2060260002, now seen corresponding path program 181 times [2021-06-05 21:22:34,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:34,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438240500] [2021-06-05 21:22:34,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:34,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:34,536 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:34,537 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:34,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438240500] [2021-06-05 21:22:34,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438240500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:34,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622367089] [2021-06-05 21:22:34,537 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 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:34,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:34,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:22:34,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:34,783 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:34,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622367089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:34,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:34,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 21:22:34,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331326754] [2021-06-05 21:22:34,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:22:34,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:34,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:22:34,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:22:34,784 INFO L87 Difference]: Start difference. First operand 137314 states and 505899 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:36,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:36,255 INFO L93 Difference]: Finished difference Result 138356 states and 508861 transitions. [2021-06-05 21:22:36,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:22:36,256 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 21:22:36,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:36,660 INFO L225 Difference]: With dead ends: 138356 [2021-06-05 21:22:36,660 INFO L226 Difference]: Without dead ends: 138306 [2021-06-05 21:22:36,660 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 284.1ms TimeCoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:22:36,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138306 states. [2021-06-05 21:22:39,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138306 to 137637. [2021-06-05 21:22:39,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137637 states, 137636 states have (on average 3.6833241303147433) internal successors, (506958), 137636 states have internal predecessors, (506958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:39,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137637 states to 137637 states and 506958 transitions. [2021-06-05 21:22:39,709 INFO L78 Accepts]: Start accepts. Automaton has 137637 states and 506958 transitions. Word has length 33 [2021-06-05 21:22:39,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:39,709 INFO L482 AbstractCegarLoop]: Abstraction has 137637 states and 506958 transitions. [2021-06-05 21:22:39,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:39,709 INFO L276 IsEmpty]: Start isEmpty. Operand 137637 states and 506958 transitions. [2021-06-05 21:22:40,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 21:22:40,458 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:40,458 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:40,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-06-05 21:22:40,677 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:40,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:40,677 INFO L82 PathProgramCache]: Analyzing trace with hash -138504034, now seen corresponding path program 182 times [2021-06-05 21:22:40,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:40,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093810931] [2021-06-05 21:22:40,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:40,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:40,759 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:40,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:40,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093810931] [2021-06-05 21:22:40,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093810931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:40,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225342385] [2021-06-05 21:22:40,759 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:40,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:22:40,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:22:40,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:22:40,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:41,039 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:41,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225342385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:41,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:41,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 21:22:41,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999697230] [2021-06-05 21:22:41,039 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:22:41,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:41,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:22:41,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:22:41,040 INFO L87 Difference]: Start difference. First operand 137637 states and 506958 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:42,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:42,009 INFO L93 Difference]: Finished difference Result 138581 states and 509568 transitions. [2021-06-05 21:22:42,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:22:42,010 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 21:22:42,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:42,848 INFO L225 Difference]: With dead ends: 138581 [2021-06-05 21:22:42,848 INFO L226 Difference]: Without dead ends: 138407 [2021-06-05 21:22:42,849 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 271.8ms TimeCoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:22:42,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138407 states. [2021-06-05 21:22:44,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138407 to 138053. [2021-06-05 21:22:44,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138053 states, 138052 states have (on average 3.681779329528004) internal successors, (508277), 138052 states have internal predecessors, (508277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:46,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138053 states to 138053 states and 508277 transitions. [2021-06-05 21:22:46,026 INFO L78 Accepts]: Start accepts. Automaton has 138053 states and 508277 transitions. Word has length 33 [2021-06-05 21:22:46,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:46,026 INFO L482 AbstractCegarLoop]: Abstraction has 138053 states and 508277 transitions. [2021-06-05 21:22:46,026 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:46,026 INFO L276 IsEmpty]: Start isEmpty. Operand 138053 states and 508277 transitions. [2021-06-05 21:22:46,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 21:22:46,294 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:46,295 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:46,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2021-06-05 21:22:46,496 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:46,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:46,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1821858026, now seen corresponding path program 183 times [2021-06-05 21:22:46,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:46,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180330467] [2021-06-05 21:22:46,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:46,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:46,576 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:46,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:46,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180330467] [2021-06-05 21:22:46,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180330467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:46,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798361434] [2021-06-05 21:22:46,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:46,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:22:46,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:22:46,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:22:46,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:46,848 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:46,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798361434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:46,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:46,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-05 21:22:46,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581041495] [2021-06-05 21:22:46,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:22:46,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:46,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:22:46,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:22:46,849 INFO L87 Difference]: Start difference. First operand 138053 states and 508277 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:48,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:48,841 INFO L93 Difference]: Finished difference Result 138483 states and 509458 transitions. [2021-06-05 21:22:48,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:22:48,842 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 21:22:48,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:49,343 INFO L225 Difference]: With dead ends: 138483 [2021-06-05 21:22:49,343 INFO L226 Difference]: Without dead ends: 138301 [2021-06-05 21:22:49,345 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 271.9ms TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:22:49,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138301 states. [2021-06-05 21:22:52,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138301 to 138093. [2021-06-05 21:22:52,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138093 states, 138092 states have (on average 3.6815239115951686) internal successors, (508389), 138092 states have internal predecessors, (508389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:52,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138093 states to 138093 states and 508389 transitions. [2021-06-05 21:22:52,951 INFO L78 Accepts]: Start accepts. Automaton has 138093 states and 508389 transitions. Word has length 33 [2021-06-05 21:22:52,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:52,951 INFO L482 AbstractCegarLoop]: Abstraction has 138093 states and 508389 transitions. [2021-06-05 21:22:52,951 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:52,951 INFO L276 IsEmpty]: Start isEmpty. Operand 138093 states and 508389 transitions. [2021-06-05 21:22:53,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 21:22:53,743 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:53,744 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:53,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:53,957 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:53,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:53,957 INFO L82 PathProgramCache]: Analyzing trace with hash -137840346, now seen corresponding path program 184 times [2021-06-05 21:22:53,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:53,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507856579] [2021-06-05 21:22:53,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:53,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:54,039 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:54,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:54,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507856579] [2021-06-05 21:22:54,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507856579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:54,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243409257] [2021-06-05 21:22:54,040 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:54,068 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:22:54,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:22:54,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:22:54,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:54,296 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:54,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243409257] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:54,296 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:54,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-05 21:22:54,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361256168] [2021-06-05 21:22:54,297 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:22:54,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:54,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:22:54,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:22:54,297 INFO L87 Difference]: Start difference. First operand 138093 states and 508389 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:55,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:55,201 INFO L93 Difference]: Finished difference Result 138781 states and 510361 transitions. [2021-06-05 21:22:55,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:22:55,202 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 21:22:55,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:55,635 INFO L225 Difference]: With dead ends: 138781 [2021-06-05 21:22:55,635 INFO L226 Difference]: Without dead ends: 138699 [2021-06-05 21:22:55,635 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 276.4ms TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:22:56,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138699 states. [2021-06-05 21:22:58,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138699 to 138281. [2021-06-05 21:22:58,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138281 states, 138280 states have (on average 3.6812481920740527) internal successors, (509043), 138280 states have internal predecessors, (509043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:59,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138281 states to 138281 states and 509043 transitions. [2021-06-05 21:22:59,177 INFO L78 Accepts]: Start accepts. Automaton has 138281 states and 509043 transitions. Word has length 33 [2021-06-05 21:22:59,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:59,177 INFO L482 AbstractCegarLoop]: Abstraction has 138281 states and 509043 transitions. [2021-06-05 21:22:59,177 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:59,177 INFO L276 IsEmpty]: Start isEmpty. Operand 138281 states and 509043 transitions. [2021-06-05 21:22:59,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 21:22:59,468 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:59,469 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:59,669 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:59,669 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:59,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:59,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1939105810, now seen corresponding path program 185 times [2021-06-05 21:22:59,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:59,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481346141] [2021-06-05 21:22:59,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:59,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:59,743 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:59,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:59,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481346141] [2021-06-05 21:22:59,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481346141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:59,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862389713] [2021-06-05 21:22:59,744 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:59,769 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 21:22:59,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:22:59,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:22:59,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:23:00,003 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:23:00,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862389713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:23:00,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:23:00,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-05 21:23:00,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294480703] [2021-06-05 21:23:00,003 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:23:00,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:23:00,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:23:00,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:23:00,004 INFO L87 Difference]: Start difference. First operand 138281 states and 509043 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:23:01,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:23:01,722 INFO L93 Difference]: Finished difference Result 138841 states and 510581 transitions. [2021-06-05 21:23:01,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:23:01,723 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 21:23:01,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:23:02,313 INFO L225 Difference]: With dead ends: 138841 [2021-06-05 21:23:02,313 INFO L226 Difference]: Without dead ends: 138765 [2021-06-05 21:23:02,313 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 268.5ms TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:23:02,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138765 states. [2021-06-05 21:23:04,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138765 to 138390. [2021-06-05 21:23:04,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138390 states, 138389 states have (on average 3.6810729176451886) internal successors, (509420), 138389 states have internal predecessors, (509420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:23:05,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138390 states to 138390 states and 509420 transitions. [2021-06-05 21:23:05,283 INFO L78 Accepts]: Start accepts. Automaton has 138390 states and 509420 transitions. Word has length 33 [2021-06-05 21:23:05,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:23:05,283 INFO L482 AbstractCegarLoop]: Abstraction has 138390 states and 509420 transitions. [2021-06-05 21:23:05,283 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:23:05,283 INFO L276 IsEmpty]: Start isEmpty. Operand 138390 states and 509420 transitions. [2021-06-05 21:23:05,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 21:23:05,567 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:23:05,567 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:23:05,767 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable193 [2021-06-05 21:23:05,767 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:23:05,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:23:05,768 INFO L82 PathProgramCache]: Analyzing trace with hash -1744422478, now seen corresponding path program 186 times [2021-06-05 21:23:05,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:23:05,768 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528601396] [2021-06-05 21:23:05,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:23:05,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:23:05,853 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:23:05,853 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:23:05,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528601396] [2021-06-05 21:23:05,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528601396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:23:05,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222416789] [2021-06-05 21:23:05,854 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:23:05,883 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 21:23:05,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:23:05,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:23:05,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:23:06,087 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:23:06,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222416789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:23:06,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:23:06,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 21:23:06,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319905152] [2021-06-05 21:23:06,087 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:23:06,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:23:06,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:23:06,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:23:06,088 INFO L87 Difference]: Start difference. First operand 138390 states and 509420 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:23:07,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:23:07,626 INFO L93 Difference]: Finished difference Result 139561 states and 512775 transitions. [2021-06-05 21:23:07,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:23:07,627 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 21:23:07,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:23:08,075 INFO L225 Difference]: With dead ends: 139561 [2021-06-05 21:23:08,075 INFO L226 Difference]: Without dead ends: 139512 [2021-06-05 21:23:08,075 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 276.1ms TimeCoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:23:08,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139512 states. [2021-06-05 21:23:10,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139512 to 138609. [2021-06-05 21:23:10,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138609 states, 138608 states have (on average 3.681490245873254) internal successors, (510284), 138608 states have internal predecessors, (510284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:23:11,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138609 states to 138609 states and 510284 transitions. [2021-06-05 21:23:11,683 INFO L78 Accepts]: Start accepts. Automaton has 138609 states and 510284 transitions. Word has length 33 [2021-06-05 21:23:11,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:23:11,683 INFO L482 AbstractCegarLoop]: Abstraction has 138609 states and 510284 transitions. [2021-06-05 21:23:11,683 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:23:11,683 INFO L276 IsEmpty]: Start isEmpty. Operand 138609 states and 510284 transitions. [2021-06-05 21:23:12,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 21:23:12,020 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:23:12,020 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:23:12,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:23:12,220 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:23:12,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:23:12,221 INFO L82 PathProgramCache]: Analyzing trace with hash -1200847454, now seen corresponding path program 187 times [2021-06-05 21:23:12,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:23:12,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798595008] [2021-06-05 21:23:12,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:23:12,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:23:12,302 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:23:12,302 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:23:12,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798595008] [2021-06-05 21:23:12,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798595008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:23:12,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028498626] [2021-06-05 21:23:12,302 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 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:23:12,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:23:12,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:23:12,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:23:12,542 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:23:12,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028498626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:23:12,542 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:23:12,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-05 21:23:12,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082851987] [2021-06-05 21:23:12,542 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:23:12,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:23:12,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:23:12,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:23:12,543 INFO L87 Difference]: Start difference. First operand 138609 states and 510284 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:23:14,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:23:14,128 INFO L93 Difference]: Finished difference Result 139165 states and 511834 transitions. [2021-06-05 21:23:14,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:23:14,128 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 21:23:14,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:23:14,504 INFO L225 Difference]: With dead ends: 139165 [2021-06-05 21:23:14,504 INFO L226 Difference]: Without dead ends: 139021 [2021-06-05 21:23:14,504 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 264.4ms TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:23:14,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139021 states. [2021-06-05 21:23:16,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139021 to 138669. [2021-06-05 21:23:17,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138669 states, 138668 states have (on average 3.6814261401332677) internal successors, (510496), 138668 states have internal predecessors, (510496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:23:17,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138669 states to 138669 states and 510496 transitions. [2021-06-05 21:23:17,576 INFO L78 Accepts]: Start accepts. Automaton has 138669 states and 510496 transitions. Word has length 33 [2021-06-05 21:23:17,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:23:17,576 INFO L482 AbstractCegarLoop]: Abstraction has 138669 states and 510496 transitions. [2021-06-05 21:23:17,576 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:23:17,576 INFO L276 IsEmpty]: Start isEmpty. Operand 138669 states and 510496 transitions. [2021-06-05 21:23:17,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 21:23:17,849 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:23:17,849 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:23:18,049 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,190 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:23:18,050 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:23:18,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:23:18,050 INFO L82 PathProgramCache]: Analyzing trace with hash 1938066470, now seen corresponding path program 188 times [2021-06-05 21:23:18,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:23:18,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719374226] [2021-06-05 21:23:18,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:23:18,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:23:18,131 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:23:18,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:23:18,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719374226] [2021-06-05 21:23:18,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719374226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:23:18,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839964440] [2021-06-05 21:23:18,131 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:23:18,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:23:18,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:23:18,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:23:18,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:23:18,355 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:23:18,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839964440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:23:18,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:23:18,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-05 21:23:18,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276103380] [2021-06-05 21:23:18,355 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:23:18,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:23:18,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:23:18,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:23:18,356 INFO L87 Difference]: Start difference. First operand 138669 states and 510496 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:23:19,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:23:19,737 INFO L93 Difference]: Finished difference Result 139131 states and 511744 transitions. [2021-06-05 21:23:19,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:23:19,737 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 21:23:19,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:23:20,158 INFO L225 Difference]: With dead ends: 139131 [2021-06-05 21:23:20,158 INFO L226 Difference]: Without dead ends: 139071 [2021-06-05 21:23:20,159 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 255.1ms TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:23:20,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139071 states. [2021-06-05 21:23:22,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139071 to 138677. [2021-06-05 21:23:22,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138677 states, 138676 states have (on average 3.681415673945023) internal successors, (510524), 138676 states have internal predecessors, (510524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:23:23,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138677 states to 138677 states and 510524 transitions. [2021-06-05 21:23:23,210 INFO L78 Accepts]: Start accepts. Automaton has 138677 states and 510524 transitions. Word has length 33 [2021-06-05 21:23:23,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:23:23,211 INFO L482 AbstractCegarLoop]: Abstraction has 138677 states and 510524 transitions. [2021-06-05 21:23:23,211 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:23:23,211 INFO L276 IsEmpty]: Start isEmpty. Operand 138677 states and 510524 transitions. [2021-06-05 21:23:24,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 21:23:24,068 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:23:24,068 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:23:24,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:23:24,281 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:23:24,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:23:24,281 INFO L82 PathProgramCache]: Analyzing trace with hash -267308122, now seen corresponding path program 189 times [2021-06-05 21:23:24,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:23:24,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782853143] [2021-06-05 21:23:24,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:23:24,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:23:24,360 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:23:24,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:23:24,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782853143] [2021-06-05 21:23:24,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782853143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:23:24,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133985618] [2021-06-05 21:23:24,360 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:23:24,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:23:24,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:23:24,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:23:24,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:23:24,611 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:23:24,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133985618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:23:24,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:23:24,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-05 21:23:24,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376167346] [2021-06-05 21:23:24,611 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:23:24,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:23:24,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:23:24,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:23:24,612 INFO L87 Difference]: Start difference. First operand 138677 states and 510524 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:23:25,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:23:25,538 INFO L93 Difference]: Finished difference Result 139123 states and 511717 transitions. [2021-06-05 21:23:25,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:23:25,538 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 21:23:25,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:23:26,512 INFO L225 Difference]: With dead ends: 139123 [2021-06-05 21:23:26,512 INFO L226 Difference]: Without dead ends: 138985 [2021-06-05 21:23:26,513 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 263.5ms TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:23:26,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138985 states. [2021-06-05 21:23:28,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138985 to 138765. [2021-06-05 21:23:28,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138765 states, 138764 states have (on average 3.68086103023839) internal successors, (510771), 138764 states have internal predecessors, (510771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:23:29,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138765 states to 138765 states and 510771 transitions. [2021-06-05 21:23:29,809 INFO L78 Accepts]: Start accepts. Automaton has 138765 states and 510771 transitions. Word has length 33 [2021-06-05 21:23:29,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:23:29,809 INFO L482 AbstractCegarLoop]: Abstraction has 138765 states and 510771 transitions. [2021-06-05 21:23:29,809 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:23:29,809 INFO L276 IsEmpty]: Start isEmpty. Operand 138765 states and 510771 transitions. [2021-06-05 21:23:30,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 21:23:30,106 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:23:30,106 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:23:30,306 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:23:30,307 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:23:30,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:23:30,307 INFO L82 PathProgramCache]: Analyzing trace with hash 200090734, now seen corresponding path program 190 times [2021-06-05 21:23:30,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:23:30,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498533864] [2021-06-05 21:23:30,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:23:30,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:23:30,388 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:23:30,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:23:30,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498533864] [2021-06-05 21:23:30,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498533864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:23:30,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033603777] [2021-06-05 21:23:30,388 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:23:30,418 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:23:30,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:23:30,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:23:30,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:23:30,639 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:23:30,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033603777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:23:30,639 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:23:30,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-05 21:23:30,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098545421] [2021-06-05 21:23:30,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:23:30,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:23:30,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:23:30,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:23:30,640 INFO L87 Difference]: Start difference. First operand 138765 states and 510771 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:23:32,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:23:32,148 INFO L93 Difference]: Finished difference Result 139574 states and 513100 transitions. [2021-06-05 21:23:32,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:23:32,149 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 21:23:32,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:23:32,558 INFO L225 Difference]: With dead ends: 139574 [2021-06-05 21:23:32,559 INFO L226 Difference]: Without dead ends: 139455 [2021-06-05 21:23:32,559 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 286.5ms TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:23:32,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139455 states. [2021-06-05 21:23:34,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139455 to 139022. [2021-06-05 21:23:35,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139022 states, 139021 states have (on average 3.680530279598046) internal successors, (511671), 139021 states have internal predecessors, (511671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:23:35,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139022 states to 139022 states and 511671 transitions. [2021-06-05 21:23:35,640 INFO L78 Accepts]: Start accepts. Automaton has 139022 states and 511671 transitions. Word has length 33 [2021-06-05 21:23:35,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:23:35,640 INFO L482 AbstractCegarLoop]: Abstraction has 139022 states and 511671 transitions. [2021-06-05 21:23:35,640 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:23:35,640 INFO L276 IsEmpty]: Start isEmpty. Operand 139022 states and 511671 transitions. [2021-06-05 21:23:36,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 21:23:36,470 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:23:36,470 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:23:36,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:23:36,701 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:23:36,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:23:36,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1065307430, now seen corresponding path program 191 times [2021-06-05 21:23:36,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:23:36,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090970621] [2021-06-05 21:23:36,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:23:36,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:23:36,785 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:23:36,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:23:36,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090970621] [2021-06-05 21:23:36,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090970621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:23:36,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508044718] [2021-06-05 21:23:36,785 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:23:36,811 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 21:23:36,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:23:36,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:23:36,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:23:37,021 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:23:37,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508044718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:23:37,021 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:23:37,021 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-05 21:23:37,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780916519] [2021-06-05 21:23:37,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:23:37,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:23:37,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:23:37,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:23:37,022 INFO L87 Difference]: Start difference. First operand 139022 states and 511671 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:23:37,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:23:37,926 INFO L93 Difference]: Finished difference Result 139748 states and 513678 transitions. [2021-06-05 21:23:37,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:23:37,927 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 21:23:37,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:23:38,368 INFO L225 Difference]: With dead ends: 139748 [2021-06-05 21:23:38,368 INFO L226 Difference]: Without dead ends: 139613 [2021-06-05 21:23:38,368 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 267.8ms TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:23:38,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139613 states. [2021-06-05 21:23:40,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139613 to 139152. [2021-06-05 21:23:41,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139152 states, 139151 states have (on average 3.6803544351100603) internal successors, (512125), 139151 states have internal predecessors, (512125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:23:42,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139152 states to 139152 states and 512125 transitions. [2021-06-05 21:23:42,037 INFO L78 Accepts]: Start accepts. Automaton has 139152 states and 512125 transitions. Word has length 33 [2021-06-05 21:23:42,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:23:42,037 INFO L482 AbstractCegarLoop]: Abstraction has 139152 states and 512125 transitions. [2021-06-05 21:23:42,037 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:23:42,037 INFO L276 IsEmpty]: Start isEmpty. Operand 139152 states and 512125 transitions. [2021-06-05 21:23:42,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 21:23:42,313 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:23:42,313 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:23:42,514 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-06-05 21:23:42,514 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:23:42,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:23:42,514 INFO L82 PathProgramCache]: Analyzing trace with hash 2130130398, now seen corresponding path program 192 times [2021-06-05 21:23:42,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:23:42,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99607996] [2021-06-05 21:23:42,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:23:42,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:23:42,591 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:23:42,591 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:23:42,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99607996] [2021-06-05 21:23:42,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99607996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:23:42,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401469923] [2021-06-05 21:23:42,592 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:23:42,616 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:23:42,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:23:42,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:23:42,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:23:42,814 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:23:42,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401469923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:23:42,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:23:42,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-05 21:23:42,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857874391] [2021-06-05 21:23:42,815 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:23:42,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:23:42,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:23:42,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:23:42,815 INFO L87 Difference]: Start difference. First operand 139152 states and 512125 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:23:44,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:23:44,382 INFO L93 Difference]: Finished difference Result 139830 states and 514036 transitions. [2021-06-05 21:23:44,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:23:44,383 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 21:23:44,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:23:44,810 INFO L225 Difference]: With dead ends: 139830 [2021-06-05 21:23:44,810 INFO L226 Difference]: Without dead ends: 139671 [2021-06-05 21:23:44,810 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 255.9ms TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:23:44,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139671 states. [2021-06-05 21:23:47,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139671 to 139307. [2021-06-05 21:23:47,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139307 states, 139306 states have (on average 3.6801071023502216) internal successors, (512661), 139306 states have internal predecessors, (512661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:23:47,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139307 states to 139307 states and 512661 transitions. [2021-06-05 21:23:47,817 INFO L78 Accepts]: Start accepts. Automaton has 139307 states and 512661 transitions. Word has length 33 [2021-06-05 21:23:47,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:23:47,817 INFO L482 AbstractCegarLoop]: Abstraction has 139307 states and 512661 transitions. [2021-06-05 21:23:47,817 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:23:47,817 INFO L276 IsEmpty]: Start isEmpty. Operand 139307 states and 512661 transitions. [2021-06-05 21:23:48,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 21:23:48,600 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:23:48,600 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:23:48,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2021-06-05 21:23:48,809 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:23:48,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:23:48,809 INFO L82 PathProgramCache]: Analyzing trace with hash -735597726, now seen corresponding path program 193 times [2021-06-05 21:23:48,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:23:48,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144269361] [2021-06-05 21:23:48,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:23:48,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:23:48,882 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:23:48,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:23:48,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144269361] [2021-06-05 21:23:48,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144269361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:23:48,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186098541] [2021-06-05 21:23:48,883 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 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:23:48,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:23:48,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:23:48,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:23:49,116 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:23:49,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186098541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:23:49,116 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:23:49,116 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-05 21:23:49,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949050968] [2021-06-05 21:23:49,117 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:23:49,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:23:49,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:23:49,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:23:49,117 INFO L87 Difference]: Start difference. First operand 139307 states and 512661 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:23:50,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:23:50,413 INFO L93 Difference]: Finished difference Result 139982 states and 514553 transitions. [2021-06-05 21:23:50,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:23:50,414 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 21:23:50,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:23:50,890 INFO L225 Difference]: With dead ends: 139982 [2021-06-05 21:23:50,890 INFO L226 Difference]: Without dead ends: 139865 [2021-06-05 21:23:50,890 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 269.0ms TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:23:51,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139865 states. [2021-06-05 21:23:53,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139865 to 139533. [2021-06-05 21:23:53,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139533 states, 139532 states have (on average 3.679306539001806) internal successors, (513381), 139532 states have internal predecessors, (513381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:23:53,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139533 states to 139533 states and 513381 transitions. [2021-06-05 21:23:53,844 INFO L78 Accepts]: Start accepts. Automaton has 139533 states and 513381 transitions. Word has length 33 [2021-06-05 21:23:53,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:23:53,844 INFO L482 AbstractCegarLoop]: Abstraction has 139533 states and 513381 transitions. [2021-06-05 21:23:53,844 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:23:53,844 INFO L276 IsEmpty]: Start isEmpty. Operand 139533 states and 513381 transitions. [2021-06-05 21:23:54,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 21:23:54,117 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:23:54,117 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:23:54,317 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-06-05 21:23:54,318 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:23:54,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:23:54,318 INFO L82 PathProgramCache]: Analyzing trace with hash -1657385434, now seen corresponding path program 194 times [2021-06-05 21:23:54,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:23:54,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028561673] [2021-06-05 21:23:54,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:23:54,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:23:54,411 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:23:54,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:23:54,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028561673] [2021-06-05 21:23:54,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028561673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:23:54,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171120410] [2021-06-05 21:23:54,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:23:54,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:23:54,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:23:54,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:23:54,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:23:55,179 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:23:55,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171120410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:23:55,180 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:23:55,180 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 21:23:55,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992535462] [2021-06-05 21:23:55,180 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:23:55,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:23:55,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:23:55,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:23:55,180 INFO L87 Difference]: Start difference. First operand 139533 states and 513381 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:23:56,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:23:56,130 INFO L93 Difference]: Finished difference Result 141165 states and 518167 transitions. [2021-06-05 21:23:56,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:23:56,130 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 21:23:56,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:23:56,570 INFO L225 Difference]: With dead ends: 141165 [2021-06-05 21:23:56,570 INFO L226 Difference]: Without dead ends: 141103 [2021-06-05 21:23:56,570 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 321.4ms TimeCoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:23:57,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141103 states. [2021-06-05 21:23:59,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141103 to 139884. [2021-06-05 21:23:59,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139884 states, 139883 states have (on average 3.679267673698734) internal successors, (514667), 139883 states have internal predecessors, (514667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:00,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139884 states to 139884 states and 514667 transitions. [2021-06-05 21:24:00,193 INFO L78 Accepts]: Start accepts. Automaton has 139884 states and 514667 transitions. Word has length 33 [2021-06-05 21:24:00,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:24:00,193 INFO L482 AbstractCegarLoop]: Abstraction has 139884 states and 514667 transitions. [2021-06-05 21:24:00,193 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:00,193 INFO L276 IsEmpty]: Start isEmpty. Operand 139884 states and 514667 transitions. [2021-06-05 21:24:00,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 21:24:00,487 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:24:00,487 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:24:00,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-06-05 21:24:00,688 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:24:00,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:24:00,688 INFO L82 PathProgramCache]: Analyzing trace with hash -1417347430, now seen corresponding path program 195 times [2021-06-05 21:24:00,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:24:00,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784455689] [2021-06-05 21:24:00,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:24:00,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:24:00,762 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:24:00,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:24:00,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784455689] [2021-06-05 21:24:00,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784455689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:00,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096037689] [2021-06-05 21:24:00,763 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:24:00,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:24:00,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:24:00,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:24:00,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:24:00,993 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:24:00,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096037689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:00,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:24:00,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-05 21:24:00,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032470200] [2021-06-05 21:24:00,994 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:24:00,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:24:00,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:24:00,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:24:00,994 INFO L87 Difference]: Start difference. First operand 139884 states and 514667 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:02,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:24:02,429 INFO L93 Difference]: Finished difference Result 140326 states and 515929 transitions. [2021-06-05 21:24:02,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:24:02,429 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 21:24:02,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:24:02,860 INFO L225 Difference]: With dead ends: 140326 [2021-06-05 21:24:02,861 INFO L226 Difference]: Without dead ends: 140276 [2021-06-05 21:24:02,861 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 251.4ms TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:24:03,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140276 states. [2021-06-05 21:24:05,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140276 to 139952. [2021-06-05 21:24:05,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139952 states, 139951 states have (on average 3.678951918885896) internal successors, (514873), 139951 states have internal predecessors, (514873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:05,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139952 states to 139952 states and 514873 transitions. [2021-06-05 21:24:05,897 INFO L78 Accepts]: Start accepts. Automaton has 139952 states and 514873 transitions. Word has length 33 [2021-06-05 21:24:05,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:24:05,897 INFO L482 AbstractCegarLoop]: Abstraction has 139952 states and 514873 transitions. [2021-06-05 21:24:05,897 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:05,897 INFO L276 IsEmpty]: Start isEmpty. Operand 139952 states and 514873 transitions. [2021-06-05 21:24:06,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 21:24:06,694 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:24:06,694 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:24:06,909 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2021-06-05 21:24:06,909 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:24:06,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:24:06,909 INFO L82 PathProgramCache]: Analyzing trace with hash 895266654, now seen corresponding path program 196 times [2021-06-05 21:24:06,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:24:06,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904873987] [2021-06-05 21:24:06,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:24:06,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:24:06,988 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:24:06,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:24:06,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904873987] [2021-06-05 21:24:06,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904873987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:06,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476997745] [2021-06-05 21:24:06,989 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:24:07,013 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:24:07,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:24:07,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:24:07,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:24:07,208 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:24:07,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476997745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:07,208 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:24:07,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-05 21:24:07,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781430474] [2021-06-05 21:24:07,208 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:24:07,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:24:07,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:24:07,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:24:07,209 INFO L87 Difference]: Start difference. First operand 139952 states and 514873 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:08,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:24:08,176 INFO L93 Difference]: Finished difference Result 140618 states and 516769 transitions. [2021-06-05 21:24:08,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:24:08,176 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 21:24:08,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:24:08,579 INFO L225 Difference]: With dead ends: 140618 [2021-06-05 21:24:08,579 INFO L226 Difference]: Without dead ends: 140564 [2021-06-05 21:24:08,579 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 253.7ms TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:24:09,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140564 states. [2021-06-05 21:24:11,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140564 to 140192. [2021-06-05 21:24:11,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140192 states, 140191 states have (on average 3.678417302109265) internal successors, (515681), 140191 states have internal predecessors, (515681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:12,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140192 states to 140192 states and 515681 transitions. [2021-06-05 21:24:12,041 INFO L78 Accepts]: Start accepts. Automaton has 140192 states and 515681 transitions. Word has length 33 [2021-06-05 21:24:12,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:24:12,041 INFO L482 AbstractCegarLoop]: Abstraction has 140192 states and 515681 transitions. [2021-06-05 21:24:12,041 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:12,041 INFO L276 IsEmpty]: Start isEmpty. Operand 140192 states and 515681 transitions. [2021-06-05 21:24:12,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 21:24:12,318 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:24:12,318 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:24:12,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:24:12,519 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:24:12,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:24:12,519 INFO L82 PathProgramCache]: Analyzing trace with hash 1622610462, now seen corresponding path program 197 times [2021-06-05 21:24:12,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:24:12,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264020760] [2021-06-05 21:24:12,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:24:12,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:24:12,608 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:24:12,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:24:12,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264020760] [2021-06-05 21:24:12,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264020760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:12,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405168981] [2021-06-05 21:24:12,609 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:24:12,633 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:24:12,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:24:12,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:24:12,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:24:12,837 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:24:12,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405168981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:12,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:24:12,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-05 21:24:12,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413509136] [2021-06-05 21:24:12,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:24:12,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:24:12,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:24:12,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:24:12,838 INFO L87 Difference]: Start difference. First operand 140192 states and 515681 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:14,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:24:14,245 INFO L93 Difference]: Finished difference Result 140843 states and 517403 transitions. [2021-06-05 21:24:14,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:24:14,246 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 21:24:14,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:24:14,673 INFO L225 Difference]: With dead ends: 140843 [2021-06-05 21:24:14,673 INFO L226 Difference]: Without dead ends: 140669 [2021-06-05 21:24:14,674 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 251.5ms TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:24:14,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140669 states. [2021-06-05 21:24:16,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140669 to 140316. [2021-06-05 21:24:17,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140316 states, 140315 states have (on average 3.677710864839825) internal successors, (516038), 140315 states have internal predecessors, (516038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:17,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140316 states to 140316 states and 516038 transitions. [2021-06-05 21:24:17,590 INFO L78 Accepts]: Start accepts. Automaton has 140316 states and 516038 transitions. Word has length 33 [2021-06-05 21:24:17,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:24:17,590 INFO L482 AbstractCegarLoop]: Abstraction has 140316 states and 516038 transitions. [2021-06-05 21:24:17,590 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:17,590 INFO L276 IsEmpty]: Start isEmpty. Operand 140316 states and 516038 transitions. [2021-06-05 21:24:17,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 21:24:17,864 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:24:17,864 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Forcibly destroying the process [2021-06-05 21:24:18,379 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2021-06-05 21:24:18,379 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:24:18,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:24:18,379 INFO L82 PathProgramCache]: Analyzing trace with hash -1470122842, now seen corresponding path program 198 times [2021-06-05 21:24:18,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:24:18,379 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207716320] [2021-06-05 21:24:18,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] The stream was forcibly closed: stdIn [2021-06-05 21:24:18,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:24:18,490 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:24:18,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:24:18,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207716320] [2021-06-05 21:24:18,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207716320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:18,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311180803] [2021-06-05 21:24:18,490 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:24:18,520 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:24:18,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:24:18,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:24:18,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:24:18,754 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:24:18,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311180803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:18,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:24:18,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-05 21:24:18,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965559631] [2021-06-05 21:24:18,755 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:24:18,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:24:18,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:24:18,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:24:18,755 INFO L87 Difference]: Start difference. First operand 140316 states and 516038 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:19,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:24:19,744 INFO L93 Difference]: Finished difference Result 140829 states and 517484 transitions. [2021-06-05 21:24:19,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:24:19,744 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 21:24:19,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:24:20,151 INFO L225 Difference]: With dead ends: 140829 [2021-06-05 21:24:20,152 INFO L226 Difference]: Without dead ends: 140771 [2021-06-05 21:24:20,152 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 299.4ms TimeCoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:24:20,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140771 states. [2021-06-05 21:24:22,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140771 to 140394. [2021-06-05 21:24:22,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140394 states, 140393 states have (on average 3.6776477459702406) internal successors, (516316), 140393 states have internal predecessors, (516316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:23,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140394 states to 140394 states and 516316 transitions. [2021-06-05 21:24:23,575 INFO L78 Accepts]: Start accepts. Automaton has 140394 states and 516316 transitions. Word has length 33 [2021-06-05 21:24:23,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:24:23,575 INFO L482 AbstractCegarLoop]: Abstraction has 140394 states and 516316 transitions. [2021-06-05 21:24:23,575 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:23,575 INFO L276 IsEmpty]: Start isEmpty. Operand 140394 states and 516316 transitions. [2021-06-05 21:24:23,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 21:24:23,853 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:24:23,853 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:24:24,053 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2021-06-05 21:24:24,054 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:24:24,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:24:24,054 INFO L82 PathProgramCache]: Analyzing trace with hash -1002723986, now seen corresponding path program 199 times [2021-06-05 21:24:24,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:24:24,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645187310] [2021-06-05 21:24:24,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:24:24,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:24:24,134 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:24:24,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:24:24,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645187310] [2021-06-05 21:24:24,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645187310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:24,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394667989] [2021-06-05 21:24:24,134 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 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:24:24,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:24:24,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:24:24,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:24:24,365 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:24:24,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394667989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:24,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:24:24,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-05 21:24:24,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575758505] [2021-06-05 21:24:24,365 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:24:24,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:24:24,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:24:24,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:24:24,366 INFO L87 Difference]: Start difference. First operand 140394 states and 516316 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:25,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:24:25,925 INFO L93 Difference]: Finished difference Result 141007 states and 518078 transitions. [2021-06-05 21:24:25,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:24:25,925 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 21:24:25,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:24:26,337 INFO L225 Difference]: With dead ends: 141007 [2021-06-05 21:24:26,337 INFO L226 Difference]: Without dead ends: 140955 [2021-06-05 21:24:26,338 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 274.3ms TimeCoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:24:26,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140955 states. [2021-06-05 21:24:28,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140955 to 140436. [2021-06-05 21:24:28,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140436 states, 140435 states have (on average 3.677658703314701) internal successors, (516472), 140435 states have internal predecessors, (516472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:29,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140436 states to 140436 states and 516472 transitions. [2021-06-05 21:24:29,281 INFO L78 Accepts]: Start accepts. Automaton has 140436 states and 516472 transitions. Word has length 33 [2021-06-05 21:24:29,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:24:29,281 INFO L482 AbstractCegarLoop]: Abstraction has 140436 states and 516472 transitions. [2021-06-05 21:24:29,281 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:29,281 INFO L276 IsEmpty]: Start isEmpty. Operand 140436 states and 516472 transitions. [2021-06-05 21:24:30,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 21:24:30,069 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:24:30,069 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:24:30,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:24:30,285 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:24:30,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:24:30,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1018546082, now seen corresponding path program 200 times [2021-06-05 21:24:30,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:24:30,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683300084] [2021-06-05 21:24:30,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:24:30,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:24:30,355 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:24:30,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:24:30,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683300084] [2021-06-05 21:24:30,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683300084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:30,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983170536] [2021-06-05 21:24:30,355 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:24:30,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:24:30,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:24:30,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:24:30,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:24:30,577 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:24:30,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983170536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:30,577 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:24:30,577 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 19 [2021-06-05 21:24:30,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527424161] [2021-06-05 21:24:30,578 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 21:24:30,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:24:30,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 21:24:30,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:24:30,578 INFO L87 Difference]: Start difference. First operand 140436 states and 516472 transitions. Second operand has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:31,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:24:31,595 INFO L93 Difference]: Finished difference Result 140940 states and 517912 transitions. [2021-06-05 21:24:31,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:24:31,595 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 21:24:31,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:24:32,021 INFO L225 Difference]: With dead ends: 140940 [2021-06-05 21:24:32,021 INFO L226 Difference]: Without dead ends: 140791 [2021-06-05 21:24:32,021 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 247.6ms TimeCoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:24:32,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140791 states. [2021-06-05 21:24:34,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140791 to 140572. [2021-06-05 21:24:34,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140572 states, 140571 states have (on average 3.6772093817359197) internal successors, (516909), 140571 states have internal predecessors, (516909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:36,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140572 states to 140572 states and 516909 transitions. [2021-06-05 21:24:36,025 INFO L78 Accepts]: Start accepts. Automaton has 140572 states and 516909 transitions. Word has length 33 [2021-06-05 21:24:36,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:24:36,025 INFO L482 AbstractCegarLoop]: Abstraction has 140572 states and 516909 transitions. [2021-06-05 21:24:36,025 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:36,025 INFO L276 IsEmpty]: Start isEmpty. Operand 140572 states and 516909 transitions. [2021-06-05 21:24:36,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 21:24:36,353 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:24:36,354 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:24:36,569 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:24:36,569 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:24:36,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:24:36,570 INFO L82 PathProgramCache]: Analyzing trace with hash -137507290, now seen corresponding path program 201 times [2021-06-05 21:24:36,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:24:36,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816473120] [2021-06-05 21:24:36,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:24:36,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:24:36,646 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:24:36,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:24:36,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816473120] [2021-06-05 21:24:36,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816473120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:36,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6443246] [2021-06-05 21:24:36,646 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:24:36,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 21:24:36,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:24:36,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:24:36,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:24:36,919 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:24:36,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6443246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:36,919 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:24:36,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-05 21:24:36,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136248139] [2021-06-05 21:24:36,919 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:24:36,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:24:36,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:24:36,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:24:36,920 INFO L87 Difference]: Start difference. First operand 140572 states and 516909 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:38,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:24:38,558 INFO L93 Difference]: Finished difference Result 141721 states and 520339 transitions. [2021-06-05 21:24:38,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:24:38,559 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 21:24:38,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:24:38,959 INFO L225 Difference]: With dead ends: 141721 [2021-06-05 21:24:38,959 INFO L226 Difference]: Without dead ends: 141659 [2021-06-05 21:24:38,960 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 287.7ms TimeCoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:24:39,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141659 states. [2021-06-05 21:24:41,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141659 to 140853. [2021-06-05 21:24:41,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140853 states, 140852 states have (on average 3.6771717831482693) internal successors, (517937), 140852 states have internal predecessors, (517937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:42,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140853 states to 140853 states and 517937 transitions. [2021-06-05 21:24:42,001 INFO L78 Accepts]: Start accepts. Automaton has 140853 states and 517937 transitions. Word has length 33 [2021-06-05 21:24:42,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:24:42,001 INFO L482 AbstractCegarLoop]: Abstraction has 140853 states and 517937 transitions. [2021-06-05 21:24:42,001 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:42,001 INFO L276 IsEmpty]: Start isEmpty. Operand 140853 states and 517937 transitions. [2021-06-05 21:24:42,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 21:24:42,274 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:24:42,274 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:24:42,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:24:42,481 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:24:42,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:24:42,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1938412446, now seen corresponding path program 202 times [2021-06-05 21:24:42,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:24:42,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508144351] [2021-06-05 21:24:42,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:24:42,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:24:42,555 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:24:42,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:24:42,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508144351] [2021-06-05 21:24:42,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508144351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:42,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730501447] [2021-06-05 21:24:42,555 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:24:42,580 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:24:42,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:24:42,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:24:42,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:24:43,258 WARN L205 SmtUtils]: Spent 478.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-06-05 21:24:43,270 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:24:43,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730501447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:43,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:24:43,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-05 21:24:43,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496735371] [2021-06-05 21:24:43,270 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:24:43,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:24:43,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:24:43,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:24:43,271 INFO L87 Difference]: Start difference. First operand 140853 states and 517937 transitions. Second operand has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:44,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:24:44,235 INFO L93 Difference]: Finished difference Result 141638 states and 520235 transitions. [2021-06-05 21:24:44,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:24:44,235 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 21:24:44,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:24:44,641 INFO L225 Difference]: With dead ends: 141638 [2021-06-05 21:24:44,641 INFO L226 Difference]: Without dead ends: 141485 [2021-06-05 21:24:44,641 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 274.1ms TimeCoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:24:44,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141485 states. [2021-06-05 21:24:47,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141485 to 141159. [2021-06-05 21:24:47,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141159 states, 141158 states have (on average 3.6762422250244406) internal successors, (518931), 141158 states have internal predecessors, (518931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:48,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141159 states to 141159 states and 518931 transitions. [2021-06-05 21:24:48,283 INFO L78 Accepts]: Start accepts. Automaton has 141159 states and 518931 transitions. Word has length 33 [2021-06-05 21:24:48,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:24:48,283 INFO L482 AbstractCegarLoop]: Abstraction has 141159 states and 518931 transitions. [2021-06-05 21:24:48,283 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:48,283 INFO L276 IsEmpty]: Start isEmpty. Operand 141159 states and 518931 transitions. [2021-06-05 21:24:48,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 21:24:48,566 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:24:48,566 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:24:48,766 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable210,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:24:48,766 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:24:48,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:24:48,766 INFO L82 PathProgramCache]: Analyzing trace with hash 1434767142, now seen corresponding path program 203 times [2021-06-05 21:24:48,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:24:48,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766408817] [2021-06-05 21:24:48,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:24:48,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:24:48,852 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:24:48,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:24:48,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766408817] [2021-06-05 21:24:48,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766408817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:48,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947159965] [2021-06-05 21:24:48,852 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:24:48,877 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 21:24:48,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:24:48,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:24:48,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:24:49,092 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:24:49,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947159965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:49,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:24:49,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 21:24:49,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15626228] [2021-06-05 21:24:49,093 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:24:49,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:24:49,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:24:49,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:24:49,093 INFO L87 Difference]: Start difference. First operand 141159 states and 518931 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:50,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:24:50,701 INFO L93 Difference]: Finished difference Result 142967 states and 524363 transitions. [2021-06-05 21:24:50,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:24:50,701 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 21:24:50,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:24:51,103 INFO L225 Difference]: With dead ends: 142967 [2021-06-05 21:24:51,103 INFO L226 Difference]: Without dead ends: 142905 [2021-06-05 21:24:51,103 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 283.6ms TimeCoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:24:51,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142905 states. [2021-06-05 21:24:53,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142905 to 141282. [2021-06-05 21:24:53,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141282 states, 141281 states have (on average 3.6763329817880677) internal successors, (519396), 141281 states have internal predecessors, (519396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:54,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141282 states to 141282 states and 519396 transitions. [2021-06-05 21:24:54,089 INFO L78 Accepts]: Start accepts. Automaton has 141282 states and 519396 transitions. Word has length 33 [2021-06-05 21:24:54,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:24:54,089 INFO L482 AbstractCegarLoop]: Abstraction has 141282 states and 519396 transitions. [2021-06-05 21:24:54,089 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:54,089 INFO L276 IsEmpty]: Start isEmpty. Operand 141282 states and 519396 transitions. [2021-06-05 21:24:54,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 21:24:54,365 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:24:54,365 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:24:54,565 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2021-06-05 21:24:54,565 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:24:54,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:24:54,566 INFO L82 PathProgramCache]: Analyzing trace with hash -845756646, now seen corresponding path program 204 times [2021-06-05 21:24:54,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:24:54,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008152816] [2021-06-05 21:24:54,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:24:54,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:24:54,641 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:24:54,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:24:54,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008152816] [2021-06-05 21:24:54,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008152816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:54,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717880350] [2021-06-05 21:24:54,641 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 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:24:54,667 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:24:54,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:24:54,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:24:54,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:24:55,180 WARN L205 SmtUtils]: Spent 502.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2021-06-05 21:24:55,417 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:24:55,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717880350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:55,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:24:55,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-05 21:24:55,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930234054] [2021-06-05 21:24:55,417 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:24:55,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:24:55,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:24:55,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:24:55,418 INFO L87 Difference]: Start difference. First operand 141282 states and 519396 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:56,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:24:56,334 INFO L93 Difference]: Finished difference Result 142385 states and 522684 transitions. [2021-06-05 21:24:56,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:24:56,335 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 21:24:56,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:24:56,737 INFO L225 Difference]: With dead ends: 142385 [2021-06-05 21:24:56,737 INFO L226 Difference]: Without dead ends: 142345 [2021-06-05 21:24:56,737 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 793.3ms TimeCoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:24:57,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142345 states. [2021-06-05 21:24:59,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142345 to 141544. [2021-06-05 21:24:59,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141544 states, 141543 states have (on average 3.6762538592512524) internal successors, (520348), 141543 states have internal predecessors, (520348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:00,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141544 states to 141544 states and 520348 transitions. [2021-06-05 21:25:00,301 INFO L78 Accepts]: Start accepts. Automaton has 141544 states and 520348 transitions. Word has length 33 [2021-06-05 21:25:00,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:00,301 INFO L482 AbstractCegarLoop]: Abstraction has 141544 states and 520348 transitions. [2021-06-05 21:25:00,301 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:00,301 INFO L276 IsEmpty]: Start isEmpty. Operand 141544 states and 520348 transitions. [2021-06-05 21:25:00,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 21:25:00,584 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:00,584 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:00,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2021-06-05 21:25:00,784 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:00,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:00,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1736447074, now seen corresponding path program 205 times [2021-06-05 21:25:00,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:00,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660288071] [2021-06-05 21:25:00,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:00,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:00,866 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:00,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:00,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660288071] [2021-06-05 21:25:00,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660288071] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:00,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788615170] [2021-06-05 21:25:00,867 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 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:00,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:00,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:25:00,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:01,105 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:01,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788615170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:01,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:01,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-05 21:25:01,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139294202] [2021-06-05 21:25:01,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:25:01,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:01,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:25:01,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:25:01,106 INFO L87 Difference]: Start difference. First operand 141544 states and 520348 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:02,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:02,675 INFO L93 Difference]: Finished difference Result 142511 states and 523171 transitions. [2021-06-05 21:25:02,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:25:02,675 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 21:25:02,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:03,112 INFO L225 Difference]: With dead ends: 142511 [2021-06-05 21:25:03,113 INFO L226 Difference]: Without dead ends: 142368 [2021-06-05 21:25:03,113 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 268.3ms TimeCoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:25:03,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142368 states. Received shutdown request... [2021-06-05 21:25:03,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-06-05 21:25:03,616 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 21:25:03,618 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 21:25:03,619 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 21:25:03,619 INFO L202 PluginConnector]: Adding new model mult-flipped-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 09:25:03 BasicIcfg [2021-06-05 21:25:03,619 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 21:25:03,619 INFO L168 Benchmark]: Toolchain (without parser) took 702504.39 ms. Allocated memory was 381.7 MB in the beginning and 16.0 GB in the end (delta: 15.6 GB). Free memory was 361.2 MB in the beginning and 10.1 GB in the end (delta: -9.8 GB). Peak memory consumption was 5.9 GB. Max. memory is 16.0 GB. [2021-06-05 21:25:03,620 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 381.7 MB. Free memory is still 362.3 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 21:25:03,620 INFO L168 Benchmark]: Boogie Procedure Inliner took 17.40 ms. Allocated memory is still 381.7 MB. Free memory was 361.1 MB in the beginning and 359.7 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 21:25:03,620 INFO L168 Benchmark]: Boogie Preprocessor took 10.64 ms. Allocated memory is still 381.7 MB. Free memory was 359.7 MB in the beginning and 358.7 MB in the end (delta: 957.0 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 21:25:03,620 INFO L168 Benchmark]: RCFGBuilder took 221.02 ms. Allocated memory is still 381.7 MB. Free memory was 358.6 MB in the beginning and 346.1 MB in the end (delta: 12.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. [2021-06-05 21:25:03,620 INFO L168 Benchmark]: TraceAbstraction took 702251.97 ms. Allocated memory was 381.7 MB in the beginning and 16.0 GB in the end (delta: 15.6 GB). Free memory was 345.7 MB in the beginning and 10.1 GB in the end (delta: -9.8 GB). Peak memory consumption was 5.8 GB. Max. memory is 16.0 GB. [2021-06-05 21:25:03,620 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 381.7 MB. Free memory is still 362.3 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 17.40 ms. Allocated memory is still 381.7 MB. Free memory was 361.1 MB in the beginning and 359.7 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 10.64 ms. Allocated memory is still 381.7 MB. Free memory was 359.7 MB in the beginning and 358.7 MB in the end (delta: 957.0 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 221.02 ms. Allocated memory is still 381.7 MB. Free memory was 358.6 MB in the beginning and 346.1 MB in the end (delta: 12.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 702251.97 ms. Allocated memory was 381.7 MB in the beginning and 16.0 GB in the end (delta: 15.6 GB). Free memory was 345.7 MB in the beginning and 10.1 GB in the end (delta: -9.8 GB). Peak memory consumption was 5.8 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 63]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while executing MinimizeSevpa. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 7 procedures, 39 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 702188.0ms, OverallIterations: 214, TraceHistogramMax: 3, EmptinessCheckTime: 40590.7ms, AutomataDifference: 219434.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 55.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 13123 SDtfs, 25787 SDslu, 139217 SDs, 0 SdLazy, 92384 SolverSat, 3989 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 38093.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9284 GetRequests, 4640 SyntacticMatches, 52 SemanticMatches, 4592 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34350 ImplicationChecksByTransitivity, 52260.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=141544occurred in iteration=213, InterpolantAutomatonStates: 3767, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 342646.4ms AutomataMinimizationTime, 214 MinimizatonAttempts, 702288 StatesRemovedByMinimization, 213 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1503.3ms SsaConstructionTime, 1996.0ms SatisfiabilityAnalysisTime, 48250.0ms InterpolantComputationTime, 12215 NumberOfCodeBlocks, 12199 NumberOfCodeBlocksAsserted, 804 NumberOfCheckSat, 11794 ConstructedInterpolants, 0 QuantifiedInterpolants, 161383 SizeOfPredicates, 879 NumberOfNonLiveVariables, 16842 ConjunctsInSsa, 3791 ConjunctsInUnsatCore, 421 InterpolantComputations, 7 PerfectInterpolantSequences, 817/7514 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown