/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/array-crafted/mapsum2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-30 23:12:20,090 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-30 23:12:20,092 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-30 23:12:20,152 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-30 23:12:20,181 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 [2022-01-30 23:12:20,196 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-30 23:12:20,196 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-30 23:12:20,197 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-30 23:12:20,197 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-30 23:12:20,197 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-30 23:12:20,197 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-30 23:12:20,198 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-30 23:12:20,198 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-30 23:12:20,198 INFO L138 SettingsManager]: * Use SBE=true [2022-01-30 23:12:20,198 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-30 23:12:20,199 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-30 23:12:20,199 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-30 23:12:20,199 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-30 23:12:20,199 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-30 23:12:20,199 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-30 23:12:20,199 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-30 23:12:20,199 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-30 23:12:20,199 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-30 23:12:20,200 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-30 23:12:20,200 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-30 23:12:20,200 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-30 23:12:20,200 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-30 23:12:20,200 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-30 23:12:20,200 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-30 23:12:20,200 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-30 23:12:20,201 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-30 23:12:20,201 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-30 23:12:20,201 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-30 23:12:20,201 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-30 23:12:20,201 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-30 23:12:20,201 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-30 23:12:20,201 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-30 23:12:20,202 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-30 23:12:20,202 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-30 23:12:20,370 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-30 23:12:20,395 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-30 23:12:20,397 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-30 23:12:20,398 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-30 23:12:20,401 INFO L275 PluginConnector]: CDTParser initialized [2022-01-30 23:12:20,402 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/mapsum2.i [2022-01-30 23:12:20,466 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/03bceef1c/537e4e91658c4e6ea4c05a68fc4ed909/FLAGc1866159a [2022-01-30 23:12:20,780 INFO L306 CDTParser]: Found 1 translation units. [2022-01-30 23:12:20,780 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/mapsum2.i [2022-01-30 23:12:20,785 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/03bceef1c/537e4e91658c4e6ea4c05a68fc4ed909/FLAGc1866159a [2022-01-30 23:12:21,209 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/03bceef1c/537e4e91658c4e6ea4c05a68fc4ed909 [2022-01-30 23:12:21,211 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-30 23:12:21,212 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-30 23:12:21,214 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-30 23:12:21,214 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-30 23:12:21,216 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-30 23:12:21,217 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.01 11:12:21" (1/1) ... [2022-01-30 23:12:21,218 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1521d105 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 11:12:21, skipping insertion in model container [2022-01-30 23:12:21,218 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.01 11:12:21" (1/1) ... [2022-01-30 23:12:21,223 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-30 23:12:21,234 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-30 23:12:21,401 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/mapsum2.i[1306,1319] [2022-01-30 23:12:21,404 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-30 23:12:21,410 INFO L203 MainTranslator]: Completed pre-run [2022-01-30 23:12:21,440 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/mapsum2.i[1306,1319] [2022-01-30 23:12:21,446 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-30 23:12:21,456 INFO L208 MainTranslator]: Completed translation [2022-01-30 23:12:21,456 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 11:12:21 WrapperNode [2022-01-30 23:12:21,457 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-30 23:12:21,462 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-30 23:12:21,462 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-30 23:12:21,463 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-30 23:12:21,471 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 11:12:21" (1/1) ... [2022-01-30 23:12:21,472 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 11:12:21" (1/1) ... [2022-01-30 23:12:21,487 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 11:12:21" (1/1) ... [2022-01-30 23:12:21,487 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 11:12:21" (1/1) ... [2022-01-30 23:12:21,497 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 11:12:21" (1/1) ... [2022-01-30 23:12:21,500 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 11:12:21" (1/1) ... [2022-01-30 23:12:21,501 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 11:12:21" (1/1) ... [2022-01-30 23:12:21,503 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-30 23:12:21,503 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-30 23:12:21,504 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-30 23:12:21,504 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-30 23:12:21,510 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 11:12:21" (1/1) ... [2022-01-30 23:12:21,516 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-30 23:12:21,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 23:12:21,540 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) [2022-01-30 23:12:21,565 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 [2022-01-30 23:12:21,579 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-30 23:12:21,579 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-30 23:12:21,579 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-30 23:12:21,579 INFO L138 BoogieDeclarations]: Found implementation of procedure mapsum [2022-01-30 23:12:21,579 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-30 23:12:21,579 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-30 23:12:21,579 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-30 23:12:21,579 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-30 23:12:21,580 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-30 23:12:21,580 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-30 23:12:21,580 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-30 23:12:21,580 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-30 23:12:21,580 INFO L130 BoogieDeclarations]: Found specification of procedure mapsum [2022-01-30 23:12:21,580 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-30 23:12:21,580 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-30 23:12:21,580 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-30 23:12:21,580 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-30 23:12:21,580 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-30 23:12:21,581 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-30 23:12:21,581 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-30 23:12:21,581 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-30 23:12:21,638 INFO L234 CfgBuilder]: Building ICFG [2022-01-30 23:12:21,639 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-30 23:12:21,742 INFO L275 CfgBuilder]: Performing block encoding [2022-01-30 23:12:21,755 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-30 23:12:21,756 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-30 23:12:21,757 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.01 11:12:21 BoogieIcfgContainer [2022-01-30 23:12:21,757 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-30 23:12:21,759 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-30 23:12:21,759 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-30 23:12:21,774 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-30 23:12:21,774 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.01 11:12:21" (1/3) ... [2022-01-30 23:12:21,775 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1644dd26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.01 11:12:21, skipping insertion in model container [2022-01-30 23:12:21,775 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 11:12:21" (2/3) ... [2022-01-30 23:12:21,775 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1644dd26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.01 11:12:21, skipping insertion in model container [2022-01-30 23:12:21,775 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.01 11:12:21" (3/3) ... [2022-01-30 23:12:21,776 INFO L111 eAbstractionObserver]: Analyzing ICFG mapsum2.i [2022-01-30 23:12:21,780 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-30 23:12:21,780 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-30 23:12:21,835 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-30 23:12:21,842 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2022-01-30 23:12:21,842 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-30 23:12:21,855 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 21 states have (on average 1.380952380952381) internal successors, (29), 22 states have internal predecessors, (29), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-30 23:12:21,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-30 23:12:21,859 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 23:12:21,859 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 23:12:21,860 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 23:12:21,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 23:12:21,863 INFO L85 PathProgramCache]: Analyzing trace with hash -1514933818, now seen corresponding path program 1 times [2022-01-30 23:12:21,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 23:12:21,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190234300] [2022-01-30 23:12:21,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 23:12:21,875 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 23:12:21,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:12:22,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 23:12:22,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:12:22,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-30 23:12:22,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:12:22,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-01-30 23:12:22,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:12:22,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-01-30 23:12:22,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:12:22,061 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-30 23:12:22,061 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 23:12:22,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190234300] [2022-01-30 23:12:22,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190234300] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-30 23:12:22,062 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-30 23:12:22,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-30 23:12:22,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602576588] [2022-01-30 23:12:22,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-30 23:12:22,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-30 23:12:22,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 23:12:22,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-30 23:12:22,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-30 23:12:22,091 INFO L87 Difference]: Start difference. First operand has 31 states, 21 states have (on average 1.380952380952381) internal successors, (29), 22 states have internal predecessors, (29), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-30 23:12:22,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 23:12:22,132 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2022-01-30 23:12:22,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-30 23:12:22,135 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2022-01-30 23:12:22,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 23:12:22,140 INFO L225 Difference]: With dead ends: 54 [2022-01-30 23:12:22,140 INFO L226 Difference]: Without dead ends: 26 [2022-01-30 23:12:22,143 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-30 23:12:22,145 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 22 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-30 23:12:22,146 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 35 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-30 23:12:22,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-01-30 23:12:22,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-01-30 23:12:22,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-30 23:12:22,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2022-01-30 23:12:22,185 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 32 [2022-01-30 23:12:22,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 23:12:22,185 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2022-01-30 23:12:22,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-30 23:12:22,185 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2022-01-30 23:12:22,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-30 23:12:22,187 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 23:12:22,187 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 23:12:22,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-30 23:12:22,187 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 23:12:22,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 23:12:22,188 INFO L85 PathProgramCache]: Analyzing trace with hash -649748416, now seen corresponding path program 1 times [2022-01-30 23:12:22,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 23:12:22,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980087803] [2022-01-30 23:12:22,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 23:12:22,189 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 23:12:22,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:12:22,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 23:12:22,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:12:22,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-30 23:12:22,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:12:22,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-01-30 23:12:22,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:12:22,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-01-30 23:12:22,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:12:22,286 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-30 23:12:22,286 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 23:12:22,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980087803] [2022-01-30 23:12:22,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980087803] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 23:12:22,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363406877] [2022-01-30 23:12:22,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 23:12:22,287 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 23:12:22,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 23:12:22,299 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) [2022-01-30 23:12:22,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-30 23:12:22,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:12:22,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-30 23:12:22,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 23:12:22,452 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-30 23:12:22,452 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-30 23:12:22,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363406877] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-30 23:12:22,453 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-30 23:12:22,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-01-30 23:12:22,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549805627] [2022-01-30 23:12:22,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-30 23:12:22,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-30 23:12:22,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 23:12:22,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-30 23:12:22,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-30 23:12:22,456 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-30 23:12:22,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 23:12:22,465 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2022-01-30 23:12:22,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-30 23:12:22,466 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2022-01-30 23:12:22,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 23:12:22,467 INFO L225 Difference]: With dead ends: 46 [2022-01-30 23:12:22,467 INFO L226 Difference]: Without dead ends: 28 [2022-01-30 23:12:22,467 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-30 23:12:22,468 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 1 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-30 23:12:22,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 54 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-30 23:12:22,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-01-30 23:12:22,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2022-01-30 23:12:22,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-30 23:12:22,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-01-30 23:12:22,475 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 32 [2022-01-30 23:12:22,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 23:12:22,475 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-01-30 23:12:22,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-30 23:12:22,475 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-01-30 23:12:22,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-30 23:12:22,476 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 23:12:22,476 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 23:12:22,500 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-30 23:12:22,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 23:12:22,700 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 23:12:22,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 23:12:22,701 INFO L85 PathProgramCache]: Analyzing trace with hash 506973090, now seen corresponding path program 1 times [2022-01-30 23:12:22,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 23:12:22,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501528614] [2022-01-30 23:12:22,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 23:12:22,701 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 23:12:22,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:12:22,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 23:12:22,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:12:22,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-30 23:12:22,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:12:22,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-01-30 23:12:22,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:12:22,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-01-30 23:12:22,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:12:22,828 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-30 23:12:22,828 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 23:12:22,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501528614] [2022-01-30 23:12:22,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501528614] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 23:12:22,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946868593] [2022-01-30 23:12:22,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 23:12:22,831 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 23:12:22,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 23:12:22,833 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) [2022-01-30 23:12:22,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-30 23:12:22,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:12:22,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-30 23:12:22,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 23:12:22,978 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-30 23:12:22,978 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-30 23:12:22,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946868593] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-30 23:12:22,980 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-30 23:12:22,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2022-01-30 23:12:22,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161788286] [2022-01-30 23:12:22,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-30 23:12:22,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-30 23:12:22,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 23:12:22,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-30 23:12:22,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-30 23:12:22,984 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-30 23:12:22,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 23:12:22,995 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2022-01-30 23:12:22,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-30 23:12:22,997 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 34 [2022-01-30 23:12:22,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 23:12:22,999 INFO L225 Difference]: With dead ends: 46 [2022-01-30 23:12:22,999 INFO L226 Difference]: Without dead ends: 29 [2022-01-30 23:12:23,000 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-30 23:12:23,003 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 1 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-30 23:12:23,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 54 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-30 23:12:23,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-01-30 23:12:23,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2022-01-30 23:12:23,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-30 23:12:23,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2022-01-30 23:12:23,008 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 34 [2022-01-30 23:12:23,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 23:12:23,008 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2022-01-30 23:12:23,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-30 23:12:23,009 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2022-01-30 23:12:23,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-30 23:12:23,010 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 23:12:23,010 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 23:12:23,032 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-30 23:12:23,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-01-30 23:12:23,211 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 23:12:23,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 23:12:23,211 INFO L85 PathProgramCache]: Analyzing trace with hash -1359785280, now seen corresponding path program 1 times [2022-01-30 23:12:23,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 23:12:23,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11437361] [2022-01-30 23:12:23,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 23:12:23,212 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 23:12:23,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:12:23,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 23:12:23,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:12:23,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-30 23:12:23,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:12:23,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-30 23:12:23,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:12:23,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-01-30 23:12:23,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:12:23,276 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-01-30 23:12:23,276 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 23:12:23,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11437361] [2022-01-30 23:12:23,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11437361] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 23:12:23,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763820767] [2022-01-30 23:12:23,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 23:12:23,277 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 23:12:23,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 23:12:23,278 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) [2022-01-30 23:12:23,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-30 23:12:23,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:12:23,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-30 23:12:23,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 23:12:23,423 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-30 23:12:23,424 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-30 23:12:23,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763820767] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-30 23:12:23,424 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-30 23:12:23,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-01-30 23:12:23,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337928379] [2022-01-30 23:12:23,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-30 23:12:23,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-30 23:12:23,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 23:12:23,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-30 23:12:23,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-30 23:12:23,426 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-30 23:12:23,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 23:12:23,435 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2022-01-30 23:12:23,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-30 23:12:23,436 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 40 [2022-01-30 23:12:23,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 23:12:23,436 INFO L225 Difference]: With dead ends: 43 [2022-01-30 23:12:23,437 INFO L226 Difference]: Without dead ends: 30 [2022-01-30 23:12:23,437 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-30 23:12:23,438 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 1 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-30 23:12:23,438 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 54 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-30 23:12:23,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-01-30 23:12:23,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2022-01-30 23:12:23,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-30 23:12:23,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2022-01-30 23:12:23,444 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 40 [2022-01-30 23:12:23,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 23:12:23,445 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2022-01-30 23:12:23,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-30 23:12:23,445 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2022-01-30 23:12:23,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-30 23:12:23,446 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 23:12:23,446 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 23:12:23,476 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-01-30 23:12:23,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 23:12:23,672 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 23:12:23,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 23:12:23,673 INFO L85 PathProgramCache]: Analyzing trace with hash -1659776706, now seen corresponding path program 1 times [2022-01-30 23:12:23,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 23:12:23,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297180372] [2022-01-30 23:12:23,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 23:12:23,673 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 23:12:23,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:12:23,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 23:12:23,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:12:23,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-30 23:12:23,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:12:23,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-30 23:12:23,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:12:23,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-01-30 23:12:23,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:12:23,732 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-01-30 23:12:23,733 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 23:12:23,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297180372] [2022-01-30 23:12:23,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297180372] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 23:12:23,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731156519] [2022-01-30 23:12:23,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 23:12:23,733 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 23:12:23,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 23:12:23,735 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 23:12:23,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-30 23:12:23,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:12:23,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-30 23:12:23,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 23:12:23,956 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-01-30 23:12:23,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 23:12:24,061 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-01-30 23:12:24,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731156519] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 23:12:24,061 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 23:12:24,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-01-30 23:12:24,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989953673] [2022-01-30 23:12:24,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 23:12:24,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-30 23:12:24,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 23:12:24,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-30 23:12:24,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-30 23:12:24,066 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-30 23:12:24,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 23:12:24,178 INFO L93 Difference]: Finished difference Result 55 states and 65 transitions. [2022-01-30 23:12:24,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-30 23:12:24,179 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 42 [2022-01-30 23:12:24,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 23:12:24,183 INFO L225 Difference]: With dead ends: 55 [2022-01-30 23:12:24,183 INFO L226 Difference]: Without dead ends: 35 [2022-01-30 23:12:24,184 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2022-01-30 23:12:24,186 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 26 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-30 23:12:24,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 42 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-30 23:12:24,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-01-30 23:12:24,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-01-30 23:12:24,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 27 states have internal predecessors, (30), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-30 23:12:24,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2022-01-30 23:12:24,199 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 42 [2022-01-30 23:12:24,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 23:12:24,199 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2022-01-30 23:12:24,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-30 23:12:24,199 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2022-01-30 23:12:24,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-01-30 23:12:24,200 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 23:12:24,201 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 23:12:24,218 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-30 23:12:24,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 23:12:24,407 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 23:12:24,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 23:12:24,408 INFO L85 PathProgramCache]: Analyzing trace with hash -174953884, now seen corresponding path program 2 times [2022-01-30 23:12:24,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 23:12:24,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830525167] [2022-01-30 23:12:24,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 23:12:24,408 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 23:12:24,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:12:24,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 23:12:24,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:12:24,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-30 23:12:24,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:12:24,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-01-30 23:12:24,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:12:24,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-01-30 23:12:24,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:12:24,528 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-01-30 23:12:24,528 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 23:12:24,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830525167] [2022-01-30 23:12:24,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830525167] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 23:12:24,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515885342] [2022-01-30 23:12:24,529 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-30 23:12:24,529 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 23:12:24,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 23:12:24,536 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 23:12:24,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-30 23:12:24,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-30 23:12:24,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 23:12:24,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-30 23:12:24,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 23:12:24,700 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-01-30 23:12:24,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 23:12:24,812 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-01-30 23:12:24,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515885342] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 23:12:24,813 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 23:12:24,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2022-01-30 23:12:24,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157072014] [2022-01-30 23:12:24,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 23:12:24,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-30 23:12:24,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 23:12:24,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-30 23:12:24,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2022-01-30 23:12:24,815 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 2 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-30 23:12:25,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 23:12:25,019 INFO L93 Difference]: Finished difference Result 70 states and 87 transitions. [2022-01-30 23:12:25,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-30 23:12:25,020 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 2 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 48 [2022-01-30 23:12:25,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 23:12:25,021 INFO L225 Difference]: With dead ends: 70 [2022-01-30 23:12:25,021 INFO L226 Difference]: Without dead ends: 50 [2022-01-30 23:12:25,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=213, Invalid=489, Unknown=0, NotChecked=0, Total=702 [2022-01-30 23:12:25,022 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 42 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-30 23:12:25,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 40 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-30 23:12:25,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-01-30 23:12:25,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2022-01-30 23:12:25,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 41 states have internal predecessors, (44), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-30 23:12:25,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2022-01-30 23:12:25,028 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 48 [2022-01-30 23:12:25,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 23:12:25,028 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2022-01-30 23:12:25,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 2 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-30 23:12:25,029 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2022-01-30 23:12:25,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-30 23:12:25,030 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 23:12:25,030 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 23:12:25,052 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-01-30 23:12:25,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 23:12:25,243 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 23:12:25,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 23:12:25,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1165450546, now seen corresponding path program 3 times [2022-01-30 23:12:25,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 23:12:25,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952660287] [2022-01-30 23:12:25,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 23:12:25,245 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 23:12:25,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:12:25,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 23:12:25,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:12:25,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-30 23:12:25,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:12:25,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-01-30 23:12:25,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:12:25,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-01-30 23:12:25,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:12:25,350 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2022-01-30 23:12:25,350 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 23:12:25,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952660287] [2022-01-30 23:12:25,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952660287] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 23:12:25,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184140664] [2022-01-30 23:12:25,350 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-30 23:12:25,350 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 23:12:25,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 23:12:25,351 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 23:12:25,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-30 23:12:25,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-30 23:12:25,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 23:12:25,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-30 23:12:25,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 23:12:25,520 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 34 proven. 1 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2022-01-30 23:12:25,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 23:12:25,597 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2022-01-30 23:12:25,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184140664] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 23:12:25,597 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 23:12:25,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-01-30 23:12:25,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31005510] [2022-01-30 23:12:25,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 23:12:25,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-30 23:12:25,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 23:12:25,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-30 23:12:25,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-30 23:12:25,600 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-30 23:12:25,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 23:12:25,702 INFO L93 Difference]: Finished difference Result 70 states and 77 transitions. [2022-01-30 23:12:25,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-30 23:12:25,702 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 66 [2022-01-30 23:12:25,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 23:12:25,704 INFO L225 Difference]: With dead ends: 70 [2022-01-30 23:12:25,704 INFO L226 Difference]: Without dead ends: 55 [2022-01-30 23:12:25,704 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2022-01-30 23:12:25,705 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 26 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-30 23:12:25,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 47 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-30 23:12:25,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-01-30 23:12:25,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-01-30 23:12:25,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 47 states have (on average 1.0638297872340425) internal successors, (50), 47 states have internal predecessors, (50), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-30 23:12:25,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2022-01-30 23:12:25,719 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 66 [2022-01-30 23:12:25,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 23:12:25,721 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2022-01-30 23:12:25,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-30 23:12:25,721 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2022-01-30 23:12:25,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-30 23:12:25,722 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 23:12:25,722 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 23:12:25,748 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-30 23:12:25,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 23:12:25,944 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 23:12:25,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 23:12:25,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1875202744, now seen corresponding path program 4 times [2022-01-30 23:12:25,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 23:12:25,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909655224] [2022-01-30 23:12:25,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 23:12:25,945 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 23:12:25,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:12:26,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 23:12:26,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:12:26,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-30 23:12:26,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:12:26,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-01-30 23:12:26,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:12:26,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-01-30 23:12:26,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:12:26,091 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-01-30 23:12:26,091 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 23:12:26,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909655224] [2022-01-30 23:12:26,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909655224] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 23:12:26,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637627312] [2022-01-30 23:12:26,092 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-30 23:12:26,092 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 23:12:26,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 23:12:26,093 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 23:12:26,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-30 23:12:26,206 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-30 23:12:26,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 23:12:26,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-30 23:12:26,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 23:12:26,313 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 32 proven. 4 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2022-01-30 23:12:26,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 23:12:26,420 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 32 proven. 4 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2022-01-30 23:12:26,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637627312] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 23:12:26,420 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 23:12:26,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5] total 20 [2022-01-30 23:12:26,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616058907] [2022-01-30 23:12:26,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 23:12:26,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-30 23:12:26,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 23:12:26,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-30 23:12:26,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2022-01-30 23:12:26,422 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-30 23:12:26,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 23:12:26,689 INFO L93 Difference]: Finished difference Result 94 states and 109 transitions. [2022-01-30 23:12:26,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-30 23:12:26,689 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 72 [2022-01-30 23:12:26,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 23:12:26,692 INFO L225 Difference]: With dead ends: 94 [2022-01-30 23:12:26,692 INFO L226 Difference]: Without dead ends: 66 [2022-01-30 23:12:26,696 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=315, Invalid=1017, Unknown=0, NotChecked=0, Total=1332 [2022-01-30 23:12:26,696 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 55 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-30 23:12:26,696 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 45 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-30 23:12:26,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-01-30 23:12:26,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2022-01-30 23:12:26,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 57 states have (on average 1.0526315789473684) internal successors, (60), 57 states have internal predecessors, (60), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-30 23:12:26,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2022-01-30 23:12:26,716 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 72 [2022-01-30 23:12:26,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 23:12:26,716 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2022-01-30 23:12:26,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-30 23:12:26,717 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2022-01-30 23:12:26,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-01-30 23:12:26,718 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 23:12:26,719 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 11, 11, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 23:12:26,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-30 23:12:26,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 23:12:26,936 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 23:12:26,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 23:12:26,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1395321890, now seen corresponding path program 5 times [2022-01-30 23:12:26,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 23:12:26,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599602987] [2022-01-30 23:12:26,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 23:12:26,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 23:12:26,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:12:27,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 23:12:27,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:12:27,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-01-30 23:12:27,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:12:27,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-01-30 23:12:27,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:12:27,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-01-30 23:12:27,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:12:27,111 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2022-01-30 23:12:27,111 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 23:12:27,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599602987] [2022-01-30 23:12:27,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599602987] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 23:12:27,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304008445] [2022-01-30 23:12:27,112 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-30 23:12:27,112 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 23:12:27,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 23:12:27,113 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 23:12:27,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-30 23:12:27,451 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2022-01-30 23:12:27,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 23:12:27,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-30 23:12:27,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 23:12:27,653 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 172 proven. 36 refuted. 0 times theorem prover too weak. 304 trivial. 0 not checked. [2022-01-30 23:12:27,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 23:12:27,901 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 212 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2022-01-30 23:12:27,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304008445] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 23:12:27,902 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 23:12:27,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 29 [2022-01-30 23:12:27,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589913122] [2022-01-30 23:12:27,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 23:12:27,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-30 23:12:27,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 23:12:27,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-30 23:12:27,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2022-01-30 23:12:27,904 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand has 29 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 28 states have internal predecessors, (80), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-30 23:12:28,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 23:12:28,368 INFO L93 Difference]: Finished difference Result 120 states and 139 transitions. [2022-01-30 23:12:28,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-30 23:12:28,369 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 28 states have internal predecessors, (80), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 98 [2022-01-30 23:12:28,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 23:12:28,370 INFO L225 Difference]: With dead ends: 120 [2022-01-30 23:12:28,370 INFO L226 Difference]: Without dead ends: 84 [2022-01-30 23:12:28,371 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=630, Invalid=2340, Unknown=0, NotChecked=0, Total=2970 [2022-01-30 23:12:28,373 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 70 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-30 23:12:28,373 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 55 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-30 23:12:28,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-01-30 23:12:28,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2022-01-30 23:12:28,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 75 states have (on average 1.04) internal successors, (78), 75 states have internal predecessors, (78), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-30 23:12:28,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 87 transitions. [2022-01-30 23:12:28,395 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 87 transitions. Word has length 98 [2022-01-30 23:12:28,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 23:12:28,395 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 87 transitions. [2022-01-30 23:12:28,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 28 states have internal predecessors, (80), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-30 23:12:28,396 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 87 transitions. [2022-01-30 23:12:28,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-01-30 23:12:28,398 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 23:12:28,398 INFO L514 BasicCegarLoop]: trace histogram [42, 42, 12, 12, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 23:12:28,428 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-30 23:12:28,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-01-30 23:12:28,624 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 23:12:28,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 23:12:28,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1900162548, now seen corresponding path program 6 times [2022-01-30 23:12:28,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 23:12:28,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772806897] [2022-01-30 23:12:28,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 23:12:28,625 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 23:12:28,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:12:28,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 23:12:28,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:12:28,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-01-30 23:12:28,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:12:28,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-01-30 23:12:28,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:12:28,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-01-30 23:12:28,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:12:28,815 INFO L134 CoverageAnalysis]: Checked inductivity of 2023 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 1879 trivial. 0 not checked. [2022-01-30 23:12:28,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 23:12:28,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772806897] [2022-01-30 23:12:28,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772806897] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 23:12:28,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57188806] [2022-01-30 23:12:28,816 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-30 23:12:28,816 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 23:12:28,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 23:12:28,817 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 23:12:28,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-30 23:12:28,988 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-01-30 23:12:28,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 23:12:28,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-30 23:12:28,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 23:12:29,235 INFO L134 CoverageAnalysis]: Checked inductivity of 2023 backedges. 850 proven. 16 refuted. 0 times theorem prover too weak. 1157 trivial. 0 not checked. [2022-01-30 23:12:29,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 23:12:29,458 INFO L134 CoverageAnalysis]: Checked inductivity of 2023 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2007 trivial. 0 not checked. [2022-01-30 23:12:29,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57188806] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 23:12:29,459 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 23:12:29,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 7, 7] total 26 [2022-01-30 23:12:29,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441678550] [2022-01-30 23:12:29,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 23:12:29,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-30 23:12:29,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 23:12:29,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-30 23:12:29,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=478, Unknown=0, NotChecked=0, Total=650 [2022-01-30 23:12:29,461 INFO L87 Difference]: Start difference. First operand 83 states and 87 transitions. Second operand has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 25 states have internal predecessors, (75), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-30 23:12:29,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 23:12:29,837 INFO L93 Difference]: Finished difference Result 150 states and 164 transitions. [2022-01-30 23:12:29,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-30 23:12:29,837 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 25 states have internal predecessors, (75), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 148 [2022-01-30 23:12:29,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 23:12:29,838 INFO L225 Difference]: With dead ends: 150 [2022-01-30 23:12:29,838 INFO L226 Difference]: Without dead ends: 98 [2022-01-30 23:12:29,840 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 294 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=510, Invalid=1842, Unknown=0, NotChecked=0, Total=2352 [2022-01-30 23:12:29,840 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 64 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-30 23:12:29,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 60 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-30 23:12:29,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-01-30 23:12:29,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2022-01-30 23:12:29,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 89 states have (on average 1.0337078651685394) internal successors, (92), 89 states have internal predecessors, (92), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-30 23:12:29,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 101 transitions. [2022-01-30 23:12:29,846 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 101 transitions. Word has length 148 [2022-01-30 23:12:29,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 23:12:29,846 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 101 transitions. [2022-01-30 23:12:29,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 25 states have internal predecessors, (75), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-30 23:12:29,847 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 101 transitions. [2022-01-30 23:12:29,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-01-30 23:12:29,848 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 23:12:29,848 INFO L514 BasicCegarLoop]: trace histogram [42, 42, 13, 13, 10, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 23:12:29,874 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-30 23:12:30,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-01-30 23:12:30,064 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 23:12:30,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 23:12:30,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1619870154, now seen corresponding path program 7 times [2022-01-30 23:12:30,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 23:12:30,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811520485] [2022-01-30 23:12:30,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 23:12:30,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 23:12:30,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:12:30,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 23:12:30,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:12:30,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-30 23:12:30,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:12:30,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-01-30 23:12:30,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:12:30,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2022-01-30 23:12:30,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:12:30,273 INFO L134 CoverageAnalysis]: Checked inductivity of 2132 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 1963 trivial. 0 not checked. [2022-01-30 23:12:30,273 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 23:12:30,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811520485] [2022-01-30 23:12:30,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811520485] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 23:12:30,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552186666] [2022-01-30 23:12:30,274 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-30 23:12:30,274 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 23:12:30,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 23:12:30,275 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 23:12:30,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-30 23:12:30,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:12:30,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 542 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-30 23:12:30,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 23:12:30,611 INFO L134 CoverageAnalysis]: Checked inductivity of 2132 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 1963 trivial. 0 not checked. [2022-01-30 23:12:30,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 23:12:31,003 INFO L134 CoverageAnalysis]: Checked inductivity of 2132 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 1963 trivial. 0 not checked. [2022-01-30 23:12:31,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552186666] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 23:12:31,004 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 23:12:31,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 32 [2022-01-30 23:12:31,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095993575] [2022-01-30 23:12:31,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 23:12:31,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-30 23:12:31,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 23:12:31,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-30 23:12:31,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2022-01-30 23:12:31,006 INFO L87 Difference]: Start difference. First operand 97 states and 101 transitions. Second operand has 32 states, 32 states have (on average 2.59375) internal successors, (83), 31 states have internal predecessors, (83), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-30 23:12:31,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 23:12:31,547 INFO L93 Difference]: Finished difference Result 191 states and 213 transitions. [2022-01-30 23:12:31,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-30 23:12:31,548 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.59375) internal successors, (83), 31 states have internal predecessors, (83), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 162 [2022-01-30 23:12:31,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 23:12:31,549 INFO L225 Difference]: With dead ends: 191 [2022-01-30 23:12:31,549 INFO L226 Difference]: Without dead ends: 127 [2022-01-30 23:12:31,550 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 317 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1336, Invalid=2204, Unknown=0, NotChecked=0, Total=3540 [2022-01-30 23:12:31,551 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 74 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-30 23:12:31,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 62 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-30 23:12:31,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-01-30 23:12:31,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2022-01-30 23:12:31,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 119 states have (on average 1.0252100840336134) internal successors, (122), 119 states have internal predecessors, (122), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-30 23:12:31,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 131 transitions. [2022-01-30 23:12:31,574 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 131 transitions. Word has length 162 [2022-01-30 23:12:31,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 23:12:31,574 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 131 transitions. [2022-01-30 23:12:31,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.59375) internal successors, (83), 31 states have internal predecessors, (83), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-30 23:12:31,575 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 131 transitions. [2022-01-30 23:12:31,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2022-01-30 23:12:31,576 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 23:12:31,576 INFO L514 BasicCegarLoop]: trace histogram [42, 42, 28, 28, 10, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 23:12:31,603 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-30 23:12:31,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-01-30 23:12:31,801 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 23:12:31,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 23:12:31,801 INFO L85 PathProgramCache]: Analyzing trace with hash 647770248, now seen corresponding path program 8 times [2022-01-30 23:12:31,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 23:12:31,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020370592] [2022-01-30 23:12:31,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 23:12:31,802 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 23:12:31,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:12:32,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 23:12:32,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:12:32,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-01-30 23:12:32,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:12:32,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-01-30 23:12:32,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:12:32,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2022-01-30 23:12:32,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:12:32,263 INFO L134 CoverageAnalysis]: Checked inductivity of 2747 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 1963 trivial. 0 not checked. [2022-01-30 23:12:32,263 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 23:12:32,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020370592] [2022-01-30 23:12:32,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020370592] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 23:12:32,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032801246] [2022-01-30 23:12:32,263 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-30 23:12:32,264 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 23:12:32,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 23:12:32,268 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 23:12:32,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-30 23:12:32,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-30 23:12:32,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 23:12:32,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 677 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-30 23:12:32,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 23:12:32,673 INFO L134 CoverageAnalysis]: Checked inductivity of 2747 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 1963 trivial. 0 not checked. [2022-01-30 23:12:32,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 23:12:33,716 INFO L134 CoverageAnalysis]: Checked inductivity of 2747 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 1963 trivial. 0 not checked. [2022-01-30 23:12:33,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032801246] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 23:12:33,717 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 23:12:33,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 62 [2022-01-30 23:12:33,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193258879] [2022-01-30 23:12:33,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 23:12:33,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-01-30 23:12:33,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 23:12:33,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-01-30 23:12:33,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2022-01-30 23:12:33,720 INFO L87 Difference]: Start difference. First operand 127 states and 131 transitions. Second operand has 62 states, 62 states have (on average 2.306451612903226) internal successors, (143), 61 states have internal predecessors, (143), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-30 23:12:35,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 23:12:35,046 INFO L93 Difference]: Finished difference Result 251 states and 288 transitions. [2022-01-30 23:12:35,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-30 23:12:35,046 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.306451612903226) internal successors, (143), 61 states have internal predecessors, (143), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 192 [2022-01-30 23:12:35,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 23:12:35,047 INFO L225 Difference]: With dead ends: 251 [2022-01-30 23:12:35,047 INFO L226 Difference]: Without dead ends: 187 [2022-01-30 23:12:35,051 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 480 GetRequests, 362 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2227 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=5371, Invalid=8909, Unknown=0, NotChecked=0, Total=14280 [2022-01-30 23:12:35,051 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 134 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-30 23:12:35,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 47 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-30 23:12:35,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-01-30 23:12:35,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2022-01-30 23:12:35,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 179 states have (on average 1.0167597765363128) internal successors, (182), 179 states have internal predecessors, (182), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-30 23:12:35,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 191 transitions. [2022-01-30 23:12:35,058 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 191 transitions. Word has length 192 [2022-01-30 23:12:35,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 23:12:35,058 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 191 transitions. [2022-01-30 23:12:35,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.306451612903226) internal successors, (143), 61 states have internal predecessors, (143), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-30 23:12:35,059 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 191 transitions. [2022-01-30 23:12:35,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2022-01-30 23:12:35,061 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 23:12:35,061 INFO L514 BasicCegarLoop]: trace histogram [58, 58, 42, 42, 10, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 23:12:35,086 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-01-30 23:12:35,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-01-30 23:12:35,285 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 23:12:35,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 23:12:35,285 INFO L85 PathProgramCache]: Analyzing trace with hash -1699853180, now seen corresponding path program 9 times [2022-01-30 23:12:35,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 23:12:35,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467861902] [2022-01-30 23:12:35,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 23:12:35,286 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 23:12:35,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:12:36,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 23:12:36,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:12:36,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2022-01-30 23:12:36,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:12:36,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2022-01-30 23:12:36,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:12:36,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 215 [2022-01-30 23:12:36,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:12:36,730 INFO L134 CoverageAnalysis]: Checked inductivity of 5327 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 1963 trivial. 0 not checked. [2022-01-30 23:12:36,730 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 23:12:36,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467861902] [2022-01-30 23:12:36,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467861902] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 23:12:36,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809949033] [2022-01-30 23:12:36,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-30 23:12:36,731 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 23:12:36,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 23:12:36,732 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 23:12:36,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-30 23:12:37,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-01-30 23:12:37,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 23:12:37,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-30 23:12:37,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 23:12:38,065 INFO L134 CoverageAnalysis]: Checked inductivity of 5327 backedges. 850 proven. 100 refuted. 0 times theorem prover too weak. 4377 trivial. 0 not checked. [2022-01-30 23:12:38,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 23:12:38,591 INFO L134 CoverageAnalysis]: Checked inductivity of 5327 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 5227 trivial. 0 not checked. [2022-01-30 23:12:38,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809949033] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 23:12:38,591 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 23:12:38,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 13, 13] total 84 [2022-01-30 23:12:38,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614135496] [2022-01-30 23:12:38,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 23:12:38,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-01-30 23:12:38,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 23:12:38,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-01-30 23:12:38,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2107, Invalid=4865, Unknown=0, NotChecked=0, Total=6972 [2022-01-30 23:12:38,595 INFO L87 Difference]: Start difference. First operand 187 states and 191 transitions. Second operand has 84 states, 84 states have (on average 2.2738095238095237) internal successors, (191), 83 states have internal predecessors, (191), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-30 23:12:40,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 23:12:40,870 INFO L93 Difference]: Finished difference Result 278 states and 298 transitions. [2022-01-30 23:12:40,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-01-30 23:12:40,871 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 2.2738095238095237) internal successors, (191), 83 states have internal predecessors, (191), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 252 [2022-01-30 23:12:40,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 23:12:40,873 INFO L225 Difference]: With dead ends: 278 [2022-01-30 23:12:40,873 INFO L226 Difference]: Without dead ends: 214 [2022-01-30 23:12:40,878 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 653 GetRequests, 490 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5209 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=6315, Invalid=20745, Unknown=0, NotChecked=0, Total=27060 [2022-01-30 23:12:40,879 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 191 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-30 23:12:40,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 75 Invalid, 495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-30 23:12:40,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-01-30 23:12:40,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 213. [2022-01-30 23:12:40,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 205 states have (on average 1.0146341463414634) internal successors, (208), 205 states have internal predecessors, (208), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-30 23:12:40,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 217 transitions. [2022-01-30 23:12:40,886 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 217 transitions. Word has length 252 [2022-01-30 23:12:40,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 23:12:40,886 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 217 transitions. [2022-01-30 23:12:40,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 2.2738095238095237) internal successors, (191), 83 states have internal predecessors, (191), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-30 23:12:40,887 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 217 transitions. [2022-01-30 23:12:40,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-01-30 23:12:40,890 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 23:12:40,890 INFO L514 BasicCegarLoop]: trace histogram [59, 59, 42, 42, 22, 22, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 23:12:40,922 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-30 23:12:41,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-01-30 23:12:41,112 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 23:12:41,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 23:12:41,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1252199886, now seen corresponding path program 10 times [2022-01-30 23:12:41,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 23:12:41,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198517185] [2022-01-30 23:12:41,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 23:12:41,113 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 23:12:41,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:12:42,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 23:12:42,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:12:42,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2022-01-30 23:12:42,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:12:42,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2022-01-30 23:12:42,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:12:42,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 241 [2022-01-30 23:12:42,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:12:42,479 INFO L134 CoverageAnalysis]: Checked inductivity of 5828 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 2347 trivial. 0 not checked. [2022-01-30 23:12:42,479 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 23:12:42,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198517185] [2022-01-30 23:12:42,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198517185] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 23:12:42,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172613086] [2022-01-30 23:12:42,479 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-30 23:12:42,479 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 23:12:42,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 23:12:42,484 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 23:12:42,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-30 23:12:42,732 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-30 23:12:42,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 23:12:42,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 1040 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-30 23:12:42,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 23:12:43,391 INFO L134 CoverageAnalysis]: Checked inductivity of 5828 backedges. 848 proven. 196 refuted. 0 times theorem prover too weak. 4784 trivial. 0 not checked. [2022-01-30 23:12:43,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 23:12:44,171 INFO L134 CoverageAnalysis]: Checked inductivity of 5828 backedges. 848 proven. 196 refuted. 0 times theorem prover too weak. 4784 trivial. 0 not checked. [2022-01-30 23:12:44,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172613086] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 23:12:44,172 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 23:12:44,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 17, 17] total 93 [2022-01-30 23:12:44,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818922569] [2022-01-30 23:12:44,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 23:12:44,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-01-30 23:12:44,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 23:12:44,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-01-30 23:12:44,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2388, Invalid=6168, Unknown=0, NotChecked=0, Total=8556 [2022-01-30 23:12:44,174 INFO L87 Difference]: Start difference. First operand 213 states and 217 transitions. Second operand has 93 states, 93 states have (on average 2.2580645161290325) internal successors, (210), 92 states have internal predecessors, (210), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-30 23:12:46,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 23:12:46,866 INFO L93 Difference]: Finished difference Result 336 states and 363 transitions. [2022-01-30 23:12:46,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-01-30 23:12:46,867 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 2.2580645161290325) internal successors, (210), 92 states have internal predecessors, (210), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 278 [2022-01-30 23:12:46,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 23:12:46,868 INFO L225 Difference]: With dead ends: 336 [2022-01-30 23:12:46,868 INFO L226 Difference]: Without dead ends: 248 [2022-01-30 23:12:46,873 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 715 GetRequests, 534 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6765 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=7158, Invalid=26148, Unknown=0, NotChecked=0, Total=33306 [2022-01-30 23:12:46,873 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 213 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-30 23:12:46,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 80 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-30 23:12:46,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-01-30 23:12:46,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 247. [2022-01-30 23:12:46,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 239 states have (on average 1.0125523012552302) internal successors, (242), 239 states have internal predecessors, (242), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-30 23:12:46,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 251 transitions. [2022-01-30 23:12:46,882 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 251 transitions. Word has length 278 [2022-01-30 23:12:46,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 23:12:46,882 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 251 transitions. [2022-01-30 23:12:46,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 2.2580645161290325) internal successors, (210), 92 states have internal predecessors, (210), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-30 23:12:46,883 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 251 transitions. [2022-01-30 23:12:46,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 377 [2022-01-30 23:12:46,885 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 23:12:46,885 INFO L514 BasicCegarLoop]: trace histogram [90, 90, 60, 60, 22, 22, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 23:12:46,903 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-30 23:12:47,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-01-30 23:12:47,086 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 23:12:47,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 23:12:47,086 INFO L85 PathProgramCache]: Analyzing trace with hash -1645049456, now seen corresponding path program 11 times [2022-01-30 23:12:47,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 23:12:47,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569430107] [2022-01-30 23:12:47,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 23:12:47,086 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 23:12:47,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:12:48,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 23:12:48,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:12:48,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-01-30 23:12:48,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:12:48,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 194 [2022-01-30 23:12:48,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:12:48,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 307 [2022-01-30 23:12:48,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:12:48,492 INFO L134 CoverageAnalysis]: Checked inductivity of 12379 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 8779 trivial. 0 not checked. [2022-01-30 23:12:48,492 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 23:12:48,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569430107] [2022-01-30 23:12:48,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569430107] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 23:12:48,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896732472] [2022-01-30 23:12:48,493 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-30 23:12:48,493 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 23:12:48,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 23:12:48,494 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 23:12:48,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process