/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/min-max-inc-dec.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 05:33:36,297 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 05:33:36,299 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 05:33:36,327 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 05:33:36,428 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 05:33:36,428 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 05:33:36,429 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 05:33:36,433 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-05 05:33:36,466 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 05:33:36,466 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 05:33:36,466 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 05:33:36,466 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 05:33:36,467 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 05:33:36,467 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 05:33:36,467 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 05:33:36,468 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 05:33:36,468 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 05:33:36,468 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 05:33:36,468 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 05:33:36,468 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 05:33:36,468 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 05:33:36,468 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 05:33:36,468 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 05:33:36,469 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 05:33:36,469 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 05:33:36,469 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 05:33:36,469 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 05:33:36,469 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 05:33:36,469 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 05:33:36,469 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 05:33:36,469 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 05:33:36,469 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 05:33:36,470 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 05:33:36,470 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 05:33:36,470 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 05:33:36,470 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 05:33:36,470 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 05:33:36,470 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 05:33:36,470 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 05:33:36,470 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 05:33:36,791 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 05:33:36,808 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 05:33:36,810 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 05:33:36,811 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 05:33:36,812 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 05:33:36,813 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/min-max-inc-dec.wvr.bpl [2021-06-05 05:33:36,813 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/min-max-inc-dec.wvr.bpl' [2021-06-05 05:33:36,890 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 05:33:36,892 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 05:33:36,896 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 05:33:36,896 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 05:33:36,896 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 05:33:36,904 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "min-max-inc-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:33:36" (1/1) ... [2021-06-05 05:33:36,910 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "min-max-inc-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:33:36" (1/1) ... [2021-06-05 05:33:36,916 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 05:33:36,917 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 05:33:36,917 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 05:33:36,918 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 05:33:36,924 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "min-max-inc-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:33:36" (1/1) ... [2021-06-05 05:33:36,924 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "min-max-inc-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:33:36" (1/1) ... [2021-06-05 05:33:36,925 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "min-max-inc-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:33:36" (1/1) ... [2021-06-05 05:33:36,925 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "min-max-inc-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:33:36" (1/1) ... [2021-06-05 05:33:36,928 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "min-max-inc-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:33:36" (1/1) ... [2021-06-05 05:33:36,930 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "min-max-inc-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:33:36" (1/1) ... [2021-06-05 05:33:36,931 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "min-max-inc-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:33:36" (1/1) ... [2021-06-05 05:33:36,932 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 05:33:36,933 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 05:33:36,933 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 05:33:36,933 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 05:33:36,934 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "min-max-inc-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:33:36" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 05:33:36,988 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 05:33:36,988 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 05:33:36,989 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 05:33:36,989 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 05:33:36,989 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 05:33:36,989 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 05:33:36,989 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 05:33:36,989 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 05:33:36,989 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 05:33:36,990 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 05:33:36,990 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 05:33:36,990 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 05:33:36,990 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-06-05 05:33:36,990 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-06-05 05:33:36,990 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-06-05 05:33:36,990 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread5 given in one single declaration [2021-06-05 05:33:36,991 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2021-06-05 05:33:36,991 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2021-06-05 05:33:36,991 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 05:33:37,280 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 05:33:37,280 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 05:33:37,282 INFO L202 PluginConnector]: Adding new model min-max-inc-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 05:33:37 BoogieIcfgContainer [2021-06-05 05:33:37,282 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 05:33:37,283 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 05:33:37,283 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 05:33:37,286 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 05:33:37,286 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-max-inc-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:33:36" (1/2) ... [2021-06-05 05:33:37,287 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67440338 and model type min-max-inc-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 05:33:37, skipping insertion in model container [2021-06-05 05:33:37,287 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-max-inc-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 05:33:37" (2/2) ... [2021-06-05 05:33:37,288 INFO L111 eAbstractionObserver]: Analyzing ICFG min-max-inc-dec.wvr.bpl [2021-06-05 05:33:37,295 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 05:33:37,295 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 05:33:37,295 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 05:33:37,296 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 05:33:37,404 INFO L149 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2021-06-05 05:33:37,424 INFO L255 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-06-05 05:33:37,454 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 05:33:37,455 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 05:33:37,455 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 05:33:37,455 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 05:33:37,455 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 05:33:37,455 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 05:33:37,455 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 05:33:37,455 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 05:33:37,465 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 54 places, 42 transitions, 124 flow [2021-06-05 05:33:37,680 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 2848 states, 2846 states have (on average 4.6394940267041465) internal successors, (13204), 2847 states have internal predecessors, (13204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:33:37,693 INFO L276 IsEmpty]: Start isEmpty. Operand has 2848 states, 2846 states have (on average 4.6394940267041465) internal successors, (13204), 2847 states have internal predecessors, (13204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:33:37,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 05:33:37,728 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:33:37,729 INFO L521 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] [2021-06-05 05:33:37,729 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:33:37,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:33:37,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1318377574, now seen corresponding path program 1 times [2021-06-05 05:33:37,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:33:37,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242929253] [2021-06-05 05:33:37,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:33:37,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:33:37,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:33:37,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:33:37,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242929253] [2021-06-05 05:33:37,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242929253] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:33:37,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:33:37,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 05:33:37,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099196359] [2021-06-05 05:33:37,928 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 05:33:37,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:33:37,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 05:33:37,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 05:33:37,955 INFO L87 Difference]: Start difference. First operand has 2848 states, 2846 states have (on average 4.6394940267041465) internal successors, (13204), 2847 states have internal predecessors, (13204), 0 states have call successors, (0), 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 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:33:38,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:33:38,298 INFO L93 Difference]: Finished difference Result 13093 states and 60005 transitions. [2021-06-05 05:33:38,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 05:33:38,300 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 05:33:38,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:33:38,404 INFO L225 Difference]: With dead ends: 13093 [2021-06-05 05:33:38,405 INFO L226 Difference]: Without dead ends: 8907 [2021-06-05 05:33:38,407 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 46.4ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 05:33:38,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8907 states. [2021-06-05 05:33:38,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8907 to 3875. [2021-06-05 05:33:38,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3875 states, 3874 states have (on average 4.593959731543624) internal successors, (17797), 3874 states have internal predecessors, (17797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:33:38,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3875 states to 3875 states and 17797 transitions. [2021-06-05 05:33:38,922 INFO L78 Accepts]: Start accepts. Automaton has 3875 states and 17797 transitions. Word has length 27 [2021-06-05 05:33:38,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:33:38,922 INFO L482 AbstractCegarLoop]: Abstraction has 3875 states and 17797 transitions. [2021-06-05 05:33:38,923 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:33:38,923 INFO L276 IsEmpty]: Start isEmpty. Operand 3875 states and 17797 transitions. [2021-06-05 05:33:38,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 05:33:38,945 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:33:38,946 INFO L521 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] [2021-06-05 05:33:38,946 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 05:33:38,946 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:33:38,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:33:38,949 INFO L82 PathProgramCache]: Analyzing trace with hash 469094076, now seen corresponding path program 2 times [2021-06-05 05:33:38,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:33:38,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037802628] [2021-06-05 05:33:38,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:33:38,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:33:38,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:33:38,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:33:38,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037802628] [2021-06-05 05:33:38,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037802628] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:33:38,989 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:33:38,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 05:33:38,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291376193] [2021-06-05 05:33:38,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 05:33:38,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:33:38,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 05:33:38,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 05:33:38,992 INFO L87 Difference]: Start difference. First operand 3875 states and 17797 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:33:39,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:33:39,104 INFO L93 Difference]: Finished difference Result 4814 states and 21965 transitions. [2021-06-05 05:33:39,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 05:33:39,104 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 05:33:39,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:33:39,149 INFO L225 Difference]: With dead ends: 4814 [2021-06-05 05:33:39,150 INFO L226 Difference]: Without dead ends: 3427 [2021-06-05 05:33:39,150 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 05:33:39,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3427 states. [2021-06-05 05:33:39,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3427 to 3427. [2021-06-05 05:33:39,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3427 states, 3426 states have (on average 4.5128429655575015) internal successors, (15461), 3426 states have internal predecessors, (15461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:33:39,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3427 states to 3427 states and 15461 transitions. [2021-06-05 05:33:39,293 INFO L78 Accepts]: Start accepts. Automaton has 3427 states and 15461 transitions. Word has length 27 [2021-06-05 05:33:39,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:33:39,294 INFO L482 AbstractCegarLoop]: Abstraction has 3427 states and 15461 transitions. [2021-06-05 05:33:39,294 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:33:39,295 INFO L276 IsEmpty]: Start isEmpty. Operand 3427 states and 15461 transitions. [2021-06-05 05:33:39,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 05:33:39,306 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:33:39,306 INFO L521 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] [2021-06-05 05:33:39,306 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 05:33:39,306 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:33:39,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:33:39,307 INFO L82 PathProgramCache]: Analyzing trace with hash -1867001510, now seen corresponding path program 3 times [2021-06-05 05:33:39,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:33:39,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126596263] [2021-06-05 05:33:39,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:33:39,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:33:39,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:33:39,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:33:39,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126596263] [2021-06-05 05:33:39,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126596263] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:33:39,411 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:33:39,411 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 05:33:39,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697378898] [2021-06-05 05:33:39,411 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 05:33:39,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:33:39,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 05:33:39,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 05:33:39,412 INFO L87 Difference]: Start difference. First operand 3427 states and 15461 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:33:39,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:33:39,706 INFO L93 Difference]: Finished difference Result 13141 states and 59505 transitions. [2021-06-05 05:33:39,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 05:33:39,707 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 05:33:39,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:33:39,768 INFO L225 Difference]: With dead ends: 13141 [2021-06-05 05:33:39,769 INFO L226 Difference]: Without dead ends: 9627 [2021-06-05 05:33:39,769 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 92.9ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 05:33:39,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9627 states. [2021-06-05 05:33:39,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9627 to 3610. [2021-06-05 05:33:39,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3610 states, 3609 states have (on average 4.5259074535882515) internal successors, (16334), 3609 states have internal predecessors, (16334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:33:40,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3610 states to 3610 states and 16334 transitions. [2021-06-05 05:33:40,001 INFO L78 Accepts]: Start accepts. Automaton has 3610 states and 16334 transitions. Word has length 27 [2021-06-05 05:33:40,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:33:40,047 INFO L482 AbstractCegarLoop]: Abstraction has 3610 states and 16334 transitions. [2021-06-05 05:33:40,047 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:33:40,047 INFO L276 IsEmpty]: Start isEmpty. Operand 3610 states and 16334 transitions. [2021-06-05 05:33:40,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 05:33:40,059 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:33:40,059 INFO L521 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] [2021-06-05 05:33:40,059 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 05:33:40,060 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:33:40,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:33:40,065 INFO L82 PathProgramCache]: Analyzing trace with hash 261207968, now seen corresponding path program 4 times [2021-06-05 05:33:40,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:33:40,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135253080] [2021-06-05 05:33:40,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:33:40,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:33:40,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:33:40,123 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:33:40,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135253080] [2021-06-05 05:33:40,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135253080] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:33:40,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:33:40,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 05:33:40,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620997185] [2021-06-05 05:33:40,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 05:33:40,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:33:40,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 05:33:40,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 05:33:40,126 INFO L87 Difference]: Start difference. First operand 3610 states and 16334 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:33:40,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:33:40,171 INFO L93 Difference]: Finished difference Result 4293 states and 19350 transitions. [2021-06-05 05:33:40,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 05:33:40,171 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 05:33:40,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:33:40,185 INFO L225 Difference]: With dead ends: 4293 [2021-06-05 05:33:40,185 INFO L226 Difference]: Without dead ends: 3354 [2021-06-05 05:33:40,186 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 05:33:40,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3354 states. [2021-06-05 05:33:40,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3354 to 3354. [2021-06-05 05:33:40,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3354 states, 3353 states have (on average 4.470623322397853) internal successors, (14990), 3353 states have internal predecessors, (14990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:33:40,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3354 states to 3354 states and 14990 transitions. [2021-06-05 05:33:40,290 INFO L78 Accepts]: Start accepts. Automaton has 3354 states and 14990 transitions. Word has length 27 [2021-06-05 05:33:40,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:33:40,290 INFO L482 AbstractCegarLoop]: Abstraction has 3354 states and 14990 transitions. [2021-06-05 05:33:40,290 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:33:40,290 INFO L276 IsEmpty]: Start isEmpty. Operand 3354 states and 14990 transitions. [2021-06-05 05:33:40,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:33:40,305 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:33:40,305 INFO L521 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] [2021-06-05 05:33:40,305 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 05:33:40,306 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:33:40,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:33:40,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1411704984, now seen corresponding path program 1 times [2021-06-05 05:33:40,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:33:40,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088263579] [2021-06-05 05:33:40,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:33:40,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:33:40,422 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:33:40,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:33:40,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088263579] [2021-06-05 05:33:40,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088263579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:33:40,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928433469] [2021-06-05 05:33:40,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:33:40,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:33:40,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-05 05:33:40,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:33:40,659 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:33:40,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928433469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:33:40,659 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:33:40,659 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-06-05 05:33:40,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072582779] [2021-06-05 05:33:40,660 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 05:33:40,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:33:40,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 05:33:40,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 05:33:40,661 INFO L87 Difference]: Start difference. First operand 3354 states and 14990 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:33:40,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:33:40,766 INFO L93 Difference]: Finished difference Result 6670 states and 29656 transitions. [2021-06-05 05:33:40,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 05:33:40,767 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:33:40,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:33:40,797 INFO L225 Difference]: With dead ends: 6670 [2021-06-05 05:33:40,798 INFO L226 Difference]: Without dead ends: 6670 [2021-06-05 05:33:40,798 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 25.3ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 05:33:40,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6670 states. [2021-06-05 05:33:40,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6670 to 4206. [2021-06-05 05:33:40,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4206 states, 4205 states have (on average 4.520332936979786) internal successors, (19008), 4205 states have internal predecessors, (19008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:33:41,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4206 states to 4206 states and 19008 transitions. [2021-06-05 05:33:41,013 INFO L78 Accepts]: Start accepts. Automaton has 4206 states and 19008 transitions. Word has length 29 [2021-06-05 05:33:41,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:33:41,013 INFO L482 AbstractCegarLoop]: Abstraction has 4206 states and 19008 transitions. [2021-06-05 05:33:41,013 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:33:41,013 INFO L276 IsEmpty]: Start isEmpty. Operand 4206 states and 19008 transitions. [2021-06-05 05:33:41,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:33:41,024 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:33:41,024 INFO L521 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] [2021-06-05 05:33:41,250 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:33:41,250 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:33:41,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:33:41,250 INFO L82 PathProgramCache]: Analyzing trace with hash 279001500, now seen corresponding path program 1 times [2021-06-05 05:33:41,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:33:41,251 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186318292] [2021-06-05 05:33:41,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:33:41,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:33:41,362 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:33:41,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:33:41,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186318292] [2021-06-05 05:33:41,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186318292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:33:41,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061237433] [2021-06-05 05:33:41,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:33:41,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:33:41,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-05 05:33:41,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:33:41,483 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:33:41,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061237433] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:33:41,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 05:33:41,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2021-06-05 05:33:41,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256361482] [2021-06-05 05:33:41,485 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 05:33:41,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:33:41,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 05:33:41,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-05 05:33:41,485 INFO L87 Difference]: Start difference. First operand 4206 states and 19008 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:33:41,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:33:41,605 INFO L93 Difference]: Finished difference Result 5618 states and 25299 transitions. [2021-06-05 05:33:41,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 05:33:41,606 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:33:41,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:33:41,629 INFO L225 Difference]: With dead ends: 5618 [2021-06-05 05:33:41,629 INFO L226 Difference]: Without dead ends: 5418 [2021-06-05 05:33:41,629 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 54.3ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:33:41,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5418 states. [2021-06-05 05:33:41,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5418 to 4426. [2021-06-05 05:33:41,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4426 states, 4425 states have (on average 4.55864406779661) internal successors, (20172), 4425 states have internal predecessors, (20172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:33:41,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4426 states to 4426 states and 20172 transitions. [2021-06-05 05:33:41,837 INFO L78 Accepts]: Start accepts. Automaton has 4426 states and 20172 transitions. Word has length 29 [2021-06-05 05:33:41,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:33:41,838 INFO L482 AbstractCegarLoop]: Abstraction has 4426 states and 20172 transitions. [2021-06-05 05:33:41,838 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:33:41,838 INFO L276 IsEmpty]: Start isEmpty. Operand 4426 states and 20172 transitions. [2021-06-05 05:33:41,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:33:41,849 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:33:41,849 INFO L521 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] [2021-06-05 05:33:42,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:33:42,065 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:33:42,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:33:42,065 INFO L82 PathProgramCache]: Analyzing trace with hash -614649962, now seen corresponding path program 1 times [2021-06-05 05:33:42,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:33:42,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303887768] [2021-06-05 05:33:42,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:33:42,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:33:42,091 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:33:42,092 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:33:42,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303887768] [2021-06-05 05:33:42,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303887768] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:33:42,095 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:33:42,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 05:33:42,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027630505] [2021-06-05 05:33:42,096 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 05:33:42,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:33:42,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 05:33:42,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 05:33:42,097 INFO L87 Difference]: Start difference. First operand 4426 states and 20172 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:33:42,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:33:42,193 INFO L93 Difference]: Finished difference Result 7946 states and 35321 transitions. [2021-06-05 05:33:42,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 05:33:42,194 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:33:42,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:33:42,220 INFO L225 Difference]: With dead ends: 7946 [2021-06-05 05:33:42,220 INFO L226 Difference]: Without dead ends: 7848 [2021-06-05 05:33:42,220 INFO L777 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 [2021-06-05 05:33:42,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7848 states. [2021-06-05 05:33:42,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7848 to 6434. [2021-06-05 05:33:42,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6434 states, 6433 states have (on average 4.542048810819214) internal successors, (29219), 6433 states have internal predecessors, (29219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:33:42,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6434 states to 6434 states and 29219 transitions. [2021-06-05 05:33:42,505 INFO L78 Accepts]: Start accepts. Automaton has 6434 states and 29219 transitions. Word has length 29 [2021-06-05 05:33:42,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:33:42,505 INFO L482 AbstractCegarLoop]: Abstraction has 6434 states and 29219 transitions. [2021-06-05 05:33:42,505 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:33:42,505 INFO L276 IsEmpty]: Start isEmpty. Operand 6434 states and 29219 transitions. [2021-06-05 05:33:42,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:33:42,524 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:33:42,524 INFO L521 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] [2021-06-05 05:33:42,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-05 05:33:42,524 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:33:42,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:33:42,525 INFO L82 PathProgramCache]: Analyzing trace with hash -970617380, now seen corresponding path program 1 times [2021-06-05 05:33:42,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:33:42,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130964704] [2021-06-05 05:33:42,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:33:42,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:33:42,546 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:33:42,547 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:33:42,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130964704] [2021-06-05 05:33:42,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130964704] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:33:42,547 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:33:42,547 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 05:33:42,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879532277] [2021-06-05 05:33:42,548 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 05:33:42,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:33:42,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 05:33:42,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 05:33:42,548 INFO L87 Difference]: Start difference. First operand 6434 states and 29219 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:33:42,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:33:42,640 INFO L93 Difference]: Finished difference Result 11319 states and 50308 transitions. [2021-06-05 05:33:42,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 05:33:42,641 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:33:42,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:33:42,675 INFO L225 Difference]: With dead ends: 11319 [2021-06-05 05:33:42,675 INFO L226 Difference]: Without dead ends: 11198 [2021-06-05 05:33:42,675 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 05:33:42,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11198 states. [2021-06-05 05:33:43,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11198 to 8925. [2021-06-05 05:33:43,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8925 states, 8924 states have (on average 4.6001792917974) internal successors, (41052), 8924 states have internal predecessors, (41052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:33:43,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8925 states to 8925 states and 41052 transitions. [2021-06-05 05:33:43,131 INFO L78 Accepts]: Start accepts. Automaton has 8925 states and 41052 transitions. Word has length 29 [2021-06-05 05:33:43,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:33:43,131 INFO L482 AbstractCegarLoop]: Abstraction has 8925 states and 41052 transitions. [2021-06-05 05:33:43,132 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:33:43,132 INFO L276 IsEmpty]: Start isEmpty. Operand 8925 states and 41052 transitions. [2021-06-05 05:33:43,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:33:43,157 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:33:43,157 INFO L521 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] [2021-06-05 05:33:43,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-06-05 05:33:43,158 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:33:43,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:33:43,158 INFO L82 PathProgramCache]: Analyzing trace with hash -643441376, now seen corresponding path program 2 times [2021-06-05 05:33:43,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:33:43,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285409394] [2021-06-05 05:33:43,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:33:43,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:33:43,293 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:33:43,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:33:43,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285409394] [2021-06-05 05:33:43,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285409394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:33:43,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329012455] [2021-06-05 05:33:43,294 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:33:43,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:33:43,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:33:43,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 05:33:43,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:33:43,440 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:33:43,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329012455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:33:43,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:33:43,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3] total 8 [2021-06-05 05:33:43,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34508387] [2021-06-05 05:33:43,441 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 05:33:43,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:33:43,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 05:33:43,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-05 05:33:43,442 INFO L87 Difference]: Start difference. First operand 8925 states and 41052 transitions. Second operand has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 8 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:33:44,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:33:44,316 INFO L93 Difference]: Finished difference Result 31957 states and 138250 transitions. [2021-06-05 05:33:44,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 05:33:44,317 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 8 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 29 [2021-06-05 05:33:44,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:33:44,394 INFO L225 Difference]: With dead ends: 31957 [2021-06-05 05:33:44,395 INFO L226 Difference]: Without dead ends: 25190 [2021-06-05 05:33:44,395 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 283.4ms TimeCoverageRelationStatistics Valid=191, Invalid=679, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:33:44,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25190 states. [2021-06-05 05:33:44,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25190 to 11186. [2021-06-05 05:33:44,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11186 states, 11185 states have (on average 4.569959767545821) internal successors, (51115), 11185 states have internal predecessors, (51115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:33:44,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11186 states to 11186 states and 51115 transitions. [2021-06-05 05:33:44,982 INFO L78 Accepts]: Start accepts. Automaton has 11186 states and 51115 transitions. Word has length 29 [2021-06-05 05:33:44,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:33:44,982 INFO L482 AbstractCegarLoop]: Abstraction has 11186 states and 51115 transitions. [2021-06-05 05:33:44,982 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 8 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:33:44,982 INFO L276 IsEmpty]: Start isEmpty. Operand 11186 states and 51115 transitions. [2021-06-05 05:33:45,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:33:45,011 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:33:45,011 INFO L521 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] [2021-06-05 05:33:45,235 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:33:45,236 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:33:45,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:33:45,236 INFO L82 PathProgramCache]: Analyzing trace with hash 896103960, now seen corresponding path program 2 times [2021-06-05 05:33:45,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:33:45,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038972516] [2021-06-05 05:33:45,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:33:45,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:33:45,260 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:33:45,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:33:45,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038972516] [2021-06-05 05:33:45,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038972516] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:33:45,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:33:45,261 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 05:33:45,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76453065] [2021-06-05 05:33:45,261 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 05:33:45,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:33:45,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 05:33:45,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 05:33:45,262 INFO L87 Difference]: Start difference. First operand 11186 states and 51115 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:33:45,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:33:45,523 INFO L93 Difference]: Finished difference Result 13521 states and 60589 transitions. [2021-06-05 05:33:45,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 05:33:45,524 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:33:45,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:33:45,561 INFO L225 Difference]: With dead ends: 13521 [2021-06-05 05:33:45,562 INFO L226 Difference]: Without dead ends: 13281 [2021-06-05 05:33:45,562 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 05:33:45,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13281 states. [2021-06-05 05:33:45,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13281 to 11164. [2021-06-05 05:33:45,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11164 states, 11163 states have (on average 4.55361461972588) internal successors, (50832), 11163 states have internal predecessors, (50832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:33:45,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11164 states to 11164 states and 50832 transitions. [2021-06-05 05:33:45,855 INFO L78 Accepts]: Start accepts. Automaton has 11164 states and 50832 transitions. Word has length 29 [2021-06-05 05:33:45,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:33:45,855 INFO L482 AbstractCegarLoop]: Abstraction has 11164 states and 50832 transitions. [2021-06-05 05:33:45,855 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:33:45,855 INFO L276 IsEmpty]: Start isEmpty. Operand 11164 states and 50832 transitions. [2021-06-05 05:33:46,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:33:46,039 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:33:46,039 INFO L521 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] [2021-06-05 05:33:46,039 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-06-05 05:33:46,039 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:33:46,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:33:46,040 INFO L82 PathProgramCache]: Analyzing trace with hash 644421402, now seen corresponding path program 2 times [2021-06-05 05:33:46,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:33:46,040 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512816823] [2021-06-05 05:33:46,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:33:46,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:33:46,092 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:33:46,092 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:33:46,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512816823] [2021-06-05 05:33:46,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512816823] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:33:46,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:33:46,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 05:33:46,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306231265] [2021-06-05 05:33:46,093 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 05:33:46,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:33:46,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 05:33:46,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 05:33:46,094 INFO L87 Difference]: Start difference. First operand 11164 states and 50832 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:33:46,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:33:46,192 INFO L93 Difference]: Finished difference Result 12568 states and 55860 transitions. [2021-06-05 05:33:46,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 05:33:46,193 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:33:46,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:33:46,232 INFO L225 Difference]: With dead ends: 12568 [2021-06-05 05:33:46,232 INFO L226 Difference]: Without dead ends: 12568 [2021-06-05 05:33:46,233 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.0ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 05:33:46,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12568 states. [2021-06-05 05:33:46,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12568 to 10980. [2021-06-05 05:33:46,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10980 states, 10979 states have (on average 4.559340559249477) internal successors, (50057), 10979 states have internal predecessors, (50057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:33:46,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10980 states to 10980 states and 50057 transitions. [2021-06-05 05:33:46,541 INFO L78 Accepts]: Start accepts. Automaton has 10980 states and 50057 transitions. Word has length 29 [2021-06-05 05:33:46,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:33:46,541 INFO L482 AbstractCegarLoop]: Abstraction has 10980 states and 50057 transitions. [2021-06-05 05:33:46,542 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:33:46,542 INFO L276 IsEmpty]: Start isEmpty. Operand 10980 states and 50057 transitions. [2021-06-05 05:33:46,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:33:46,562 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:33:46,562 INFO L521 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] [2021-06-05 05:33:46,562 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-06-05 05:33:46,562 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:33:46,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:33:46,563 INFO L82 PathProgramCache]: Analyzing trace with hash -759097254, now seen corresponding path program 3 times [2021-06-05 05:33:46,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:33:46,563 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541973067] [2021-06-05 05:33:46,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:33:46,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:33:46,586 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:33:46,587 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:33:46,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541973067] [2021-06-05 05:33:46,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541973067] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:33:46,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:33:46,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 05:33:46,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017763543] [2021-06-05 05:33:46,588 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 05:33:46,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:33:46,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 05:33:46,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 05:33:46,589 INFO L87 Difference]: Start difference. First operand 10980 states and 50057 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:33:46,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:33:46,710 INFO L93 Difference]: Finished difference Result 13957 states and 62115 transitions. [2021-06-05 05:33:46,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 05:33:46,711 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:33:46,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:33:46,762 INFO L225 Difference]: With dead ends: 13957 [2021-06-05 05:33:46,762 INFO L226 Difference]: Without dead ends: 13957 [2021-06-05 05:33:46,762 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.6ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 05:33:46,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13957 states. [2021-06-05 05:33:47,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13957 to 11348. [2021-06-05 05:33:47,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11348 states, 11347 states have (on average 4.560324314796863) internal successors, (51746), 11347 states have internal predecessors, (51746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:33:47,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11348 states to 11348 states and 51746 transitions. [2021-06-05 05:33:47,206 INFO L78 Accepts]: Start accepts. Automaton has 11348 states and 51746 transitions. Word has length 29 [2021-06-05 05:33:47,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:33:47,206 INFO L482 AbstractCegarLoop]: Abstraction has 11348 states and 51746 transitions. [2021-06-05 05:33:47,206 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:33:47,206 INFO L276 IsEmpty]: Start isEmpty. Operand 11348 states and 51746 transitions. [2021-06-05 05:33:47,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:33:47,233 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:33:47,233 INFO L521 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] [2021-06-05 05:33:47,233 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-06-05 05:33:47,233 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:33:47,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:33:47,234 INFO L82 PathProgramCache]: Analyzing trace with hash 1350465982, now seen corresponding path program 4 times [2021-06-05 05:33:47,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:33:47,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305551096] [2021-06-05 05:33:47,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:33:47,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:33:47,260 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:33:47,261 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:33:47,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305551096] [2021-06-05 05:33:47,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305551096] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:33:47,261 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:33:47,261 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 05:33:47,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221473604] [2021-06-05 05:33:47,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 05:33:47,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:33:47,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 05:33:47,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 05:33:47,265 INFO L87 Difference]: Start difference. First operand 11348 states and 51746 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:33:47,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:33:47,395 INFO L93 Difference]: Finished difference Result 15992 states and 69373 transitions. [2021-06-05 05:33:47,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 05:33:47,395 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:33:47,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:33:47,437 INFO L225 Difference]: With dead ends: 15992 [2021-06-05 05:33:47,438 INFO L226 Difference]: Without dead ends: 15751 [2021-06-05 05:33:47,438 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 10.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 05:33:47,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15751 states. [2021-06-05 05:33:47,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15751 to 11284. [2021-06-05 05:33:47,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11284 states, 11283 states have (on average 4.5284055658955955) internal successors, (51094), 11283 states have internal predecessors, (51094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:33:47,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11284 states to 11284 states and 51094 transitions. [2021-06-05 05:33:47,823 INFO L78 Accepts]: Start accepts. Automaton has 11284 states and 51094 transitions. Word has length 29 [2021-06-05 05:33:47,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:33:47,823 INFO L482 AbstractCegarLoop]: Abstraction has 11284 states and 51094 transitions. [2021-06-05 05:33:47,824 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:33:47,824 INFO L276 IsEmpty]: Start isEmpty. Operand 11284 states and 51094 transitions. [2021-06-05 05:33:47,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:33:47,843 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:33:47,843 INFO L521 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] [2021-06-05 05:33:47,843 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-06-05 05:33:47,843 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:33:47,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:33:47,844 INFO L82 PathProgramCache]: Analyzing trace with hash -1688009984, now seen corresponding path program 2 times [2021-06-05 05:33:47,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:33:47,844 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129317137] [2021-06-05 05:33:47,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:33:47,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:33:47,894 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:33:47,895 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:33:47,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129317137] [2021-06-05 05:33:47,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129317137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:33:47,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232035348] [2021-06-05 05:33:47,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:33:47,937 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:33:47,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:33:47,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-05 05:33:47,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:33:47,992 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:33:47,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232035348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:33:47,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:33:47,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3] total 8 [2021-06-05 05:33:47,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345209293] [2021-06-05 05:33:47,993 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 05:33:47,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:33:47,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 05:33:47,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-06-05 05:33:47,993 INFO L87 Difference]: Start difference. First operand 11284 states and 51094 transitions. Second operand has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 8 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:33:49,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:33:49,065 INFO L93 Difference]: Finished difference Result 34532 states and 153051 transitions. [2021-06-05 05:33:49,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 05:33:49,065 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 8 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 29 [2021-06-05 05:33:49,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:33:49,114 INFO L225 Difference]: With dead ends: 34532 [2021-06-05 05:33:49,114 INFO L226 Difference]: Without dead ends: 15158 [2021-06-05 05:33:49,115 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 383.5ms TimeCoverageRelationStatistics Valid=442, Invalid=1364, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:33:49,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15158 states. [2021-06-05 05:33:49,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15158 to 6407. [2021-06-05 05:33:49,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6407 states, 6406 states have (on average 4.431002185451139) internal successors, (28385), 6406 states have internal predecessors, (28385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:33:49,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6407 states to 6407 states and 28385 transitions. [2021-06-05 05:33:49,293 INFO L78 Accepts]: Start accepts. Automaton has 6407 states and 28385 transitions. Word has length 29 [2021-06-05 05:33:49,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:33:49,293 INFO L482 AbstractCegarLoop]: Abstraction has 6407 states and 28385 transitions. [2021-06-05 05:33:49,293 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 8 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:33:49,293 INFO L276 IsEmpty]: Start isEmpty. Operand 6407 states and 28385 transitions. [2021-06-05 05:33:49,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:33:49,306 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:33:49,306 INFO L521 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] [2021-06-05 05:33:49,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:33:49,521 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:33:49,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:33:49,521 INFO L82 PathProgramCache]: Analyzing trace with hash 1375793184, now seen corresponding path program 3 times [2021-06-05 05:33:49,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:33:49,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324881399] [2021-06-05 05:33:49,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:33:49,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:33:49,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:33:49,548 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:33:49,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324881399] [2021-06-05 05:33:49,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324881399] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:33:49,548 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:33:49,548 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 05:33:49,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340573159] [2021-06-05 05:33:49,548 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 05:33:49,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:33:49,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 05:33:49,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 05:33:49,549 INFO L87 Difference]: Start difference. First operand 6407 states and 28385 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:33:49,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:33:49,609 INFO L93 Difference]: Finished difference Result 6967 states and 30444 transitions. [2021-06-05 05:33:49,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 05:33:49,610 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:33:49,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:33:49,625 INFO L225 Difference]: With dead ends: 6967 [2021-06-05 05:33:49,625 INFO L226 Difference]: Without dead ends: 6541 [2021-06-05 05:33:49,625 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 05:33:49,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6541 states. [2021-06-05 05:33:49,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6541 to 5575. [2021-06-05 05:33:49,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5575 states, 5574 states have (on average 4.463939720129171) internal successors, (24882), 5574 states have internal predecessors, (24882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:33:49,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5575 states to 5575 states and 24882 transitions. [2021-06-05 05:33:49,724 INFO L78 Accepts]: Start accepts. Automaton has 5575 states and 24882 transitions. Word has length 29 [2021-06-05 05:33:49,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:33:49,724 INFO L482 AbstractCegarLoop]: Abstraction has 5575 states and 24882 transitions. [2021-06-05 05:33:49,724 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:33:49,724 INFO L276 IsEmpty]: Start isEmpty. Operand 5575 states and 24882 transitions. [2021-06-05 05:33:49,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:33:49,734 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:33:49,735 INFO L521 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] [2021-06-05 05:33:49,735 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-06-05 05:33:49,735 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:33:49,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:33:49,735 INFO L82 PathProgramCache]: Analyzing trace with hash 1588380738, now seen corresponding path program 5 times [2021-06-05 05:33:49,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:33:49,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898821804] [2021-06-05 05:33:49,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:33:49,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:33:49,760 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:33:49,760 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:33:49,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898821804] [2021-06-05 05:33:49,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898821804] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:33:49,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:33:49,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 05:33:49,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709918433] [2021-06-05 05:33:49,761 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 05:33:49,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:33:49,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 05:33:49,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 05:33:49,761 INFO L87 Difference]: Start difference. First operand 5575 states and 24882 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:33:49,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:33:49,972 INFO L93 Difference]: Finished difference Result 5778 states and 25550 transitions. [2021-06-05 05:33:49,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 05:33:49,972 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:33:49,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:33:49,986 INFO L225 Difference]: With dead ends: 5778 [2021-06-05 05:33:49,986 INFO L226 Difference]: Without dead ends: 5413 [2021-06-05 05:33:49,986 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.9ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 05:33:49,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5413 states. [2021-06-05 05:33:50,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5413 to 5186. [2021-06-05 05:33:50,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5186 states, 5185 states have (on average 4.515911282545805) internal successors, (23415), 5185 states have internal predecessors, (23415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:33:50,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5186 states to 5186 states and 23415 transitions. [2021-06-05 05:33:50,091 INFO L78 Accepts]: Start accepts. Automaton has 5186 states and 23415 transitions. Word has length 29 [2021-06-05 05:33:50,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:33:50,092 INFO L482 AbstractCegarLoop]: Abstraction has 5186 states and 23415 transitions. [2021-06-05 05:33:50,092 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:33:50,092 INFO L276 IsEmpty]: Start isEmpty. Operand 5186 states and 23415 transitions. [2021-06-05 05:33:50,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:33:50,104 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:33:50,104 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:33:50,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-06-05 05:33:50,104 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:33:50,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:33:50,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1089947996, now seen corresponding path program 1 times [2021-06-05 05:33:50,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:33:50,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125055036] [2021-06-05 05:33:50,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:33:50,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:33:50,229 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:33:50,229 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:33:50,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125055036] [2021-06-05 05:33:50,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125055036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:33:50,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749372140] [2021-06-05 05:33:50,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:33:50,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:33:50,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-05 05:33:50,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:33:50,333 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 05:33:50,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749372140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:33:50,333 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:33:50,333 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 3] total 10 [2021-06-05 05:33:50,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200101233] [2021-06-05 05:33:50,334 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 05:33:50,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:33:50,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 05:33:50,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:33:50,334 INFO L87 Difference]: Start difference. First operand 5186 states and 23415 transitions. Second operand has 11 states, 11 states have (on average 5.909090909090909) internal successors, (65), 10 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:33:51,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:33:51,285 INFO L93 Difference]: Finished difference Result 18525 states and 84293 transitions. [2021-06-05 05:33:51,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 05:33:51,286 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.909090909090909) internal successors, (65), 10 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:33:51,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:33:51,317 INFO L225 Difference]: With dead ends: 18525 [2021-06-05 05:33:51,317 INFO L226 Difference]: Without dead ends: 11569 [2021-06-05 05:33:51,318 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 508.8ms TimeCoverageRelationStatistics Valid=314, Invalid=1326, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 05:33:51,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11569 states. [2021-06-05 05:33:51,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11569 to 6899. [2021-06-05 05:33:51,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6899 states, 6898 states have (on average 4.447521020585677) internal successors, (30679), 6898 states have internal predecessors, (30679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:33:51,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6899 states to 6899 states and 30679 transitions. [2021-06-05 05:33:51,595 INFO L78 Accepts]: Start accepts. Automaton has 6899 states and 30679 transitions. Word has length 33 [2021-06-05 05:33:51,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:33:51,595 INFO L482 AbstractCegarLoop]: Abstraction has 6899 states and 30679 transitions. [2021-06-05 05:33:51,595 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.909090909090909) internal successors, (65), 10 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:33:51,595 INFO L276 IsEmpty]: Start isEmpty. Operand 6899 states and 30679 transitions. [2021-06-05 05:33:51,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 05:33:51,607 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:33:51,607 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:33:51,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 05:33:51,808 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:33:51,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:33:51,809 INFO L82 PathProgramCache]: Analyzing trace with hash 2087262130, now seen corresponding path program 1 times [2021-06-05 05:33:51,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:33:51,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773676367] [2021-06-05 05:33:51,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:33:51,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:33:51,880 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 05:33:51,880 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:33:51,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773676367] [2021-06-05 05:33:51,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773676367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:33:51,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634642819] [2021-06-05 05:33:51,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:33:51,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:33:51,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 05:33:51,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:33:51,998 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 [2021-06-05 05:33:51,999 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:33:52,001 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:33:52,001 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:33:52,002 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:3 [2021-06-05 05:33:52,042 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 05:33:52,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634642819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:33:52,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:33:52,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-05 05:33:52,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17381017] [2021-06-05 05:33:52,044 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 05:33:52,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:33:52,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 05:33:52,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-05 05:33:52,044 INFO L87 Difference]: Start difference. First operand 6899 states and 30679 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:33:52,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:33:52,232 INFO L93 Difference]: Finished difference Result 13711 states and 61754 transitions. [2021-06-05 05:33:52,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 05:33:52,233 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 05:33:52,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:33:52,258 INFO L225 Difference]: With dead ends: 13711 [2021-06-05 05:33:52,258 INFO L226 Difference]: Without dead ends: 8117 [2021-06-05 05:33:52,259 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 73.8ms TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:33:52,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8117 states. [2021-06-05 05:33:52,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8117 to 6184. [2021-06-05 05:33:52,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6184 states, 6183 states have (on average 4.44088630114831) internal successors, (27458), 6183 states have internal predecessors, (27458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:33:52,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6184 states to 6184 states and 27458 transitions. [2021-06-05 05:33:52,414 INFO L78 Accepts]: Start accepts. Automaton has 6184 states and 27458 transitions. Word has length 35 [2021-06-05 05:33:52,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:33:52,414 INFO L482 AbstractCegarLoop]: Abstraction has 6184 states and 27458 transitions. [2021-06-05 05:33:52,414 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:33:52,414 INFO L276 IsEmpty]: Start isEmpty. Operand 6184 states and 27458 transitions. [2021-06-05 05:33:52,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 05:33:52,424 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:33:52,424 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:33:52,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-05 05:33:52,625 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:33:52,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:33:52,625 INFO L82 PathProgramCache]: Analyzing trace with hash 656959038, now seen corresponding path program 2 times [2021-06-05 05:33:52,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:33:52,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377236801] [2021-06-05 05:33:52,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:33:52,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:33:52,773 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 05:33:52,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:33:52,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377236801] [2021-06-05 05:33:52,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377236801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:33:52,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406521521] [2021-06-05 05:33:52,774 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:33:52,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:33:52,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:33:52,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 05:33:52,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:33:52,888 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 [2021-06-05 05:33:52,890 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:33:52,891 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:33:52,892 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:33:52,892 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:3 [2021-06-05 05:33:52,928 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 05:33:52,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406521521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:33:52,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:33:52,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 05:33:52,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582212267] [2021-06-05 05:33:52,929 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 05:33:52,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:33:52,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 05:33:52,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:33:52,930 INFO L87 Difference]: Start difference. First operand 6184 states and 27458 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:33:53,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:33:53,435 INFO L93 Difference]: Finished difference Result 16542 states and 75355 transitions. [2021-06-05 05:33:53,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 05:33:53,436 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 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 35 [2021-06-05 05:33:53,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:33:53,459 INFO L225 Difference]: With dead ends: 16542 [2021-06-05 05:33:53,459 INFO L226 Difference]: Without dead ends: 9202 [2021-06-05 05:33:53,459 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 253.8ms TimeCoverageRelationStatistics Valid=159, Invalid=393, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:33:53,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9202 states. [2021-06-05 05:33:53,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9202 to 6580. [2021-06-05 05:33:53,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6580 states, 6579 states have (on average 4.455692354461164) internal successors, (29314), 6579 states have internal predecessors, (29314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:33:53,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6580 states to 6580 states and 29314 transitions. [2021-06-05 05:33:53,584 INFO L78 Accepts]: Start accepts. Automaton has 6580 states and 29314 transitions. Word has length 35 [2021-06-05 05:33:53,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:33:53,584 INFO L482 AbstractCegarLoop]: Abstraction has 6580 states and 29314 transitions. [2021-06-05 05:33:53,584 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:33:53,584 INFO L276 IsEmpty]: Start isEmpty. Operand 6580 states and 29314 transitions. [2021-06-05 05:33:53,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 05:33:53,596 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:33:53,596 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:33:53,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:33:53,797 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:33:53,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:33:53,797 INFO L82 PathProgramCache]: Analyzing trace with hash 806131838, now seen corresponding path program 3 times [2021-06-05 05:33:53,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:33:53,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572054814] [2021-06-05 05:33:53,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:33:53,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:33:53,937 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:33:53,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:33:53,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572054814] [2021-06-05 05:33:53,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572054814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:33:53,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274034166] [2021-06-05 05:33:53,937 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:33:53,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:33:53,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:33:53,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 05:33:53,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:33:54,057 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 [2021-06-05 05:33:54,059 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:33:54,064 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:33:54,065 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:33:54,065 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:14 [2021-06-05 05:33:54,084 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 18 treesize of output 13 [2021-06-05 05:33:54,086 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:33:54,089 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:33:54,089 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:33:54,090 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:9 [2021-06-05 05:33:54,131 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 [2021-06-05 05:33:54,133 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:33:54,135 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:33:54,135 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:33:54,135 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:3 [2021-06-05 05:33:54,158 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:33:54,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274034166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:33:54,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:33:54,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 05:33:54,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372937529] [2021-06-05 05:33:54,159 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:33:54,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:33:54,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:33:54,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:33:54,160 INFO L87 Difference]: Start difference. First operand 6580 states and 29314 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:33:54,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:33:54,451 INFO L93 Difference]: Finished difference Result 12638 states and 57079 transitions. [2021-06-05 05:33:54,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 05:33:54,452 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 05:33:54,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:33:54,469 INFO L225 Difference]: With dead ends: 12638 [2021-06-05 05:33:54,469 INFO L226 Difference]: Without dead ends: 6958 [2021-06-05 05:33:54,469 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 190.8ms TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:33:54,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6958 states. [2021-06-05 05:33:54,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6958 to 6767. [2021-06-05 05:33:54,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6767 states, 6766 states have (on average 4.428909252143068) internal successors, (29966), 6766 states have internal predecessors, (29966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:33:54,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6767 states to 6767 states and 29966 transitions. [2021-06-05 05:33:54,582 INFO L78 Accepts]: Start accepts. Automaton has 6767 states and 29966 transitions. Word has length 35 [2021-06-05 05:33:54,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:33:54,582 INFO L482 AbstractCegarLoop]: Abstraction has 6767 states and 29966 transitions. [2021-06-05 05:33:54,582 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:33:54,582 INFO L276 IsEmpty]: Start isEmpty. Operand 6767 states and 29966 transitions. [2021-06-05 05:33:54,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 05:33:54,594 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:33:54,594 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:33:54,794 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:33:54,794 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:33:54,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:33:54,795 INFO L82 PathProgramCache]: Analyzing trace with hash 704592580, now seen corresponding path program 4 times [2021-06-05 05:33:54,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:33:54,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711075738] [2021-06-05 05:33:54,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:33:54,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:33:54,947 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:33:54,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:33:54,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711075738] [2021-06-05 05:33:54,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711075738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:33:54,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718380006] [2021-06-05 05:33:54,948 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:33:54,990 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:33:54,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:33:54,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 05:33:54,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:33:55,061 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 [2021-06-05 05:33:55,063 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:33:55,067 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:33:55,068 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:33:55,068 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:14 [2021-06-05 05:33:55,113 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 23 treesize of output 16 [2021-06-05 05:33:55,114 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:33:55,119 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:33:55,120 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:33:55,120 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:16 [2021-06-05 05:33:55,156 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 [2021-06-05 05:33:55,158 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:33:55,159 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:33:55,160 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:33:55,160 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:3 [2021-06-05 05:33:55,193 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:33:55,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718380006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:33:55,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:33:55,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 05:33:55,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649284944] [2021-06-05 05:33:55,194 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 05:33:55,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:33:55,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 05:33:55,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:33:55,195 INFO L87 Difference]: Start difference. First operand 6767 states and 29966 transitions. Second operand has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:33:55,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:33:55,625 INFO L93 Difference]: Finished difference Result 16561 states and 74831 transitions. [2021-06-05 05:33:55,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 05:33:55,626 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 05:33:55,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:33:55,644 INFO L225 Difference]: With dead ends: 16561 [2021-06-05 05:33:55,645 INFO L226 Difference]: Without dead ends: 6962 [2021-06-05 05:33:55,645 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 195.4ms TimeCoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:33:55,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6962 states. [2021-06-05 05:33:55,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6962 to 6907. [2021-06-05 05:33:55,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6907 states, 6906 states have (on average 4.406602953953084) internal successors, (30432), 6906 states have internal predecessors, (30432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:33:55,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6907 states to 6907 states and 30432 transitions. [2021-06-05 05:33:55,783 INFO L78 Accepts]: Start accepts. Automaton has 6907 states and 30432 transitions. Word has length 35 [2021-06-05 05:33:55,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:33:55,784 INFO L482 AbstractCegarLoop]: Abstraction has 6907 states and 30432 transitions. [2021-06-05 05:33:55,784 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:33:55,784 INFO L276 IsEmpty]: Start isEmpty. Operand 6907 states and 30432 transitions. [2021-06-05 05:33:55,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 05:33:55,800 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:33:55,800 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:33:56,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:33:56,013 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:33:56,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:33:56,013 INFO L82 PathProgramCache]: Analyzing trace with hash -655466104, now seen corresponding path program 5 times [2021-06-05 05:33:56,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:33:56,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806309253] [2021-06-05 05:33:56,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:33:56,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:33:56,193 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:33:56,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:33:56,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806309253] [2021-06-05 05:33:56,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806309253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:33:56,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121310986] [2021-06-05 05:33:56,194 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:33:56,253 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:33:56,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:33:56,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:33:56,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:33:56,404 INFO L354 Elim1Store]: treesize reduction 12, result has 60.0 percent of original size [2021-06-05 05:33:56,404 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 16 treesize of output 28 [2021-06-05 05:33:56,424 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:33:56,453 INFO L628 ElimStorePlain]: treesize reduction 15, result has 66.7 percent of original size [2021-06-05 05:33:56,460 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:33:56,460 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:28 [2021-06-05 05:33:56,501 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 18 treesize of output 13 [2021-06-05 05:33:56,503 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:33:56,509 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:33:56,510 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:33:56,511 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:17 [2021-06-05 05:33:56,589 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 [2021-06-05 05:33:56,591 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:33:56,593 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:33:56,593 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:33:56,593 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:3 [2021-06-05 05:33:56,616 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:33:56,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121310986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:33:56,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:33:56,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 05:33:56,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604736094] [2021-06-05 05:33:56,619 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:33:56,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:33:56,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:33:56,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:33:56,620 INFO L87 Difference]: Start difference. First operand 6907 states and 30432 transitions. Second operand has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:33:57,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:33:57,349 INFO L93 Difference]: Finished difference Result 20574 states and 92411 transitions. [2021-06-05 05:33:57,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:33:57,350 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 05:33:57,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:33:57,385 INFO L225 Difference]: With dead ends: 20574 [2021-06-05 05:33:57,385 INFO L226 Difference]: Without dead ends: 13086 [2021-06-05 05:33:57,385 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 461.0ms TimeCoverageRelationStatistics Valid=182, Invalid=688, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:33:57,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13086 states. [2021-06-05 05:33:57,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13086 to 8827. [2021-06-05 05:33:57,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8827 states, 8826 states have (on average 4.414343983684568) internal successors, (38961), 8826 states have internal predecessors, (38961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:33:57,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8827 states to 8827 states and 38961 transitions. [2021-06-05 05:33:57,596 INFO L78 Accepts]: Start accepts. Automaton has 8827 states and 38961 transitions. Word has length 35 [2021-06-05 05:33:57,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:33:57,597 INFO L482 AbstractCegarLoop]: Abstraction has 8827 states and 38961 transitions. [2021-06-05 05:33:57,597 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:33:57,597 INFO L276 IsEmpty]: Start isEmpty. Operand 8827 states and 38961 transitions. [2021-06-05 05:33:57,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 05:33:57,613 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:33:57,613 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:33:57,813 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:33:57,814 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:33:57,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:33:57,814 INFO L82 PathProgramCache]: Analyzing trace with hash -1573443372, now seen corresponding path program 6 times [2021-06-05 05:33:57,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:33:57,814 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215350049] [2021-06-05 05:33:57,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:33:57,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:33:57,958 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:33:57,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:33:57,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215350049] [2021-06-05 05:33:57,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215350049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:33:57,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318535985] [2021-06-05 05:33:57,959 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:33:58,013 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:33:58,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:33:58,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 05:33:58,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:33:58,078 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 [2021-06-05 05:33:58,079 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:33:58,083 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:33:58,084 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:33:58,084 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:11 [2021-06-05 05:33:58,124 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 [2021-06-05 05:33:58,127 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:33:58,128 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:33:58,129 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:33:58,129 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:5 [2021-06-05 05:33:58,154 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:33:58,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318535985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:33:58,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:33:58,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 05:33:58,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652744502] [2021-06-05 05:33:58,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 05:33:58,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:33:58,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 05:33:58,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:33:58,155 INFO L87 Difference]: Start difference. First operand 8827 states and 38961 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:33:58,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:33:58,485 INFO L93 Difference]: Finished difference Result 18175 states and 81358 transitions. [2021-06-05 05:33:58,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 05:33:58,486 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 05:33:58,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:33:58,519 INFO L225 Difference]: With dead ends: 18175 [2021-06-05 05:33:58,519 INFO L226 Difference]: Without dead ends: 12305 [2021-06-05 05:33:58,520 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 202.0ms TimeCoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:33:58,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12305 states. [2021-06-05 05:33:58,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12305 to 8940. [2021-06-05 05:33:58,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8940 states, 8939 states have (on average 4.425327217809598) internal successors, (39558), 8939 states have internal predecessors, (39558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:33:58,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8940 states to 8940 states and 39558 transitions. [2021-06-05 05:33:58,730 INFO L78 Accepts]: Start accepts. Automaton has 8940 states and 39558 transitions. Word has length 35 [2021-06-05 05:33:58,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:33:58,730 INFO L482 AbstractCegarLoop]: Abstraction has 8940 states and 39558 transitions. [2021-06-05 05:33:58,730 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:33:58,730 INFO L276 IsEmpty]: Start isEmpty. Operand 8940 states and 39558 transitions. [2021-06-05 05:33:58,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:33:58,746 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:33:58,746 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:33:58,946 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-05 05:33:58,947 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:33:58,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:33:58,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1795565672, now seen corresponding path program 7 times [2021-06-05 05:33:58,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:33:58,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472408215] [2021-06-05 05:33:58,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:33:58,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:33:58,975 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:33:58,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:33:58,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472408215] [2021-06-05 05:33:58,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472408215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:33:58,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988635643] [2021-06-05 05:33:58,976 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:33:59,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:33:59,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 05:33:59,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:33:59,117 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:33:59,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988635643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:33:59,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:33:59,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 05:33:59,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626507434] [2021-06-05 05:33:59,117 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 05:33:59,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:33:59,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 05:33:59,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 05:33:59,118 INFO L87 Difference]: Start difference. First operand 8940 states and 39558 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) [2021-06-05 05:33:59,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:33:59,282 INFO L93 Difference]: Finished difference Result 15793 states and 70284 transitions. [2021-06-05 05:33:59,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 05:33:59,283 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 [2021-06-05 05:33:59,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:33:59,325 INFO L225 Difference]: With dead ends: 15793 [2021-06-05 05:33:59,325 INFO L226 Difference]: Without dead ends: 15704 [2021-06-05 05:33:59,325 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 35.8ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:33:59,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15704 states. [2021-06-05 05:33:59,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15704 to 12260. [2021-06-05 05:33:59,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12260 states, 12259 states have (on average 4.546210947059303) internal successors, (55732), 12259 states have internal predecessors, (55732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:33:59,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12260 states to 12260 states and 55732 transitions. [2021-06-05 05:33:59,598 INFO L78 Accepts]: Start accepts. Automaton has 12260 states and 55732 transitions. Word has length 37 [2021-06-05 05:33:59,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:33:59,598 INFO L482 AbstractCegarLoop]: Abstraction has 12260 states and 55732 transitions. [2021-06-05 05:33:59,598 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) [2021-06-05 05:33:59,598 INFO L276 IsEmpty]: Start isEmpty. Operand 12260 states and 55732 transitions. [2021-06-05 05:33:59,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:33:59,620 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:33:59,621 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:33:59,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-05 05:33:59,821 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:33:59,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:33:59,822 INFO L82 PathProgramCache]: Analyzing trace with hash -1240261048, now seen corresponding path program 8 times [2021-06-05 05:33:59,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:33:59,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478668315] [2021-06-05 05:33:59,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:33:59,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:33:59,855 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:33:59,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:33:59,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478668315] [2021-06-05 05:33:59,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478668315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:33:59,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850777313] [2021-06-05 05:33:59,856 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:33:59,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:33:59,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:33:59,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 05:33:59,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:34:00,003 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:34:00,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850777313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:34:00,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:34:00,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-06-05 05:34:00,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926891638] [2021-06-05 05:34:00,004 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 05:34:00,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:34:00,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 05:34:00,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:34:00,007 INFO L87 Difference]: Start difference. First operand 12260 states and 55732 transitions. Second operand has 10 states, 10 states have (on average 6.3) internal successors, (63), 9 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:34:00,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:34:00,772 INFO L93 Difference]: Finished difference Result 42266 states and 186131 transitions. [2021-06-05 05:34:00,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 05:34:00,772 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.3) internal successors, (63), 9 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 37 [2021-06-05 05:34:00,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:34:00,890 INFO L225 Difference]: With dead ends: 42266 [2021-06-05 05:34:00,890 INFO L226 Difference]: Without dead ends: 42266 [2021-06-05 05:34:00,891 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 684 ImplicationChecksByTransitivity, 350.7ms TimeCoverageRelationStatistics Valid=475, Invalid=1595, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 05:34:00,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42266 states. [2021-06-05 05:34:01,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42266 to 18104. [2021-06-05 05:34:01,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18104 states, 18103 states have (on average 4.676959619952494) internal successors, (84667), 18103 states have internal predecessors, (84667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:34:01,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18104 states to 18104 states and 84667 transitions. [2021-06-05 05:34:01,610 INFO L78 Accepts]: Start accepts. Automaton has 18104 states and 84667 transitions. Word has length 37 [2021-06-05 05:34:01,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:34:01,610 INFO L482 AbstractCegarLoop]: Abstraction has 18104 states and 84667 transitions. [2021-06-05 05:34:01,610 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 6.3) internal successors, (63), 9 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:34:01,610 INFO L276 IsEmpty]: Start isEmpty. Operand 18104 states and 84667 transitions. [2021-06-05 05:34:01,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:34:01,646 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:34:01,646 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:34:01,846 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-05 05:34:01,846 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:34:01,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:34:01,847 INFO L82 PathProgramCache]: Analyzing trace with hash 791244466, now seen corresponding path program 9 times [2021-06-05 05:34:01,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:34:01,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885987817] [2021-06-05 05:34:01,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:34:01,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:34:01,878 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:34:01,879 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:34:01,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885987817] [2021-06-05 05:34:01,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885987817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:34:01,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644747922] [2021-06-05 05:34:01,879 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:34:01,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 05:34:01,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:34:01,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 05:34:01,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:34:01,986 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 05:34:01,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644747922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:34:01,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:34:01,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2021-06-05 05:34:01,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960394996] [2021-06-05 05:34:01,987 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 05:34:01,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:34:01,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 05:34:01,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 05:34:01,987 INFO L87 Difference]: Start difference. First operand 18104 states and 84667 transitions. Second operand has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:34:02,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:34:02,410 INFO L93 Difference]: Finished difference Result 36229 states and 162668 transitions. [2021-06-05 05:34:02,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 05:34:02,411 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have 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 [2021-06-05 05:34:02,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:34:02,518 INFO L225 Difference]: With dead ends: 36229 [2021-06-05 05:34:02,518 INFO L226 Difference]: Without dead ends: 36052 [2021-06-05 05:34:02,519 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 107.0ms TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:34:02,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36052 states. [2021-06-05 05:34:03,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36052 to 20234. [2021-06-05 05:34:03,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20234 states, 20233 states have (on average 4.776750852567588) internal successors, (96648), 20233 states have internal predecessors, (96648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:34:03,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20234 states to 20234 states and 96648 transitions. [2021-06-05 05:34:03,178 INFO L78 Accepts]: Start accepts. Automaton has 20234 states and 96648 transitions. Word has length 37 [2021-06-05 05:34:03,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:34:03,178 INFO L482 AbstractCegarLoop]: Abstraction has 20234 states and 96648 transitions. [2021-06-05 05:34:03,178 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:34:03,178 INFO L276 IsEmpty]: Start isEmpty. Operand 20234 states and 96648 transitions. [2021-06-05 05:34:03,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:34:03,223 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:34:03,223 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:34:03,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:34:03,425 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:34:03,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:34:03,425 INFO L82 PathProgramCache]: Analyzing trace with hash 326699396, now seen corresponding path program 10 times [2021-06-05 05:34:03,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:34:03,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813603395] [2021-06-05 05:34:03,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:34:03,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:34:03,461 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:34:03,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:34:03,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813603395] [2021-06-05 05:34:03,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813603395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:34:03,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542492586] [2021-06-05 05:34:03,462 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:34:03,506 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:34:03,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:34:03,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 05:34:03,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:34:03,565 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:34:03,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542492586] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:34:03,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:34:03,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 05:34:03,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213534718] [2021-06-05 05:34:03,566 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 05:34:03,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:34:03,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 05:34:03,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 05:34:03,567 INFO L87 Difference]: Start difference. First operand 20234 states and 96648 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:34:03,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:34:03,806 INFO L93 Difference]: Finished difference Result 26645 states and 124196 transitions. [2021-06-05 05:34:03,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 05:34:03,817 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 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 37 [2021-06-05 05:34:03,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:34:03,930 INFO L225 Difference]: With dead ends: 26645 [2021-06-05 05:34:03,931 INFO L226 Difference]: Without dead ends: 26645 [2021-06-05 05:34:03,931 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 44.7ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:34:03,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26645 states. [2021-06-05 05:34:04,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26645 to 22646. [2021-06-05 05:34:04,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22646 states, 22645 states have (on average 4.74435857805255) internal successors, (107436), 22645 states have internal predecessors, (107436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:34:04,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22646 states to 22646 states and 107436 transitions. [2021-06-05 05:34:04,589 INFO L78 Accepts]: Start accepts. Automaton has 22646 states and 107436 transitions. Word has length 37 [2021-06-05 05:34:04,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:34:04,589 INFO L482 AbstractCegarLoop]: Abstraction has 22646 states and 107436 transitions. [2021-06-05 05:34:04,590 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:34:04,590 INFO L276 IsEmpty]: Start isEmpty. Operand 22646 states and 107436 transitions. [2021-06-05 05:34:04,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:34:04,637 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:34:04,637 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:34:04,837 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-05 05:34:04,838 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:34:04,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:34:04,838 INFO L82 PathProgramCache]: Analyzing trace with hash 2135418304, now seen corresponding path program 11 times [2021-06-05 05:34:04,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:34:04,838 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641841128] [2021-06-05 05:34:04,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:34:04,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:34:04,864 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 05:34:04,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:34:04,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641841128] [2021-06-05 05:34:04,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641841128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:34:04,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937201507] [2021-06-05 05:34:04,865 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:34:04,906 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:34:04,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:34:04,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 05:34:04,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:34:04,990 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 05:34:04,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937201507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:34:04,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:34:04,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-06-05 05:34:04,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285451478] [2021-06-05 05:34:04,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 05:34:04,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:34:04,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 05:34:04,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:34:04,992 INFO L87 Difference]: Start difference. First operand 22646 states and 107436 transitions. Second operand has 10 states, 10 states have (on average 6.1) internal successors, (61), 9 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:34:05,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:34:05,964 INFO L93 Difference]: Finished difference Result 70509 states and 338891 transitions. [2021-06-05 05:34:05,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:34:05,965 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.1) internal successors, (61), 9 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 37 [2021-06-05 05:34:05,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:34:06,214 INFO L225 Difference]: With dead ends: 70509 [2021-06-05 05:34:06,214 INFO L226 Difference]: Without dead ends: 65301 [2021-06-05 05:34:06,214 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 255.7ms TimeCoverageRelationStatistics Valid=258, Invalid=798, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:34:06,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65301 states. [2021-06-05 05:34:07,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65301 to 40472. [2021-06-05 05:34:07,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40472 states, 40471 states have (on average 4.977242964097749) internal successors, (201434), 40471 states have internal predecessors, (201434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:34:07,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40472 states to 40472 states and 201434 transitions. [2021-06-05 05:34:07,473 INFO L78 Accepts]: Start accepts. Automaton has 40472 states and 201434 transitions. Word has length 37 [2021-06-05 05:34:07,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:34:07,473 INFO L482 AbstractCegarLoop]: Abstraction has 40472 states and 201434 transitions. [2021-06-05 05:34:07,473 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 6.1) internal successors, (61), 9 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:34:07,473 INFO L276 IsEmpty]: Start isEmpty. Operand 40472 states and 201434 transitions. [2021-06-05 05:34:07,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 05:34:07,565 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:34:07,565 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:34:07,766 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:34:07,769 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:34:07,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:34:07,770 INFO L82 PathProgramCache]: Analyzing trace with hash 872303840, now seen corresponding path program 12 times [2021-06-05 05:34:07,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:34:07,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314999176] [2021-06-05 05:34:07,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:34:07,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:34:07,836 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 05:34:07,836 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:34:07,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314999176] [2021-06-05 05:34:07,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314999176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:34:07,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887263763] [2021-06-05 05:34:07,836 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:34:07,884 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:34:07,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:34:07,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 05:34:07,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:34:07,967 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 05:34:07,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887263763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:34:07,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:34:07,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 05:34:07,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310806139] [2021-06-05 05:34:07,969 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 05:34:07,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:34:07,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 05:34:07,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-05 05:34:07,970 INFO L87 Difference]: Start difference. First operand 40472 states and 201434 transitions. Second operand has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:34:09,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:34:09,126 INFO L93 Difference]: Finished difference Result 105615 states and 523706 transitions. [2021-06-05 05:34:09,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 05:34:09,127 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have 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 [2021-06-05 05:34:09,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:34:09,569 INFO L225 Difference]: With dead ends: 105615 [2021-06-05 05:34:09,569 INFO L226 Difference]: Without dead ends: 105615 [2021-06-05 05:34:09,569 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 128.4ms TimeCoverageRelationStatistics Valid=111, Invalid=269, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:34:09,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105615 states. [2021-06-05 05:34:12,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105615 to 55540. [2021-06-05 05:34:12,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55540 states, 55539 states have (on average 5.127676047462144) internal successors, (284786), 55539 states have internal predecessors, (284786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:34:12,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55540 states to 55540 states and 284786 transitions. [2021-06-05 05:34:12,710 INFO L78 Accepts]: Start accepts. Automaton has 55540 states and 284786 transitions. Word has length 39 [2021-06-05 05:34:12,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:34:12,710 INFO L482 AbstractCegarLoop]: Abstraction has 55540 states and 284786 transitions. [2021-06-05 05:34:12,710 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:34:12,711 INFO L276 IsEmpty]: Start isEmpty. Operand 55540 states and 284786 transitions. [2021-06-05 05:34:12,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 05:34:12,860 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:34:12,861 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:34:13,061 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-06-05 05:34:13,061 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:34:13,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:34:13,062 INFO L82 PathProgramCache]: Analyzing trace with hash 145309698, now seen corresponding path program 13 times [2021-06-05 05:34:13,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:34:13,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401665356] [2021-06-05 05:34:13,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:34:13,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:34:13,101 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 05:34:13,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:34:13,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401665356] [2021-06-05 05:34:13,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401665356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:34:13,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781513601] [2021-06-05 05:34:13,102 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:34:13,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:34:13,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 05:34:13,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:34:13,221 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 05:34:13,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781513601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:34:13,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:34:13,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 05:34:13,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345852327] [2021-06-05 05:34:13,222 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 05:34:13,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:34:13,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 05:34:13,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 05:34:13,223 INFO L87 Difference]: Start difference. First operand 55540 states and 284786 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) [2021-06-05 05:34:14,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:34:14,543 INFO L93 Difference]: Finished difference Result 113105 states and 582051 transitions. [2021-06-05 05:34:14,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 05:34:14,544 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 39 [2021-06-05 05:34:14,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:34:15,014 INFO L225 Difference]: With dead ends: 113105 [2021-06-05 05:34:15,014 INFO L226 Difference]: Without dead ends: 112969 [2021-06-05 05:34:15,014 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 38.7ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:34:15,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112969 states. [2021-06-05 05:34:17,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112969 to 87675. [2021-06-05 05:34:17,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87675 states, 87674 states have (on average 5.334614594976846) internal successors, (467707), 87674 states have internal predecessors, (467707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:34:18,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87675 states to 87675 states and 467707 transitions. [2021-06-05 05:34:18,438 INFO L78 Accepts]: Start accepts. Automaton has 87675 states and 467707 transitions. Word has length 39 [2021-06-05 05:34:18,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:34:18,438 INFO L482 AbstractCegarLoop]: Abstraction has 87675 states and 467707 transitions. [2021-06-05 05:34:18,438 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) [2021-06-05 05:34:18,438 INFO L276 IsEmpty]: Start isEmpty. Operand 87675 states and 467707 transitions. [2021-06-05 05:34:19,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 05:34:19,413 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:34:19,413 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:34:19,614 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-06-05 05:34:19,614 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:34:19,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:34:19,614 INFO L82 PathProgramCache]: Analyzing trace with hash 478037506, now seen corresponding path program 14 times [2021-06-05 05:34:19,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:34:19,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388714546] [2021-06-05 05:34:19,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:34:19,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:34:19,642 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 05:34:19,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:34:19,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388714546] [2021-06-05 05:34:19,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388714546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:34:19,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222647489] [2021-06-05 05:34:19,643 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:34:19,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:34:19,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:34:19,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 05:34:19,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:34:19,728 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 05:34:19,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222647489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:34:19,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:34:19,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-05 05:34:19,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735906364] [2021-06-05 05:34:19,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 05:34:19,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:34:19,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 05:34:19,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 05:34:19,729 INFO L87 Difference]: Start difference. First operand 87675 states and 467707 transitions. Second operand has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:34:22,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:34:22,306 INFO L93 Difference]: Finished difference Result 204587 states and 1085617 transitions. [2021-06-05 05:34:22,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 05:34:22,314 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 5 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 39 [2021-06-05 05:34:22,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:34:23,376 INFO L225 Difference]: With dead ends: 204587 [2021-06-05 05:34:23,377 INFO L226 Difference]: Without dead ends: 200668 [2021-06-05 05:34:23,377 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 19.6ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 05:34:23,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200668 states. [2021-06-05 05:34:28,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200668 to 143315. [2021-06-05 05:34:28,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143315 states, 143314 states have (on average 5.5033771997153105) internal successors, (788711), 143314 states have internal predecessors, (788711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:34:30,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143315 states to 143315 states and 788711 transitions. [2021-06-05 05:34:30,442 INFO L78 Accepts]: Start accepts. Automaton has 143315 states and 788711 transitions. Word has length 39 [2021-06-05 05:34:30,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:34:30,442 INFO L482 AbstractCegarLoop]: Abstraction has 143315 states and 788711 transitions. [2021-06-05 05:34:30,442 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:34:30,442 INFO L276 IsEmpty]: Start isEmpty. Operand 143315 states and 788711 transitions. [2021-06-05 05:34:30,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 05:34:30,880 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:34:30,880 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:34:31,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:34:31,085 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:34:31,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:34:31,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1719904642, now seen corresponding path program 15 times [2021-06-05 05:34:31,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:34:31,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996671781] [2021-06-05 05:34:31,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:34:31,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:34:31,124 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 05:34:31,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:34:31,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996671781] [2021-06-05 05:34:31,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996671781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:34:31,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785808617] [2021-06-05 05:34:31,124 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:34:31,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:34:31,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:34:31,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 05:34:31,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:34:31,246 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 05:34:31,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785808617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:34:31,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:34:31,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-06-05 05:34:31,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221922110] [2021-06-05 05:34:31,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 05:34:31,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:34:31,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 05:34:31,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:34:31,247 INFO L87 Difference]: Start difference. First operand 143315 states and 788711 transitions. Second operand has 10 states, 10 states have (on average 6.0) internal successors, (60), 9 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:34:37,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:34:37,066 INFO L93 Difference]: Finished difference Result 400155 states and 2145783 transitions. [2021-06-05 05:34:37,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 05:34:37,067 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.0) internal successors, (60), 9 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 05:34:37,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:34:39,101 INFO L225 Difference]: With dead ends: 400155 [2021-06-05 05:34:39,101 INFO L226 Difference]: Without dead ends: 380814 [2021-06-05 05:34:39,102 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 716 ImplicationChecksByTransitivity, 364.9ms TimeCoverageRelationStatistics Valid=523, Invalid=1733, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 05:34:40,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380814 states. [2021-06-05 05:34:49,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380814 to 289785. [2021-06-05 05:34:50,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289785 states, 289784 states have (on average 5.571549844021754) internal successors, (1614546), 289784 states have internal predecessors, (1614546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:34:53,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289785 states to 289785 states and 1614546 transitions. [2021-06-05 05:34:53,658 INFO L78 Accepts]: Start accepts. Automaton has 289785 states and 1614546 transitions. Word has length 39 [2021-06-05 05:34:53,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:34:53,660 INFO L482 AbstractCegarLoop]: Abstraction has 289785 states and 1614546 transitions. [2021-06-05 05:34:53,660 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 6.0) internal successors, (60), 9 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:34:53,660 INFO L276 IsEmpty]: Start isEmpty. Operand 289785 states and 1614546 transitions. [2021-06-05 05:34:54,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 05:34:54,743 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:34:54,744 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:34:54,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-06-05 05:34:54,944 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:34:54,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:34:54,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1182419534, now seen corresponding path program 16 times [2021-06-05 05:34:54,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:34:54,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094190882] [2021-06-05 05:34:54,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:34:54,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:34:54,974 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 05:34:54,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:34:54,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094190882] [2021-06-05 05:34:54,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094190882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:34:54,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312312660] [2021-06-05 05:34:54,975 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:34:55,029 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:34:55,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:34:55,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 05:34:55,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:34:55,085 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 05:34:55,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312312660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:34:55,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:34:55,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-05 05:34:55,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485140160] [2021-06-05 05:34:55,086 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 05:34:55,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:34:55,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 05:34:55,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 05:34:55,087 INFO L87 Difference]: Start difference. First operand 289785 states and 1614546 transitions. Second operand has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:35:00,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:35:00,317 INFO L93 Difference]: Finished difference Result 383916 states and 2121133 transitions. [2021-06-05 05:35:00,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 05:35:00,317 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 5 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 39 [2021-06-05 05:35:00,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:35:04,511 INFO L225 Difference]: With dead ends: 383916 [2021-06-05 05:35:04,511 INFO L226 Difference]: Without dead ends: 383856 [2021-06-05 05:35:04,512 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 24.7ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-05 05:35:05,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383856 states. [2021-06-05 05:35:18,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383856 to 344309. [2021-06-05 05:35:18,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344309 states, 344308 states have (on average 5.637737142326057) internal successors, (1941118), 344308 states have internal predecessors, (1941118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:35:22,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344309 states to 344309 states and 1941118 transitions. [2021-06-05 05:35:22,706 INFO L78 Accepts]: Start accepts. Automaton has 344309 states and 1941118 transitions. Word has length 39 [2021-06-05 05:35:22,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:35:22,707 INFO L482 AbstractCegarLoop]: Abstraction has 344309 states and 1941118 transitions. [2021-06-05 05:35:22,707 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:35:22,707 INFO L276 IsEmpty]: Start isEmpty. Operand 344309 states and 1941118 transitions. [2021-06-05 05:35:24,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 05:35:24,032 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:35:24,032 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:35:24,237 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-05 05:35:24,237 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:35:24,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:35:24,237 INFO L82 PathProgramCache]: Analyzing trace with hash 417724618, now seen corresponding path program 17 times [2021-06-05 05:35:24,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:35:24,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14103968] [2021-06-05 05:35:24,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:35:24,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:35:24,266 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 05:35:24,266 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:35:24,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14103968] [2021-06-05 05:35:24,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14103968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:35:24,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485420531] [2021-06-05 05:35:24,267 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:35:24,323 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:35:24,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:35:24,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 05:35:24,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:35:24,396 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:35:24,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485420531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:35:24,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:35:24,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-06-05 05:35:24,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414772242] [2021-06-05 05:35:24,399 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 05:35:24,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:35:24,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 05:35:24,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:35:24,399 INFO L87 Difference]: Start difference. First operand 344309 states and 1941118 transitions. Second operand has 10 states, 10 states have (on average 5.9) internal successors, (59), 9 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:35:34,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:35:34,293 INFO L93 Difference]: Finished difference Result 769151 states and 4236547 transitions. [2021-06-05 05:35:34,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 05:35:34,293 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.9) internal successors, (59), 9 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 05:35:34,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:35:41,037 INFO L225 Difference]: With dead ends: 769151 [2021-06-05 05:35:41,037 INFO L226 Difference]: Without dead ends: 757623 [2021-06-05 05:35:41,038 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 307.0ms TimeCoverageRelationStatistics Valid=346, Invalid=1136, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:35:43,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 757623 states. [2021-06-05 05:36:08,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 757623 to 582275. [2021-06-05 05:36:10,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 582275 states, 582274 states have (on average 5.670582921442483) internal successors, (3301833), 582274 states have internal predecessors, (3301833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:36:19,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582275 states to 582275 states and 3301833 transitions. [2021-06-05 05:36:19,473 INFO L78 Accepts]: Start accepts. Automaton has 582275 states and 3301833 transitions. Word has length 39 [2021-06-05 05:36:19,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:36:19,473 INFO L482 AbstractCegarLoop]: Abstraction has 582275 states and 3301833 transitions. [2021-06-05 05:36:19,473 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.9) internal successors, (59), 9 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:36:19,473 INFO L276 IsEmpty]: Start isEmpty. Operand 582275 states and 3301833 transitions. [2021-06-05 05:36:24,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 05:36:24,104 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:36:24,104 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:36:24,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:36:24,305 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:36:24,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:36:24,306 INFO L82 PathProgramCache]: Analyzing trace with hash -349035648, now seen corresponding path program 18 times [2021-06-05 05:36:24,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:36:24,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993538050] [2021-06-05 05:36:24,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:36:24,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:36:24,341 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:36:24,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:36:24,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993538050] [2021-06-05 05:36:24,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993538050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:36:24,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647512896] [2021-06-05 05:36:24,342 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:36:24,393 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 05:36:24,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:36:24,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 05:36:24,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:36:24,455 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 05:36:24,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647512896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:36:24,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:36:24,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 8 [2021-06-05 05:36:24,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773372529] [2021-06-05 05:36:24,457 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 05:36:24,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:36:24,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 05:36:24,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-05 05:36:24,457 INFO L87 Difference]: Start difference. First operand 582275 states and 3301833 transitions. Second operand has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 8 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:36:39,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:36:39,768 INFO L93 Difference]: Finished difference Result 886972 states and 4815236 transitions. [2021-06-05 05:36:39,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:36:39,769 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 8 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 05:36:39,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:36:49,072 INFO L225 Difference]: With dead ends: 886972 [2021-06-05 05:36:49,072 INFO L226 Difference]: Without dead ends: 881017 [2021-06-05 05:36:49,073 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 180.9ms TimeCoverageRelationStatistics Valid=204, Invalid=498, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:36:50,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 881017 states. [2021-06-05 05:37:19,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 881017 to 699612. [2021-06-05 05:37:21,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 699612 states, 699611 states have (on average 5.588697147414778) internal successors, (3909914), 699611 states have internal predecessors, (3909914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:32,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 699612 states to 699612 states and 3909914 transitions. [2021-06-05 05:37:32,162 INFO L78 Accepts]: Start accepts. Automaton has 699612 states and 3909914 transitions. Word has length 39 [2021-06-05 05:37:32,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:37:32,162 INFO L482 AbstractCegarLoop]: Abstraction has 699612 states and 3909914 transitions. [2021-06-05 05:37:32,162 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 8 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:32,162 INFO L276 IsEmpty]: Start isEmpty. Operand 699612 states and 3909914 transitions. [2021-06-05 05:37:37,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 05:37:37,986 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:37:37,986 INFO L521 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, 1, 1, 1, 1, 1, 1] [2021-06-05 05:37:38,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-05 05:37:38,221 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:37:38,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:37:38,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1573340514, now seen corresponding path program 19 times [2021-06-05 05:37:38,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:37:38,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093512575] [2021-06-05 05:37:38,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:37:38,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:37:38,255 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 05:37:38,256 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:37:38,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093512575] [2021-06-05 05:37:38,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093512575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:38,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497000717] [2021-06-05 05:37:38,256 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:37:38,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:37:38,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 05:37:38,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:37:38,413 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 05:37:38,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497000717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:38,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:37:38,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 05:37:38,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138687836] [2021-06-05 05:37:38,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 05:37:38,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:37:38,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 05:37:38,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 05:37:38,415 INFO L87 Difference]: Start difference. First operand 699612 states and 3909914 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)