/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/figure1-alt.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9bbddad6b14272d9691b7fb6f1c011d15ab18596-9bbddad [2021-06-12 20:52:56,636 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-12 20:52:56,638 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-12 20:52:56,668 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-12 20:52:56,688 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-12 20:52:56,690 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-12 20:52:56,691 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-12 20:52:56,692 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-12 20:52:56,694 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-12 20:52:56,695 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-12 20:52:56,697 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-12 20:52:56,703 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-12 20:52:56,704 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-12 20:52:56,706 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-12 20:52:56,706 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-12 20:52:56,708 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-12 20:52:56,712 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-06-12 20:52:56,723 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-12 20:52:56,724 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-12 20:52:56,724 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-12 20:52:56,725 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-12 20:52:56,763 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-12 20:52:56,763 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-12 20:52:56,764 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-12 20:52:56,764 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-12 20:52:56,780 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-12 20:52:56,780 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-12 20:52:56,780 INFO L138 SettingsManager]: * Use SBE=true [2021-06-12 20:52:56,781 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-12 20:52:56,781 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-12 20:52:56,781 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-12 20:52:56,781 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-12 20:52:56,781 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-12 20:52:56,781 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-12 20:52:56,782 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-12 20:52:56,782 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-12 20:52:56,782 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-12 20:52:56,782 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-12 20:52:56,782 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-12 20:52:56,782 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-12 20:52:56,782 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-12 20:52:56,783 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-12 20:52:56,783 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-12 20:52:56,783 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-12 20:52:56,783 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-12 20:52:56,783 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-12 20:52:56,783 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-12 20:52:56,783 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-12 20:52:56,784 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-12 20:52:56,784 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-12 20:52:56,784 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-12 20:52:56,784 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-12 20:52:56,784 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-12 20:52:57,045 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-12 20:52:57,061 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-12 20:52:57,063 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-12 20:52:57,064 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-12 20:52:57,065 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-12 20:52:57,066 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/figure1-alt.wvr.bpl [2021-06-12 20:52:57,066 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/figure1-alt.wvr.bpl' [2021-06-12 20:52:57,097 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-12 20:52:57,098 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-12 20:52:57,099 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-12 20:52:57,099 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-12 20:52:57,099 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-12 20:52:57,109 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "figure1-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:52:57" (1/1) ... [2021-06-12 20:52:57,114 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "figure1-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:52:57" (1/1) ... [2021-06-12 20:52:57,121 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-12 20:52:57,122 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-12 20:52:57,123 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-12 20:52:57,123 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-12 20:52:57,128 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "figure1-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:52:57" (1/1) ... [2021-06-12 20:52:57,128 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "figure1-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:52:57" (1/1) ... [2021-06-12 20:52:57,129 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "figure1-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:52:57" (1/1) ... [2021-06-12 20:52:57,129 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "figure1-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:52:57" (1/1) ... [2021-06-12 20:52:57,130 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "figure1-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:52:57" (1/1) ... [2021-06-12 20:52:57,133 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "figure1-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:52:57" (1/1) ... [2021-06-12 20:52:57,133 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "figure1-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:52:57" (1/1) ... [2021-06-12 20:52:57,134 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-12 20:52:57,135 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-12 20:52:57,135 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-12 20:52:57,135 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-12 20:52:57,136 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "figure1-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:52:57" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-12 20:52:57,212 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-12 20:52:57,212 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-12 20:52:57,212 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-12 20:52:57,213 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-12 20:52:57,213 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-12 20:52:57,213 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-12 20:52:57,213 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-12 20:52:57,213 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-12 20:52:57,213 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-12 20:52:57,214 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-12 20:52:57,366 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-12 20:52:57,367 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-12 20:52:57,368 INFO L202 PluginConnector]: Adding new model figure1-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 08:52:57 BoogieIcfgContainer [2021-06-12 20:52:57,369 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-12 20:52:57,370 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-12 20:52:57,370 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-12 20:52:57,372 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-12 20:52:57,373 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "figure1-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:52:57" (1/2) ... [2021-06-12 20:52:57,373 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b82927c and model type figure1-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.06 08:52:57, skipping insertion in model container [2021-06-12 20:52:57,373 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "figure1-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 08:52:57" (2/2) ... [2021-06-12 20:52:57,375 INFO L111 eAbstractionObserver]: Analyzing ICFG figure1-alt.wvr.bpl [2021-06-12 20:52:57,379 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-12 20:52:57,379 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-12 20:52:57,379 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-12 20:52:57,380 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-12 20:52:57,435 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-12 20:52:57,451 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-12 20:52:57,486 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-12 20:52:57,486 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-12 20:52:57,486 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-12 20:52:57,486 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-12 20:52:57,486 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-12 20:52:57,486 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-12 20:52:57,486 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-12 20:52:57,487 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-12 20:52:57,494 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 28 places, 23 transitions, 62 flow [2021-06-12 20:52:57,505 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 35 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:52:57,507 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:52:57,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 20:52:57,512 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:52:57,512 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:52:57,513 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:52:57,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:52:57,519 INFO L82 PathProgramCache]: Analyzing trace with hash -1829606569, now seen corresponding path program 1 times [2021-06-12 20:52:57,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:52:57,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560967010] [2021-06-12 20:52:57,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:52:57,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:52:57,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:52:57,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:52:57,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560967010] [2021-06-12 20:52:57,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560967010] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:52:57,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:52:57,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 20:52:57,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598021414] [2021-06-12 20:52:57,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 20:52:57,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:52:57,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 20:52:57,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-12 20:52:57,815 INFO L87 Difference]: Start difference. First operand has 35 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 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) [2021-06-12 20:52:58,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:52:58,014 INFO L93 Difference]: Finished difference Result 67 states and 111 transitions. [2021-06-12 20:52:58,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:52:58,016 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 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 [2021-06-12 20:52:58,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:52:58,025 INFO L225 Difference]: With dead ends: 67 [2021-06-12 20:52:58,025 INFO L226 Difference]: Without dead ends: 52 [2021-06-12 20:52:58,028 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 210.6ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:52:58,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-06-12 20:52:58,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 39. [2021-06-12 20:52:58,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 38 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:52:58,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 69 transitions. [2021-06-12 20:52:58,067 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 69 transitions. Word has length 15 [2021-06-12 20:52:58,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:52:58,068 INFO L482 AbstractCegarLoop]: Abstraction has 39 states and 69 transitions. [2021-06-12 20:52:58,068 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 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) [2021-06-12 20:52:58,068 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 69 transitions. [2021-06-12 20:52:58,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 20:52:58,069 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:52:58,069 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:52:58,070 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-12 20:52:58,070 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:52:58,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:52:58,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1179537599, now seen corresponding path program 2 times [2021-06-12 20:52:58,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:52:58,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67754009] [2021-06-12 20:52:58,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:52:58,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:52:58,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:52:58,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:52:58,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67754009] [2021-06-12 20:52:58,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67754009] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:52:58,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:52:58,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 20:52:58,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224860968] [2021-06-12 20:52:58,249 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 20:52:58,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:52:58,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 20:52:58,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-12 20:52:58,254 INFO L87 Difference]: Start difference. First operand 39 states and 69 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 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) [2021-06-12 20:52:58,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:52:58,408 INFO L93 Difference]: Finished difference Result 50 states and 85 transitions. [2021-06-12 20:52:58,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:52:58,408 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 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 [2021-06-12 20:52:58,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:52:58,409 INFO L225 Difference]: With dead ends: 50 [2021-06-12 20:52:58,409 INFO L226 Difference]: Without dead ends: 43 [2021-06-12 20:52:58,410 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 158.7ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:52:58,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-06-12 20:52:58,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2021-06-12 20:52:58,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.8) internal successors, (72), 40 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:52:58,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 72 transitions. [2021-06-12 20:52:58,421 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 72 transitions. Word has length 15 [2021-06-12 20:52:58,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:52:58,421 INFO L482 AbstractCegarLoop]: Abstraction has 41 states and 72 transitions. [2021-06-12 20:52:58,421 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 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) [2021-06-12 20:52:58,421 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 72 transitions. [2021-06-12 20:52:58,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 20:52:58,422 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:52:58,422 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:52:58,422 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-12 20:52:58,423 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:52:58,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:52:58,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1059156761, now seen corresponding path program 1 times [2021-06-12 20:52:58,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:52:58,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075179852] [2021-06-12 20:52:58,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:52:58,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:52:58,579 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:52:58,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:52:58,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075179852] [2021-06-12 20:52:58,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075179852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:52:58,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933249569] [2021-06-12 20:52:58,581 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) [2021-06-12 20:52:58,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:52:58,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 13 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:52:58,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:52:58,948 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:52:58,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933249569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:52:58,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:52:58,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-12 20:52:58,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453917403] [2021-06-12 20:52:58,951 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:52:58,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:52:58,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:52:58,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:52:58,955 INFO L87 Difference]: Start difference. First operand 41 states and 72 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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) [2021-06-12 20:52:59,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:52:59,260 INFO L93 Difference]: Finished difference Result 107 states and 185 transitions. [2021-06-12 20:52:59,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:52:59,262 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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 17 [2021-06-12 20:52:59,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:52:59,266 INFO L225 Difference]: With dead ends: 107 [2021-06-12 20:52:59,270 INFO L226 Difference]: Without dead ends: 93 [2021-06-12 20:52:59,271 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 398.3ms TimeCoverageRelationStatistics Valid=143, Invalid=457, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:52:59,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-06-12 20:52:59,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 46. [2021-06-12 20:52:59,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.8666666666666667) internal successors, (84), 45 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:52:59,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 84 transitions. [2021-06-12 20:52:59,276 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 84 transitions. Word has length 17 [2021-06-12 20:52:59,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:52:59,277 INFO L482 AbstractCegarLoop]: Abstraction has 46 states and 84 transitions. [2021-06-12 20:52:59,277 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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) [2021-06-12 20:52:59,277 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 84 transitions. [2021-06-12 20:52:59,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 20:52:59,278 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:52:59,278 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:52:59,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-06-12 20:52:59,493 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:52:59,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:52:59,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1709225731, now seen corresponding path program 2 times [2021-06-12 20:52:59,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:52:59,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102053348] [2021-06-12 20:52:59,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:52:59,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:52:59,607 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:52:59,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:52:59,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102053348] [2021-06-12 20:52:59,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102053348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:52:59,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013877050] [2021-06-12 20:52:59,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:52:59,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:52:59,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:52:59,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 20:52:59,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:52:59,898 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:52:59,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013877050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:52:59,898 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:52:59,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-12 20:52:59,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536885860] [2021-06-12 20:52:59,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:52:59,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:52:59,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:52:59,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:52:59,900 INFO L87 Difference]: Start difference. First operand 46 states and 84 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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) [2021-06-12 20:53:00,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:53:00,271 INFO L93 Difference]: Finished difference Result 117 states and 198 transitions. [2021-06-12 20:53:00,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 20:53:00,272 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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 17 [2021-06-12 20:53:00,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:53:00,273 INFO L225 Difference]: With dead ends: 117 [2021-06-12 20:53:00,273 INFO L226 Difference]: Without dead ends: 103 [2021-06-12 20:53:00,273 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 451.1ms TimeCoverageRelationStatistics Valid=188, Invalid=568, Unknown=0, NotChecked=0, Total=756 [2021-06-12 20:53:00,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-06-12 20:53:00,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 46. [2021-06-12 20:53:00,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.8666666666666667) internal successors, (84), 45 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:00,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 84 transitions. [2021-06-12 20:53:00,280 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 84 transitions. Word has length 17 [2021-06-12 20:53:00,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:53:00,280 INFO L482 AbstractCegarLoop]: Abstraction has 46 states and 84 transitions. [2021-06-12 20:53:00,280 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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) [2021-06-12 20:53:00,280 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 84 transitions. [2021-06-12 20:53:00,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 20:53:00,281 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:53:00,281 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:53:00,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:53:00,497 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:53:00,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:53:00,498 INFO L82 PathProgramCache]: Analyzing trace with hash -351634071, now seen corresponding path program 3 times [2021-06-12 20:53:00,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:53:00,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268907705] [2021-06-12 20:53:00,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:53:00,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:53:00,623 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:00,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:53:00,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268907705] [2021-06-12 20:53:00,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268907705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:00,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884784070] [2021-06-12 20:53:00,624 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:53:00,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:53:00,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:53:00,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 20:53:00,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:53:00,858 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:00,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884784070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:00,858 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:53:00,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-12 20:53:00,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559259164] [2021-06-12 20:53:00,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:53:00,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:53:00,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:53:00,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:53:00,860 INFO L87 Difference]: Start difference. First operand 46 states and 84 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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) [2021-06-12 20:53:01,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:53:01,146 INFO L93 Difference]: Finished difference Result 94 states and 156 transitions. [2021-06-12 20:53:01,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:53:01,149 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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 17 [2021-06-12 20:53:01,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:53:01,150 INFO L225 Difference]: With dead ends: 94 [2021-06-12 20:53:01,150 INFO L226 Difference]: Without dead ends: 80 [2021-06-12 20:53:01,151 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 385.9ms TimeCoverageRelationStatistics Valid=170, Invalid=532, Unknown=0, NotChecked=0, Total=702 [2021-06-12 20:53:01,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-06-12 20:53:01,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 52. [2021-06-12 20:53:01,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.8235294117647058) internal successors, (93), 51 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:01,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 93 transitions. [2021-06-12 20:53:01,159 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 93 transitions. Word has length 17 [2021-06-12 20:53:01,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:53:01,159 INFO L482 AbstractCegarLoop]: Abstraction has 52 states and 93 transitions. [2021-06-12 20:53:01,159 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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) [2021-06-12 20:53:01,159 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 93 transitions. [2021-06-12 20:53:01,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 20:53:01,160 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:53:01,160 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:53:01,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:53:01,381 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:53:01,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:53:01,381 INFO L82 PathProgramCache]: Analyzing trace with hash -886863873, now seen corresponding path program 4 times [2021-06-12 20:53:01,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:53:01,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7482159] [2021-06-12 20:53:01,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:53:01,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:53:01,477 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:01,480 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:53:01,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7482159] [2021-06-12 20:53:01,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7482159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:01,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999989316] [2021-06-12 20:53:01,480 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:53:01,515 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:53:01,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:53:01,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 20:53:01,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:53:01,697 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:01,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999989316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:01,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:53:01,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-12 20:53:01,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720663126] [2021-06-12 20:53:01,698 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:53:01,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:53:01,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:53:01,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:53:01,699 INFO L87 Difference]: Start difference. First operand 52 states and 93 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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) [2021-06-12 20:53:01,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:53:01,952 INFO L93 Difference]: Finished difference Result 87 states and 147 transitions. [2021-06-12 20:53:01,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:53:01,952 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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 17 [2021-06-12 20:53:01,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:53:01,953 INFO L225 Difference]: With dead ends: 87 [2021-06-12 20:53:01,953 INFO L226 Difference]: Without dead ends: 49 [2021-06-12 20:53:01,953 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 339.9ms TimeCoverageRelationStatistics Valid=175, Invalid=527, Unknown=0, NotChecked=0, Total=702 [2021-06-12 20:53:01,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-06-12 20:53:01,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 44. [2021-06-12 20:53:01,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 43 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:01,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 77 transitions. [2021-06-12 20:53:01,957 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 77 transitions. Word has length 17 [2021-06-12 20:53:01,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:53:01,957 INFO L482 AbstractCegarLoop]: Abstraction has 44 states and 77 transitions. [2021-06-12 20:53:01,957 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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) [2021-06-12 20:53:01,957 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 77 transitions. [2021-06-12 20:53:01,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:53:01,958 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:53:01,958 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:53:02,158 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:53:02,159 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:53:02,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:53:02,159 INFO L82 PathProgramCache]: Analyzing trace with hash -980318313, now seen corresponding path program 1 times [2021-06-12 20:53:02,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:53:02,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559334447] [2021-06-12 20:53:02,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:53:02,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:53:02,253 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:02,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:53:02,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559334447] [2021-06-12 20:53:02,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559334447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:02,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789152285] [2021-06-12 20:53:02,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:53:02,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:53:02,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 20:53:02,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:53:02,507 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:02,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789152285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:02,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:53:02,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 20:53:02,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298743742] [2021-06-12 20:53:02,508 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:53:02,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:53:02,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:53:02,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:53:02,509 INFO L87 Difference]: Start difference. First operand 44 states and 77 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:02,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:53:02,771 INFO L93 Difference]: Finished difference Result 113 states and 197 transitions. [2021-06-12 20:53:02,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:53:02,771 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 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 19 [2021-06-12 20:53:02,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:53:02,772 INFO L225 Difference]: With dead ends: 113 [2021-06-12 20:53:02,772 INFO L226 Difference]: Without dead ends: 76 [2021-06-12 20:53:02,772 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 371.7ms TimeCoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2021-06-12 20:53:02,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-06-12 20:53:02,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 54. [2021-06-12 20:53:02,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.849056603773585) internal successors, (98), 53 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:02,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 98 transitions. [2021-06-12 20:53:02,776 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 98 transitions. Word has length 19 [2021-06-12 20:53:02,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:53:02,776 INFO L482 AbstractCegarLoop]: Abstraction has 54 states and 98 transitions. [2021-06-12 20:53:02,777 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:02,777 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 98 transitions. [2021-06-12 20:53:02,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:53:02,777 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:53:02,777 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:53:02,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-06-12 20:53:02,989 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:53:02,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:53:02,989 INFO L82 PathProgramCache]: Analyzing trace with hash 2049721123, now seen corresponding path program 2 times [2021-06-12 20:53:02,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:53:02,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098322578] [2021-06-12 20:53:02,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:53:02,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:53:03,084 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:03,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:53:03,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098322578] [2021-06-12 20:53:03,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098322578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:03,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966106138] [2021-06-12 20:53:03,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:53:03,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:53:03,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:53:03,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 20:53:03,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:53:03,330 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:03,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966106138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:03,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:53:03,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 20:53:03,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528176360] [2021-06-12 20:53:03,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:53:03,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:53:03,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:53:03,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:53:03,332 INFO L87 Difference]: Start difference. First operand 54 states and 98 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:03,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:53:03,666 INFO L93 Difference]: Finished difference Result 120 states and 202 transitions. [2021-06-12 20:53:03,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 20:53:03,666 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 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 19 [2021-06-12 20:53:03,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:53:03,667 INFO L225 Difference]: With dead ends: 120 [2021-06-12 20:53:03,667 INFO L226 Difference]: Without dead ends: 94 [2021-06-12 20:53:03,668 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 431.9ms TimeCoverageRelationStatistics Valid=175, Invalid=695, Unknown=0, NotChecked=0, Total=870 [2021-06-12 20:53:03,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-06-12 20:53:03,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 56. [2021-06-12 20:53:03,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.8363636363636364) internal successors, (101), 55 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:03,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 101 transitions. [2021-06-12 20:53:03,678 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 101 transitions. Word has length 19 [2021-06-12 20:53:03,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:53:03,678 INFO L482 AbstractCegarLoop]: Abstraction has 56 states and 101 transitions. [2021-06-12 20:53:03,678 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:03,679 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 101 transitions. [2021-06-12 20:53:03,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:53:03,679 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:53:03,679 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:53:03,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:53:03,897 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:53:03,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:53:03,898 INFO L82 PathProgramCache]: Analyzing trace with hash -1109060901, now seen corresponding path program 3 times [2021-06-12 20:53:03,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:53:03,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752412424] [2021-06-12 20:53:03,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:53:03,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:53:03,986 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:03,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:53:03,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752412424] [2021-06-12 20:53:03,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752412424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:03,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518393443] [2021-06-12 20:53:03,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:53:04,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:53:04,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:53:04,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 20:53:04,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:53:04,190 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:04,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518393443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:04,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:53:04,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 20:53:04,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445454057] [2021-06-12 20:53:04,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:53:04,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:53:04,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:53:04,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:53:04,192 INFO L87 Difference]: Start difference. First operand 56 states and 101 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:04,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:53:04,575 INFO L93 Difference]: Finished difference Result 130 states and 216 transitions. [2021-06-12 20:53:04,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 20:53:04,576 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 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 19 [2021-06-12 20:53:04,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:53:04,576 INFO L225 Difference]: With dead ends: 130 [2021-06-12 20:53:04,576 INFO L226 Difference]: Without dead ends: 110 [2021-06-12 20:53:04,577 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 467.9ms TimeCoverageRelationStatistics Valid=200, Invalid=792, Unknown=0, NotChecked=0, Total=992 [2021-06-12 20:53:04,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-06-12 20:53:04,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 65. [2021-06-12 20:53:04,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.875) internal successors, (120), 64 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:04,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 120 transitions. [2021-06-12 20:53:04,581 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 120 transitions. Word has length 19 [2021-06-12 20:53:04,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:53:04,581 INFO L482 AbstractCegarLoop]: Abstraction has 65 states and 120 transitions. [2021-06-12 20:53:04,581 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:04,581 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 120 transitions. [2021-06-12 20:53:04,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:53:04,582 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:53:04,582 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:53:04,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:53:04,789 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:53:04,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:53:04,789 INFO L82 PathProgramCache]: Analyzing trace with hash -458991931, now seen corresponding path program 4 times [2021-06-12 20:53:04,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:53:04,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433082315] [2021-06-12 20:53:04,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:53:04,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:53:04,884 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:04,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:53:04,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433082315] [2021-06-12 20:53:04,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433082315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:04,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118547095] [2021-06-12 20:53:04,884 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:53:04,903 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:53:04,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:53:04,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 20:53:04,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:53:05,104 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:05,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118547095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:05,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:53:05,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 20:53:05,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593124780] [2021-06-12 20:53:05,105 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:53:05,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:53:05,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:53:05,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:53:05,106 INFO L87 Difference]: Start difference. First operand 65 states and 120 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:05,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:53:05,449 INFO L93 Difference]: Finished difference Result 106 states and 184 transitions. [2021-06-12 20:53:05,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 20:53:05,449 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 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 19 [2021-06-12 20:53:05,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:53:05,450 INFO L225 Difference]: With dead ends: 106 [2021-06-12 20:53:05,450 INFO L226 Difference]: Without dead ends: 92 [2021-06-12 20:53:05,450 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 417.5ms TimeCoverageRelationStatistics Valid=193, Invalid=737, Unknown=0, NotChecked=0, Total=930 [2021-06-12 20:53:05,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-06-12 20:53:05,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 67. [2021-06-12 20:53:05,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.8636363636363635) internal successors, (123), 66 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:05,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 123 transitions. [2021-06-12 20:53:05,454 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 123 transitions. Word has length 19 [2021-06-12 20:53:05,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:53:05,454 INFO L482 AbstractCegarLoop]: Abstraction has 67 states and 123 transitions. [2021-06-12 20:53:05,454 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:05,454 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 123 transitions. [2021-06-12 20:53:05,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:53:05,455 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:53:05,455 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:53:05,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-12 20:53:05,673 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:53:05,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:53:05,673 INFO L82 PathProgramCache]: Analyzing trace with hash -2036952865, now seen corresponding path program 5 times [2021-06-12 20:53:05,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:53:05,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006916632] [2021-06-12 20:53:05,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:53:05,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:53:05,757 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:05,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:53:05,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006916632] [2021-06-12 20:53:05,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006916632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:05,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789958709] [2021-06-12 20:53:05,758 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:53:05,793 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:53:05,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:53:05,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 20:53:05,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:53:05,970 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:05,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789958709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:05,970 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:53:05,970 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 20:53:05,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944735227] [2021-06-12 20:53:05,970 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:53:05,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:53:05,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:53:05,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:53:05,971 INFO L87 Difference]: Start difference. First operand 67 states and 123 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:06,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:53:06,135 INFO L93 Difference]: Finished difference Result 95 states and 164 transitions. [2021-06-12 20:53:06,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:53:06,135 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 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 19 [2021-06-12 20:53:06,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:53:06,137 INFO L225 Difference]: With dead ends: 95 [2021-06-12 20:53:06,137 INFO L226 Difference]: Without dead ends: 82 [2021-06-12 20:53:06,137 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 245.2ms TimeCoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:53:06,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-06-12 20:53:06,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 64. [2021-06-12 20:53:06,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.8571428571428572) internal successors, (117), 63 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:06,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 117 transitions. [2021-06-12 20:53:06,140 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 117 transitions. Word has length 19 [2021-06-12 20:53:06,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:53:06,140 INFO L482 AbstractCegarLoop]: Abstraction has 64 states and 117 transitions. [2021-06-12 20:53:06,140 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:06,140 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 117 transitions. [2021-06-12 20:53:06,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:53:06,141 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:53:06,141 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:53:06,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:53:06,353 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:53:06,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:53:06,353 INFO L82 PathProgramCache]: Analyzing trace with hash -900767593, now seen corresponding path program 6 times [2021-06-12 20:53:06,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:53:06,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441109085] [2021-06-12 20:53:06,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:53:06,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:53:06,459 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:06,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:53:06,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441109085] [2021-06-12 20:53:06,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441109085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:06,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364880250] [2021-06-12 20:53:06,460 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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) [2021-06-12 20:53:06,490 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:53:06,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:53:06,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 20:53:06,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:53:06,702 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:06,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364880250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:06,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:53:06,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 20:53:06,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997197540] [2021-06-12 20:53:06,703 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:53:06,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:53:06,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:53:06,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:53:06,704 INFO L87 Difference]: Start difference. First operand 64 states and 117 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:06,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:53:06,817 INFO L93 Difference]: Finished difference Result 86 states and 145 transitions. [2021-06-12 20:53:06,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:53:06,818 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 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 19 [2021-06-12 20:53:06,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:53:06,818 INFO L225 Difference]: With dead ends: 86 [2021-06-12 20:53:06,818 INFO L226 Difference]: Without dead ends: 76 [2021-06-12 20:53:06,819 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 270.6ms TimeCoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:53:06,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-06-12 20:53:06,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 59. [2021-06-12 20:53:06,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.8275862068965518) internal successors, (106), 58 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:06,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 106 transitions. [2021-06-12 20:53:06,821 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 106 transitions. Word has length 19 [2021-06-12 20:53:06,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:53:06,821 INFO L482 AbstractCegarLoop]: Abstraction has 59 states and 106 transitions. [2021-06-12 20:53:06,822 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:06,822 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 106 transitions. [2021-06-12 20:53:06,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:53:06,822 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:53:06,822 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:53:07,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:53:07,040 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:53:07,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:53:07,041 INFO L82 PathProgramCache]: Analyzing trace with hash -250698623, now seen corresponding path program 7 times [2021-06-12 20:53:07,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:53:07,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894364489] [2021-06-12 20:53:07,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:53:07,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:53:07,130 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:07,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:53:07,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894364489] [2021-06-12 20:53:07,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894364489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:07,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899287367] [2021-06-12 20:53:07,131 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:53:07,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:53:07,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 20:53:07,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:53:07,336 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:07,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899287367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:07,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:53:07,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 20:53:07,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395981909] [2021-06-12 20:53:07,337 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:53:07,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:53:07,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:53:07,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:53:07,338 INFO L87 Difference]: Start difference. First operand 59 states and 106 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:07,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:53:07,440 INFO L93 Difference]: Finished difference Result 74 states and 129 transitions. [2021-06-12 20:53:07,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:53:07,441 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 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 19 [2021-06-12 20:53:07,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:53:07,441 INFO L225 Difference]: With dead ends: 74 [2021-06-12 20:53:07,441 INFO L226 Difference]: Without dead ends: 67 [2021-06-12 20:53:07,456 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 219.1ms TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:53:07,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-06-12 20:53:07,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 56. [2021-06-12 20:53:07,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.8181818181818181) internal successors, (100), 55 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:07,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 100 transitions. [2021-06-12 20:53:07,459 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 100 transitions. Word has length 19 [2021-06-12 20:53:07,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:53:07,459 INFO L482 AbstractCegarLoop]: Abstraction has 56 states and 100 transitions. [2021-06-12 20:53:07,459 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:07,460 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 100 transitions. [2021-06-12 20:53:07,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:53:07,460 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:53:07,460 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:53:07,678 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-06-12 20:53:07,679 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:53:07,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:53:07,679 INFO L82 PathProgramCache]: Analyzing trace with hash 798154329, now seen corresponding path program 8 times [2021-06-12 20:53:07,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:53:07,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297643662] [2021-06-12 20:53:07,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:53:07,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:53:07,778 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:53:07,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:53:07,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297643662] [2021-06-12 20:53:07,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297643662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:07,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62400985] [2021-06-12 20:53:07,779 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:53:07,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:53:07,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:53:07,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:53:07,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:53:08,006 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:08,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62400985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:08,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:53:08,007 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-06-12 20:53:08,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023432482] [2021-06-12 20:53:08,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:53:08,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:53:08,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:53:08,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:53:08,009 INFO L87 Difference]: Start difference. First operand 56 states and 100 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 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) [2021-06-12 20:53:08,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:53:08,490 INFO L93 Difference]: Finished difference Result 107 states and 190 transitions. [2021-06-12 20:53:08,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 20:53:08,490 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 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 21 [2021-06-12 20:53:08,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:53:08,490 INFO L225 Difference]: With dead ends: 107 [2021-06-12 20:53:08,490 INFO L226 Difference]: Without dead ends: 65 [2021-06-12 20:53:08,491 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 548.3ms TimeCoverageRelationStatistics Valid=271, Invalid=1289, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 20:53:08,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-06-12 20:53:08,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 51. [2021-06-12 20:53:08,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.74) internal successors, (87), 50 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:08,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 87 transitions. [2021-06-12 20:53:08,493 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 87 transitions. Word has length 21 [2021-06-12 20:53:08,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:53:08,493 INFO L482 AbstractCegarLoop]: Abstraction has 51 states and 87 transitions. [2021-06-12 20:53:08,493 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 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) [2021-06-12 20:53:08,493 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 87 transitions. [2021-06-12 20:53:08,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:53:08,493 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:53:08,493 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:53:08,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-12 20:53:08,697 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:53:08,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:53:08,697 INFO L82 PathProgramCache]: Analyzing trace with hash -466773531, now seen corresponding path program 9 times [2021-06-12 20:53:08,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:53:08,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076441145] [2021-06-12 20:53:08,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:53:08,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:53:08,792 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:53:08,792 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:53:08,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076441145] [2021-06-12 20:53:08,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076441145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:08,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375308635] [2021-06-12 20:53:08,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:53:08,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:53:08,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:53:08,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:53:08,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:53:09,087 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:09,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375308635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:09,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:53:09,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-06-12 20:53:09,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641861025] [2021-06-12 20:53:09,088 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:53:09,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:53:09,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:53:09,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:53:09,089 INFO L87 Difference]: Start difference. First operand 51 states and 87 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 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) [2021-06-12 20:53:09,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:53:09,691 INFO L93 Difference]: Finished difference Result 85 states and 141 transitions. [2021-06-12 20:53:09,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 20:53:09,691 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 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 21 [2021-06-12 20:53:09,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:53:09,692 INFO L225 Difference]: With dead ends: 85 [2021-06-12 20:53:09,692 INFO L226 Difference]: Without dead ends: 56 [2021-06-12 20:53:09,693 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 639.8ms TimeCoverageRelationStatistics Valid=359, Invalid=1711, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 20:53:09,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-06-12 20:53:09,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 48. [2021-06-12 20:53:09,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.7234042553191489) internal successors, (81), 47 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:09,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 81 transitions. [2021-06-12 20:53:09,695 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 81 transitions. Word has length 21 [2021-06-12 20:53:09,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:53:09,695 INFO L482 AbstractCegarLoop]: Abstraction has 48 states and 81 transitions. [2021-06-12 20:53:09,695 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 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) [2021-06-12 20:53:09,695 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 81 transitions. [2021-06-12 20:53:09,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:53:09,695 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:53:09,696 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:53:09,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-12 20:53:09,896 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:53:09,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:53:09,897 INFO L82 PathProgramCache]: Analyzing trace with hash 669411741, now seen corresponding path program 10 times [2021-06-12 20:53:09,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:53:09,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626139271] [2021-06-12 20:53:09,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:53:09,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:53:09,988 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:53:09,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:53:09,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626139271] [2021-06-12 20:53:09,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626139271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:09,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955301215] [2021-06-12 20:53:09,988 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:53:10,013 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:53:10,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:53:10,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:53:10,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:53:10,187 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:10,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955301215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:10,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:53:10,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-06-12 20:53:10,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295110022] [2021-06-12 20:53:10,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:53:10,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:53:10,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:53:10,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:53:10,188 INFO L87 Difference]: Start difference. First operand 48 states and 81 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 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) [2021-06-12 20:53:11,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:53:11,030 INFO L93 Difference]: Finished difference Result 90 states and 147 transitions. [2021-06-12 20:53:11,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 20:53:11,030 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 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 21 [2021-06-12 20:53:11,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:53:11,030 INFO L225 Difference]: With dead ends: 90 [2021-06-12 20:53:11,030 INFO L226 Difference]: Without dead ends: 70 [2021-06-12 20:53:11,031 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 694 ImplicationChecksByTransitivity, 825.6ms TimeCoverageRelationStatistics Valid=441, Invalid=2109, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 20:53:11,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-06-12 20:53:11,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 45. [2021-06-12 20:53:11,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.7045454545454546) internal successors, (75), 44 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:11,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 75 transitions. [2021-06-12 20:53:11,033 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 75 transitions. Word has length 21 [2021-06-12 20:53:11,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:53:11,033 INFO L482 AbstractCegarLoop]: Abstraction has 45 states and 75 transitions. [2021-06-12 20:53:11,033 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 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) [2021-06-12 20:53:11,033 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 75 transitions. [2021-06-12 20:53:11,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:53:11,034 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:53:11,034 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:53:11,234 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:53:11,234 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:53:11,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:53:11,235 INFO L82 PathProgramCache]: Analyzing trace with hash 1319480711, now seen corresponding path program 11 times [2021-06-12 20:53:11,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:53:11,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183740351] [2021-06-12 20:53:11,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:53:11,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:53:11,337 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:53:11,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:53:11,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183740351] [2021-06-12 20:53:11,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183740351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:11,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911644257] [2021-06-12 20:53:11,337 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:53:11,363 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:53:11,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:53:11,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:53:11,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:53:11,572 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:11,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911644257] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:11,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:53:11,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-06-12 20:53:11,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232481352] [2021-06-12 20:53:11,572 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:53:11,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:53:11,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:53:11,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:53:11,573 INFO L87 Difference]: Start difference. First operand 45 states and 75 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 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) [2021-06-12 20:53:12,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:53:12,401 INFO L93 Difference]: Finished difference Result 79 states and 133 transitions. [2021-06-12 20:53:12,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 20:53:12,402 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 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 21 [2021-06-12 20:53:12,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:53:12,402 INFO L225 Difference]: With dead ends: 79 [2021-06-12 20:53:12,402 INFO L226 Difference]: Without dead ends: 65 [2021-06-12 20:53:12,403 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 873.6ms TimeCoverageRelationStatistics Valid=441, Invalid=2109, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 20:53:12,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-06-12 20:53:12,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 45. [2021-06-12 20:53:12,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.7045454545454546) internal successors, (75), 44 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:12,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 75 transitions. [2021-06-12 20:53:12,404 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 75 transitions. Word has length 21 [2021-06-12 20:53:12,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:53:12,404 INFO L482 AbstractCegarLoop]: Abstraction has 45 states and 75 transitions. [2021-06-12 20:53:12,405 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 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) [2021-06-12 20:53:12,405 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 75 transitions. [2021-06-12 20:53:12,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:53:12,405 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:53:12,405 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:53:12,605 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-12 20:53:12,605 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:53:12,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:53:12,606 INFO L82 PathProgramCache]: Analyzing trace with hash -1793458263, now seen corresponding path program 12 times [2021-06-12 20:53:12,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:53:12,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085654802] [2021-06-12 20:53:12,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:53:12,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:53:12,700 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:12,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:53:12,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085654802] [2021-06-12 20:53:12,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085654802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:12,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747361474] [2021-06-12 20:53:12,701 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:53:12,719 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:53:12,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:53:12,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:53:12,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:53:12,922 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:12,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747361474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:12,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:53:12,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-12 20:53:12,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878269804] [2021-06-12 20:53:12,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:53:12,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:53:12,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:53:12,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:53:12,923 INFO L87 Difference]: Start difference. First operand 45 states and 75 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 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) [2021-06-12 20:53:13,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:53:13,339 INFO L93 Difference]: Finished difference Result 107 states and 173 transitions. [2021-06-12 20:53:13,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 20:53:13,340 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 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 21 [2021-06-12 20:53:13,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:53:13,340 INFO L225 Difference]: With dead ends: 107 [2021-06-12 20:53:13,340 INFO L226 Difference]: Without dead ends: 93 [2021-06-12 20:53:13,341 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 510.8ms TimeCoverageRelationStatistics Valid=224, Invalid=1108, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 20:53:13,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-06-12 20:53:13,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 49. [2021-06-12 20:53:13,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.8125) internal successors, (87), 48 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:13,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 87 transitions. [2021-06-12 20:53:13,342 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 87 transitions. Word has length 21 [2021-06-12 20:53:13,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:53:13,342 INFO L482 AbstractCegarLoop]: Abstraction has 49 states and 87 transitions. [2021-06-12 20:53:13,343 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 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) [2021-06-12 20:53:13,343 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 87 transitions. [2021-06-12 20:53:13,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:53:13,343 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:53:13,343 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:53:13,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-12 20:53:13,557 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:53:13,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:53:13,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1615710753, now seen corresponding path program 13 times [2021-06-12 20:53:13,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:53:13,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932678910] [2021-06-12 20:53:13,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:53:13,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:53:13,649 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:13,649 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:53:13,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932678910] [2021-06-12 20:53:13,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932678910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:13,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420630008] [2021-06-12 20:53:13,650 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:53:13,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:53:13,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:53:13,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:53:13,857 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:13,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420630008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:13,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:53:13,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-12 20:53:13,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483759881] [2021-06-12 20:53:13,857 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:53:13,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:53:13,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:53:13,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:53:13,858 INFO L87 Difference]: Start difference. First operand 49 states and 87 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 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) [2021-06-12 20:53:14,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:53:14,196 INFO L93 Difference]: Finished difference Result 114 states and 189 transitions. [2021-06-12 20:53:14,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 20:53:14,196 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 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 21 [2021-06-12 20:53:14,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:53:14,197 INFO L225 Difference]: With dead ends: 114 [2021-06-12 20:53:14,197 INFO L226 Difference]: Without dead ends: 100 [2021-06-12 20:53:14,197 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 427.6ms TimeCoverageRelationStatistics Valid=224, Invalid=1108, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 20:53:14,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-06-12 20:53:14,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 50. [2021-06-12 20:53:14,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.816326530612245) internal successors, (89), 49 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:14,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 89 transitions. [2021-06-12 20:53:14,200 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 89 transitions. Word has length 21 [2021-06-12 20:53:14,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:53:14,200 INFO L482 AbstractCegarLoop]: Abstraction has 50 states and 89 transitions. [2021-06-12 20:53:14,200 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 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) [2021-06-12 20:53:14,200 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 89 transitions. [2021-06-12 20:53:14,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:53:14,200 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:53:14,200 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:53:14,413 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:53:14,413 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:53:14,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:53:14,413 INFO L82 PathProgramCache]: Analyzing trace with hash 603018221, now seen corresponding path program 14 times [2021-06-12 20:53:14,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:53:14,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295826624] [2021-06-12 20:53:14,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:53:14,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:53:14,490 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:14,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:53:14,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295826624] [2021-06-12 20:53:14,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295826624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:14,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505799300] [2021-06-12 20:53:14,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:53:14,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:53:14,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:53:14,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:53:14,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:53:14,744 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:14,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505799300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:14,745 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:53:14,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-12 20:53:14,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941316249] [2021-06-12 20:53:14,745 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:53:14,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:53:14,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:53:14,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:53:14,745 INFO L87 Difference]: Start difference. First operand 50 states and 89 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 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) [2021-06-12 20:53:15,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:53:15,259 INFO L93 Difference]: Finished difference Result 182 states and 297 transitions. [2021-06-12 20:53:15,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 20:53:15,260 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 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 21 [2021-06-12 20:53:15,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:53:15,260 INFO L225 Difference]: With dead ends: 182 [2021-06-12 20:53:15,260 INFO L226 Difference]: Without dead ends: 161 [2021-06-12 20:53:15,261 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 594.3ms TimeCoverageRelationStatistics Valid=338, Invalid=1732, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 20:53:15,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-06-12 20:53:15,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 55. [2021-06-12 20:53:15,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.9259259259259258) internal successors, (104), 54 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:15,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 104 transitions. [2021-06-12 20:53:15,264 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 104 transitions. Word has length 21 [2021-06-12 20:53:15,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:53:15,264 INFO L482 AbstractCegarLoop]: Abstraction has 55 states and 104 transitions. [2021-06-12 20:53:15,264 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 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) [2021-06-12 20:53:15,264 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 104 transitions. [2021-06-12 20:53:15,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:53:15,264 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:53:15,264 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:53:15,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:53:15,477 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:53:15,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:53:15,477 INFO L82 PathProgramCache]: Analyzing trace with hash 67788419, now seen corresponding path program 15 times [2021-06-12 20:53:15,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:53:15,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017146304] [2021-06-12 20:53:15,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:53:15,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:53:15,565 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:15,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:53:15,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017146304] [2021-06-12 20:53:15,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017146304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:15,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764285116] [2021-06-12 20:53:15,565 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:53:15,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:53:15,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:53:15,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:53:15,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:53:15,817 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:15,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764285116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:15,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:53:15,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-12 20:53:15,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603707916] [2021-06-12 20:53:15,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:53:15,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:53:15,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:53:15,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:53:15,818 INFO L87 Difference]: Start difference. First operand 55 states and 104 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 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) [2021-06-12 20:53:16,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:53:16,310 INFO L93 Difference]: Finished difference Result 143 states and 238 transitions. [2021-06-12 20:53:16,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 20:53:16,311 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 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 21 [2021-06-12 20:53:16,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:53:16,311 INFO L225 Difference]: With dead ends: 143 [2021-06-12 20:53:16,311 INFO L226 Difference]: Without dead ends: 90 [2021-06-12 20:53:16,312 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 523.8ms TimeCoverageRelationStatistics Valid=326, Invalid=1566, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 20:53:16,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-06-12 20:53:16,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 47. [2021-06-12 20:53:16,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.8043478260869565) internal successors, (83), 46 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:16,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 83 transitions. [2021-06-12 20:53:16,314 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 83 transitions. Word has length 21 [2021-06-12 20:53:16,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:53:16,314 INFO L482 AbstractCegarLoop]: Abstraction has 47 states and 83 transitions. [2021-06-12 20:53:16,314 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 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) [2021-06-12 20:53:16,314 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 83 transitions. [2021-06-12 20:53:16,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:53:16,314 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:53:16,314 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:53:16,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:53:16,525 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:53:16,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:53:16,525 INFO L82 PathProgramCache]: Analyzing trace with hash 770739301, now seen corresponding path program 16 times [2021-06-12 20:53:16,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:53:16,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622165772] [2021-06-12 20:53:16,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:53:16,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:53:16,612 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:16,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:53:16,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622165772] [2021-06-12 20:53:16,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622165772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:16,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105959006] [2021-06-12 20:53:16,612 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:53:16,635 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:53:16,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:53:16,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:53:16,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:53:16,843 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:16,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105959006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:16,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:53:16,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-12 20:53:16,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820569837] [2021-06-12 20:53:16,844 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:53:16,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:53:16,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:53:16,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:53:16,845 INFO L87 Difference]: Start difference. First operand 47 states and 83 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 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) [2021-06-12 20:53:17,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:53:17,154 INFO L93 Difference]: Finished difference Result 97 states and 165 transitions. [2021-06-12 20:53:17,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 20:53:17,154 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 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 21 [2021-06-12 20:53:17,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:53:17,154 INFO L225 Difference]: With dead ends: 97 [2021-06-12 20:53:17,155 INFO L226 Difference]: Without dead ends: 83 [2021-06-12 20:53:17,155 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 404.0ms TimeCoverageRelationStatistics Valid=216, Invalid=974, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 20:53:17,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-06-12 20:53:17,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 63. [2021-06-12 20:53:17,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.8387096774193548) internal successors, (114), 62 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:17,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 114 transitions. [2021-06-12 20:53:17,157 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 114 transitions. Word has length 21 [2021-06-12 20:53:17,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:53:17,157 INFO L482 AbstractCegarLoop]: Abstraction has 63 states and 114 transitions. [2021-06-12 20:53:17,157 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 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) [2021-06-12 20:53:17,157 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 114 transitions. [2021-06-12 20:53:17,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:53:17,158 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:53:17,158 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:53:17,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-06-12 20:53:17,373 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:53:17,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:53:17,373 INFO L82 PathProgramCache]: Analyzing trace with hash -241953231, now seen corresponding path program 17 times [2021-06-12 20:53:17,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:53:17,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820695674] [2021-06-12 20:53:17,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:53:17,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:53:17,459 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:17,459 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:53:17,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820695674] [2021-06-12 20:53:17,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820695674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:17,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907239584] [2021-06-12 20:53:17,460 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:53:17,482 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:53:17,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:53:17,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:53:17,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:53:17,706 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:17,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907239584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:17,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:53:17,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-12 20:53:17,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684834185] [2021-06-12 20:53:17,706 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:53:17,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:53:17,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:53:17,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:53:17,707 INFO L87 Difference]: Start difference. First operand 63 states and 114 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 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) [2021-06-12 20:53:18,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:53:18,189 INFO L93 Difference]: Finished difference Result 133 states and 227 transitions. [2021-06-12 20:53:18,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 20:53:18,189 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 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 21 [2021-06-12 20:53:18,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:53:18,190 INFO L225 Difference]: With dead ends: 133 [2021-06-12 20:53:18,190 INFO L226 Difference]: Without dead ends: 119 [2021-06-12 20:53:18,191 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 549.5ms TimeCoverageRelationStatistics Valid=250, Invalid=1310, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 20:53:18,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-06-12 20:53:18,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 67. [2021-06-12 20:53:18,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.9090909090909092) internal successors, (126), 66 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:18,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 126 transitions. [2021-06-12 20:53:18,193 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 126 transitions. Word has length 21 [2021-06-12 20:53:18,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:53:18,193 INFO L482 AbstractCegarLoop]: Abstraction has 67 states and 126 transitions. [2021-06-12 20:53:18,193 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 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) [2021-06-12 20:53:18,193 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 126 transitions. [2021-06-12 20:53:18,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:53:18,193 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:53:18,193 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:53:18,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-12 20:53:18,405 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:53:18,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:53:18,405 INFO L82 PathProgramCache]: Analyzing trace with hash -777183033, now seen corresponding path program 18 times [2021-06-12 20:53:18,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:53:18,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396211475] [2021-06-12 20:53:18,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:53:18,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:53:18,501 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:18,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:53:18,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396211475] [2021-06-12 20:53:18,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396211475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:18,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242616602] [2021-06-12 20:53:18,501 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:53:18,521 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:53:18,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:53:18,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:53:18,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:53:18,760 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:18,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242616602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:18,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:53:18,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-12 20:53:18,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816403749] [2021-06-12 20:53:18,761 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:53:18,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:53:18,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:53:18,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:53:18,761 INFO L87 Difference]: Start difference. First operand 67 states and 126 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 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) [2021-06-12 20:53:19,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:53:19,169 INFO L93 Difference]: Finished difference Result 111 states and 193 transitions. [2021-06-12 20:53:19,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 20:53:19,170 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 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 21 [2021-06-12 20:53:19,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:53:19,170 INFO L225 Difference]: With dead ends: 111 [2021-06-12 20:53:19,170 INFO L226 Difference]: Without dead ends: 73 [2021-06-12 20:53:19,171 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 501.0ms TimeCoverageRelationStatistics Valid=205, Invalid=1055, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 20:53:19,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-06-12 20:53:19,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 57. [2021-06-12 20:53:19,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.7678571428571428) internal successors, (99), 56 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:19,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 99 transitions. [2021-06-12 20:53:19,172 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 99 transitions. Word has length 21 [2021-06-12 20:53:19,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:53:19,172 INFO L482 AbstractCegarLoop]: Abstraction has 57 states and 99 transitions. [2021-06-12 20:53:19,172 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 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) [2021-06-12 20:53:19,173 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 99 transitions. [2021-06-12 20:53:19,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 20:53:19,173 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:53:19,173 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:53:19,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:53:19,377 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:53:19,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:53:19,377 INFO L82 PathProgramCache]: Analyzing trace with hash -2078233109, now seen corresponding path program 19 times [2021-06-12 20:53:19,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:53:19,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796049497] [2021-06-12 20:53:19,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:53:19,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:53:19,465 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-12 20:53:19,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:53:19,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796049497] [2021-06-12 20:53:19,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796049497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:19,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497993983] [2021-06-12 20:53:19,465 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:53:19,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:53:19,485 WARN L261 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 20:53:19,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:53:19,677 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:19,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497993983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:19,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:53:19,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-06-12 20:53:19,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295073042] [2021-06-12 20:53:19,677 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:53:19,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:53:19,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:53:19,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:53:19,678 INFO L87 Difference]: Start difference. First operand 57 states and 99 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:20,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:53:20,194 INFO L93 Difference]: Finished difference Result 109 states and 188 transitions. [2021-06-12 20:53:20,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 20:53:20,195 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 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 23 [2021-06-12 20:53:20,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:53:20,195 INFO L225 Difference]: With dead ends: 109 [2021-06-12 20:53:20,195 INFO L226 Difference]: Without dead ends: 95 [2021-06-12 20:53:20,196 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 550.7ms TimeCoverageRelationStatistics Valid=266, Invalid=1374, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 20:53:20,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-06-12 20:53:20,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 61. [2021-06-12 20:53:20,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.7833333333333334) internal successors, (107), 60 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:20,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 107 transitions. [2021-06-12 20:53:20,198 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 107 transitions. Word has length 23 [2021-06-12 20:53:20,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:53:20,198 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 107 transitions. [2021-06-12 20:53:20,198 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:20,198 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 107 transitions. [2021-06-12 20:53:20,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 20:53:20,198 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:53:20,199 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:53:20,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-12 20:53:20,416 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:53:20,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:53:20,416 INFO L82 PathProgramCache]: Analyzing trace with hash 1330935907, now seen corresponding path program 20 times [2021-06-12 20:53:20,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:53:20,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837061638] [2021-06-12 20:53:20,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:53:20,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:53:20,497 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 20:53:20,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:53:20,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837061638] [2021-06-12 20:53:20,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837061638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:20,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957498984] [2021-06-12 20:53:20,498 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:53:20,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:53:20,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:53:20,522 WARN L261 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 20:53:20,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:53:20,747 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:20,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957498984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:20,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:53:20,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-06-12 20:53:20,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507509113] [2021-06-12 20:53:20,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:53:20,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:53:20,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:53:20,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:53:20,749 INFO L87 Difference]: Start difference. First operand 61 states and 107 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:21,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:53:21,255 INFO L93 Difference]: Finished difference Result 120 states and 210 transitions. [2021-06-12 20:53:21,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 20:53:21,256 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 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 23 [2021-06-12 20:53:21,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:53:21,256 INFO L225 Difference]: With dead ends: 120 [2021-06-12 20:53:21,256 INFO L226 Difference]: Without dead ends: 106 [2021-06-12 20:53:21,257 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 543.5ms TimeCoverageRelationStatistics Valid=254, Invalid=1386, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 20:53:21,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-06-12 20:53:21,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 61. [2021-06-12 20:53:21,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.8) internal successors, (108), 60 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:21,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 108 transitions. [2021-06-12 20:53:21,259 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 108 transitions. Word has length 23 [2021-06-12 20:53:21,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:53:21,259 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 108 transitions. [2021-06-12 20:53:21,259 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:21,259 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 108 transitions. [2021-06-12 20:53:21,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 20:53:21,260 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:53:21,260 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:53:21,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:53:21,469 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:53:21,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:53:21,469 INFO L82 PathProgramCache]: Analyzing trace with hash 318243375, now seen corresponding path program 21 times [2021-06-12 20:53:21,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:53:21,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909776023] [2021-06-12 20:53:21,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:53:21,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:53:21,555 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 20:53:21,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:53:21,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909776023] [2021-06-12 20:53:21,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909776023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:21,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908152982] [2021-06-12 20:53:21,555 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:53:21,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:53:21,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:53:21,576 WARN L261 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 20:53:21,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:53:21,822 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:21,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908152982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:21,822 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:53:21,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-06-12 20:53:21,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591647990] [2021-06-12 20:53:21,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:53:21,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:53:21,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:53:21,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:53:21,824 INFO L87 Difference]: Start difference. First operand 61 states and 108 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:22,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:53:22,591 INFO L93 Difference]: Finished difference Result 116 states and 202 transitions. [2021-06-12 20:53:22,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 20:53:22,592 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 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 23 [2021-06-12 20:53:22,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:53:22,592 INFO L225 Difference]: With dead ends: 116 [2021-06-12 20:53:22,592 INFO L226 Difference]: Without dead ends: 102 [2021-06-12 20:53:22,593 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 744 ImplicationChecksByTransitivity, 774.7ms TimeCoverageRelationStatistics Valid=406, Invalid=2246, Unknown=0, NotChecked=0, Total=2652 [2021-06-12 20:53:22,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-06-12 20:53:22,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 59. [2021-06-12 20:53:22,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.7586206896551724) internal successors, (102), 58 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:22,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 102 transitions. [2021-06-12 20:53:22,595 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 102 transitions. Word has length 23 [2021-06-12 20:53:22,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:53:22,595 INFO L482 AbstractCegarLoop]: Abstraction has 59 states and 102 transitions. [2021-06-12 20:53:22,595 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:22,596 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 102 transitions. [2021-06-12 20:53:22,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 20:53:22,596 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:53:22,596 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:53:22,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-12 20:53:22,809 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:53:22,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:53:22,809 INFO L82 PathProgramCache]: Analyzing trace with hash -216986427, now seen corresponding path program 22 times [2021-06-12 20:53:22,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:53:22,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208645992] [2021-06-12 20:53:22,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:53:22,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:53:22,904 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 20:53:22,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:53:22,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208645992] [2021-06-12 20:53:22,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208645992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:22,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698174879] [2021-06-12 20:53:22,904 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:53:22,938 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:53:22,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:53:22,939 WARN L261 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 20:53:22,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:53:23,125 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:23,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698174879] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:23,126 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:53:23,126 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-06-12 20:53:23,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213967745] [2021-06-12 20:53:23,126 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:53:23,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:53:23,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:53:23,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:53:23,127 INFO L87 Difference]: Start difference. First operand 59 states and 102 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:23,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:53:23,618 INFO L93 Difference]: Finished difference Result 92 states and 163 transitions. [2021-06-12 20:53:23,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 20:53:23,618 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 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 23 [2021-06-12 20:53:23,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:53:23,618 INFO L225 Difference]: With dead ends: 92 [2021-06-12 20:53:23,618 INFO L226 Difference]: Without dead ends: 0 [2021-06-12 20:53:23,618 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 547.4ms TimeCoverageRelationStatistics Valid=260, Invalid=1380, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 20:53:23,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-06-12 20:53:23,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-06-12 20:53:23,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:23,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-06-12 20:53:23,619 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 23 [2021-06-12 20:53:23,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:53:23,619 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-06-12 20:53:23,619 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:23,619 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-06-12 20:53:23,619 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-12 20:53:23,819 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-06-12 20:53:23,821 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-12 20:53:23,823 INFO L202 PluginConnector]: Adding new model figure1-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.06 08:53:23 BasicIcfg [2021-06-12 20:53:23,823 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-12 20:53:23,823 INFO L168 Benchmark]: Toolchain (without parser) took 26725.30 ms. Allocated memory was 189.8 MB in the beginning and 337.6 MB in the end (delta: 147.8 MB). Free memory was 170.8 MB in the beginning and 320.0 MB in the end (delta: -149.3 MB). Peak memory consumption was 200.5 MB. Max. memory is 8.0 GB. [2021-06-12 20:53:23,823 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 189.8 MB. Free memory is still 171.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-06-12 20:53:23,824 INFO L168 Benchmark]: Boogie Procedure Inliner took 21.88 ms. Allocated memory is still 189.8 MB. Free memory was 170.8 MB in the beginning and 169.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-06-12 20:53:23,824 INFO L168 Benchmark]: Boogie Preprocessor took 11.43 ms. Allocated memory is still 189.8 MB. Free memory was 169.3 MB in the beginning and 168.4 MB in the end (delta: 912.8 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-06-12 20:53:23,824 INFO L168 Benchmark]: RCFGBuilder took 234.19 ms. Allocated memory is still 189.8 MB. Free memory was 168.4 MB in the beginning and 156.7 MB in the end (delta: 11.6 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2021-06-12 20:53:23,824 INFO L168 Benchmark]: TraceAbstraction took 26453.03 ms. Allocated memory was 189.8 MB in the beginning and 337.6 MB in the end (delta: 147.8 MB). Free memory was 156.1 MB in the beginning and 320.0 MB in the end (delta: -163.9 MB). Peak memory consumption was 185.8 MB. Max. memory is 8.0 GB. [2021-06-12 20:53:23,824 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 0.12 ms. Allocated memory is still 189.8 MB. Free memory is still 171.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 21.88 ms. Allocated memory is still 189.8 MB. Free memory was 170.8 MB in the beginning and 169.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 11.43 ms. Allocated memory is still 189.8 MB. Free memory was 169.3 MB in the beginning and 168.4 MB in the end (delta: 912.8 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 234.19 ms. Allocated memory is still 189.8 MB. Free memory was 168.4 MB in the beginning and 156.7 MB in the end (delta: 11.6 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 26453.03 ms. Allocated memory was 189.8 MB in the beginning and 337.6 MB in the end (delta: 147.8 MB). Free memory was 156.1 MB in the beginning and 320.0 MB in the end (delta: -163.9 MB). Peak memory consumption was 185.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 51]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 32 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 26336.3ms, OverallIterations: 28, TraceHistogramMax: 3, EmptinessCheckTime: 18.8ms, AutomataDifference: 11357.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 18.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 546 SDtfs, 3085 SDslu, 3682 SDs, 0 SdLazy, 7001 SolverSat, 414 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2759.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1218 GetRequests, 289 SyntacticMatches, 26 SemanticMatches, 903 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8019 ImplicationChecksByTransitivity, 13184.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=67occurred in iteration=10, InterpolantAutomatonStates: 642, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 117.0ms AutomataMinimizationTime, 28 MinimizatonAttempts, 848 StatesRemovedByMinimization, 27 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 68.0ms SsaConstructionTime, 270.8ms SatisfiabilityAnalysisTime, 8203.6ms InterpolantComputationTime, 1078 NumberOfCodeBlocks, 1078 NumberOfCodeBlocksAsserted, 82 NumberOfCheckSat, 1024 ConstructedInterpolants, 0 QuantifiedInterpolants, 12797 SizeOfPredicates, 130 NumberOfNonLiveVariables, 1085 ConjunctsInSsa, 496 ConjunctsInUnsatCore, 54 InterpolantComputations, 2 PerfectInterpolantSequences, 14/226 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...