/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/min-max-inc.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a47a088281b0b97d17910950432b7c5b5bc3adeb-a47a088 [2021-07-13 20:03:43,275 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-13 20:03:43,276 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-13 20:03:43,310 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-13 20:03:43,327 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-07-13 20:03:43,327 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-07-13 20:03:43,328 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-07-13 20:03:43,328 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-07-13 20:03:43,329 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-07-13 20:03:43,329 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-07-13 20:03:43,330 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-07-13 20:03:43,330 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-07-13 20:03:43,330 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-07-13 20:03:43,330 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-07-13 20:03:43,331 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-07-13 20:03:43,339 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 [2021-07-13 20:03:43,361 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-13 20:03:43,361 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-13 20:03:43,361 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-13 20:03:43,361 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-13 20:03:43,362 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-13 20:03:43,362 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-13 20:03:43,362 INFO L138 SettingsManager]: * Use SBE=true [2021-07-13 20:03:43,363 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-13 20:03:43,363 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-13 20:03:43,363 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-13 20:03:43,363 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-13 20:03:43,363 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-13 20:03:43,363 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-13 20:03:43,363 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-13 20:03:43,363 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-13 20:03:43,363 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-13 20:03:43,363 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-13 20:03:43,364 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-13 20:03:43,364 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-13 20:03:43,364 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-13 20:03:43,364 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-13 20:03:43,364 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-13 20:03:43,364 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-13 20:03:43,364 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-13 20:03:43,364 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-13 20:03:43,364 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-13 20:03:43,364 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-13 20:03:43,365 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-13 20:03:43,365 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-13 20:03:43,365 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-13 20:03:43,372 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-13 20:03:43,372 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-13 20:03:43,607 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-13 20:03:43,622 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-13 20:03:43,624 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-13 20:03:43,624 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-13 20:03:43,625 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-13 20:03:43,626 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/min-max-inc.wvr.bpl [2021-07-13 20:03:43,626 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/min-max-inc.wvr.bpl' [2021-07-13 20:03:43,659 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-13 20:03:43,660 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-13 20:03:43,661 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-13 20:03:43,662 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-13 20:03:43,662 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-13 20:03:43,670 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:03:43" (1/1) ... [2021-07-13 20:03:43,676 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:03:43" (1/1) ... [2021-07-13 20:03:43,682 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-13 20:03:43,683 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-13 20:03:43,684 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-13 20:03:43,685 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-13 20:03:43,691 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:03:43" (1/1) ... [2021-07-13 20:03:43,692 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:03:43" (1/1) ... [2021-07-13 20:03:43,693 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:03:43" (1/1) ... [2021-07-13 20:03:43,693 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:03:43" (1/1) ... [2021-07-13 20:03:43,695 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:03:43" (1/1) ... [2021-07-13 20:03:43,699 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:03:43" (1/1) ... [2021-07-13 20:03:43,700 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:03:43" (1/1) ... [2021-07-13 20:03:43,701 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-13 20:03:43,702 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-13 20:03:43,702 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-13 20:03:43,702 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-13 20:03:43,703 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:03:43" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-13 20:03:43,759 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-13 20:03:43,759 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-13 20:03:43,759 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-13 20:03:43,759 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-13 20:03:43,759 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-13 20:03:43,759 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-13 20:03:43,759 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-13 20:03:43,759 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-13 20:03:43,759 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-13 20:03:43,760 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-07-13 20:03:43,760 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-07-13 20:03:43,760 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-07-13 20:03:43,760 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-07-13 20:03:43,760 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-07-13 20:03:43,760 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-07-13 20:03:43,761 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-13 20:03:43,914 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-13 20:03:43,914 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-07-13 20:03:43,915 INFO L202 PluginConnector]: Adding new model min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 08:03:43 BoogieIcfgContainer [2021-07-13 20:03:43,915 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-13 20:03:43,917 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-13 20:03:43,917 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-13 20:03:43,919 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-13 20:03:43,919 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:03:43" (1/2) ... [2021-07-13 20:03:43,919 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34c47559 and model type min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 08:03:43, skipping insertion in model container [2021-07-13 20:03:43,919 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 08:03:43" (2/2) ... [2021-07-13 20:03:43,920 INFO L111 eAbstractionObserver]: Analyzing ICFG min-max-inc.wvr.bpl [2021-07-13 20:03:43,924 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-13 20:03:43,924 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-13 20:03:43,924 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-13 20:03:43,924 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-13 20:03:43,971 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-07-13 20:03:43,986 INFO L255 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-07-13 20:03:43,999 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-13 20:03:43,999 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-13 20:03:43,999 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-13 20:03:43,999 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-13 20:03:43,999 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-13 20:03:43,999 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-13 20:03:43,999 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-13 20:03:43,999 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-13 20:03:44,019 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 45 places, 35 transitions, 102 flow [2021-07-13 20:03:44,078 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 710 states, 709 states have (on average 3.6473906911142455) internal successors, (2586), 709 states have internal predecessors, (2586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:44,081 INFO L276 IsEmpty]: Start isEmpty. Operand has 710 states, 709 states have (on average 3.6473906911142455) internal successors, (2586), 709 states have internal predecessors, (2586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:44,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:03:44,099 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:03:44,100 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:03:44,100 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:03:44,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:03:44,106 INFO L82 PathProgramCache]: Analyzing trace with hash -1581359210, now seen corresponding path program 1 times [2021-07-13 20:03:44,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:03:44,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268662705] [2021-07-13 20:03:44,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:03:44,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:03:44,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:44,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:03:44,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268662705] [2021-07-13 20:03:44,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268662705] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:03:44,293 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:03:44,293 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-13 20:03:44,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193521196] [2021-07-13 20:03:44,296 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 20:03:44,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:03:44,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 20:03:44,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:03:44,307 INFO L87 Difference]: Start difference. First operand has 710 states, 709 states have (on average 3.6473906911142455) internal successors, (2586), 709 states have internal predecessors, (2586), 0 states have call successors, (0), 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 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:44,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:03:44,412 INFO L93 Difference]: Finished difference Result 3229 states and 11601 transitions. [2021-07-13 20:03:44,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 20:03:44,413 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 20:03:44,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:03:44,438 INFO L225 Difference]: With dead ends: 3229 [2021-07-13 20:03:44,438 INFO L226 Difference]: Without dead ends: 2179 [2021-07-13 20:03:44,439 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 49.7ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:03:44,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2179 states. [2021-07-13 20:03:44,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2179 to 955. [2021-07-13 20:03:44,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 955 states, 954 states have (on average 3.611111111111111) internal successors, (3445), 954 states have internal predecessors, (3445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:44,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 955 states to 955 states and 3445 transitions. [2021-07-13 20:03:44,540 INFO L78 Accepts]: Start accepts. Automaton has 955 states and 3445 transitions. Word has length 23 [2021-07-13 20:03:44,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:03:44,541 INFO L482 AbstractCegarLoop]: Abstraction has 955 states and 3445 transitions. [2021-07-13 20:03:44,541 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:44,542 INFO L276 IsEmpty]: Start isEmpty. Operand 955 states and 3445 transitions. [2021-07-13 20:03:44,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:03:44,556 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:03:44,556 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:03:44,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-13 20:03:44,556 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:03:44,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:03:44,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1499988984, now seen corresponding path program 2 times [2021-07-13 20:03:44,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:03:44,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768019794] [2021-07-13 20:03:44,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:03:44,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:03:44,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:44,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:03:44,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768019794] [2021-07-13 20:03:44,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768019794] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:03:44,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:03:44,603 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 20:03:44,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001518073] [2021-07-13 20:03:44,604 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 20:03:44,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:03:44,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 20:03:44,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 20:03:44,605 INFO L87 Difference]: Start difference. First operand 955 states and 3445 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:44,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:03:44,629 INFO L93 Difference]: Finished difference Result 1206 states and 4309 transitions. [2021-07-13 20:03:44,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 20:03:44,629 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 20:03:44,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:03:44,634 INFO L225 Difference]: With dead ends: 1206 [2021-07-13 20:03:44,634 INFO L226 Difference]: Without dead ends: 859 [2021-07-13 20:03:44,635 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:03:44,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 859 states. [2021-07-13 20:03:44,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 859 to 859. [2021-07-13 20:03:44,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 859 states, 858 states have (on average 3.5442890442890445) internal successors, (3041), 858 states have internal predecessors, (3041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:44,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 859 states to 859 states and 3041 transitions. [2021-07-13 20:03:44,657 INFO L78 Accepts]: Start accepts. Automaton has 859 states and 3041 transitions. Word has length 23 [2021-07-13 20:03:44,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:03:44,657 INFO L482 AbstractCegarLoop]: Abstraction has 859 states and 3041 transitions. [2021-07-13 20:03:44,658 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:44,658 INFO L276 IsEmpty]: Start isEmpty. Operand 859 states and 3041 transitions. [2021-07-13 20:03:44,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:03:44,660 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:03:44,661 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:03:44,661 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-13 20:03:44,661 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:03:44,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:03:44,662 INFO L82 PathProgramCache]: Analyzing trace with hash 2060589364, now seen corresponding path program 3 times [2021-07-13 20:03:44,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:03:44,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394929528] [2021-07-13 20:03:44,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:03:44,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:03:44,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:44,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:03:44,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394929528] [2021-07-13 20:03:44,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394929528] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:03:44,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:03:44,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-13 20:03:44,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632071306] [2021-07-13 20:03:44,704 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 20:03:44,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:03:44,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 20:03:44,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:03:44,704 INFO L87 Difference]: Start difference. First operand 859 states and 3041 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:44,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:03:44,790 INFO L93 Difference]: Finished difference Result 3289 states and 11673 transitions. [2021-07-13 20:03:44,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 20:03:44,791 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 20:03:44,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:03:44,803 INFO L225 Difference]: With dead ends: 3289 [2021-07-13 20:03:44,804 INFO L226 Difference]: Without dead ends: 2391 [2021-07-13 20:03:44,804 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 26.4ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:03:44,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2391 states. [2021-07-13 20:03:44,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2391 to 910. [2021-07-13 20:03:44,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 910 states, 909 states have (on average 3.553355335533553) internal successors, (3230), 909 states have internal predecessors, (3230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:44,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 910 states to 910 states and 3230 transitions. [2021-07-13 20:03:44,836 INFO L78 Accepts]: Start accepts. Automaton has 910 states and 3230 transitions. Word has length 23 [2021-07-13 20:03:44,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:03:44,836 INFO L482 AbstractCegarLoop]: Abstraction has 910 states and 3230 transitions. [2021-07-13 20:03:44,836 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:44,837 INFO L276 IsEmpty]: Start isEmpty. Operand 910 states and 3230 transitions. [2021-07-13 20:03:44,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:03:44,839 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:03:44,839 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:03:44,839 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-13 20:03:44,839 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:03:44,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:03:44,840 INFO L82 PathProgramCache]: Analyzing trace with hash -375854000, now seen corresponding path program 4 times [2021-07-13 20:03:44,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:03:44,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773860271] [2021-07-13 20:03:44,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:03:44,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:03:44,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:44,862 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:03:44,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773860271] [2021-07-13 20:03:44,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773860271] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:03:44,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:03:44,862 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 20:03:44,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132163191] [2021-07-13 20:03:44,863 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 20:03:44,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:03:44,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 20:03:44,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 20:03:44,863 INFO L87 Difference]: Start difference. First operand 910 states and 3230 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:44,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:03:44,879 INFO L93 Difference]: Finished difference Result 1081 states and 3814 transitions. [2021-07-13 20:03:44,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 20:03:44,879 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 20:03:44,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:03:44,883 INFO L225 Difference]: With dead ends: 1081 [2021-07-13 20:03:44,883 INFO L226 Difference]: Without dead ends: 830 [2021-07-13 20:03:44,883 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:03:44,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2021-07-13 20:03:44,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 830. [2021-07-13 20:03:44,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 830 states, 829 states have (on average 3.4861278648974667) internal successors, (2890), 829 states have internal predecessors, (2890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:44,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 2890 transitions. [2021-07-13 20:03:44,914 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 2890 transitions. Word has length 23 [2021-07-13 20:03:44,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:03:44,915 INFO L482 AbstractCegarLoop]: Abstraction has 830 states and 2890 transitions. [2021-07-13 20:03:44,915 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:44,915 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 2890 transitions. [2021-07-13 20:03:44,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:03:44,917 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:03:44,917 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:03:44,917 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-07-13 20:03:44,917 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:03:44,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:03:44,918 INFO L82 PathProgramCache]: Analyzing trace with hash 270626710, now seen corresponding path program 1 times [2021-07-13 20:03:44,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:03:44,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906470734] [2021-07-13 20:03:44,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:03:44,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:03:44,984 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:44,985 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:03:44,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906470734] [2021-07-13 20:03:44,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906470734] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:44,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722091645] [2021-07-13 20:03:44,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:03:45,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:03:45,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 4 conjunts are in the unsatisfiable core [2021-07-13 20:03:45,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:03:45,127 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:45,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722091645] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:45,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:03:45,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-07-13 20:03:45,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778878841] [2021-07-13 20:03:45,128 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 20:03:45,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:03:45,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 20:03:45,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-07-13 20:03:45,129 INFO L87 Difference]: Start difference. First operand 830 states and 2890 transitions. Second operand has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:45,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:03:45,186 INFO L93 Difference]: Finished difference Result 1914 states and 6600 transitions. [2021-07-13 20:03:45,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-13 20:03:45,187 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:03:45,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:03:45,195 INFO L225 Difference]: With dead ends: 1914 [2021-07-13 20:03:45,195 INFO L226 Difference]: Without dead ends: 1914 [2021-07-13 20:03:45,196 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 39.7ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-07-13 20:03:45,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1914 states. [2021-07-13 20:03:45,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1914 to 1087. [2021-07-13 20:03:45,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1087 states, 1086 states have (on average 3.603130755064457) internal successors, (3913), 1086 states have internal predecessors, (3913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:45,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1087 states to 1087 states and 3913 transitions. [2021-07-13 20:03:45,228 INFO L78 Accepts]: Start accepts. Automaton has 1087 states and 3913 transitions. Word has length 25 [2021-07-13 20:03:45,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:03:45,228 INFO L482 AbstractCegarLoop]: Abstraction has 1087 states and 3913 transitions. [2021-07-13 20:03:45,228 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:45,228 INFO L276 IsEmpty]: Start isEmpty. Operand 1087 states and 3913 transitions. [2021-07-13 20:03:45,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:03:45,230 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:03:45,230 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:03:45,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:03:45,441 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:03:45,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:03:45,441 INFO L82 PathProgramCache]: Analyzing trace with hash -524449864, now seen corresponding path program 1 times [2021-07-13 20:03:45,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:03:45,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55418626] [2021-07-13 20:03:45,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:03:45,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:03:45,462 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:45,462 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:03:45,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55418626] [2021-07-13 20:03:45,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55418626] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:03:45,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:03:45,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 20:03:45,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641368769] [2021-07-13 20:03:45,462 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 20:03:45,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:03:45,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 20:03:45,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 20:03:45,463 INFO L87 Difference]: Start difference. First operand 1087 states and 3913 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:45,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:03:45,496 INFO L93 Difference]: Finished difference Result 1486 states and 5095 transitions. [2021-07-13 20:03:45,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 20:03:45,500 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:03:45,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:03:45,506 INFO L225 Difference]: With dead ends: 1486 [2021-07-13 20:03:45,507 INFO L226 Difference]: Without dead ends: 1456 [2021-07-13 20:03:45,507 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:03:45,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1456 states. [2021-07-13 20:03:45,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1456 to 1266. [2021-07-13 20:03:45,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1266 states, 1265 states have (on average 3.5177865612648223) internal successors, (4450), 1265 states have internal predecessors, (4450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:45,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1266 states to 1266 states and 4450 transitions. [2021-07-13 20:03:45,538 INFO L78 Accepts]: Start accepts. Automaton has 1266 states and 4450 transitions. Word has length 25 [2021-07-13 20:03:45,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:03:45,538 INFO L482 AbstractCegarLoop]: Abstraction has 1266 states and 4450 transitions. [2021-07-13 20:03:45,538 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:45,538 INFO L276 IsEmpty]: Start isEmpty. Operand 1266 states and 4450 transitions. [2021-07-13 20:03:45,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:03:45,542 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:03:45,543 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:03:45,543 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-07-13 20:03:45,543 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:03:45,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:03:45,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1724816056, now seen corresponding path program 1 times [2021-07-13 20:03:45,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:03:45,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117657301] [2021-07-13 20:03:45,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:03:45,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:03:45,580 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:45,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:03:45,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117657301] [2021-07-13 20:03:45,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117657301] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:03:45,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:03:45,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 20:03:45,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729042826] [2021-07-13 20:03:45,580 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 20:03:45,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:03:45,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 20:03:45,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 20:03:45,581 INFO L87 Difference]: Start difference. First operand 1266 states and 4450 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:45,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:03:45,621 INFO L93 Difference]: Finished difference Result 1766 states and 6108 transitions. [2021-07-13 20:03:45,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 20:03:45,622 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:03:45,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:03:45,630 INFO L225 Difference]: With dead ends: 1766 [2021-07-13 20:03:45,630 INFO L226 Difference]: Without dead ends: 1644 [2021-07-13 20:03:45,632 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:03:45,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1644 states. [2021-07-13 20:03:45,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1644 to 1367. [2021-07-13 20:03:45,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1367 states, 1366 states have (on average 3.5439238653001466) internal successors, (4841), 1366 states have internal predecessors, (4841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:45,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1367 states to 1367 states and 4841 transitions. [2021-07-13 20:03:45,663 INFO L78 Accepts]: Start accepts. Automaton has 1367 states and 4841 transitions. Word has length 25 [2021-07-13 20:03:45,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:03:45,664 INFO L482 AbstractCegarLoop]: Abstraction has 1367 states and 4841 transitions. [2021-07-13 20:03:45,664 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:45,664 INFO L276 IsEmpty]: Start isEmpty. Operand 1367 states and 4841 transitions. [2021-07-13 20:03:45,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:03:45,668 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:03:45,669 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:03:45,669 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-07-13 20:03:45,669 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:03:45,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:03:45,670 INFO L82 PathProgramCache]: Analyzing trace with hash -5183016, now seen corresponding path program 2 times [2021-07-13 20:03:45,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:03:45,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052934424] [2021-07-13 20:03:45,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:03:45,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:03:45,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:45,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:03:45,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052934424] [2021-07-13 20:03:45,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052934424] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:45,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935278394] [2021-07-13 20:03:45,753 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 [2021-07-13 20:03:45,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:03:45,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:03:45,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 3 conjunts are in the unsatisfiable core [2021-07-13 20:03:45,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:03:45,862 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:45,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935278394] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:45,863 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:03:45,863 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3] total 8 [2021-07-13 20:03:45,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727042097] [2021-07-13 20:03:45,863 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 20:03:45,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:03:45,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 20:03:45,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:03:45,866 INFO L87 Difference]: Start difference. First operand 1367 states and 4841 transitions. Second operand has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:46,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:03:46,538 INFO L93 Difference]: Finished difference Result 6173 states and 21367 transitions. [2021-07-13 20:03:46,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 20:03:46,538 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:03:46,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:03:46,565 INFO L225 Difference]: With dead ends: 6173 [2021-07-13 20:03:46,565 INFO L226 Difference]: Without dead ends: 3187 [2021-07-13 20:03:46,566 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 385.9ms TimeCoverageRelationStatistics Valid=523, Invalid=1733, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 20:03:46,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3187 states. [2021-07-13 20:03:46,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3187 to 1397. [2021-07-13 20:03:46,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1397 states, 1396 states have (on average 3.4978510028653296) internal successors, (4883), 1396 states have internal predecessors, (4883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:46,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1397 states to 1397 states and 4883 transitions. [2021-07-13 20:03:46,611 INFO L78 Accepts]: Start accepts. Automaton has 1397 states and 4883 transitions. Word has length 25 [2021-07-13 20:03:46,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:03:46,611 INFO L482 AbstractCegarLoop]: Abstraction has 1397 states and 4883 transitions. [2021-07-13 20:03:46,612 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:46,612 INFO L276 IsEmpty]: Start isEmpty. Operand 1397 states and 4883 transitions. [2021-07-13 20:03:46,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:03:46,614 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:03:46,615 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:03:46,829 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:03:46,829 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:03:46,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:03:46,829 INFO L82 PathProgramCache]: Analyzing trace with hash 566728726, now seen corresponding path program 2 times [2021-07-13 20:03:46,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:03:46,830 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035791959] [2021-07-13 20:03:46,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:03:46,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:03:46,851 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:46,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:03:46,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035791959] [2021-07-13 20:03:46,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035791959] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:03:46,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:03:46,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 20:03:46,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069924637] [2021-07-13 20:03:46,852 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 20:03:46,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:03:46,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 20:03:46,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 20:03:46,853 INFO L87 Difference]: Start difference. First operand 1397 states and 4883 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:46,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:03:46,887 INFO L93 Difference]: Finished difference Result 1523 states and 5204 transitions. [2021-07-13 20:03:46,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 20:03:46,888 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:03:46,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:03:46,892 INFO L225 Difference]: With dead ends: 1523 [2021-07-13 20:03:46,892 INFO L226 Difference]: Without dead ends: 1424 [2021-07-13 20:03:46,892 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:03:46,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1424 states. [2021-07-13 20:03:46,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1424 to 1302. [2021-07-13 20:03:46,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1302 states, 1301 states have (on average 3.504227517294389) internal successors, (4559), 1301 states have internal predecessors, (4559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:46,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1302 states to 1302 states and 4559 transitions. [2021-07-13 20:03:46,917 INFO L78 Accepts]: Start accepts. Automaton has 1302 states and 4559 transitions. Word has length 25 [2021-07-13 20:03:46,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:03:46,917 INFO L482 AbstractCegarLoop]: Abstraction has 1302 states and 4559 transitions. [2021-07-13 20:03:46,917 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:46,917 INFO L276 IsEmpty]: Start isEmpty. Operand 1302 states and 4559 transitions. [2021-07-13 20:03:46,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:03:46,919 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:03:46,919 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:03:46,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-07-13 20:03:46,920 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:03:46,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:03:46,920 INFO L82 PathProgramCache]: Analyzing trace with hash 1313441110, now seen corresponding path program 3 times [2021-07-13 20:03:46,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:03:46,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008859788] [2021-07-13 20:03:46,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:03:46,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:03:46,943 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:46,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:03:46,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008859788] [2021-07-13 20:03:46,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008859788] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:46,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346621740] [2021-07-13 20:03:46,943 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 [2021-07-13 20:03:46,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 20:03:46,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:03:46,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 3 conjunts are in the unsatisfiable core [2021-07-13 20:03:46,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:03:47,021 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:47,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346621740] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:47,022 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:03:47,022 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-07-13 20:03:47,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728738783] [2021-07-13 20:03:47,022 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 20:03:47,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:03:47,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 20:03:47,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-07-13 20:03:47,023 INFO L87 Difference]: Start difference. First operand 1302 states and 4559 transitions. Second operand has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:47,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:03:47,066 INFO L93 Difference]: Finished difference Result 1384 states and 4841 transitions. [2021-07-13 20:03:47,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-13 20:03:47,066 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:03:47,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:03:47,070 INFO L225 Difference]: With dead ends: 1384 [2021-07-13 20:03:47,070 INFO L226 Difference]: Without dead ends: 1282 [2021-07-13 20:03:47,070 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 16.7ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-07-13 20:03:47,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1282 states. [2021-07-13 20:03:47,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1282 to 1044. [2021-07-13 20:03:47,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1044 states, 1043 states have (on average 3.5167785234899327) internal successors, (3668), 1043 states have internal predecessors, (3668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:47,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1044 states to 1044 states and 3668 transitions. [2021-07-13 20:03:47,096 INFO L78 Accepts]: Start accepts. Automaton has 1044 states and 3668 transitions. Word has length 25 [2021-07-13 20:03:47,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:03:47,097 INFO L482 AbstractCegarLoop]: Abstraction has 1044 states and 3668 transitions. [2021-07-13 20:03:47,097 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:47,097 INFO L276 IsEmpty]: Start isEmpty. Operand 1044 states and 3668 transitions. [2021-07-13 20:03:47,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 20:03:47,099 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:03:47,100 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:03:47,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-07-13 20:03:47,313 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:03:47,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:03:47,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1224692314, now seen corresponding path program 1 times [2021-07-13 20:03:47,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:03:47,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638045369] [2021-07-13 20:03:47,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:03:47,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:03:47,455 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:47,456 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:03:47,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638045369] [2021-07-13 20:03:47,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638045369] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:47,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020351195] [2021-07-13 20:03:47,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:03:47,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:03:47,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 20:03:47,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:03:47,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2021-07-13 20:03:47,556 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:03:47,559 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:03:47,559 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:03:47,559 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:11 [2021-07-13 20:03:47,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 20:03:47,601 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:03:47,602 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:03:47,603 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:03:47,603 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:5 [2021-07-13 20:03:47,621 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:47,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020351195] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:47,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:03:47,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-07-13 20:03:47,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18165288] [2021-07-13 20:03:47,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:03:47,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:03:47,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:03:47,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:03:47,623 INFO L87 Difference]: Start difference. First operand 1044 states and 3668 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 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) [2021-07-13 20:03:47,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:03:47,779 INFO L93 Difference]: Finished difference Result 2466 states and 8751 transitions. [2021-07-13 20:03:47,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 20:03:47,779 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 20:03:47,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:03:47,783 INFO L225 Difference]: With dead ends: 2466 [2021-07-13 20:03:47,783 INFO L226 Difference]: Without dead ends: 1631 [2021-07-13 20:03:47,784 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 136.1ms TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:03:47,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1631 states. [2021-07-13 20:03:47,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1631 to 1283. [2021-07-13 20:03:47,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1283 states, 1282 states have (on average 3.4672386895475817) internal successors, (4445), 1282 states have internal predecessors, (4445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:47,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1283 states to 1283 states and 4445 transitions. [2021-07-13 20:03:47,811 INFO L78 Accepts]: Start accepts. Automaton has 1283 states and 4445 transitions. Word has length 29 [2021-07-13 20:03:47,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:03:47,811 INFO L482 AbstractCegarLoop]: Abstraction has 1283 states and 4445 transitions. [2021-07-13 20:03:47,811 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 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) [2021-07-13 20:03:47,811 INFO L276 IsEmpty]: Start isEmpty. Operand 1283 states and 4445 transitions. [2021-07-13 20:03:47,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 20:03:47,813 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:03:47,813 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:03:48,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:03:48,032 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:03:48,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:03:48,033 INFO L82 PathProgramCache]: Analyzing trace with hash -22453128, now seen corresponding path program 2 times [2021-07-13 20:03:48,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:03:48,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979118773] [2021-07-13 20:03:48,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:03:48,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:03:48,143 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:48,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:03:48,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979118773] [2021-07-13 20:03:48,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979118773] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:48,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431242713] [2021-07-13 20:03:48,144 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 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 [2021-07-13 20:03:48,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:03:48,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:03:48,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 20:03:48,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:03:48,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 7 [2021-07-13 20:03:48,209 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:03:48,211 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:03:48,212 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:03:48,212 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:7 [2021-07-13 20:03:48,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 20:03:48,270 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:03:48,271 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:03:48,271 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:03:48,271 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:3 [2021-07-13 20:03:48,284 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:48,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431242713] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:48,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:03:48,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 20:03:48,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206930729] [2021-07-13 20:03:48,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:03:48,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:03:48,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:03:48,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:03:48,285 INFO L87 Difference]: Start difference. First operand 1283 states and 4445 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:48,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:03:48,567 INFO L93 Difference]: Finished difference Result 2852 states and 10126 transitions. [2021-07-13 20:03:48,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 20:03:48,567 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 20:03:48,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:03:48,570 INFO L225 Difference]: With dead ends: 2852 [2021-07-13 20:03:48,570 INFO L226 Difference]: Without dead ends: 1150 [2021-07-13 20:03:48,570 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 178.1ms TimeCoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:03:48,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1150 states. [2021-07-13 20:03:48,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1150 to 753. [2021-07-13 20:03:48,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 753 states, 752 states have (on average 3.466755319148936) internal successors, (2607), 752 states have internal predecessors, (2607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:48,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 753 states to 753 states and 2607 transitions. [2021-07-13 20:03:48,586 INFO L78 Accepts]: Start accepts. Automaton has 753 states and 2607 transitions. Word has length 29 [2021-07-13 20:03:48,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:03:48,586 INFO L482 AbstractCegarLoop]: Abstraction has 753 states and 2607 transitions. [2021-07-13 20:03:48,586 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:48,586 INFO L276 IsEmpty]: Start isEmpty. Operand 753 states and 2607 transitions. [2021-07-13 20:03:48,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 20:03:48,588 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:03:48,588 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:03:48,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-07-13 20:03:48,801 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:03:48,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:03:48,801 INFO L82 PathProgramCache]: Analyzing trace with hash -75130500, now seen corresponding path program 3 times [2021-07-13 20:03:48,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:03:48,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685338743] [2021-07-13 20:03:48,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:03:48,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:03:48,832 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:03:48,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:03:48,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685338743] [2021-07-13 20:03:48,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685338743] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:48,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861492879] [2021-07-13 20:03:48,833 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 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 [2021-07-13 20:03:48,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:03:48,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:03:48,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-13 20:03:48,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:03:48,938 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:03:48,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861492879] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:48,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:03:48,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-07-13 20:03:48,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848701720] [2021-07-13 20:03:48,939 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 20:03:48,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:03:48,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 20:03:48,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:03:48,940 INFO L87 Difference]: Start difference. First operand 753 states and 2607 transitions. Second operand has 10 states, 10 states have (on average 5.3) internal successors, (53), 9 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:49,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:03:49,312 INFO L93 Difference]: Finished difference Result 2449 states and 8696 transitions. [2021-07-13 20:03:49,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 20:03:49,312 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 9 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-13 20:03:49,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:03:49,319 INFO L225 Difference]: With dead ends: 2449 [2021-07-13 20:03:49,319 INFO L226 Difference]: Without dead ends: 2435 [2021-07-13 20:03:49,319 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 191.2ms TimeCoverageRelationStatistics Valid=251, Invalid=741, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:03:49,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2435 states. [2021-07-13 20:03:49,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2435 to 1458. [2021-07-13 20:03:49,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1458 states, 1457 states have (on average 3.723404255319149) internal successors, (5425), 1457 states have internal predecessors, (5425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:49,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1458 states to 1458 states and 5425 transitions. [2021-07-13 20:03:49,355 INFO L78 Accepts]: Start accepts. Automaton has 1458 states and 5425 transitions. Word has length 31 [2021-07-13 20:03:49,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:03:49,355 INFO L482 AbstractCegarLoop]: Abstraction has 1458 states and 5425 transitions. [2021-07-13 20:03:49,356 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 9 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:49,356 INFO L276 IsEmpty]: Start isEmpty. Operand 1458 states and 5425 transitions. [2021-07-13 20:03:49,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:03:49,359 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:03:49,359 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:03:49,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:03:49,569 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:03:49,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:03:49,569 INFO L82 PathProgramCache]: Analyzing trace with hash -2064884962, now seen corresponding path program 4 times [2021-07-13 20:03:49,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:03:49,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240443337] [2021-07-13 20:03:49,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:03:49,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:03:49,592 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-13 20:03:49,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:03:49,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240443337] [2021-07-13 20:03:49,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240443337] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:49,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456052477] [2021-07-13 20:03:49,592 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 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 [2021-07-13 20:03:49,637 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:03:49,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:03:49,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 20:03:49,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:03:49,678 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 20:03:49,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456052477] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:49,678 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:03:49,678 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-07-13 20:03:49,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316872737] [2021-07-13 20:03:49,678 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 20:03:49,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:03:49,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 20:03:49,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-07-13 20:03:49,679 INFO L87 Difference]: Start difference. First operand 1458 states and 5425 transitions. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 5 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) [2021-07-13 20:03:49,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:03:49,735 INFO L93 Difference]: Finished difference Result 3104 states and 11373 transitions. [2021-07-13 20:03:49,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 20:03:49,736 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 5 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 33 [2021-07-13 20:03:49,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:03:49,745 INFO L225 Difference]: With dead ends: 3104 [2021-07-13 20:03:49,745 INFO L226 Difference]: Without dead ends: 3100 [2021-07-13 20:03:49,745 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 15.7ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:03:49,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3100 states. [2021-07-13 20:03:49,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3100 to 1644. [2021-07-13 20:03:49,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1644 states, 1643 states have (on average 3.837492391965916) internal successors, (6305), 1643 states have internal predecessors, (6305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:49,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1644 states to 1644 states and 6305 transitions. [2021-07-13 20:03:49,788 INFO L78 Accepts]: Start accepts. Automaton has 1644 states and 6305 transitions. Word has length 33 [2021-07-13 20:03:49,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:03:49,788 INFO L482 AbstractCegarLoop]: Abstraction has 1644 states and 6305 transitions. [2021-07-13 20:03:49,788 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 5 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) [2021-07-13 20:03:49,789 INFO L276 IsEmpty]: Start isEmpty. Operand 1644 states and 6305 transitions. [2021-07-13 20:03:49,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:03:49,792 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:03:49,792 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:03:50,013 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-07-13 20:03:50,013 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:03:50,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:03:50,014 INFO L82 PathProgramCache]: Analyzing trace with hash 397003162, now seen corresponding path program 5 times [2021-07-13 20:03:50,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:03:50,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980679394] [2021-07-13 20:03:50,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:03:50,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:03:50,047 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-13 20:03:50,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:03:50,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980679394] [2021-07-13 20:03:50,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980679394] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:50,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42637685] [2021-07-13 20:03:50,048 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 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 [2021-07-13 20:03:50,082 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:03:50,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:03:50,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 20:03:50,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:03:50,133 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-13 20:03:50,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42637685] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:50,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:03:50,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-07-13 20:03:50,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130369871] [2021-07-13 20:03:50,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 20:03:50,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:03:50,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 20:03:50,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-07-13 20:03:50,134 INFO L87 Difference]: Start difference. First operand 1644 states and 6305 transitions. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 5 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) [2021-07-13 20:03:50,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:03:50,218 INFO L93 Difference]: Finished difference Result 3039 states and 11040 transitions. [2021-07-13 20:03:50,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 20:03:50,219 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 5 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 33 [2021-07-13 20:03:50,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:03:50,227 INFO L225 Difference]: With dead ends: 3039 [2021-07-13 20:03:50,227 INFO L226 Difference]: Without dead ends: 3039 [2021-07-13 20:03:50,227 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 23.5ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:03:50,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3039 states. [2021-07-13 20:03:50,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3039 to 1619. [2021-07-13 20:03:50,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1619 states, 1618 states have (on average 3.857849196538937) internal successors, (6242), 1618 states have internal predecessors, (6242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:50,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1619 states to 1619 states and 6242 transitions. [2021-07-13 20:03:50,266 INFO L78 Accepts]: Start accepts. Automaton has 1619 states and 6242 transitions. Word has length 33 [2021-07-13 20:03:50,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:03:50,266 INFO L482 AbstractCegarLoop]: Abstraction has 1619 states and 6242 transitions. [2021-07-13 20:03:50,266 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 5 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) [2021-07-13 20:03:50,266 INFO L276 IsEmpty]: Start isEmpty. Operand 1619 states and 6242 transitions. [2021-07-13 20:03:50,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:03:50,270 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:03:50,270 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:03:50,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-07-13 20:03:50,485 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:03:50,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:03:50,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1552526810, now seen corresponding path program 6 times [2021-07-13 20:03:50,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:03:50,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740342397] [2021-07-13 20:03:50,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:03:50,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:03:50,522 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-13 20:03:50,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:03:50,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740342397] [2021-07-13 20:03:50,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740342397] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:50,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739175984] [2021-07-13 20:03:50,522 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 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 [2021-07-13 20:03:50,570 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:03:50,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:03:50,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-13 20:03:50,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:03:50,630 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:03:50,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739175984] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:50,631 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:03:50,631 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-07-13 20:03:50,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466319498] [2021-07-13 20:03:50,631 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 20:03:50,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:03:50,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 20:03:50,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:03:50,631 INFO L87 Difference]: Start difference. First operand 1619 states and 6242 transitions. Second operand has 10 states, 10 states have (on average 5.3) internal successors, (53), 9 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:51,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:03:51,168 INFO L93 Difference]: Finished difference Result 7858 states and 29355 transitions. [2021-07-13 20:03:51,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-13 20:03:51,169 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 9 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:03:51,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:03:51,191 INFO L225 Difference]: With dead ends: 7858 [2021-07-13 20:03:51,192 INFO L226 Difference]: Without dead ends: 7378 [2021-07-13 20:03:51,192 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 259.0ms TimeCoverageRelationStatistics Valid=419, Invalid=1473, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 20:03:51,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7378 states. [2021-07-13 20:03:51,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7378 to 3747. [2021-07-13 20:03:51,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3747 states, 3746 states have (on average 4.203150026695141) internal successors, (15745), 3746 states have internal predecessors, (15745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:51,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3747 states to 3747 states and 15745 transitions. [2021-07-13 20:03:51,310 INFO L78 Accepts]: Start accepts. Automaton has 3747 states and 15745 transitions. Word has length 33 [2021-07-13 20:03:51,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:03:51,310 INFO L482 AbstractCegarLoop]: Abstraction has 3747 states and 15745 transitions. [2021-07-13 20:03:51,310 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 9 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:51,310 INFO L276 IsEmpty]: Start isEmpty. Operand 3747 states and 15745 transitions. [2021-07-13 20:03:51,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:03:51,319 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:03:51,319 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:03:51,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-07-13 20:03:51,533 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:03:51,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:03:51,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1594897896, now seen corresponding path program 7 times [2021-07-13 20:03:51,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:03:51,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000305614] [2021-07-13 20:03:51,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:03:51,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:03:51,558 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-13 20:03:51,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:03:51,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000305614] [2021-07-13 20:03:51,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000305614] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:51,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739700273] [2021-07-13 20:03:51,559 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:03:51,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:03:51,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 20:03:51,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:03:51,668 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 20:03:51,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739700273] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:51,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:03:51,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-07-13 20:03:51,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49573901] [2021-07-13 20:03:51,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 20:03:51,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:03:51,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 20:03:51,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-07-13 20:03:51,669 INFO L87 Difference]: Start difference. First operand 3747 states and 15745 transitions. Second operand has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:51,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:03:51,757 INFO L93 Difference]: Finished difference Result 5515 states and 21821 transitions. [2021-07-13 20:03:51,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 20:03:51,757 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:03:51,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:03:51,778 INFO L225 Difference]: With dead ends: 5515 [2021-07-13 20:03:51,778 INFO L226 Difference]: Without dead ends: 5515 [2021-07-13 20:03:51,778 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 23.6ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:03:51,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5515 states. [2021-07-13 20:03:51,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5515 to 3848. [2021-07-13 20:03:51,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3848 states, 3847 states have (on average 4.193137509747856) internal successors, (16131), 3847 states have internal predecessors, (16131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:51,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3848 states to 3848 states and 16131 transitions. [2021-07-13 20:03:51,883 INFO L78 Accepts]: Start accepts. Automaton has 3848 states and 16131 transitions. Word has length 33 [2021-07-13 20:03:51,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:03:51,883 INFO L482 AbstractCegarLoop]: Abstraction has 3848 states and 16131 transitions. [2021-07-13 20:03:51,883 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:51,883 INFO L276 IsEmpty]: Start isEmpty. Operand 3848 states and 16131 transitions. [2021-07-13 20:03:51,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:03:51,892 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:03:51,892 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:03:52,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-07-13 20:03:52,108 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:03:52,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:03:52,108 INFO L82 PathProgramCache]: Analyzing trace with hash 675776348, now seen corresponding path program 8 times [2021-07-13 20:03:52,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:03:52,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775099689] [2021-07-13 20:03:52,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:03:52,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:03:52,147 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-13 20:03:52,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:03:52,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775099689] [2021-07-13 20:03:52,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775099689] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:52,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945875153] [2021-07-13 20:03:52,148 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:03:52,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:03:52,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:03:52,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 20:03:52,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:03:52,225 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-13 20:03:52,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945875153] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:52,225 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:03:52,225 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-07-13 20:03:52,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344116285] [2021-07-13 20:03:52,226 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 20:03:52,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:03:52,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 20:03:52,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-07-13 20:03:52,226 INFO L87 Difference]: Start difference. First operand 3848 states and 16131 transitions. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:52,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:03:52,318 INFO L93 Difference]: Finished difference Result 5599 states and 22264 transitions. [2021-07-13 20:03:52,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 20:03:52,319 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:03:52,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:03:52,332 INFO L225 Difference]: With dead ends: 5599 [2021-07-13 20:03:52,332 INFO L226 Difference]: Without dead ends: 5599 [2021-07-13 20:03:52,333 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 33.4ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:03:52,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5599 states. [2021-07-13 20:03:52,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5599 to 4158. [2021-07-13 20:03:52,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4158 states, 4157 states have (on average 4.1554005292278084) internal successors, (17274), 4157 states have internal predecessors, (17274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:52,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4158 states to 4158 states and 17274 transitions. [2021-07-13 20:03:52,455 INFO L78 Accepts]: Start accepts. Automaton has 4158 states and 17274 transitions. Word has length 33 [2021-07-13 20:03:52,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:03:52,455 INFO L482 AbstractCegarLoop]: Abstraction has 4158 states and 17274 transitions. [2021-07-13 20:03:52,455 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:52,455 INFO L276 IsEmpty]: Start isEmpty. Operand 4158 states and 17274 transitions. [2021-07-13 20:03:52,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-13 20:03:52,467 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:03:52,467 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:03:52,667 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-07-13 20:03:52,668 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:03:52,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:03:52,668 INFO L82 PathProgramCache]: Analyzing trace with hash -51003200, now seen corresponding path program 9 times [2021-07-13 20:03:52,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:03:52,668 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757359641] [2021-07-13 20:03:52,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:03:52,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:03:52,800 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:03:52,800 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:03:52,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757359641] [2021-07-13 20:03:52,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757359641] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:52,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682012587] [2021-07-13 20:03:52,800 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 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 [2021-07-13 20:03:52,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:03:52,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:03:52,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-13 20:03:52,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:03:52,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:03:52,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-07-13 20:03:52,936 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:03:52,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-07-13 20:03:52,939 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:03:52,949 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:03:52,950 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:03:52,950 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:59, output treesize:45 [2021-07-13 20:03:53,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-07-13 20:03:53,009 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:03:53,032 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:03:53,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2021-07-13 20:03:53,036 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:03:53,050 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:03:53,050 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:03:53,051 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:65, output treesize:43 [2021-07-13 20:03:53,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-07-13 20:03:53,227 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:03:53,243 INFO L628 ElimStorePlain]: treesize reduction 27, result has 55.0 percent of original size [2021-07-13 20:03:53,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-07-13 20:03:53,247 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:03:53,250 INFO L628 ElimStorePlain]: treesize reduction 6, result has 45.5 percent of original size [2021-07-13 20:03:53,250 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:03:53,250 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:75, output treesize:5 [2021-07-13 20:03:53,274 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:53,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682012587] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:53,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:03:53,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 18 [2021-07-13 20:03:53,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488746283] [2021-07-13 20:03:53,275 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:03:53,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:03:53,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:03:53,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:03:53,276 INFO L87 Difference]: Start difference. First operand 4158 states and 17274 transitions. Second operand has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:54,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:03:54,072 INFO L93 Difference]: Finished difference Result 9317 states and 38403 transitions. [2021-07-13 20:03:54,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 20:03:54,072 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-13 20:03:54,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:03:54,083 INFO L225 Difference]: With dead ends: 9317 [2021-07-13 20:03:54,083 INFO L226 Difference]: Without dead ends: 4302 [2021-07-13 20:03:54,083 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 546.2ms TimeCoverageRelationStatistics Valid=174, Invalid=756, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:03:54,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4302 states. [2021-07-13 20:03:54,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4302 to 4250. [2021-07-13 20:03:54,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4250 states, 4249 states have (on average 4.120498940927277) internal successors, (17508), 4249 states have internal predecessors, (17508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:54,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4250 states to 4250 states and 17508 transitions. [2021-07-13 20:03:54,191 INFO L78 Accepts]: Start accepts. Automaton has 4250 states and 17508 transitions. Word has length 35 [2021-07-13 20:03:54,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:03:54,191 INFO L482 AbstractCegarLoop]: Abstraction has 4250 states and 17508 transitions. [2021-07-13 20:03:54,191 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:54,191 INFO L276 IsEmpty]: Start isEmpty. Operand 4250 states and 17508 transitions. [2021-07-13 20:03:54,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-13 20:03:54,200 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:03:54,200 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:03:54,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:03:54,416 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:03:54,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:03:54,417 INFO L82 PathProgramCache]: Analyzing trace with hash -436856958, now seen corresponding path program 10 times [2021-07-13 20:03:54,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:03:54,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429475005] [2021-07-13 20:03:54,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:03:54,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:03:54,524 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:03:54,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:03:54,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429475005] [2021-07-13 20:03:54,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429475005] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:54,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639065685] [2021-07-13 20:03:54,525 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 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 [2021-07-13 20:03:54,568 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:03:54,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:03:54,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:03:54,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:03:54,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:03:54,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-07-13 20:03:54,657 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:03:54,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-07-13 20:03:54,663 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:03:54,671 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:03:54,672 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:03:54,672 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:53, output treesize:39 [2021-07-13 20:03:54,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-07-13 20:03:54,784 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:03:54,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-07-13 20:03:54,787 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:03:54,791 INFO L628 ElimStorePlain]: treesize reduction 23, result has 11.5 percent of original size [2021-07-13 20:03:54,791 INFO L518 ElimStorePlain]: Eliminatee v_prenex_3 vanished before elimination [2021-07-13 20:03:54,791 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:03:54,791 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:77, output treesize:3 [2021-07-13 20:03:54,803 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:54,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639065685] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:54,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:03:54,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 16 [2021-07-13 20:03:54,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332458845] [2021-07-13 20:03:54,804 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:03:54,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:03:54,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:03:54,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:03:54,805 INFO L87 Difference]: Start difference. First operand 4250 states and 17508 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:55,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:03:55,458 INFO L93 Difference]: Finished difference Result 9382 states and 37522 transitions. [2021-07-13 20:03:55,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 20:03:55,459 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-13 20:03:55,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:03:55,470 INFO L225 Difference]: With dead ends: 9382 [2021-07-13 20:03:55,470 INFO L226 Difference]: Without dead ends: 4508 [2021-07-13 20:03:55,470 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 377.1ms TimeCoverageRelationStatistics Valid=169, Invalid=701, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:03:55,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4508 states. [2021-07-13 20:03:55,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4508 to 4326. [2021-07-13 20:03:55,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4326 states, 4325 states have (on average 4.0920231213872835) internal successors, (17698), 4325 states have internal predecessors, (17698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:55,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4326 states to 4326 states and 17698 transitions. [2021-07-13 20:03:55,550 INFO L78 Accepts]: Start accepts. Automaton has 4326 states and 17698 transitions. Word has length 35 [2021-07-13 20:03:55,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:03:55,550 INFO L482 AbstractCegarLoop]: Abstraction has 4326 states and 17698 transitions. [2021-07-13 20:03:55,551 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:55,551 INFO L276 IsEmpty]: Start isEmpty. Operand 4326 states and 17698 transitions. [2021-07-13 20:03:55,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-13 20:03:55,560 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:03:55,560 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:03:55,773 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-07-13 20:03:55,773 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:03:55,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:03:55,773 INFO L82 PathProgramCache]: Analyzing trace with hash -713440738, now seen corresponding path program 11 times [2021-07-13 20:03:55,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:03:55,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340551865] [2021-07-13 20:03:55,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:03:55,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:03:55,819 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 20:03:55,819 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:03:55,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340551865] [2021-07-13 20:03:55,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340551865] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:55,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820308686] [2021-07-13 20:03:55,819 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 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 [2021-07-13 20:03:55,851 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:03:55,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:03:55,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:03:55,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:03:55,891 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-13 20:03:55,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820308686] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:55,891 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:03:55,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-07-13 20:03:55,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931153296] [2021-07-13 20:03:55,893 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 20:03:55,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:03:55,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 20:03:55,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-07-13 20:03:55,893 INFO L87 Difference]: Start difference. First operand 4326 states and 17698 transitions. Second operand has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:55,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:03:55,976 INFO L93 Difference]: Finished difference Result 6092 states and 23684 transitions. [2021-07-13 20:03:55,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 20:03:55,976 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-13 20:03:55,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:03:55,991 INFO L225 Difference]: With dead ends: 6092 [2021-07-13 20:03:55,991 INFO L226 Difference]: Without dead ends: 6080 [2021-07-13 20:03:55,991 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 26.1ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:03:55,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6080 states. [2021-07-13 20:03:56,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6080 to 4576. [2021-07-13 20:03:56,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4576 states, 4575 states have (on average 4.078032786885246) internal successors, (18657), 4575 states have internal predecessors, (18657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:56,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4576 states to 4576 states and 18657 transitions. [2021-07-13 20:03:56,126 INFO L78 Accepts]: Start accepts. Automaton has 4576 states and 18657 transitions. Word has length 37 [2021-07-13 20:03:56,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:03:56,127 INFO L482 AbstractCegarLoop]: Abstraction has 4576 states and 18657 transitions. [2021-07-13 20:03:56,127 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:56,127 INFO L276 IsEmpty]: Start isEmpty. Operand 4576 states and 18657 transitions. [2021-07-13 20:03:56,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-13 20:03:56,137 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:03:56,137 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:03:56,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:03:56,353 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:03:56,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:03:56,353 INFO L82 PathProgramCache]: Analyzing trace with hash -967541542, now seen corresponding path program 12 times [2021-07-13 20:03:56,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:03:56,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583078285] [2021-07-13 20:03:56,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:03:56,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:03:56,381 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-13 20:03:56,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:03:56,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583078285] [2021-07-13 20:03:56,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583078285] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:56,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837992147] [2021-07-13 20:03:56,381 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:03:56,421 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:03:56,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:03:56,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:03:56,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:03:56,460 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 20:03:56,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837992147] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:56,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:03:56,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-07-13 20:03:56,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785779098] [2021-07-13 20:03:56,461 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 20:03:56,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:03:56,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 20:03:56,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-07-13 20:03:56,461 INFO L87 Difference]: Start difference. First operand 4576 states and 18657 transitions. Second operand has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:56,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:03:56,564 INFO L93 Difference]: Finished difference Result 9156 states and 35918 transitions. [2021-07-13 20:03:56,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 20:03:56,564 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-13 20:03:56,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:03:56,587 INFO L225 Difference]: With dead ends: 9156 [2021-07-13 20:03:56,587 INFO L226 Difference]: Without dead ends: 9136 [2021-07-13 20:03:56,587 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 23.0ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:03:56,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9136 states. [2021-07-13 20:03:56,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9136 to 5812. [2021-07-13 20:03:56,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5812 states, 5811 states have (on average 4.22715539494063) internal successors, (24564), 5811 states have internal predecessors, (24564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:56,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5812 states to 5812 states and 24564 transitions. [2021-07-13 20:03:56,808 INFO L78 Accepts]: Start accepts. Automaton has 5812 states and 24564 transitions. Word has length 37 [2021-07-13 20:03:56,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:03:56,808 INFO L482 AbstractCegarLoop]: Abstraction has 5812 states and 24564 transitions. [2021-07-13 20:03:56,808 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:56,808 INFO L276 IsEmpty]: Start isEmpty. Operand 5812 states and 24564 transitions. [2021-07-13 20:03:56,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-13 20:03:56,876 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:03:56,876 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:03:57,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-07-13 20:03:57,076 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:03:57,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:03:57,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1494346582, now seen corresponding path program 13 times [2021-07-13 20:03:57,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:03:57,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050584536] [2021-07-13 20:03:57,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:03:57,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:03:57,105 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 20:03:57,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:03:57,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050584536] [2021-07-13 20:03:57,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050584536] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:57,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053637420] [2021-07-13 20:03:57,105 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 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 [2021-07-13 20:03:57,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:03:57,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:03:57,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:03:57,176 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 20:03:57,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053637420] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:57,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:03:57,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-07-13 20:03:57,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785982097] [2021-07-13 20:03:57,177 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 20:03:57,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:03:57,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 20:03:57,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-07-13 20:03:57,177 INFO L87 Difference]: Start difference. First operand 5812 states and 24564 transitions. Second operand has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:57,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:03:57,277 INFO L93 Difference]: Finished difference Result 9442 states and 37337 transitions. [2021-07-13 20:03:57,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 20:03:57,278 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-13 20:03:57,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:03:57,303 INFO L225 Difference]: With dead ends: 9442 [2021-07-13 20:03:57,303 INFO L226 Difference]: Without dead ends: 9442 [2021-07-13 20:03:57,304 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 28.1ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:03:57,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9442 states. [2021-07-13 20:03:57,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9442 to 5125. [2021-07-13 20:03:57,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5125 states, 5124 states have (on average 4.132708821233411) internal successors, (21176), 5124 states have internal predecessors, (21176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:57,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5125 states to 5125 states and 21176 transitions. [2021-07-13 20:03:57,485 INFO L78 Accepts]: Start accepts. Automaton has 5125 states and 21176 transitions. Word has length 37 [2021-07-13 20:03:57,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:03:57,485 INFO L482 AbstractCegarLoop]: Abstraction has 5125 states and 21176 transitions. [2021-07-13 20:03:57,485 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:57,485 INFO L276 IsEmpty]: Start isEmpty. Operand 5125 states and 21176 transitions. [2021-07-13 20:03:57,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-13 20:03:57,496 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:03:57,497 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:03:57,697 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:03:57,697 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:03:57,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:03:57,698 INFO L82 PathProgramCache]: Analyzing trace with hash -529946470, now seen corresponding path program 14 times [2021-07-13 20:03:57,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:03:57,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540867944] [2021-07-13 20:03:57,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:03:57,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:03:57,728 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-13 20:03:57,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:03:57,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540867944] [2021-07-13 20:03:57,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540867944] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:57,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772424559] [2021-07-13 20:03:57,729 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 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 [2021-07-13 20:03:57,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:03:57,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:03:57,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:03:57,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:03:57,818 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-13 20:03:57,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772424559] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:57,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:03:57,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-07-13 20:03:57,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804678274] [2021-07-13 20:03:57,819 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 20:03:57,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:03:57,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 20:03:57,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:03:57,819 INFO L87 Difference]: Start difference. First operand 5125 states and 21176 transitions. Second operand has 8 states, 8 states have (on average 5.5) internal successors, (44), 7 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:57,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:03:57,945 INFO L93 Difference]: Finished difference Result 8511 states and 32921 transitions. [2021-07-13 20:03:57,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 20:03:57,945 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 7 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-13 20:03:57,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:03:57,968 INFO L225 Difference]: With dead ends: 8511 [2021-07-13 20:03:57,968 INFO L226 Difference]: Without dead ends: 8511 [2021-07-13 20:03:57,968 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 39.8ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:03:57,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8511 states. [2021-07-13 20:03:58,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8511 to 4053. [2021-07-13 20:03:58,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4053 states, 4052 states have (on average 4.028874629812439) internal successors, (16325), 4052 states have internal predecessors, (16325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:58,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4053 states to 4053 states and 16325 transitions. [2021-07-13 20:03:58,126 INFO L78 Accepts]: Start accepts. Automaton has 4053 states and 16325 transitions. Word has length 37 [2021-07-13 20:03:58,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:03:58,126 INFO L482 AbstractCegarLoop]: Abstraction has 4053 states and 16325 transitions. [2021-07-13 20:03:58,126 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 7 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:58,127 INFO L276 IsEmpty]: Start isEmpty. Operand 4053 states and 16325 transitions. [2021-07-13 20:03:58,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-13 20:03:58,194 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:03:58,194 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:03:58,394 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-07-13 20:03:58,395 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:03:58,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:03:58,396 INFO L82 PathProgramCache]: Analyzing trace with hash 1329963806, now seen corresponding path program 15 times [2021-07-13 20:03:58,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:03:58,396 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012936728] [2021-07-13 20:03:58,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:03:58,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:03:58,427 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-13 20:03:58,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:03:58,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012936728] [2021-07-13 20:03:58,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012936728] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:58,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139447017] [2021-07-13 20:03:58,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:03:58,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:03:58,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:03:58,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:03:58,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:03:58,545 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:03:58,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139447017] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:58,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:03:58,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-07-13 20:03:58,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584014080] [2021-07-13 20:03:58,546 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:03:58,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:03:58,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:03:58,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:03:58,546 INFO L87 Difference]: Start difference. First operand 4053 states and 16325 transitions. Second operand has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 13 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:59,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:03:59,470 INFO L93 Difference]: Finished difference Result 11628 states and 44736 transitions. [2021-07-13 20:03:59,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-07-13 20:03:59,470 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 13 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-13 20:03:59,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:03:59,498 INFO L225 Difference]: With dead ends: 11628 [2021-07-13 20:03:59,498 INFO L226 Difference]: Without dead ends: 11024 [2021-07-13 20:03:59,499 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1558 ImplicationChecksByTransitivity, 560.9ms TimeCoverageRelationStatistics Valid=1036, Invalid=3520, Unknown=0, NotChecked=0, Total=4556 [2021-07-13 20:03:59,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11024 states. [2021-07-13 20:03:59,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11024 to 5085. [2021-07-13 20:03:59,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5085 states, 5084 states have (on average 4.030881195908734) internal successors, (20493), 5084 states have internal predecessors, (20493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:59,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5085 states to 5085 states and 20493 transitions. [2021-07-13 20:03:59,638 INFO L78 Accepts]: Start accepts. Automaton has 5085 states and 20493 transitions. Word has length 37 [2021-07-13 20:03:59,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:03:59,639 INFO L482 AbstractCegarLoop]: Abstraction has 5085 states and 20493 transitions. [2021-07-13 20:03:59,639 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 13 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:59,639 INFO L276 IsEmpty]: Start isEmpty. Operand 5085 states and 20493 transitions. [2021-07-13 20:03:59,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:03:59,648 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:03:59,649 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:03:59,849 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-07-13 20:03:59,849 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:03:59,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:03:59,850 INFO L82 PathProgramCache]: Analyzing trace with hash -325004104, now seen corresponding path program 16 times [2021-07-13 20:03:59,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:03:59,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460668428] [2021-07-13 20:03:59,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:03:59,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:03:59,882 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-07-13 20:03:59,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:03:59,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460668428] [2021-07-13 20:03:59,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460668428] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:59,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447232042] [2021-07-13 20:03:59,882 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 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 [2021-07-13 20:03:59,925 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:03:59,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:03:59,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:03:59,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:03:59,978 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-07-13 20:03:59,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447232042] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:59,978 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:03:59,978 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-07-13 20:03:59,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772815159] [2021-07-13 20:03:59,979 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 20:03:59,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:03:59,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 20:03:59,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:03:59,979 INFO L87 Difference]: Start difference. First operand 5085 states and 20493 transitions. Second operand has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:00,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:04:00,142 INFO L93 Difference]: Finished difference Result 12069 states and 47387 transitions. [2021-07-13 20:04:00,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 20:04:00,142 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:04:00,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:04:00,170 INFO L225 Difference]: With dead ends: 12069 [2021-07-13 20:04:00,170 INFO L226 Difference]: Without dead ends: 12069 [2021-07-13 20:04:00,170 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 51.4ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:04:00,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12069 states. [2021-07-13 20:04:00,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12069 to 8160. [2021-07-13 20:04:00,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8160 states, 8159 states have (on average 4.160804020100502) internal successors, (33948), 8159 states have internal predecessors, (33948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:00,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8160 states to 8160 states and 33948 transitions. [2021-07-13 20:04:00,337 INFO L78 Accepts]: Start accepts. Automaton has 8160 states and 33948 transitions. Word has length 39 [2021-07-13 20:04:00,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:04:00,337 INFO L482 AbstractCegarLoop]: Abstraction has 8160 states and 33948 transitions. [2021-07-13 20:04:00,337 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:00,337 INFO L276 IsEmpty]: Start isEmpty. Operand 8160 states and 33948 transitions. [2021-07-13 20:04:00,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 20:04:00,353 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:04:00,353 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:04:00,553 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-07-13 20:04:00,553 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:04:00,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:04:00,554 INFO L82 PathProgramCache]: Analyzing trace with hash -498998490, now seen corresponding path program 17 times [2021-07-13 20:04:00,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:04:00,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439479066] [2021-07-13 20:04:00,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:04:00,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:04:00,582 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-07-13 20:04:00,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:04:00,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439479066] [2021-07-13 20:04:00,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439479066] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:00,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864958737] [2021-07-13 20:04:00,583 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 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 [2021-07-13 20:04:00,616 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:04:00,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:04:00,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:04:00,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:04:00,709 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-07-13 20:04:00,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864958737] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:00,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:04:00,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-07-13 20:04:00,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564162300] [2021-07-13 20:04:00,710 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:04:00,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:04:00,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:04:00,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:04:00,711 INFO L87 Difference]: Start difference. First operand 8160 states and 33948 transitions. Second operand has 15 states, 15 states have (on average 4.066666666666666) internal successors, (61), 14 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:02,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:04:02,005 INFO L93 Difference]: Finished difference Result 26614 states and 103468 transitions. [2021-07-13 20:04:02,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-07-13 20:04:02,006 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.066666666666666) internal successors, (61), 14 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-13 20:04:02,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:04:02,081 INFO L225 Difference]: With dead ends: 26614 [2021-07-13 20:04:02,081 INFO L226 Difference]: Without dead ends: 25436 [2021-07-13 20:04:02,083 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2458 ImplicationChecksByTransitivity, 716.3ms TimeCoverageRelationStatistics Valid=1482, Invalid=5658, Unknown=0, NotChecked=0, Total=7140 [2021-07-13 20:04:02,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25436 states. [2021-07-13 20:04:02,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25436 to 15198. [2021-07-13 20:04:02,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15198 states, 15197 states have (on average 4.284727248799105) internal successors, (65115), 15197 states have internal predecessors, (65115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:02,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15198 states to 15198 states and 65115 transitions. [2021-07-13 20:04:02,614 INFO L78 Accepts]: Start accepts. Automaton has 15198 states and 65115 transitions. Word has length 41 [2021-07-13 20:04:02,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:04:02,614 INFO L482 AbstractCegarLoop]: Abstraction has 15198 states and 65115 transitions. [2021-07-13 20:04:02,614 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.066666666666666) internal successors, (61), 14 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:02,614 INFO L276 IsEmpty]: Start isEmpty. Operand 15198 states and 65115 transitions. [2021-07-13 20:04:02,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 20:04:02,646 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:04:02,647 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:04:02,849 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-07-13 20:04:02,849 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:04:02,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:04:02,849 INFO L82 PathProgramCache]: Analyzing trace with hash -710353052, now seen corresponding path program 18 times [2021-07-13 20:04:02,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:04:02,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105125] [2021-07-13 20:04:02,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:04:02,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:04:02,876 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-07-13 20:04:02,876 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:04:02,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105125] [2021-07-13 20:04:02,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105125] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:02,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393967001] [2021-07-13 20:04:02,876 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 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 [2021-07-13 20:04:02,918 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 20:04:02,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:04:02,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:04:02,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:04:02,972 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-07-13 20:04:02,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393967001] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:02,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:04:02,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-07-13 20:04:02,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188093390] [2021-07-13 20:04:02,973 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:04:02,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:04:02,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:04:02,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:04:02,975 INFO L87 Difference]: Start difference. First operand 15198 states and 65115 transitions. Second operand has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:04,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:04:04,023 INFO L93 Difference]: Finished difference Result 62455 states and 251410 transitions. [2021-07-13 20:04:04,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 20:04:04,024 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-13 20:04:04,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:04:04,421 INFO L225 Difference]: With dead ends: 62455 [2021-07-13 20:04:04,421 INFO L226 Difference]: Without dead ends: 62455 [2021-07-13 20:04:04,422 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 641 ImplicationChecksByTransitivity, 255.4ms TimeCoverageRelationStatistics Valid=568, Invalid=1502, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 20:04:04,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62455 states. [2021-07-13 20:04:05,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62455 to 31961. [2021-07-13 20:04:05,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31961 states, 31960 states have (on average 4.464518147684606) internal successors, (142686), 31960 states have internal predecessors, (142686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:06,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31961 states to 31961 states and 142686 transitions. [2021-07-13 20:04:06,052 INFO L78 Accepts]: Start accepts. Automaton has 31961 states and 142686 transitions. Word has length 41 [2021-07-13 20:04:06,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:04:06,052 INFO L482 AbstractCegarLoop]: Abstraction has 31961 states and 142686 transitions. [2021-07-13 20:04:06,052 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:06,052 INFO L276 IsEmpty]: Start isEmpty. Operand 31961 states and 142686 transitions. [2021-07-13 20:04:06,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 20:04:06,133 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:04:06,133 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:04:06,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:04:06,336 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:04:06,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:04:06,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1417828254, now seen corresponding path program 19 times [2021-07-13 20:04:06,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:04:06,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343664056] [2021-07-13 20:04:06,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:04:06,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:04:06,638 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 13 [2021-07-13 20:04:06,780 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-13 20:04:06,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:04:06,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343664056] [2021-07-13 20:04:06,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343664056] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:06,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083451399] [2021-07-13 20:04:06,780 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 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 [2021-07-13 20:04:06,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:04:06,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:04:06,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:04:06,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:04:06,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 13 [2021-07-13 20:04:06,875 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:04:06,880 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:04:06,880 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:04:06,880 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:19 [2021-07-13 20:04:07,021 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2021-07-13 20:04:07,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2021-07-13 20:04:07,068 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:04:07,072 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:04:07,073 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:04:07,073 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:14 [2021-07-13 20:04:07,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:04:07,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 18 [2021-07-13 20:04:07,099 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:04:07,103 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:04:07,104 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:04:07,104 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:11 [2021-07-13 20:04:07,221 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:04:07,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-07-13 20:04:07,227 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:04:07,230 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:04:07,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 20:04:07,232 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:04:07,233 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:04:07,233 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:04:07,233 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:39, output treesize:5 [2021-07-13 20:04:07,246 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:04:07,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083451399] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:07,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:04:07,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-07-13 20:04:07,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309392940] [2021-07-13 20:04:07,247 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:04:07,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:04:07,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:04:07,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:04:07,247 INFO L87 Difference]: Start difference. First operand 31961 states and 142686 transitions. Second operand has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 21 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:08,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:04:08,764 INFO L93 Difference]: Finished difference Result 59369 states and 262032 transitions. [2021-07-13 20:04:08,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 20:04:08,765 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 21 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-13 20:04:08,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:04:08,890 INFO L225 Difference]: With dead ends: 59369 [2021-07-13 20:04:08,890 INFO L226 Difference]: Without dead ends: 32918 [2021-07-13 20:04:08,891 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 902.4ms TimeCoverageRelationStatistics Valid=342, Invalid=1820, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:04:08,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32918 states. [2021-07-13 20:04:09,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32918 to 31837. [2021-07-13 20:04:09,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31837 states, 31836 states have (on average 4.452538007287347) internal successors, (141751), 31836 states have internal predecessors, (141751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:09,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31837 states to 31837 states and 141751 transitions. [2021-07-13 20:04:09,816 INFO L78 Accepts]: Start accepts. Automaton has 31837 states and 141751 transitions. Word has length 41 [2021-07-13 20:04:09,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:04:09,816 INFO L482 AbstractCegarLoop]: Abstraction has 31837 states and 141751 transitions. [2021-07-13 20:04:09,816 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 21 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:09,816 INFO L276 IsEmpty]: Start isEmpty. Operand 31837 states and 141751 transitions. [2021-07-13 20:04:09,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 20:04:09,891 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:04:09,891 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:04:10,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:04:10,092 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:04:10,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:04:10,092 INFO L82 PathProgramCache]: Analyzing trace with hash -1435432606, now seen corresponding path program 20 times [2021-07-13 20:04:10,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:04:10,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086383570] [2021-07-13 20:04:10,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:04:10,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:04:10,296 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-13 20:04:10,296 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:04:10,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086383570] [2021-07-13 20:04:10,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086383570] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:10,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735688451] [2021-07-13 20:04:10,297 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 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 [2021-07-13 20:04:10,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:04:10,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:04:10,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-13 20:04:10,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:04:10,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2021-07-13 20:04:10,367 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:04:10,371 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:04:10,372 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:04:10,372 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:19 [2021-07-13 20:04:10,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:04:10,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-07-13 20:04:10,490 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:04:10,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-07-13 20:04:10,493 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:04:10,504 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:04:10,504 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:04:10,505 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:59, output treesize:45 [2021-07-13 20:04:10,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:04:10,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:04:10,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:04:10,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 28 [2021-07-13 20:04:10,556 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:04:10,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:04:10,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:04:10,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 26 [2021-07-13 20:04:10,560 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:04:10,571 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:04:10,572 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:04:10,572 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:65, output treesize:39 [2021-07-13 20:04:10,892 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:04:10,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 33 [2021-07-13 20:04:10,906 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:04:10,915 INFO L354 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2021-07-13 20:04:10,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 21 [2021-07-13 20:04:10,916 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:04:10,955 INFO L628 ElimStorePlain]: treesize reduction 5, result has 93.5 percent of original size [2021-07-13 20:04:10,960 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:04:10,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 15 [2021-07-13 20:04:10,962 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:04:10,970 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:04:10,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 15 [2021-07-13 20:04:10,971 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:04:10,977 INFO L628 ElimStorePlain]: treesize reduction 20, result has 20.0 percent of original size [2021-07-13 20:04:10,977 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:04:10,977 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:109, output treesize:5 [2021-07-13 20:04:10,993 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:04:10,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735688451] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:10,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:04:10,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 20 [2021-07-13 20:04:10,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076121739] [2021-07-13 20:04:10,994 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:04:10,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:04:10,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:04:10,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:04:10,995 INFO L87 Difference]: Start difference. First operand 31837 states and 141751 transitions. Second operand has 21 states, 21 states have (on average 3.4285714285714284) internal successors, (72), 20 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) [2021-07-13 20:04:12,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:04:12,037 INFO L93 Difference]: Finished difference Result 71320 states and 312582 transitions. [2021-07-13 20:04:12,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 20:04:12,037 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.4285714285714284) internal successors, (72), 20 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-13 20:04:12,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:04:12,402 INFO L225 Difference]: With dead ends: 71320 [2021-07-13 20:04:12,403 INFO L226 Difference]: Without dead ends: 40777 [2021-07-13 20:04:12,403 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 567.2ms TimeCoverageRelationStatistics Valid=135, Invalid=621, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:04:12,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40777 states. [2021-07-13 20:04:13,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40777 to 31018. [2021-07-13 20:04:13,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31018 states, 31017 states have (on average 4.447851178386046) internal successors, (137959), 31017 states have internal predecessors, (137959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:13,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31018 states to 31018 states and 137959 transitions. [2021-07-13 20:04:13,421 INFO L78 Accepts]: Start accepts. Automaton has 31018 states and 137959 transitions. Word has length 41 [2021-07-13 20:04:13,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:04:13,422 INFO L482 AbstractCegarLoop]: Abstraction has 31018 states and 137959 transitions. [2021-07-13 20:04:13,422 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.4285714285714284) internal successors, (72), 20 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) [2021-07-13 20:04:13,422 INFO L276 IsEmpty]: Start isEmpty. Operand 31018 states and 137959 transitions. [2021-07-13 20:04:13,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 20:04:13,720 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:04:13,720 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:04:13,921 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:04:13,921 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:04:13,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:04:13,922 INFO L82 PathProgramCache]: Analyzing trace with hash 1509269082, now seen corresponding path program 21 times [2021-07-13 20:04:13,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:04:13,922 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296963663] [2021-07-13 20:04:13,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:04:13,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:04:14,042 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-07-13 20:04:14,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:04:14,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296963663] [2021-07-13 20:04:14,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296963663] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:14,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591818308] [2021-07-13 20:04:14,043 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 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 [2021-07-13 20:04:14,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 20:04:14,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:04:14,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:04:14,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:04:14,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2021-07-13 20:04:14,124 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:04:14,129 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:04:14,130 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:04:14,130 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:19 [2021-07-13 20:04:14,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:04:14,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 18 [2021-07-13 20:04:14,157 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:04:14,163 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:04:14,164 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:04:14,164 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:14 [2021-07-13 20:04:14,210 INFO L354 Elim1Store]: treesize reduction 12, result has 60.0 percent of original size [2021-07-13 20:04:14,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 18 treesize of output 30 [2021-07-13 20:04:14,219 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:04:14,246 INFO L628 ElimStorePlain]: treesize reduction 15, result has 67.4 percent of original size [2021-07-13 20:04:14,250 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:04:14,250 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:28 [2021-07-13 20:04:14,465 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:04:14,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 20 [2021-07-13 20:04:14,471 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:04:14,480 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:04:14,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 20 [2021-07-13 20:04:14,486 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-13 20:04:14,493 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:04:14,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 12 [2021-07-13 20:04:14,494 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:04:14,498 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:04:14,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 12 [2021-07-13 20:04:14,500 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:04:14,521 INFO L628 ElimStorePlain]: treesize reduction 43, result has 33.8 percent of original size [2021-07-13 20:04:14,522 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:04:14,522 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:95, output treesize:22 [2021-07-13 20:04:14,656 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:04:14,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591818308] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:14,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:04:14,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14] total 21 [2021-07-13 20:04:14,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889148373] [2021-07-13 20:04:14,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:04:14,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:04:14,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:04:14,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:04:14,658 INFO L87 Difference]: Start difference. First operand 31018 states and 137959 transitions. Second operand has 22 states, 22 states have (on average 3.090909090909091) internal successors, (68), 21 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:14,950 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 18 [2021-07-13 20:04:16,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:04:16,334 INFO L93 Difference]: Finished difference Result 89629 states and 388893 transitions. [2021-07-13 20:04:16,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 20:04:16,353 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.090909090909091) internal successors, (68), 21 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-13 20:04:16,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:04:16,465 INFO L225 Difference]: With dead ends: 89629 [2021-07-13 20:04:16,466 INFO L226 Difference]: Without dead ends: 24194 [2021-07-13 20:04:16,466 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 716.3ms TimeCoverageRelationStatistics Valid=251, Invalid=939, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:04:16,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24194 states. [2021-07-13 20:04:16,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24194 to 24194. [2021-07-13 20:04:17,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24194 states, 24193 states have (on average 4.4164014384326045) internal successors, (106846), 24193 states have internal predecessors, (106846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:17,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24194 states to 24194 states and 106846 transitions. [2021-07-13 20:04:17,130 INFO L78 Accepts]: Start accepts. Automaton has 24194 states and 106846 transitions. Word has length 41 [2021-07-13 20:04:17,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:04:17,130 INFO L482 AbstractCegarLoop]: Abstraction has 24194 states and 106846 transitions. [2021-07-13 20:04:17,130 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.090909090909091) internal successors, (68), 21 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:17,131 INFO L276 IsEmpty]: Start isEmpty. Operand 24194 states and 106846 transitions. [2021-07-13 20:04:17,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:04:17,188 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:04:17,188 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:04:17,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:04:17,405 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:04:17,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:04:17,405 INFO L82 PathProgramCache]: Analyzing trace with hash 579617674, now seen corresponding path program 22 times [2021-07-13 20:04:17,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:04:17,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642142565] [2021-07-13 20:04:17,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:04:17,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:04:17,475 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-07-13 20:04:17,476 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:04:17,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642142565] [2021-07-13 20:04:17,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642142565] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:17,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134379625] [2021-07-13 20:04:17,476 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 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 [2021-07-13 20:04:17,512 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:04:17,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:04:17,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 20:04:17,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:04:17,568 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-07-13 20:04:17,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134379625] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:17,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:04:17,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-13 20:04:17,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768776664] [2021-07-13 20:04:17,569 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 20:04:17,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:04:17,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 20:04:17,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:04:17,570 INFO L87 Difference]: Start difference. First operand 24194 states and 106846 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:18,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:04:18,219 INFO L93 Difference]: Finished difference Result 31728 states and 133271 transitions. [2021-07-13 20:04:18,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 20:04:18,219 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:04:18,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:04:18,326 INFO L225 Difference]: With dead ends: 31728 [2021-07-13 20:04:18,326 INFO L226 Difference]: Without dead ends: 31708 [2021-07-13 20:04:18,327 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 75.5ms TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:04:18,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31708 states. [2021-07-13 20:04:19,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31708 to 20545. [2021-07-13 20:04:19,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20545 states, 20544 states have (on average 4.338492990654205) internal successors, (89130), 20544 states have internal predecessors, (89130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:19,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20545 states to 20545 states and 89130 transitions. [2021-07-13 20:04:19,131 INFO L78 Accepts]: Start accepts. Automaton has 20545 states and 89130 transitions. Word has length 43 [2021-07-13 20:04:19,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:04:19,131 INFO L482 AbstractCegarLoop]: Abstraction has 20545 states and 89130 transitions. [2021-07-13 20:04:19,132 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:19,132 INFO L276 IsEmpty]: Start isEmpty. Operand 20545 states and 89130 transitions. [2021-07-13 20:04:19,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:04:19,174 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:04:19,174 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:04:19,389 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-07-13 20:04:19,389 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:04:19,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:04:19,389 INFO L82 PathProgramCache]: Analyzing trace with hash 856538626, now seen corresponding path program 23 times [2021-07-13 20:04:19,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:04:19,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710298395] [2021-07-13 20:04:19,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:04:19,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:04:19,413 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-07-13 20:04:19,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:04:19,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710298395] [2021-07-13 20:04:19,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710298395] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:19,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162069616] [2021-07-13 20:04:19,413 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 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 [2021-07-13 20:04:19,448 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-13 20:04:19,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:04:19,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 20:04:19,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:04:19,497 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-07-13 20:04:19,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162069616] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:19,497 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:04:19,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-07-13 20:04:19,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827498023] [2021-07-13 20:04:19,497 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 20:04:19,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:04:19,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 20:04:19,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-07-13 20:04:19,498 INFO L87 Difference]: Start difference. First operand 20545 states and 89130 transitions. Second operand has 7 states, 7 states have (on average 6.0) internal successors, (42), 6 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) [2021-07-13 20:04:19,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:04:19,886 INFO L93 Difference]: Finished difference Result 25792 states and 107062 transitions. [2021-07-13 20:04:19,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 20:04:19,887 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 6 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 43 [2021-07-13 20:04:19,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:04:19,997 INFO L225 Difference]: With dead ends: 25792 [2021-07-13 20:04:19,997 INFO L226 Difference]: Without dead ends: 25788 [2021-07-13 20:04:19,997 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 25.4ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:04:20,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25788 states. [2021-07-13 20:04:20,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25788 to 20545. [2021-07-13 20:04:20,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20545 states, 20544 states have (on average 4.338395638629284) internal successors, (89128), 20544 states have internal predecessors, (89128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:20,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20545 states to 20545 states and 89128 transitions. [2021-07-13 20:04:20,644 INFO L78 Accepts]: Start accepts. Automaton has 20545 states and 89128 transitions. Word has length 43 [2021-07-13 20:04:20,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:04:20,644 INFO L482 AbstractCegarLoop]: Abstraction has 20545 states and 89128 transitions. [2021-07-13 20:04:20,644 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 6 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) [2021-07-13 20:04:20,644 INFO L276 IsEmpty]: Start isEmpty. Operand 20545 states and 89128 transitions. [2021-07-13 20:04:20,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:04:20,689 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:04:20,689 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:04:20,905 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-07-13 20:04:20,906 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:04:20,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:04:20,906 INFO L82 PathProgramCache]: Analyzing trace with hash -1826733498, now seen corresponding path program 24 times [2021-07-13 20:04:20,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:04:20,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098556860] [2021-07-13 20:04:20,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:04:20,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:04:20,937 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-07-13 20:04:20,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:04:20,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098556860] [2021-07-13 20:04:20,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098556860] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:20,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171418461] [2021-07-13 20:04:20,937 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:04:20,969 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 20:04:20,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:04:20,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 20:04:20,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:04:21,011 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-07-13 20:04:21,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171418461] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:21,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:04:21,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-07-13 20:04:21,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810906346] [2021-07-13 20:04:21,012 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 20:04:21,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:04:21,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 20:04:21,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:04:21,012 INFO L87 Difference]: Start difference. First operand 20545 states and 89128 transitions. Second operand has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:21,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:04:21,498 INFO L93 Difference]: Finished difference Result 29923 states and 123633 transitions. [2021-07-13 20:04:21,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:04:21,525 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:04:21,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:04:21,663 INFO L225 Difference]: With dead ends: 29923 [2021-07-13 20:04:21,663 INFO L226 Difference]: Without dead ends: 29911 [2021-07-13 20:04:21,663 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 45.1ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:04:21,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29911 states. [2021-07-13 20:04:22,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29911 to 22182. [2021-07-13 20:04:22,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22182 states, 22181 states have (on average 4.363960146070962) internal successors, (96797), 22181 states have internal predecessors, (96797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:22,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22182 states to 22182 states and 96797 transitions. [2021-07-13 20:04:22,323 INFO L78 Accepts]: Start accepts. Automaton has 22182 states and 96797 transitions. Word has length 43 [2021-07-13 20:04:22,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:04:22,323 INFO L482 AbstractCegarLoop]: Abstraction has 22182 states and 96797 transitions. [2021-07-13 20:04:22,323 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:22,323 INFO L276 IsEmpty]: Start isEmpty. Operand 22182 states and 96797 transitions. [2021-07-13 20:04:22,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:04:22,370 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:04:22,370 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:04:22,570 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-07-13 20:04:22,571 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:04:22,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:04:22,571 INFO L82 PathProgramCache]: Analyzing trace with hash 733833666, now seen corresponding path program 25 times [2021-07-13 20:04:22,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:04:22,571 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510389383] [2021-07-13 20:04:22,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:04:22,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:04:22,603 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-07-13 20:04:22,604 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:04:22,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510389383] [2021-07-13 20:04:22,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510389383] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:22,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473521207] [2021-07-13 20:04:22,604 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:04:22,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:04:22,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 20:04:22,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:04:22,701 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-07-13 20:04:22,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473521207] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:22,701 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:04:22,701 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-07-13 20:04:22,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640416221] [2021-07-13 20:04:22,702 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 20:04:22,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:04:22,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 20:04:22,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:04:22,702 INFO L87 Difference]: Start difference. First operand 22182 states and 96797 transitions. Second operand has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:23,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:04:23,254 INFO L93 Difference]: Finished difference Result 34390 states and 141751 transitions. [2021-07-13 20:04:23,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:04:23,254 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:04:23,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:04:23,382 INFO L225 Difference]: With dead ends: 34390 [2021-07-13 20:04:23,382 INFO L226 Difference]: Without dead ends: 34390 [2021-07-13 20:04:23,382 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 42.5ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:04:23,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34390 states. [2021-07-13 20:04:23,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34390 to 22406. [2021-07-13 20:04:24,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22406 states, 22405 states have (on average 4.360365989734435) internal successors, (97694), 22405 states have internal predecessors, (97694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:24,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22406 states to 22406 states and 97694 transitions. [2021-07-13 20:04:24,216 INFO L78 Accepts]: Start accepts. Automaton has 22406 states and 97694 transitions. Word has length 43 [2021-07-13 20:04:24,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:04:24,216 INFO L482 AbstractCegarLoop]: Abstraction has 22406 states and 97694 transitions. [2021-07-13 20:04:24,216 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:24,216 INFO L276 IsEmpty]: Start isEmpty. Operand 22406 states and 97694 transitions. [2021-07-13 20:04:24,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:04:24,266 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:04:24,266 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:04:24,466 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:04:24,467 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:04:24,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:04:24,467 INFO L82 PathProgramCache]: Analyzing trace with hash 1750646786, now seen corresponding path program 26 times [2021-07-13 20:04:24,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:04:24,467 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289157062] [2021-07-13 20:04:24,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:04:24,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:04:24,493 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-07-13 20:04:24,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:04:24,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289157062] [2021-07-13 20:04:24,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289157062] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:24,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159129288] [2021-07-13 20:04:24,494 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:04:24,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:04:24,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:04:24,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 20:04:24,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:04:24,578 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-07-13 20:04:24,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159129288] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:24,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:04:24,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-07-13 20:04:24,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147485883] [2021-07-13 20:04:24,578 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 20:04:24,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:04:24,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 20:04:24,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:04:24,579 INFO L87 Difference]: Start difference. First operand 22406 states and 97694 transitions. Second operand has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:24,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:04:24,920 INFO L93 Difference]: Finished difference Result 38562 states and 161998 transitions. [2021-07-13 20:04:24,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 20:04:24,920 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:04:24,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:04:25,209 INFO L225 Difference]: With dead ends: 38562 [2021-07-13 20:04:25,209 INFO L226 Difference]: Without dead ends: 38558 [2021-07-13 20:04:25,209 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 33.6ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:04:25,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38558 states. [2021-07-13 20:04:25,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38558 to 29258. [2021-07-13 20:04:25,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29258 states, 29257 states have (on average 4.442629114399972) internal successors, (129978), 29257 states have internal predecessors, (129978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:26,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29258 states to 29258 states and 129978 transitions. [2021-07-13 20:04:26,072 INFO L78 Accepts]: Start accepts. Automaton has 29258 states and 129978 transitions. Word has length 43 [2021-07-13 20:04:26,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:04:26,072 INFO L482 AbstractCegarLoop]: Abstraction has 29258 states and 129978 transitions. [2021-07-13 20:04:26,072 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:26,073 INFO L276 IsEmpty]: Start isEmpty. Operand 29258 states and 129978 transitions. [2021-07-13 20:04:26,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:04:26,150 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:04:26,150 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:04:26,350 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:04:26,351 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:04:26,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:04:26,351 INFO L82 PathProgramCache]: Analyzing trace with hash 1098153854, now seen corresponding path program 27 times [2021-07-13 20:04:26,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:04:26,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934574410] [2021-07-13 20:04:26,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:04:26,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:04:26,388 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-07-13 20:04:26,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:04:26,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934574410] [2021-07-13 20:04:26,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934574410] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:26,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105127062] [2021-07-13 20:04:26,389 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:04:26,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 20:04:26,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:04:26,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:04:26,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:04:26,734 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-13 20:04:26,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105127062] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:26,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:04:26,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 15 [2021-07-13 20:04:26,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276818443] [2021-07-13 20:04:26,735 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:04:26,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:04:26,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:04:26,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:04:26,736 INFO L87 Difference]: Start difference. First operand 29258 states and 129978 transitions. Second operand has 16 states, 16 states have (on average 4.3125) internal successors, (69), 15 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:29,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:04:29,226 INFO L93 Difference]: Finished difference Result 130071 states and 514816 transitions. [2021-07-13 20:04:29,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2021-07-13 20:04:29,226 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.3125) internal successors, (69), 15 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:04:29,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:04:30,123 INFO L225 Difference]: With dead ends: 130071 [2021-07-13 20:04:30,123 INFO L226 Difference]: Without dead ends: 127719 [2021-07-13 20:04:30,126 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6115 ImplicationChecksByTransitivity, 1365.7ms TimeCoverageRelationStatistics Valid=3011, Invalid=10795, Unknown=0, NotChecked=0, Total=13806 [2021-07-13 20:04:30,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127719 states. [2021-07-13 20:04:32,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127719 to 39730. [2021-07-13 20:04:32,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39730 states, 39729 states have (on average 4.411387147927207) internal successors, (175260), 39729 states have internal predecessors, (175260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:32,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39730 states to 39730 states and 175260 transitions. [2021-07-13 20:04:32,745 INFO L78 Accepts]: Start accepts. Automaton has 39730 states and 175260 transitions. Word has length 43 [2021-07-13 20:04:32,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:04:32,761 INFO L482 AbstractCegarLoop]: Abstraction has 39730 states and 175260 transitions. [2021-07-13 20:04:32,761 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.3125) internal successors, (69), 15 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:32,761 INFO L276 IsEmpty]: Start isEmpty. Operand 39730 states and 175260 transitions. [2021-07-13 20:04:32,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-07-13 20:04:32,887 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:04:32,887 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:04:33,091 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:04:33,091 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:04:33,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:04:33,092 INFO L82 PathProgramCache]: Analyzing trace with hash 1617681380, now seen corresponding path program 28 times [2021-07-13 20:04:33,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:04:33,092 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675802629] [2021-07-13 20:04:33,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:04:33,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:04:33,123 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-07-13 20:04:33,123 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:04:33,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675802629] [2021-07-13 20:04:33,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675802629] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:33,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244557408] [2021-07-13 20:04:33,124 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:04:33,154 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:04:33,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:04:33,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 20:04:33,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:04:33,204 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-07-13 20:04:33,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244557408] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:33,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:04:33,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-07-13 20:04:33,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261190583] [2021-07-13 20:04:33,205 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 20:04:33,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:04:33,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 20:04:33,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:04:33,206 INFO L87 Difference]: Start difference. First operand 39730 states and 175260 transitions. Second operand has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:34,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:04:34,048 INFO L93 Difference]: Finished difference Result 67789 states and 281482 transitions. [2021-07-13 20:04:34,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 20:04:34,049 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-07-13 20:04:34,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:04:34,357 INFO L225 Difference]: With dead ends: 67789 [2021-07-13 20:04:34,357 INFO L226 Difference]: Without dead ends: 67789 [2021-07-13 20:04:34,357 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 62.4ms TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:04:34,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67789 states. [2021-07-13 20:04:35,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67789 to 42904. [2021-07-13 20:04:35,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42904 states, 42903 states have (on average 4.394098314803161) internal successors, (188520), 42903 states have internal predecessors, (188520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:35,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42904 states to 42904 states and 188520 transitions. [2021-07-13 20:04:35,797 INFO L78 Accepts]: Start accepts. Automaton has 42904 states and 188520 transitions. Word has length 45 [2021-07-13 20:04:35,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:04:35,797 INFO L482 AbstractCegarLoop]: Abstraction has 42904 states and 188520 transitions. [2021-07-13 20:04:35,797 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:35,797 INFO L276 IsEmpty]: Start isEmpty. Operand 42904 states and 188520 transitions. [2021-07-13 20:04:36,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-07-13 20:04:36,165 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:04:36,165 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:04:36,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:04:36,380 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:04:36,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:04:36,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1352044384, now seen corresponding path program 29 times [2021-07-13 20:04:36,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:04:36,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622443968] [2021-07-13 20:04:36,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:04:36,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:04:36,412 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-07-13 20:04:36,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:04:36,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622443968] [2021-07-13 20:04:36,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622443968] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:36,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387894572] [2021-07-13 20:04:36,413 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:04:36,446 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 20:04:36,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:04:36,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:04:36,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:04:36,557 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 19 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-13 20:04:36,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387894572] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:36,557 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:04:36,557 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2021-07-13 20:04:36,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716148549] [2021-07-13 20:04:36,557 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:04:36,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:04:36,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:04:36,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:04:36,558 INFO L87 Difference]: Start difference. First operand 42904 states and 188520 transitions. Second operand has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 16 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:38,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:04:38,761 INFO L93 Difference]: Finished difference Result 115466 states and 489083 transitions. [2021-07-13 20:04:38,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-07-13 20:04:38,761 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 16 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-07-13 20:04:38,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:04:39,337 INFO L225 Difference]: With dead ends: 115466 [2021-07-13 20:04:39,337 INFO L226 Difference]: Without dead ends: 113950 [2021-07-13 20:04:39,339 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2571 ImplicationChecksByTransitivity, 688.6ms TimeCoverageRelationStatistics Valid=1536, Invalid=5604, Unknown=0, NotChecked=0, Total=7140 [2021-07-13 20:04:39,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113950 states. [2021-07-13 20:04:41,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113950 to 40933. [2021-07-13 20:04:41,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40933 states, 40932 states have (on average 4.4053796540603924) internal successors, (180321), 40932 states have internal predecessors, (180321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:41,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40933 states to 40933 states and 180321 transitions. [2021-07-13 20:04:41,440 INFO L78 Accepts]: Start accepts. Automaton has 40933 states and 180321 transitions. Word has length 45 [2021-07-13 20:04:41,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:04:41,440 INFO L482 AbstractCegarLoop]: Abstraction has 40933 states and 180321 transitions. [2021-07-13 20:04:41,440 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 16 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:41,440 INFO L276 IsEmpty]: Start isEmpty. Operand 40933 states and 180321 transitions. [2021-07-13 20:04:41,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-07-13 20:04:41,536 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:04:41,536 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:04:41,737 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable94 [2021-07-13 20:04:41,737 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:04:41,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:04:41,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1091018938, now seen corresponding path program 30 times [2021-07-13 20:04:41,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:04:41,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221060722] [2021-07-13 20:04:41,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:04:41,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:04:42,014 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-07-13 20:04:42,014 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:04:42,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221060722] [2021-07-13 20:04:42,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221060722] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:42,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100812894] [2021-07-13 20:04:42,014 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:04:42,063 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:04:42,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:04:42,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 20:04:42,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:04:42,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 7 [2021-07-13 20:04:42,109 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:04:42,112 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:04:42,113 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:04:42,113 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:9 [2021-07-13 20:04:42,215 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:04:42,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-07-13 20:04:42,221 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:04:42,228 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:04:42,235 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:04:42,235 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:29, output treesize:15 [2021-07-13 20:04:42,268 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-07-13 20:04:42,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100812894] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:42,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:04:42,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 20 [2021-07-13 20:04:42,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293278226] [2021-07-13 20:04:42,268 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:04:42,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:04:42,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:04:42,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:04:42,269 INFO L87 Difference]: Start difference. First operand 40933 states and 180321 transitions. Second operand has 20 states, 20 states have (on average 3.8) internal successors, (76), 20 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:44,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:04:44,852 INFO L93 Difference]: Finished difference Result 77213 states and 327298 transitions. [2021-07-13 20:04:44,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-07-13 20:04:44,853 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.8) internal successors, (76), 20 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-07-13 20:04:44,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:04:45,168 INFO L225 Difference]: With dead ends: 77213 [2021-07-13 20:04:45,168 INFO L226 Difference]: Without dead ends: 76984 [2021-07-13 20:04:45,169 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1860 ImplicationChecksByTransitivity, 1640.7ms TimeCoverageRelationStatistics Valid=1363, Invalid=5117, Unknown=0, NotChecked=0, Total=6480 [2021-07-13 20:04:45,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76984 states. [2021-07-13 20:04:46,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76984 to 44638. [2021-07-13 20:04:46,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44638 states, 44637 states have (on average 4.39812263368954) internal successors, (196319), 44637 states have internal predecessors, (196319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:46,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44638 states to 44638 states and 196319 transitions. [2021-07-13 20:04:46,893 INFO L78 Accepts]: Start accepts. Automaton has 44638 states and 196319 transitions. Word has length 45 [2021-07-13 20:04:46,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:04:46,894 INFO L482 AbstractCegarLoop]: Abstraction has 44638 states and 196319 transitions. [2021-07-13 20:04:46,894 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.8) internal successors, (76), 20 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:46,894 INFO L276 IsEmpty]: Start isEmpty. Operand 44638 states and 196319 transitions. [2021-07-13 20:04:47,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 20:04:47,023 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:04:47,023 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:04:47,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:04:47,229 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:04:47,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:04:47,229 INFO L82 PathProgramCache]: Analyzing trace with hash -218983474, now seen corresponding path program 31 times [2021-07-13 20:04:47,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:04:47,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531801328] [2021-07-13 20:04:47,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:04:47,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:04:47,420 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-07-13 20:04:47,420 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:04:47,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531801328] [2021-07-13 20:04:47,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531801328] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:47,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068804830] [2021-07-13 20:04:47,420 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:04:47,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:04:47,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:04:47,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:04:47,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:04:47,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-07-13 20:04:47,622 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:04:47,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-07-13 20:04:47,625 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:04:47,635 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:04:47,636 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:04:47,636 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:59, output treesize:45 [2021-07-13 20:04:47,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:04:47,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:04:47,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:04:47,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 28 [2021-07-13 20:04:47,685 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:04:47,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:04:47,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:04:47,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 26 [2021-07-13 20:04:47,690 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:04:47,707 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:04:47,708 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:04:47,708 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:75, output treesize:45 [2021-07-13 20:04:47,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:04:47,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:04:47,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:04:47,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 28 [2021-07-13 20:04:47,758 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:04:47,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:04:47,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:04:47,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 26 [2021-07-13 20:04:47,763 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:04:47,775 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:04:47,776 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:04:47,776 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:65, output treesize:39 [2021-07-13 20:04:47,997 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:04:47,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 31 [2021-07-13 20:04:48,012 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:04:48,017 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:04:48,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 15 [2021-07-13 20:04:48,018 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:04:48,213 INFO L628 ElimStorePlain]: treesize reduction 74, result has 6.3 percent of original size [2021-07-13 20:04:48,213 INFO L518 ElimStorePlain]: Eliminatee v_prenex_25 vanished before elimination [2021-07-13 20:04:48,214 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:04:48,214 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:109, output treesize:5 [2021-07-13 20:04:48,244 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 40 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-13 20:04:48,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068804830] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:48,244 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:04:48,244 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 21 [2021-07-13 20:04:48,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065842600] [2021-07-13 20:04:48,245 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:04:48,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:04:48,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:04:48,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:04:48,246 INFO L87 Difference]: Start difference. First operand 44638 states and 196319 transitions. Second operand has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 21 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:49,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:04:49,609 INFO L93 Difference]: Finished difference Result 57374 states and 249695 transitions. [2021-07-13 20:04:49,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:04:49,610 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 21 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 20:04:49,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:04:49,610 INFO L225 Difference]: With dead ends: 57374 [2021-07-13 20:04:49,610 INFO L226 Difference]: Without dead ends: 0 [2021-07-13 20:04:49,610 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 623.5ms TimeCoverageRelationStatistics Valid=186, Invalid=806, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:04:49,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-07-13 20:04:49,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-07-13 20:04:49,610 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) [2021-07-13 20:04:49,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-07-13 20:04:49,610 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 47 [2021-07-13 20:04:49,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:04:49,611 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-07-13 20:04:49,611 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 21 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:49,611 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-07-13 20:04:49,611 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-07-13 20:04:49,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-07-13 20:04:49,822 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-07-13 20:04:49,824 INFO L202 PluginConnector]: Adding new model min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.07 08:04:49 BasicIcfg [2021-07-13 20:04:49,824 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-13 20:04:49,824 INFO L168 Benchmark]: Toolchain (without parser) took 66164.02 ms. Allocated memory was 202.4 MB in the beginning and 7.7 GB in the end (delta: 7.5 GB). Free memory was 183.3 MB in the beginning and 7.1 GB in the end (delta: -7.0 GB). Peak memory consumption was 584.7 MB. Max. memory is 8.0 GB. [2021-07-13 20:04:49,824 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 202.4 MB. Free memory is still 184.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-07-13 20:04:49,824 INFO L168 Benchmark]: Boogie Procedure Inliner took 21.00 ms. Allocated memory is still 202.4 MB. Free memory was 183.2 MB in the beginning and 181.8 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-07-13 20:04:49,824 INFO L168 Benchmark]: Boogie Preprocessor took 17.64 ms. Allocated memory is still 202.4 MB. Free memory was 181.7 MB in the beginning and 180.8 MB in the end (delta: 848.5 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-07-13 20:04:49,824 INFO L168 Benchmark]: RCFGBuilder took 213.97 ms. Allocated memory is still 202.4 MB. Free memory was 180.6 MB in the beginning and 166.8 MB in the end (delta: 13.8 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-07-13 20:04:49,824 INFO L168 Benchmark]: TraceAbstraction took 65907.18 ms. Allocated memory was 202.4 MB in the beginning and 7.7 GB in the end (delta: 7.5 GB). Free memory was 166.4 MB in the beginning and 7.1 GB in the end (delta: -7.0 GB). Peak memory consumption was 567.9 MB. Max. memory is 8.0 GB. [2021-07-13 20:04:49,825 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 0.09 ms. Allocated memory is still 202.4 MB. Free memory is still 184.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 21.00 ms. Allocated memory is still 202.4 MB. Free memory was 183.2 MB in the beginning and 181.8 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 8.0 GB. * Boogie Preprocessor took 17.64 ms. Allocated memory is still 202.4 MB. Free memory was 181.7 MB in the beginning and 180.8 MB in the end (delta: 848.5 kB). There was no memory consumed. Max. memory is 8.0 GB. * RCFGBuilder took 213.97 ms. Allocated memory is still 202.4 MB. Free memory was 180.6 MB in the beginning and 166.8 MB in the end (delta: 13.8 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 65907.18 ms. Allocated memory was 202.4 MB in the beginning and 7.7 GB in the end (delta: 7.5 GB). Free memory was 166.4 MB in the beginning and 7.1 GB in the end (delta: -7.0 GB). Peak memory consumption was 567.9 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 77]: 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 9 procedures, 56 locations, 5 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 65823.6ms, OverallIterations: 41, TraceHistogramMax: 4, EmptinessCheckTime: 1826.5ms, AutomataDifference: 28614.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 78.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 2344 SDtfs, 11041 SDslu, 13732 SDs, 0 SdLazy, 11972 SolverSat, 1708 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5948.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2258 GetRequests, 1229 SyntacticMatches, 29 SemanticMatches, 1000 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18814 ImplicationChecksByTransitivity, 10835.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=44638occurred in iteration=40, InterpolantAutomatonStates: 957, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 18517.1ms AutomataMinimizationTime, 41 MinimizatonAttempts, 356399 StatesRemovedByMinimization, 37 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 210.2ms SsaConstructionTime, 637.0ms SatisfiabilityAnalysisTime, 7793.5ms InterpolantComputationTime, 2703 NumberOfCodeBlocks, 2696 NumberOfCodeBlocksAsserted, 135 NumberOfCheckSat, 2628 ConstructedInterpolants, 4 QuantifiedInterpolants, 13598 SizeOfPredicates, 80 NumberOfNonLiveVariables, 3451 ConjunctsInSsa, 392 ConjunctsInUnsatCore, 75 InterpolantComputations, 7 PerfectInterpolantSequences, 778/1413 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...