/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-19 22:41:51,466 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-19 22:41:51,467 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-19 22:41:51,501 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-19 22:41:51,564 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2022-03-19 22:41:51,597 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-19 22:41:51,598 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-19 22:41:51,598 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-19 22:41:51,598 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-19 22:41:51,599 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-19 22:41:51,599 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-19 22:41:51,599 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-19 22:41:51,600 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-19 22:41:51,600 INFO L138 SettingsManager]: * Use SBE=true [2022-03-19 22:41:51,600 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-19 22:41:51,600 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-19 22:41:51,600 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-19 22:41:51,600 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-19 22:41:51,601 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-19 22:41:51,601 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-19 22:41:51,601 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-19 22:41:51,601 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-19 22:41:51,601 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-19 22:41:51,601 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-19 22:41:51,601 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-19 22:41:51,601 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-19 22:41:51,602 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-19 22:41:51,602 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-19 22:41:51,602 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-19 22:41:51,602 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 22:41:51,602 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-19 22:41:51,602 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-19 22:41:51,603 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-19 22:41:51,603 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-19 22:41:51,603 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-19 22:41:51,605 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-19 22:41:51,605 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-03-19 22:41:51,606 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-19 22:41:51,606 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-19 22:41:51,821 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-19 22:41:51,841 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-19 22:41:51,843 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-19 22:41:51,844 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-19 22:41:51,845 INFO L275 PluginConnector]: CDTParser initialized [2022-03-19 22:41:51,847 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+cfa-reducer.c [2022-03-19 22:41:51,903 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3083eba67/49274b907c62470ab781f381e0867413/FLAG9bffe5c22 [2022-03-19 22:41:52,292 INFO L306 CDTParser]: Found 1 translation units. [2022-03-19 22:41:52,292 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+cfa-reducer.c [2022-03-19 22:41:52,299 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3083eba67/49274b907c62470ab781f381e0867413/FLAG9bffe5c22 [2022-03-19 22:41:52,311 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3083eba67/49274b907c62470ab781f381e0867413 [2022-03-19 22:41:52,314 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-19 22:41:52,315 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-19 22:41:52,316 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-19 22:41:52,316 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-19 22:41:52,319 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-19 22:41:52,319 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 10:41:52" (1/1) ... [2022-03-19 22:41:52,320 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4fd86795 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:41:52, skipping insertion in model container [2022-03-19 22:41:52,320 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 10:41:52" (1/1) ... [2022-03-19 22:41:52,326 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-19 22:41:52,349 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-19 22:41:52,560 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+cfa-reducer.c[7920,7933] [2022-03-19 22:41:52,578 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 22:41:52,585 INFO L203 MainTranslator]: Completed pre-run [2022-03-19 22:41:52,662 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+cfa-reducer.c[7920,7933] [2022-03-19 22:41:52,664 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 22:41:52,680 INFO L208 MainTranslator]: Completed translation [2022-03-19 22:41:52,681 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:41:52 WrapperNode [2022-03-19 22:41:52,681 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-19 22:41:52,682 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-19 22:41:52,682 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-19 22:41:52,682 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-19 22:41:52,692 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:41:52" (1/1) ... [2022-03-19 22:41:52,692 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:41:52" (1/1) ... [2022-03-19 22:41:52,721 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:41:52" (1/1) ... [2022-03-19 22:41:52,721 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:41:52" (1/1) ... [2022-03-19 22:41:52,753 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:41:52" (1/1) ... [2022-03-19 22:41:52,755 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:41:52" (1/1) ... [2022-03-19 22:41:52,757 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:41:52" (1/1) ... [2022-03-19 22:41:52,779 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-19 22:41:52,780 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-19 22:41:52,780 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-19 22:41:52,780 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-19 22:41:52,787 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:41:52" (1/1) ... [2022-03-19 22:41:52,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 22:41:52,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:41:52,815 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-19 22:41:52,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-19 22:41:52,842 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-19 22:41:52,843 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-19 22:41:52,843 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-19 22:41:52,843 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-19 22:41:52,843 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-19 22:41:52,843 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-19 22:41:52,843 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-19 22:41:52,843 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-19 22:41:52,844 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_89 [2022-03-19 22:41:52,844 INFO L130 BoogieDeclarations]: Found specification of procedure fopen [2022-03-19 22:41:52,844 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-19 22:41:52,844 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-19 22:41:52,844 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-03-19 22:41:52,844 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-19 22:41:52,844 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-03-19 22:41:52,844 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-19 22:41:52,845 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-19 22:41:52,845 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-19 22:41:52,845 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-19 22:41:52,845 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-19 22:41:52,845 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-03-19 22:41:52,939 INFO L234 CfgBuilder]: Building ICFG [2022-03-19 22:41:52,941 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-19 22:41:53,451 INFO L275 CfgBuilder]: Performing block encoding [2022-03-19 22:41:53,455 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-19 22:41:53,456 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-03-19 22:41:53,457 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 10:41:53 BoogieIcfgContainer [2022-03-19 22:41:53,457 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-19 22:41:53,460 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-19 22:41:53,460 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-19 22:41:53,463 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-19 22:41:53,464 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.03 10:41:52" (1/3) ... [2022-03-19 22:41:53,464 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4496d160 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 10:41:53, skipping insertion in model container [2022-03-19 22:41:53,465 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:41:52" (2/3) ... [2022-03-19 22:41:53,465 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4496d160 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 10:41:53, skipping insertion in model container [2022-03-19 22:41:53,465 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 10:41:53" (3/3) ... [2022-03-19 22:41:53,466 INFO L111 eAbstractionObserver]: Analyzing ICFG aiob_4.c.v+cfa-reducer.c [2022-03-19 22:41:53,471 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-19 22:41:53,471 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-19 22:41:53,519 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-19 22:41:53,525 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-19 22:41:53,525 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-19 22:41:53,544 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 22:41:53,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-19 22:41:53,548 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:41:53,548 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:41:53,549 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:41:53,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:41:53,553 INFO L85 PathProgramCache]: Analyzing trace with hash 2001183330, now seen corresponding path program 1 times [2022-03-19 22:41:53,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:41:53,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323906525] [2022-03-19 22:41:53,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:41:53,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:41:53,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:41:53,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:41:53,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:41:53,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:41:53,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:41:53,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323906525] [2022-03-19 22:41:53,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323906525] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 22:41:53,880 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 22:41:53,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 22:41:53,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153659960] [2022-03-19 22:41:53,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 22:41:53,886 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 22:41:53,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:41:53,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 22:41:53,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-19 22:41:53,909 INFO L87 Difference]: Start difference. First operand has 19 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:41:54,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:41:54,004 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2022-03-19 22:41:54,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-19 22:41:54,008 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-03-19 22:41:54,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:41:54,014 INFO L225 Difference]: With dead ends: 46 [2022-03-19 22:41:54,014 INFO L226 Difference]: Without dead ends: 24 [2022-03-19 22:41:54,017 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-03-19 22:41:54,024 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 33 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 22:41:54,025 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 41 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 22:41:54,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-03-19 22:41:54,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 18. [2022-03-19 22:41:54,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:41:54,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2022-03-19 22:41:54,054 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2022-03-19 22:41:54,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:41:54,055 INFO L478 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2022-03-19 22:41:54,056 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:41:54,057 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2022-03-19 22:41:54,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-19 22:41:54,058 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:41:54,058 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:41:54,058 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-19 22:41:54,059 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:41:54,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:41:54,064 INFO L85 PathProgramCache]: Analyzing trace with hash 2000766256, now seen corresponding path program 1 times [2022-03-19 22:41:54,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:41:54,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155006499] [2022-03-19 22:41:54,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:41:54,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:41:54,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:41:54,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:41:54,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:41:54,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:41:54,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:41:54,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155006499] [2022-03-19 22:41:54,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155006499] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 22:41:54,223 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 22:41:54,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 22:41:54,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421553652] [2022-03-19 22:41:54,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 22:41:54,224 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 22:41:54,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:41:54,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 22:41:54,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-19 22:41:54,226 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:41:54,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:41:54,297 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2022-03-19 22:41:54,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-19 22:41:54,299 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-03-19 22:41:54,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:41:54,299 INFO L225 Difference]: With dead ends: 28 [2022-03-19 22:41:54,300 INFO L226 Difference]: Without dead ends: 26 [2022-03-19 22:41:54,302 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-19 22:41:54,303 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 11 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 22:41:54,303 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 41 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 22:41:54,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-03-19 22:41:54,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 20. [2022-03-19 22:41:54,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:41:54,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2022-03-19 22:41:54,310 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 13 [2022-03-19 22:41:54,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:41:54,313 INFO L478 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2022-03-19 22:41:54,316 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:41:54,317 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2022-03-19 22:41:54,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-19 22:41:54,317 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:41:54,317 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:41:54,317 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-19 22:41:54,318 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:41:54,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:41:54,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1978265494, now seen corresponding path program 1 times [2022-03-19 22:41:54,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:41:54,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628479756] [2022-03-19 22:41:54,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:41:54,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:41:54,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:41:54,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:41:54,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:41:54,519 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:41:54,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:41:54,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628479756] [2022-03-19 22:41:54,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628479756] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:41:54,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052704770] [2022-03-19 22:41:54,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:41:54,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:41:54,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:41:54,522 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 22:41:54,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-19 22:41:54,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:41:54,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 579 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 22:41:54,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:41:54,845 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:41:54,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:41:54,940 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:41:54,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052704770] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:41:54,941 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:41:54,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-03-19 22:41:54,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830015165] [2022-03-19 22:41:54,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:41:54,945 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 22:41:54,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:41:54,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 22:41:54,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-03-19 22:41:54,948 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:41:55,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:41:55,169 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2022-03-19 22:41:55,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 22:41:55,169 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-03-19 22:41:55,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:41:55,170 INFO L225 Difference]: With dead ends: 53 [2022-03-19 22:41:55,170 INFO L226 Difference]: Without dead ends: 43 [2022-03-19 22:41:55,171 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-03-19 22:41:55,171 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 45 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 22:41:55,172 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 56 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 22:41:55,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-03-19 22:41:55,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2022-03-19 22:41:55,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 34 states have internal predecessors, (36), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:41:55,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2022-03-19 22:41:55,179 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 19 [2022-03-19 22:41:55,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:41:55,179 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2022-03-19 22:41:55,179 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:41:55,180 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2022-03-19 22:41:55,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-19 22:41:55,180 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:41:55,180 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:41:55,208 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-19 22:41:55,404 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:41:55,405 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:41:55,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:41:55,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1281324674, now seen corresponding path program 2 times [2022-03-19 22:41:55,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:41:55,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062068039] [2022-03-19 22:41:55,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:41:55,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:41:55,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:41:55,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:41:55,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:41:55,617 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:41:55,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:41:55,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062068039] [2022-03-19 22:41:55,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062068039] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:41:55,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11302778] [2022-03-19 22:41:55,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 22:41:55,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:41:55,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:41:55,620 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 22:41:55,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-19 22:41:55,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 22:41:55,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 22:41:55,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 645 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-19 22:41:55,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:41:55,994 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:41:55,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:41:56,162 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:41:56,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11302778] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:41:56,162 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:41:56,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 16 [2022-03-19 22:41:56,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219324682] [2022-03-19 22:41:56,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:41:56,163 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-19 22:41:56,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:41:56,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-19 22:41:56,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2022-03-19 22:41:56,166 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand has 16 states, 16 states have (on average 4.125) internal successors, (66), 15 states have internal predecessors, (66), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:41:56,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:41:56,829 INFO L93 Difference]: Finished difference Result 89 states and 97 transitions. [2022-03-19 22:41:56,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-19 22:41:56,829 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.125) internal successors, (66), 15 states have internal predecessors, (66), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-03-19 22:41:56,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:41:56,831 INFO L225 Difference]: With dead ends: 89 [2022-03-19 22:41:56,831 INFO L226 Difference]: Without dead ends: 79 [2022-03-19 22:41:56,831 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=228, Invalid=642, Unknown=0, NotChecked=0, Total=870 [2022-03-19 22:41:56,832 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 101 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 22:41:56,832 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 139 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 22:41:56,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-03-19 22:41:56,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 74. [2022-03-19 22:41:56,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 70 states have (on average 1.0285714285714285) internal successors, (72), 70 states have internal predecessors, (72), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:41:56,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2022-03-19 22:41:56,843 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 37 [2022-03-19 22:41:56,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:41:56,843 INFO L478 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2022-03-19 22:41:56,843 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.125) internal successors, (66), 15 states have internal predecessors, (66), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:41:56,844 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2022-03-19 22:41:56,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-03-19 22:41:56,845 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:41:56,845 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:41:56,873 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-19 22:41:57,070 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-03-19 22:41:57,070 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:41:57,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:41:57,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1629405362, now seen corresponding path program 3 times [2022-03-19 22:41:57,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:41:57,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223491070] [2022-03-19 22:41:57,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:41:57,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:41:57,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:41:57,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:41:57,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:41:57,384 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 20 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:41:57,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:41:57,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223491070] [2022-03-19 22:41:57,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223491070] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:41:57,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406985309] [2022-03-19 22:41:57,385 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-19 22:41:57,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:41:57,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:41:57,387 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 22:41:57,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-19 22:41:57,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-19 22:41:57,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 22:41:57,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 601 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-19 22:41:57,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:41:57,878 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-19 22:41:57,879 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23